Chandrayaan-1 Explained

Chandrayaan-1
Mission Type:Lunar orbiter and Impactor
Operator:ISRO
Cospar Id:2008-052A
Satcat:33405
Mission Duration:Planned: 2 years
Final:
Manufacturer:ISRO
Dry Mass:560kg (1,240lb)[1]
Payload Mass:105kg (231lb)
Launch Mass:1380kg (3,040lb)[2]
Launch Date: UTC
Launch Rocket:PSLV-XL C11[3] [4]
Launch Site:Satish Dhawan Space Centre
Launch Contractor:ISRO
Last Contact: UTC
Orbit Epoch:19 May 2009
Orbit Reference:Selenocentric
Orbit Periapsis:200km (100miles)
Orbit Apoapsis:200km (100miles)
Orbit Semimajor:1758km (1,092miles)
Orbit Eccentricity:0.0
Apsis:selene
Interplanetary:
Type:orbiter
Orbits:3,400 at EOM
Arrival Date:8 November 2008
Programme:Chandrayaan programme
Next Mission:Chandrayaan-2

Chandrayaan-1 (; from Sanskrit: Sanskrit: [[Chandra]], "Moon" and Sanskrit: yāna, "craft, vehicle")[5] was the first Indian lunar probe under the Chandrayaan programme. It was launched by the Indian Space Research Organisation (ISRO) in October 2008, and operated until August 2009. The mission included an orbiter and an impactor. India launched the spacecraft using a PSLV-XL rocket on 22 October 2008 at 00:52 UTC from Satish Dhawan Space Centre, at Sriharikota, Andhra Pradesh.[6] The mission was a major boost to India's space program, as India researched and developed indigenous technology to explore the Moon.[7] The vehicle was inserted into lunar orbit on 8 November 2008.

On 14 November 2008, the Moon Impact Probe separated from the Chandrayaan orbiter at 14:36 UTC and struck the south pole in a controlled manner. The probe hit near the crater Shackleton at 15:01 UTC.[8] [9] [10] [11] The location of impact was named Jawahar Point.[12] With this mission, ISRO became the fifth national space agency to reach the lunar surface. Other nations whose national space agencies achieved similar feats were the former Soviet Union in 1959,[13] the United States in 1962,[14] Japan in 1993,[15] and ESA member states in 2006.[16] [17] [18]

Estimated cost for the project was . It was intended to survey the lunar surface for over two years, to produce a complete map of the chemical composition at the surface and its three-dimensional topography. The polar regions were of special interest as they had high probability of presence of water ice.[19] [20] One of its many achievements was the discovery of the widespread presence of water molecules in lunar soil.[21]

After almost a year, the orbiter started experiencing several technical issues including failure of the star tracker and poor thermal shielding; Chandrayaan-1 stopped communicating at about 20:00 UTC on 28 August 2009, shortly after which the ISRO officially declared that the mission was over. Chandrayaan-1 operated for 312 days as opposed to the intended two years; however, the mission achieved most of its scientific objectives, including detecting the presence of Lunar water.[22] [23] [24] [25]

On 2 July 2016, NASA used ground-based radar systems to relocate Chandrayaan-1 in its lunar orbit, almost seven years after it shut down.[26] [27] Repeated observations over the next three months allowed a precise determination of its orbit which varies between 150and in altitude every two years.[28]

History

Former Prime Minister of India, Atal Bihari Vajpayee, announced the Chandrayaan 1 project [29] The mission was a major boost to India's space program.[30] The idea of an Indian scientific mission to the Moon was first raised in 1999 during a meeting of the Indian Academy of Sciences. The Astronautical Society of India (ASI) began planning the implementation of such an idea in 2000. Soon after, the Indian Space Research Organisation (ISRO) set up the National Lunar Mission Task Force. The Task Force concluded that ISRO had the technical expertise to carry out an Indian mission to the Moon. In April 2003, over 100 Indian scientists spanning fields from planetary and space sciences, Earth sciences, physics, chemistry, astronomy, astrophysics, engineering, and communication sciences discussed and approved the Task Force recommendation to launch an Indian probe to the Moon. Six months later, in November, the Vajpayee government formally approved the mission.[21] [31]

Objectives

The mission had the following stated objectives:[32]

Goals

To reach its objective, the mission defined these goals:

Specifications

Mass
  • 13800NaN0 at launch, 6750NaN0 at lunar orbit,[33] and 5230NaN0 after releasing the impactor.
    Dimensions
  • Cuboid in shape of approximately 1.5m (04.9feet)
    Communications
  • X band, 0.7m (02.3feet) diameter dual gimballed parabolic antenna for payload data transmission. The Telemetry, Tracking & Command (TTC) communication operates in S band frequency.
    Power
  • The spacecraft was mainly powered by its solar array, which included one solar panel covering a total area of 2.15xx generating 750 W of peak power, which was stored in a 36 A·h lithium-ion battery for use during eclipses.[34]
    Propulsion
  • The spacecraft used a bipropellant integrated propulsion system to reach lunar orbit as well as orbit and altitude maintenance while orbiting the Moon. The power plant consisted of one 440 N engine and eight 22 N thrusters. Fuel and oxidizer were stored in two tanks of 390L each.
    Navigation and control
  • The craft was 3-axis stabilized with two star sensors, gyros, and four reaction wheels. The craft carried dual redundant bus management units for attitude control, sensor processing, antenna orientation, etc.

    Payload

    The scientific payload had a mass of 900NaN0, contained five Indian instruments and six instruments from other countries.

    Indian instruments

    Instruments from other countries

    Mission timeline

    During the tenure of Prime Minister Manmohan Singh, the Chandrayaan project got a boost and finally Chandrayaan-1 was launched on 22 October 2008 at 00:52 UTC from Satish Dhawan Space Centre using the ISRO's 44.4m (145.7feet) tall, four-stage PSLV C11 launch vehicle.[52] Chandrayaan-1 was sent to the Moon in a series of orbit-increasing manoeuvres around the Earth over a period of 21 days as opposed to launching the craft on a direct trajectory to the Moon.[53] At launch the spacecraft was inserted into geostationary transfer orbit (GTO) with an apogee of 22860km (14,210miles) and a perigee of 255km (158miles). The apogee was increased with a series of five orbit burns conducted over a period of 13 days after launch.

    For the duration of the mission, ISRO's telemetry, tracking and command network (ISTRAC) at Peenya in Bangalore, tracked and controlled Chandrayaan-1.[54] Scientists from India, Europe, and the U.S. conducted a high-level review of Chandrayaan-1 on 29 January 2009 after the spacecraft completed its first 100 days in space.[55]

    Earth orbit burns

    Earth orbit burns! Date (UTC)! Burn time
    (minutes)! Resulting
    apogee
    22 October
    Launch    		18.2
    in four stages    		22,860 km
    23 October1837,900 km
    25 October1674,715 km
    26 October9.5164,600 km
    29 October3267,000 km
    4 November2.5380,000 km
    First orbit burnThe first orbit-raising manoeuvre of the Chandrayaan-1 spacecraft was performed at 03:30&nbsp UTC on 23 October 2008 when the spacecraft's 440 Newton liquid engine was fired for about 18 minutes by commanding the spacecraft from Spacecraft Control Centre (SCC) at ISRO Telemetry, Tracking and Command Network (ISTRAC) at Peenya, Bangalore. With this Chandrayaan-1's apogee was raised to 37900km (23,600miles), and its perigee to 305km (190miles). In this orbit, the Chandrayaan-1 spacecraft took about 11 hours to go around the Earth once.[56]
    Second orbit burnThe second orbit-raising manoeuvre of Chandrayaan-1 spacecraft was carried out on 25 October 2008 at 00:18 UTC when the spacecraft's engine was fired for about 16 minutes, raising its apogee to 74715km (46,426miles), and its perigee to 336km (209miles), thus completing 20 percent of its journey. In this orbit, Chandrayaan-1 spacecraft took about twenty-five and a half hours to go round the Earth once. This was the first time an Indian spacecraft went beyond the 36000km (22,000miles) high geostationary orbit and reached an altitude more than twice that height.[57]
    Third orbit burnThe third orbit raising manoeuvre was initiated on 26 October 2008 at 01:38 UTC when the spacecraft's engine was fired for about nine and a half minutes. With this its apogee was raised to 164600km (102,300miles), and the perigee to 348km (216miles). In this orbit, Chandrayaan-1 took about 73 hours to go around the Earth once.[58]
    Fourth orbit burnThe fourth orbit-raising maneuver took place on 29 October 2008 at 02:08 UTC when the spacecraft's engine was fired for about three minutes, raising its apogee to 267000km (166,000miles) and the perigee to 465km (289miles). This extended its orbit to a distance more than half the way to the Moon. In this orbit, the spacecraft took about six days to go around the Earth once.[59]
    Final orbit burnThe fifth and final orbit raising manoeuvre was carried out on 3 November 2008 at 23:26 UTC when the spacecraft's engine was fired for about two and a half minutes resulting in Chandrayaan-1 entering the Lunar Transfer Trajectory with an apogee of about 380000km (240,000miles).[60]

    Lunar orbit insertion

    Lunar orbit insertion! Date (UTC)! Burn time
    (seconds)! Resulting
    periselene! Resulting
    aposelene
    8 November817504 km7,502 km
    9 November57200 km7,502 km
    10 November866187 km255 km
    11 November31101 km255 km
    12 November
    Final orbit    		100 km100 km
    Chandrayaan-1 completed the lunar orbit insertion operation on 8 November 2008 at 11:21 UTC. This manoeuvre involved firing of the liquid engine for 817 seconds (about thirteen and half minutes) when the spacecraft passed within 500km (300miles) from the Moon. The satellite was placed in an elliptical orbit that passed over the polar regions of the Moon, with 7502km (4,662miles) aposelene and 504km (313miles) periselene. The orbital period was estimated to be around 11 hours. With the successful completion of this operation, India became the fifth nation to put a vehicle in lunar orbit.[61]
    First orbit reductionFirst Lunar Orbit Reduction Manoeuvre of Chandrayaan-1 was carried out on 9 November 2008 at 14:33 UTC. During this, the engine of the spacecraft was fired for about 57 seconds. This reduced the periselene to 2000NaN0 while aposelene remained unchanged at 7,502 km. In this elliptical orbit, Chandrayaan-1 took about ten and a half hours to circle the Moon once.[62]
    Second orbit reductionThis manoeuvre was carried out on 10 November 2008 at 16:28 UTC, resulting in a steep decrease in Chandrayaan-1's aposelene to 255km (158miles) and its periselene to 187km (116miles), During this manoeuvre, the engine was fired for about 866 seconds (about fourteen and a half minutes). Chandrayaan-1 took two hours and 16 minutes to go around the Moon once in this orbit.[63]
    Third orbit reductionThird Lunar Orbit Reduction was carried out by firing the onboard engine for 31 seconds on 11 November 2008 at 13:00 UTC. This reduced the periselene to 101km (63miles), while the aposelene remained constant at 255 km. In this orbit Chandrayaan-1 took two hours and 9 minutes to go around the Moon once.[64]
    Final orbitChandrayaan-1 spacecraft was placed into a mission-specific lunar polar orbit of 1000NaN0 above the lunar surface on 12 November 2008.[65] [66] In the final orbit reduction manoeuvre, Chandrayaan-1's aposelene and periselene were both reduced to 100 km. In this orbit, Chandrayaan-1 takes about two hours to go around the Moon once. Two of the 11 payloads—the Terrain Mapping Camera (TMC) and the Radiation Dose Monitor (RADOM)—were switched on. The TMC acquired images of both the Earth and the Moon.

    Impact of the MIP on the lunar surface

    The Moon Impact Probe (MIP) crash-landed on the lunar surface on 14 November 2008, 15:01 UTC near the crater Shackleton at the south pole. The MIP was one of eleven scientific instruments (payloads) on board Chandrayaan-1.[67]

    The MIP separated from Chandrayaan at 100 km from lunar surface and began its nosedive at 14:36 UTC. going into free fall for thirty minutes. As it fell, it kept sending information back to the mother satellite which, in turn, beamed the information back to Earth. The altimeter then also began recording measurements to prepare for a rover to land on the lunar surface during a second Moon mission.[68]

    Following the deployment of the MIP, the other scientific instruments were turned on, starting the next phase of the mission.

    After scientific analyses of the received data from the MIP, the Indian Space Research Organisation confirmed the presence of water in the lunar soil and published the finding in a press conference addressed by its then Chairman G. Madhavan Nair.

    Rise of spacecraft's temperature

    ISRO had reported on 25 November 2008 that Chandrayaan-1's temperature had risen above normal to 50C,[69] Scientists said that it was caused by higher than expected temperatures in lunar orbit. The temperature was brought down by about 10C-change by rotating the spacecraft about 20 degrees and switching off some of the instruments. Subsequently, ISRO reported on 27 November 2008 that the spacecraft was operating under normal temperature conditions.[70] In subsequent reports ISRO says, since the spacecraft was still recording higher than normal temperatures, it would be running only one instrument at a time until January 2009 when lunar orbital temperature conditions are said to stabilize.[71] It was initially thought that the spacecraft was experiencing high temperature because of radiation from the Sun and infrared radiation reflected by the Moon.[72] However the rise in spacecraft temperature was later attributed to a batch of DC-DC converters with poor thermal regulation.[73] [74]

    Mapping of minerals

    The mineral content on the lunar surface was mapped with the Moon Mineralogy Mapper (M3), a NASA instrument on board the orbiter. The presence of iron was reiterated and changes in rock and mineral composition have been identified. The Oriental Basin region of the Moon was mapped, and it indicates abundance of iron-bearing minerals such as pyroxene.[75]

    In 2018 it was announced that M3 infrared data had been re-analyzed to confirm the existence of water across wide expanses of the Moon's polar regions.[76]

    Mapping of Apollo landing sites

    ISRO announced in January 2009 the completion of the mapping of the Apollo Moon missions landing sites by the orbiter, using multiple payloads. Six of the sites have been mapped, including the landing sites of Apollo 15 and Apollo 17.[77]

    Image acquisition

    The craft completed 3,000 orbits acquiring 70,000 images of the lunar surface,[78] [79] [80] which is quite a record compared to the lunar flights of other nations. ISRO officials estimated that if more than 40,000 images have been transmitted by Chandrayaan's cameras in 75 days, it worked out to nearly 535 images being sent daily. They were first transmitted to Indian Deep Space Network at Byalalu near Bangalore, from where they were flashed to ISRO's Telemetry Tracking And Command Network (ISTRAC) at Bangalore.

    Some of these images have a resolution of down to 5m (16feet), providing a sharp and clear picture of the Moon's surface, while many images sent by some of the other missions had only a 100-metre resolution.[81] For comparison, the Lunar Reconnaissance Orbiter Camera has a 0.5 meter resolution.[82]

    On 26 November, the indigenous Terrain Mapping Camera, which was first activated on 29 October 2008, acquired images of peaks and craters. This came as a surprise to ISRO officials because the Moon consists mostly of craters.[83]

    Detection of X-Ray signals

    The X-ray signatures of aluminium, magnesium and silicon were picked up by the C1XS X-ray camera. The signals were picked up during a solar flare that caused an X-ray fluorescence phenomenon. The flare that caused the fluorescence was within the lowest C1XS sensitivity range.[84] [85] [86]

    Full Earth image

    On 25 March 2009 Chandrayaan beamed back its first images of the Earth in its entirety. These images were taken with the TMC. Previous imaging was done on only one part of the Earth. The new images show Asia, parts of Africa and Australia with India being in the centre.[87] [88]

    Orbit raised to 200 km

    After the completion of all the major mission objectives, the orbit of Chandrayaan-1 spacecraft, which had been at a height of 1000NaN0 from the lunar surface since November 2008, was raised to 2000NaN0. The orbit-raising manoeuvres were carried out between 03:30 and 04:30&nbsp UTC on 19 May 2009. The spacecraft at this higher altitude enabled further studies on orbit perturbations and gravitational field variation of the Moon and also enabled imaging of the lunar surface with a wider swath.[89] It was later revealed that the true reason for the orbit change was that it was an attempt to keep the temperature of the probe down.[90] It was "...assumed that the temperature [of the spacecraft subsystems] at 100 km above the Moon's surface would be around 75 degrees Celsius. However, it was more than 75 degrees and problems started to surface. We had to raise the orbit to 200 km."[91]

    Attitude sensor failure

    The star tracker, a device used for pointing attitude determination (orientation), failed in orbit after nine months of operation. Afterward, the orientation of Chandrayaan was determined using a back-up procedure using a two-axis Sun sensor and taking a bearing from an Earth station. This was used to update three axis gyroscopes which enabled spacecraft operations. The second failure, detected on 16 May, was attributed to excessive radiation from the Sun.[92]

    Radar scans

    On 21 August 2009 Chandrayaan-1 along with the Lunar Reconnaissance Orbiter attempted to perform a bistatic radar experiment using their Mini-SAR radars to detect the presence of water ice on the lunar surface.[93] [94] The attempt was a failure; it turned out the Chandrayaan-1 radar was not pointed at the Moon during the experiment.[95]

    The Mini-SAR has imaged many of the permanently shadowed regions that exist at both poles of the Moon.[96] In March 2010, it was reported that the Mini-SAR on board the Chandrayaan-1 had discovered more than 40 permanently darkened craters near the Moon's north pole which are hypothesized to contain an estimated 600 million metric tonnes of water-ice.[97] The radar's high CPR is not uniquely diagnostic of either roughness or ice; the science team must take into account the environment of the occurrences of high CPR signal to interpret its cause. The ice must be relatively pure and at least a couple of meters thick to give this signature. The estimated amount of water ice potentially present is comparable to the quantity estimated from the previous mission of Lunar Prospector's neutron data.

    Although the results are consistent with recent findings of other NASA instruments onboard Chandrayaan-1 (the Moon Mineralogy Mapper (MP3) discovered water molecules in the Moon's polar regions, while water vapour was detected by NASA's Lunar Crater Observation and Sensing Satellite, or LCROSS) this observation is not consistent with the presence of thick deposits of nearly pure water ice within a few meters of the lunar surface, but it does not rule out the presence of small (<~10 cm), discrete pieces of ice mixed in with the regolith.[98]

    End of the mission

    The mission was launched on 22 October 2008 and expected to operate for two years. However, around 20:00 UTC on 28 August 2009 communication with the spacecraft was suddenly lost. The probe had operated for 312 days. The craft had been expected to remain in orbit for approximately another 1000 days and to crash into the lunar surface in late 2012,[99] although in 2016 it was found to still be in orbit.

    A member of the science advisory board of Chandrayaan-1 said that it is difficult to ascertain reasons for the loss of contact.[100] ISRO Chairman Madhavan Nair said that due to very high radiation, power-supply units controlling both the computer systems on board failed, snapping the communication connectivity.[101] However, information released later showed that the power supply supplied by MDI failed due to overheating.[102]

    Although the mission was less than 10 months in duration, and less than half the intended two years in length,[103] a review by scientists termed the mission successful, as it had completed 95% of its primary objectives.

    Results

    Chandrayaan's NASA Instrument Moon Mineralogy Mapper has confirmed the magma ocean hypothesis, meaning that the Moon was once completely molten.[104]

    The terrain mapping camera on board Chandrayaan-1, besides producing more than 70,000 three dimensional images, has recorded images of the landing site of U.S. spacecraft Apollo 15.[105] [106]

    TMC and HySI payloads of ISRO have covered about 70% of the lunar surface, while M3 covered more than 95% of the same and SIR-2 has provided high-resolution spectral data on the mineralogy of the Moon.

    Indian Space Research Organisation said interesting data on lunar polar areas was provided by Lunar Laser Ranging Instrument (LLRI) and High Energy X-ray Spectrometer (HEX) of ISRO as well as Miniature Synthetic Aperture Radar (Mini-SAR) of the US.

    LLRI covered both the lunar poles and additional lunar regions of interest, HEX made about 200 orbits over the lunar poles and Mini-SAR provided complete coverage of both North and South Polar Regions of the Moon.

    Another ESA payload – Chandrayaan-1 imaging X-ray Spectrometer (C1XS) – detected more than two dozen weak solar flares during the mission duration. The Bulgarian payload called Radiation Dose Monitor (RADOM) was activated on the day of the launch itself and worked until the mission's end.

    ISRO said scientists from India and participating agencies expressed satisfaction on the performance of Chandrayaan-1 mission as well as the high quality of data sent by the spacecraft.

    They have started formulating science plans based on the data sets obtained from the mission. It is expected that in the next few months, interesting results about lunar topography, mineral and chemical contents of the Moon and related aspects are expected to be published.[107]

    The Chandrayaan-1 payload has enabled scientists to study the interaction between the solar wind and a planetary body like the Moon without a magnetic field.[108]

    In its 10-month orbit around the Moon, Chandrayaan-1's X-ray Spectrometer (C1XS) detected titanium, confirmed the presence of calcium, and gathered the most accurate measurements yet of magnesium, aluminium and iron on the lunar surface.[109]

    Lunar water discovery

    On 18 November 2008, the Moon Impact Probe was released from Chandrayaan-1 at a height of 100km (100miles). During its 25-minute descent, Chandra's Altitudinal Composition Explorer (CHACE) recorded evidence of water in 650 mass spectra readings gathered during this time.[110] On 24 September 2009 Science journal reported that the NASA Instrument Moon Mineralogy Mapper (M3) on Chandrayaan-1 had detected water ice on the Moon.[111] But, on 25 September 2009, ISRO announced that the MIP, another instrument on board Chandrayaan-1, had discovered water on the Moon just before impact and had discovered it 3 months before NASA's M3.[112] The announcement of this discovery was not made until NASA confirmed it.[113] [114]

    M3 detected absorption features near 2.8–3.0 μm on the surface of the Moon. For silicate bodies, such features are typically attributed to hydroxyl- and/or water-bearing materials. On the Moon, the feature is seen as a widely distributed absorption that appears strongest at cooler high latitudes and at several fresh feldspathic craters. The general lack of correlation of this feature in sunlit M3 data with neutron spectrometer H abundance data suggests that the formation and retention of OH and H2O is an ongoing surficial process. OH/H2O production processes may feed polar cold traps and make the lunar regolith a candidate source of volatiles for human exploration.

    The Moon Mineralogy Mapper (M3), an imaging spectrometer, was one of the 11 instruments on board Chandrayaan-I that came to a premature end on 28 August 2009.[115] M3 was aimed at providing the first mineral map of the entire lunar surface. M3 data were reanalyzed years later and revealed "the most definitive proof to date" of the presence of water in shaded regions of craters near the Moon's north and south poles.

    Lunar scientists had discussed the possibility of water repositories for decades. They are now increasingly "confident that the decades-long debate is over" a report says. "The Moon, in fact, has water in all sorts of places; not just locked up in minerals, but scattered throughout the broken-up surface, and, potentially, in blocks or sheets of ice at depth." The results from the Chandrayaan mission are also "offering a wide array of watery signals."[116] [117]

    Lunar water production

    See main article: Lunar water.

    According to European Space Agency (ESA) scientists, the lunar regolith (a loose collection of irregular dust grains making up the Moon's surface) absorbs hydrogen nuclei from solar winds. Interaction between the hydrogen nuclei and oxygen present in the dust grains is expected to produce hydroxyl and water .[118]

    The SARA (Sub keV Atom Reflecting Analyser) instrument developed by ESA and the Indian Space Research Organisation was designed and used to study the Moon's surface composition and solar-wind/surface interactions. SARA's results highlight a mystery: not every hydrogen nucleus is absorbed. One out of every five rebounds into space, combining to form an atom of hydrogen. Hydrogen shoots off at speeds of around 200km/s and escapes without being deflected by the Moon's weak gravity. This knowledge provides timely advice for scientists who are readying ESA's BepiColombo mission to Mercury, as that spacecraft will carry two instruments similar to SARA.

    Lunar caves

    Chandrayaan-1 imaged a lunar rille, formed by an ancient lunar lava flow, with an uncollapsed segment indicating the presence of a lunar lava tube, a type of large cave below the lunar surface.[119] The tunnel, which was discovered near the lunar equator, is an empty volcanic tube, measuring about 2km (01miles) in length and 360m (1,180feet) in width. According to A. S. Arya, scientist SF of Ahmedabad-based Space Application Centre (SAC), this could be a potential site for human settlement on the Moon. Earlier, Japanese Lunar orbiter SELENE (Kaguya) also recorded evidence for other caves on the Moon.[120]

    Tectonism

    Data from the microwave sensor (Mini-SAR) of Chandrayaan-1 processed using the image analysis software ENVI, has revealed a good amount of past tectonic activity on the lunar surface.[121] The researchers think that the faults and fractures discovered could be features of past interior tectonic activity coupled with meteorite impacts.

    Awards

    Team

    The scientists considered instrumental to the success of the Chandrayaan-1 project are:[126] [127] [128]

    Public release of data

    Data gathered by Chandrayaan-I was made available to the public by the end of the year 2010. The data was split into two seasons with the first season going public by the end of 2010 and the second going public by the mid of 2011. The data contained pictures of the Moon and also data of chemical and mineral mapping of the lunar surface.[130]

    Follow-up missions

    See main article: Chandrayaan-2 and Chandrayaan-3. Chandrayaan-2 is a follow-up mission which was launched on 22 July 2019.[131] The mission includes a lunar orbiter, a lander named Vikram and a robotic lunar rover named Pragyan.[132] While a last-minute glitch in the landing guidance software resulted in the lander crashing, the Chandrayaan-2 orbiter is operational .[133] A third mission, called Chandrayaan-3 was launched on 14 July 2023 and it successfully soft-landed on Moon on 23 August 2023[134]

    Lunar outpost

    Chandrayaan's imagery will be used to identify regions of interest that will be explored in detail by the NASA Lunar Reconnaissance Orbiter. The interest lies in identifying lunar water on the surface that can be exploited in setting up a future lunar outpost. The Mini-SAR, one of the U.S. payloads on Chandrayaan, was used to determine the presence of water ice.[135]

    See also

    External links

    Notes and References

    1. Web site: Datta . Jayati . Chakravarty . S. C. . Chandrayaan-1 India's First Mission to Moon . VSSC.gov.in . 16 August 2019 . https://web.archive.org/web/20190816061032/https://www.vssc.gov.in/VSSC_HINDI/images/chandrayaan1/chandrayanwebsite/resourcePDF/Chandrayaan-1-booklet3.pdf . 16 August 2019.
    2. Web site: Spacecraft Description . 4 November 2008 . ISRO . dead . https://web.archive.org/web/20081028053028/http://isro.org/Chandrayaan/htmls/spacecraft_description.htm . 28 October 2008 .
    3. Web site: Mission Sequence . 5 November 2008 . ISRO . 6 July 2010 . https://web.archive.org/web/20100706225136/http://www.isro.org/chandrayaan/htmls/mission_sequence.htm . live .
    4. News: Chandrayaan-1 shifted to VAB . https://web.archive.org/web/20081017103244/http://www.hindu.com/2008/10/15/stories/2008101556421300.htm . dead . 17 October 2008 . 22 October 2008 . 15 October 2008 . The Hindu.
    5. News: India delays mission to land a rover on the moon. CNN. 30 July 2019. 5 December 2019. https://web.archive.org/web/20191205023639/https://www.cnn.com/2019/07/14/asia/india-moon-rover-launch-intl-hnk/index.html. live.
    6. News: PSLV-C11 Successfully Launches Chandrayaan-1 . 22 October 2008 . 11 March 2012 . ISRO . https://web.archive.org/web/20120107014114/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Oct22_2008 . 7 January 2012 . dead .
    7. News: Anjana . Pasricha . India Launches First Unmanned Mission to Moon . 22 October 2008 . Voice of America . 27 December 2008 . https://web.archive.org/web/20090801061001/http://www.voanews.com/english/archive/2008-10/2008-10-22-voa11.cfm . 1 August 2009 . dead .
    8. Web site: Chandrayaan-1 starts observations of the Moon . 29 July 2022 . www.esa.int . en.
    9. Web site: 18 December 2008 . An afterthought . 29 July 2022 . frontline.thehindu.com . en . 2 December 2022 . https://web.archive.org/web/20221202192105/https://frontline.thehindu.com/science-and-technology/article30198606.ece . live .
    10. News: Chandrayaan team over the Moon . 15 November 2008 . https://web.archive.org/web/20081216120324/http://www.hindu.com/2008/11/15/stories/2008111560851200.htm. dead. . 16 December 2008.
    11. Web site: 081125 Chandrayaan1 Moon probe a big hit . 29 July 2022 . www.astronomynow.com . 29 July 2022 . https://web.archive.org/web/20220729124931/https://www.astronomynow.com/081125Chandrayaan1Moonprobeabighit.html . dead .
    12. Book: https://www.isro.gov.in/sites/default/files/article-files/node/7808/from_fishing_hamlet_to_red_planet_p_v_manoranjan_r.epub. From Fishing Hamlet To Red Planet. Harper Collins. 2015. 978-9351776895. 506. 8.4 Chandrayaan-1 Mission The New Face of the Moon by J.N. GOSWAMI. The landing site of the MIP was named 'Jawahar Sthal' to commemorate the birthday of India's first Prime Minister, Jawaharlal Nehru, which also falls on 14 November coinciding with the date of the MIP impact.. 28 March 2019. 9 September 2017. https://web.archive.org/web/20170909100121/http://www.isro.gov.in/sites/default/files/article-files/node/7808/from_fishing_hamlet_to_red_planet_p_v_manoranjan_r.epub. dead.
    13. Web site: Luna 2 . 3 December 2013 . US National Space Science Data Center . 25 August 2019 . https://web.archive.org/web/20190825003339/https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1959-014A . live .
    14. Web site: Ranger 3 . 3 December 2013 . US National Space Science Data Center . 8 January 2017 . https://web.archive.org/web/20170108223625/http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1962-001A . live .
    15. Web site: Hiten . 12 April 2019 . NASA Space Science Data Coordinated Archive (NSSDCA) . 17 April 2019 . https://web.archive.org/web/20190417145523/https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1990-007A . live .
    16. News: 3 September 2006 . Probe crashes into Moon's surface . BBC News . 23 May 2010 . 13 May 2008 . https://web.archive.org/web/20080513054229/http://news.bbc.co.uk/1/hi/sci/tech/5309656.stm . live .
    17. Web site: China's lunar probe Chang'e-1 impacts moon_English_Xinhua . dead . https://web.archive.org/web/20090302170937/http://news.xinhuanet.com/english/2009-03/01/content_10923205.htm . 2 March 2009 . news.xinhuanet.com.
    18. News: Laxman . Srinivas . 15 November 2008 . Chandrayaan-I Impact Probe lands on moon . . 14 November 2008 . 20 April 2019 . https://web.archive.org/web/20190420212642/https://timesofindia.indiatimes.com/Chandrayaan-I_Impact_Probe_lands_on_moon/articleshow/3714245.cms . live .
    19. Web site: Question No. 2222: Status of Chandrayaan Programme . . Prasanna . Acharya . Prasanna Acharya . Jitendra . Singh . Jitendra Singh (BJP politician) . 3 August 2017 . 3 August 2017 . 3 August 2017 . https://web.archive.org/web/20170803171227/http://164.100.158.235/question/annex/243/Au2222.pdf . live .
    20. Title: Chandrayaan-1: Science goals . Bhandari N. . Journal of Earth System Science . 114 . 6 . 699 . 2005 . 10.1007/BF02715953 . 2005JESS..114..701B . 55469375 . 15 September 2006 . 2 December 2019 . https://web.archive.org/web/20191202113216/https://www.ias.ac.in/jessci/dec2005/ilc-14.pdf . live .
    21. Web site: Lunar Missions Detect Water on Moon. 2 November 2009. VOA.
    22. News: Chandrayaan-I Spacecraft Loses Radio Contact . https://web.archive.org/web/20090830184019/http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Aug29_2009 . dead . 30 August 2009 . 29 August 2009 . ISRO . 31 August 2009 .
    23. News: Chandrayaan-1 mission terminated . https://web.archive.org/web/20090902100254/http://www.hindu.com/2009/08/31/stories/2009083157910100.htm . dead . 2 September 2009 . 31 August 2009 . . 31 August 2009.
    24. News: Chandrayaan, India's first Moon mission is over: Project Director . 29 August 2009 . Press Trust of India . Indian Express . 19 September 2014 . 2 January 2020 . https://web.archive.org/web/20200102102648/http://indianexpress.com/?s=Chandrayaan%2C+India%27s+first+Moon+mission+is+over%3A+Project+Director . live .
    25. Web site: Chandrayan not a failure: NASA astronaut . Press Trust of India . 17 September 2009 . 14 September 2009 . https://web.archive.org/web/20090914135154/http://www.ptinews.com/news/276741_Chandrayan-not-a-failure--NASA-astronaut . live .
    26. News: NASA finds lunar spacecraft that vanished 8 years ago . CNN . Faith . Karimi . 10 March 2017 . 10 March 2017 . 25 December 2019 . https://web.archive.org/web/20191225063136/https://www.cnn.com/2017/03/10/health/nasa-chandrayaan-spacecraft-found/index.html . live .
    27. Web site: New NASA Radar Technique Finds Lost Lunar Spacecraft . NASA . D. C. . Agle . 9 March 2017 . 10 March 2017 . 13 March 2017 . https://web.archive.org/web/20170313040757/https://www.nasa.gov/feature/jpl/new-nasa-radar-technique-finds-lost-lunar-spacecraft/ . live .
    28. Web site: Question No. 2783: Chandrayaan-1 . . M. . Udhayakumar . M. Udhayakumar . Jitendra . Singh . Jitendra Singh (BJP politician) . 2 August 2017 . 2 August 2017 . https://web.archive.org/web/20170802210133/http://164.100.47.190/loksabhaquestions/annex/12/AU2783.pdf . 2 August 2017 . dead .
    29. Web site: 2003 – An Eventful Year for ISRO . www.isro.gov.in. 24 July 2019. 24 July 2019. https://web.archive.org/web/20190724181521/https://www.isro.gov.in/update/29-dec-2003/2003-eventful-year-isro. dead.
    30. News: Pallava . Bagla . India Moon mission is 'mixed success' . 31 August 2009 . BBC News . 5 December 2019 . https://web.archive.org/web/20191205023507/http://news.bbc.co.uk/2/hi/south_asia/8230230.stm . live .
    31. Web site: Chandrayaan-1: India's first scientific mission to the Moon . 17 August 2015 . https://web.archive.org/web/20140802062110/http://shiksha.isro.gov.in/pdf/books/1.pdf . 2 August 2014 . dead .
    32. Web site: Objectives . 22 October 2008 . ISRO . dead . https://web.archive.org/web/20081026041754/http://www.isro.org/Chandrayaan/htmls/objective_scientific.htm . 26 October 2008 .
    33. Web site: Specifications of Chandrayaan 1 . 22 October 2008 . October 2008 . Indian Space Research Organisation . dead . https://web.archive.org/web/20081023064658/http://www.isro.gov.in/Chandrayaan/htmls/spacecraft_description.htm . 23 October 2008 .
    34. Web site: FAQ on Chandrayaan 1 . 22 October 2008 . October 2008 . Indian Space Research Organisation . dead . https://web.archive.org/web/20081107230056/http://www.isro.gov.in/Chandrayaan/htmls/faqs.htm . 7 November 2008 .
    35. Terrain mapping camera for Chandrayaan-1 . 10.1007/BF02715955 . A. S. Kiran Kumar . A. Roy Chowdhury . J. Earth Syst. Sci. . 114 . 6 . 2005 . 717–720 . 2005JESS..114..717K . 189885169 . free . 27 October 2006 . 3 November 2019 . https://web.archive.org/web/20191103224826/https://www.ias.ac.in/jessci/dec2005/ilc-16.pdf . live .
    36. Web site: Chandrayaan 1 – The payloads . 15 March 2012 . https://web.archive.org/web/20120402130343/http://isro.gov.in/Chandrayaan/htmls/psexperiments.htm . 2 April 2012 . dead .
    37. Web site: Chandrayaan-1 Camera Tested . 1 November 2008 . ISRO . https://web.archive.org/web/20090827075801/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Oct31_2008 . 27 August 2009 . dead .
    38. Web site: LASER Instrument on Chandrayaan-1 Successfully Turned ON . 17 November 2008 . ISRO . https://web.archive.org/web/20090827091133/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Nov16_2008 . 27 August 2009 . dead .
    39. News: Laser instrument on board Chandrayaan-1 activated . https://web.archive.org/web/20090207025914/http://hindu.com/2008/11/17/stories/2008111759491100.htm . dead . 7 February 2009 . 17 November 2008 . 17 November 2008 . The Hindu.
    40. Web site: Chandrayaan-1: The Payloads . 15 March 2012 . ISRO . https://web.archive.org/web/20120402130343/http://isro.gov.in/Chandrayaan/htmls/psexperiments.htm . 2 April 2012 . dead .
    41. Web site: The Chandrayaan-1 X-ray Spectrometer: C1XS . . 21 October 2008 . dead . https://web.archive.org/web/20110716170123/http://www.sstd.rl.ac.uk/c1xs/ . 16 July 2011 .
    42. News: Chandrayaan-1 Starts Observations of the Moon . 24 November 2008 . 26 November 2008 . Space Daily.
    43. Bhardwaj . Anil . Barabash . Stas . Futaana . Yoshifumi . Kazama . Yoichi . Asamura . Kazushi . McCann . David . Sridharan . R. . Holmstrom . Mats . Wurz . Peter . Lundin . Rickard . Low energy neutral atom imaging on the Moon with the SARA instrument aboard Chandrayaan-1 mission . Journal of Earth System Science . December 2005 . 114 . 6 . 749–760 . 10.1007/BF02715960 . 2005JESS..114..749B . 55554166 . free . 2 November 2006 . 23 April 2021 . https://web.archive.org/web/20210423110307/https://www.ias.ac.in/jessci/dec2005/ilc-21.pdf . live .
    44. Web site: Sub keV Atom Reflecting Analyser (SARA) . 3 November 2008 . ISRO . https://web.archive.org/web/20081022234759/http://www.isro.org/Chandrayaan/htmls/sara_esa.htm . 22 October 2008 . dead .
    45. Web site: NASA Instrument Inaugurates 3-D Moon Imaging . 19 December 2008 . JPL . 1 January 2009 . https://web.archive.org/web/20090101015823/http://www.jpl.nasa.gov/news/news.cfm?release=2008-239 . dead .
    46. Scientific objectives and selection of targets for the SMART-2 Infrared Spectrometer (SIR) . Basilevsky A. T. . Keller H. U. . Nathues A. . Mall J. . Hiesinger H. . Rosiek M. . Planetary . Space Science . 52 . 14 . 1261–1285 . 2004 . 10.1016/j.pss.2004.09.002 . 2004P&SS...52.1261B.
    47. Web site: Near-IR Spectrometer (SIR-2) . 3 November 2008 . ISRO . https://web.archive.org/web/20081022234804/http://www.isro.org/Chandrayaan/htmls/sir-2_esa.htm . 22 October 2008 . dead .
    48. mini-SAR: An Imaging Radar for the Chandrayaan 1 Mission to the Moon . P. D. Spudis . B. Bussey . C. Lichtenberg . B. Marinelli . S. Nozette . 2005 . Lunar and Planetary Science . 26 . 1153.
    49. Web site: Miniature Synthetic Aperture Radar (Mini-SAR) . 3 November 2008 . ISRO . https://web.archive.org/web/20081106132830/http://www.isro.org/Chandrayaan/htmls/minisar_nasa.htm . 6 November 2008 . dead .
    50. News: Nasa Radar Tandem Searches For Ice on the Moon . NASA . 26 March 2012 . 5 April 2012 . https://web.archive.org/web/20120405012806/http://www.nasa.gov/mission_pages/Mini-RF/news/radar_tandem_searches.html . live .
    51. Web site: Radiation Dose Monitor Experiment (RADOM) . 3 November 2008 . ISRO . dead . https://web.archive.org/web/20120119044239/http://www.isro.org/chandrayaan/htmls/radom_bas.htm . 19 January 2012 .
    52. Web site: Chandrayaan-1 – ISRO. www.isro.gov.in. 23 August 2019. 8 July 2019. https://web.archive.org/web/20190708043347/https://www.isro.gov.in/Spacecraft/chandrayaan-1. dead.
    53. News: How Chandrayaan-1 is raised to higher orbits . https://web.archive.org/web/20081101113151/http://www.hindu.com/seta/2008/10/30/stories/2008103050121400.htm . dead . 1 November 2008 . 30 October 2008 . 31 October 2008 . The Hindu.
    54. News: Chandrayaan-1 successfully put into earth's orbit . 22 October 2008 . 22 October 2008 . Indian express . 24 August 2023 . https://web.archive.org/web/20230824114217/https://indianexpress.com/article/news-archive/chandrayaan-i-successfully-put-into-earths-orbit/ . live .
    55. News: 100 days of Chandrayaan-1 launch . The Times of India . Times News Network . 22 January 2009 . 8 August 2017 . 24 August 2023 . https://web.archive.org/web/20230824114205/https://timesofindia.indiatimes.com/india/100-days-of-Chandrayaan-1-launch/articleshow/4012996.cms . live .
    56. Web site: Chandrayaan-1 Spacecraft's Orbit Raised . Indian Space Research Organisation . 23 October 2008 . 8 August 2017 . 9 August 2017 . https://web.archive.org/web/20170809092154/http://www.isro.gov.in/update/23-oct-2008/chandrayaan-1-spacecrafts-orbit-raised . dead .
    57. Web site: Chandrayaan-1 Spacecraft's Orbit Raised Further . 30 October 2008 . ISRO . https://web.archive.org/web/20090827095016/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Oct25a_2008 . 27 August 2009 . dead .
    58. Web site: Chandrayaan-1 enters Deep Space . 30 October 2008 . ISRO . https://web.archive.org/web/20090827080951/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Oct26_2008 . 27 August 2009 . dead .
    59. Web site: Chandrayaan-1's orbit closer to Moon . 30 October 2008 . ISRO . https://web.archive.org/web/20090827072516/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Oct29_2008 . 27 August 2009 . dead .
    60. Web site: Chandrayaan-1 enters Lunar Transfer Trajectory . 4 November 2008 . ISRO . https://web.archive.org/web/20090827090227/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Nov04_2008 . 27 August 2009 . dead .
    61. Web site: Chandrayaan-1 Successfully Enters Lunar Orbit. ISRO. https://web.archive.org/web/20140630200638/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Nov08_2008. 30 June 2014. 8 November 2008.
    62. Web site: First Lunar Orbit Reduction Manoeuvre of Chandrayaan-1 Successfully Carried Out . 10 November 2008 . ISRO . https://web.archive.org/web/20090928065216/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Nov10_2008 . 28 September 2009 . dead .
    63. News: Now, one step closer to Moon . https://web.archive.org/web/20081216101854/http://www.hindu.com/2008/11/11/stories/2008111158200100.htm . dead . 16 December 2008 . 10 November 2008 . . 11 November 2008.
    64. News: Chandrayaan's orbit further reduced . https://web.archive.org/web/20081216112804/http://www.hindu.com/2008/11/12/stories/2008111261331200.htm . dead . 16 December 2008 . 11 November 2008 . . 12 November 2008.
    65. Web site: Jonathan McDowell . Jonathan's Space Report No. 603 . . 15 November 2008 . 16 November 2008 . https://web.archive.org/web/20180910024216/http://host.planet4589.org/space/jsr/back/news.603 . 10 September 2018 . dead .
    66. Web site: Chandrayaan-1 Successfully Reaches its Operational Lunar Orbit . 12 November 2008 . ISRO . https://web.archive.org/web/20090827100002/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Nov12_2008 . 27 August 2009 . dead .
    67. News: Chandrayaan-I Impact Probe lands on the Moon . https://web.archive.org/web/20121022074629/http://articles.timesofindia.indiatimes.com/2008-11-15/india/27904216_1_lunar-surface-moon-impact-probe-chandrayaan . dead . 22 October 2012 . 14 November 2008 . Srinivas . Laxman . . 15 November 2008.
    68. News: India to go alone in second Moon mission . 18 August 2013 . UMMID . 15 September 2013 . 24 August 2023 . https://web.archive.org/web/20230824114207/https://ummid.com/news/2013/August/18.08.2013/india-moon-mission.html . live .
    69. News: India moon craft hit by heat rise . BBC News . Swaminathan . Natarajan . 25 November 2008 . 28 November 2008 . 24 August 2023 . https://web.archive.org/web/20230824114249/http://news.bbc.co.uk/2/hi/south_asia/7748611.stm . live .
    70. News: All fine with Chandrayaan-1: ISRO chief . https://web.archive.org/web/20110811080824/http://articles.timesofindia.indiatimes.com/2008-11-27/ahmedabad/27935978_1_chandrayaan-payloads-lunar-surface . dead . 11 August 2011 . 27 November 2008 . 27 November 2008 . The Times of India.
    71. News: Chandrayaan-1 takes summer break till mid Jan . 27 November 2008 . 27 November 2008 . Economic Times . 24 August 2023 . https://web.archive.org/web/20230824114213/https://economictimes.indiatimes.com/chandrayaan-1-takes-summer-break-till-mid-jan/articleshow/3768291.cms . live .
    72. News: Indian Moon probe feels the heat . 27 November 2008 . 27 November 2008 . New Scientist . 24 August 2023 . https://web.archive.org/web/20230824114212/https://www.newscientist.com/article/dn16152-indian-moon-probe-feels-the-heat/ . live .
    73. Web site: Dr M Annadurai, Project director, Chandrayaan 1: 'Chandrayaan 2 logical extension of what we did in first mission'. 29 June 2019. The Indian Express. en-IN. 9 July 2019. 29 June 2019. https://web.archive.org/web/20190629180634/https://indianexpress.com/article/india/dr-m-annadurai-project-director-chandrayaan-1-chandrayaan-2-isro-moon-5805873/. live.
    74. News: Celebrating India's moon moment. Bagla. Pallava. 22 October 2010. The Hindu. 9 July 2019. en-IN. 0971-751X. 24 August 2023. https://web.archive.org/web/20230824114837/https://www.thehindu.com/opinion/lead/Celebrating-Indias-moon-moment/article15788241.ece. live.
    75. News: Chandrayaan reveals changes in rock composition . https://web.archive.org/web/20110811080837/http://articles.timesofindia.indiatimes.com/2008-12-26/india/27905873_1_moon-mineralogy-mapper-chandrayaan-1-carle-pieters . dead . 11 August 2011 . 26 December 2008 . 12 January 2009 . The Times of India.
    76. News: Ice on the Surface of the Moon? Almost Certainly, New Research Shows. Fortin. Jacey. 22 August 2018. The New York Times. 22 August 2018. en. 22 August 2018. https://web.archive.org/web/20180822091635/https://www.nytimes.com/2018/08/22/science/ice-moon.html. live.
    77. Web site: Results from Chandrayaan 1 mission . ISRO website . 23 October 2014 . https://web.archive.org/web/20141023233203/http://isrohq.vssc.gov.in/isr0dem0v2/index.php/science/science-history/74-general/1005-chandrayaan-1mission . 23 October 2014 . dead .
    78. News: Chandrayaan sensor fails; craft's life may be reduced . 17 July 2009 . The Hindu . 17 July 2009 . 6 November 2012 . https://web.archive.org/web/20121106060808/http://www.hindu.com/thehindu/holnus/000200907170920.htm . live .
    79. Web site: Chandrayaan-1 spacecraft completes 3000 orbits around the Moon . 18 July 2009 . ISRO . https://web.archive.org/web/20090827084622/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Jul17_2009 . 27 August 2009 . dead .
    80. News: Chandrayaan falters as 'star sensors' fail . https://web.archive.org/web/20090723080539/http://www.hindu.com/2009/07/18/stories/2009071858970100.htm . dead . 23 July 2009 . 18 July 2009 . . 18 July 2009.
    81. Web site: Indian Moon Mission Pictures Show Triangular Pyramid Anomaly – UFO Sighting 2019 UFO News UFO 2019 Roswell UFO. 29 November 2011. 30 November 2011. https://web.archive.org/web/20111130063950/http://www.ufo-blogger.com/2009/01/indian-moon-mission-pictures-show.html. dead.
    82. Web site: About | Lunar Reconnaissance Orbiter Camera. lroc.sese.asu.edu. 10 May 2020. 10 May 2020. https://web.archive.org/web/20200510080015/http://lroc.sese.asu.edu/about. live.
    83. News: Chandrayaan beams back 40,000 images in 75 days . 15 January 2009 . 16 January 2009 . Times of India . Srinivas . Laxman . 12 February 2009 . https://web.archive.org/web/20090212123454/http://timesofindia.indiatimes.com/Cities/Ahmedabad/Chandrayaan_beams_back_40000_images_in_75_days/rssarticleshow/3979496.cms . live .
    84. News: C1XS Catches First Glimpse of X-rays from the Moon . 23 January 2009 . 16 February 2009 . ISRO . https://web.archive.org/web/20090926155815/http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Jan23_2009 . 26 September 2009 . dead .
    85. News: Chandrayaan detects X-ray signals . https://web.archive.org/web/20090126225635/http://hindu.com/2009/01/24/stories/2009012454901100.htm . dead . 26 January 2009 . 24 January 2009 . . 25 January 2009 .
    86. News: Chandrayaan-1 Instrument Detects First X-ray Signature from Moon . 23 January 2009 . 25 January 2009 . Universe Today . 8 June 2011 . https://web.archive.org/web/20110608000126/http://www.universetoday.com/24062/chandrayaan-1-instrument-detects-first-x-ray-signature-from-moon/ . live .
    87. News: Chandrayaan's first image of Earth in its entirety . The Hindu . Divya . Gandhi . 11 April 2009 . 12 March 2017 . 30 July 2020 . https://web.archive.org/web/20200730111234/https://www.thehindu.com/todays-paper/Chandrayaanrsquos-first-image-of-Earth-in-its-entirety/article16613390.ece . live .
    88. Web site: Image of Earth from Chandrayaan-1 . The Planetary Society . 25 March 2009 . 12 March 2017 . 13 March 2017 . https://web.archive.org/web/20170313130940/http://www.planetary.org/multimedia/space-images/earth/tmc11_L0L1_01654_3_Subsampled-2m_cropped.html . live .
    89. Web site: The Orbit of Chandrayaan-1 Raised . 21 May 2009 . ISRO . https://web.archive.org/web/20090817050543/http://www.isro.gov.in/pressrelease/scripts/pressreleasein.aspx?May20_2009 . 17 August 2009 . dead .
    90. https://www.newscientist.com/article/mg20327253.500-moons-heat-hastened-indian-probes-demise.html "Moon's heat hastened Indian probe's demise"
    91. News: Pereira . Andrew . Chandrayaan-I was 'killed' by heat stroke . https://web.archive.org/web/20110811080919/http://articles.timesofindia.indiatimes.com/2009-09-07/india/28066525_1_chandrayaan-1-lunar-surface-scientific-goals . dead . 11 August 2011 . 13 March 2012 . . 7 September 2009.
    92. News: Chandrayaan's first sensor failed much earlier . https://web.archive.org/web/20090722074303/http://www.hindu.com/2009/07/19/stories/2009071958920900.htm . dead . 22 July 2009 . 19 July 2009 . . 19 July 2009.
    93. News: NASA And ISRO Satellites Perform In Tandem To Search For Ice on the Moon . NASA . 22 August 2009 . 28 December 2018 . https://web.archive.org/web/20181228213937/https://www.nasa.gov/mission_pages/Mini-RF/news/tandem_search.html . live .
    94. News: ISRO-NASA Joint Experiment To Search for Water Ice on the Moon . 21 August 2009 . ISRO . 22 August 2009 . dead . https://web.archive.org/web/20090901112837/http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Aug21_2009 . 1 September 2009 .
    95. News: Nancy . Atkinson . Joint Experiment with Chandrayaan-1 and LRO Failed . 11 September 2011 . Universe Today . 26 March 2012 . 28 December 2018 . https://web.archive.org/web/20181228214029/https://www.universetoday.com/39811/anticipated-joint-experiment-with-chandrayaan-1-and-lro-failed/ . live .
    96. News: NASA Radar Finds Ice Deposits at Moon's North Pole . March 2010 . . 26 March 2012 . 21 September 2015 . https://web.archive.org/web/20150921013327/http://www.nasa.gov/mission_pages/Mini-RF/multimedia/feature_ice_like_deposits.html . live .
    97. http://news.bbc.co.uk/1/hi/sci/tech/8544635.stm "Ice deposits found at Moon's pole"
    98. The nature of lunar volatiles as revealed by Mini-RF observations of the LCROSS impact site . Journal of Geophysical Research: Planets . 13 January 2011 . C. D. Neish . D. B. J. Bussey . P. Spudis . W. Marshall . B. J. Thomson . G. W. Patterson . L. M. Carter . 116 . E01005 . 8 . the Mini-RF instruments on ISRO's Chandrayaan-1 and NASA's Lunar Reconnaissance Orbiter (LRO) obtained S band (12.6 cm) synthetic aperture radar images of the impact site at 150 and 30 m resolution, respectively. These observations show that the floor of Cabeus has a circular polarization ratio (CPR) comparable to or less than the average of nearby terrain in the southern lunar highlands. Furthermore, <2% of the pixels in Cabeus crater have CPR values greater than unity. This observation is not consistent with presence of thick deposits of nearly pure water ice within a few meters of lunar surface, but it does not rule out the presence of small (<~10 cm), discrete pieces of ice mixed in with the regolith. . 10.1029/2010JE003647 . 2011JGRE..116.1005N .
    99. http://articles.economictimes.indiatimes.com/2009-09-01/news/27634980_1_chandrayaan-1-chandrayaan-2-lunar-surface Chandrayaan-1 off radar, but will work for 1000 days
    100. Web site: ISRO Loses Chandrayaan-1 . 1 September 2009 . 16 July 2011 . https://web.archive.org/web/20110716011220/http://www.satellitetoday.com/st/headlines/ISRO-Loses-Chandrayaan-1_31940.html . dead .
    101. https://web.archive.org/web/20090902100254/http://www.hindu.com/2009/08/31/stories/2009083157910100.htm Chandrayaan-1 mission terminated
    102. http://www.thehindubusinessline.com/2010/07/10/stories/2010071052090100.htm Power supply glitch partially cripples Insat-4B
    103. Web site: Chandrayaan 1 Mission Terminated. https://web.archive.org/web/20110813213111/http://www.techtree.com/India/News/Chandrayaan_1_Mission_Officially_Terminated/551-105927-547.html. dead. 13 August 2011.
    104. News: Chandrayaan confirms Moon was once completely molten: Scientist . 2 September 2009 . 26 September 2009 . Economic Times . https://web.archive.org/web/20090906013609/http://economictimes.indiatimes.com/News/News-By-Industry/Chandrayaan-confirms-moon-was-once-completely-molten-Scientist/articleshow/4963591.cms . 6 September 2009 . dead .
    105. News: Scientist Rubbishes Apollo 15 Conspiracy Theory . 4 September 2009 . 26 September 2009 . Moondaily.com . https://web.archive.org/web/20090908010233/http://www.moondaily.com/reports/Scientist_Rubbishes_Apollo_15_Conspiracy_Theory_999.html . 8 September 2009 . dead .
    106. News: Chandrayaan sends images of Apollo 15 landing . https://web.archive.org/web/20110811080929/http://articles.timesofindia.indiatimes.com/2009-09-02/india/28083351_1_chandrayaan-1-lunar-mission-lunar-reconnaissance-orbiter . dead . 11 August 2011 . 2 September 2009 . 26 September 2009 . The Times of India.
    107. News: Chandrayaan Enables Study Interaction Without Magnetic Field . 10 September 2009 . 26 September 2009 . SpaceDaily.com . https://web.archive.org/web/20090914001206/http://www.spacedaily.com/reports/Chandrayaan_Enables_Study_Interaction_Without_Magnetic_Field_999.html . 14 September 2009 . dead .
    108. News: Chandrayaan enables study interaction without magnetic field . 8 September 2009 . 26 September 2009 . DNAIndia.com . 11 September 2009 . https://web.archive.org/web/20090911161301/http://www.dnaindia.com/bangalore/report_chandrayaan-enables-study-interaction-without-magnetic-field_1288577 . live .
    109. News: Solar flares shine light on Moon's minerals . https://web.archive.org/web/20090923175737/http://www.hindu.com/2009/09/19/stories/2009091958942000.htm . dead . 23 September 2009 . 19 September 2009 . . 26 September 2009 .
    110. Web site: Water on the Moon: Direct evidence from Chandrayaan-1's Moon Impact.... 30 September 2014. 20 September 2019. https://web.archive.org/web/20190920161640/http://www.planetary.org/blogs/emily-lakdawalla/2010/2430.html. live.
    111. News: Character and Spatial Distribution of OH/H2O on the Surface of the Moon Seen by M3 on Chandrayaan-1 . 15 September 2009 . 26 September 2009 . Science Mag . 18 November 2009 . https://web.archive.org/web/20091118041025/http://www.sciencemag.org/cgi/content/abstract/sci;1178658v1 . live .
    112. News: MIP detected water on Moon way back in June: ISRO Chairman . . 25 September 2009 . 9 June 2013 . Bangalore . 25 January 2016 . https://web.archive.org/web/20160125193516/http://www.thehindu.com/sci-tech/science/mip-detected-water-on-moon-way-back-in-june-isro-chairman/article24854.ece . live .
    113. News: Chandrayaan first discovered water on Moon, but? . . 25 September 2009 . DNA . 9 June 2013 . Bangalore . 11 June 2020 . https://web.archive.org/web/20200611141014/https://www.dnaindia.com/technology/report-chandrayaan-first-discovered-water-on-moon-but-1292942 . live .
    114. News: Did India beat NASA to find water on Moon? . . 25 September 2009 . 9 June 2013 . Bagla, Pallav . Bangalore . 6 October 2014 . https://web.archive.org/web/20141006180606/http://www.ndtv.com/article/sci-tech/did-india-beat-nasa-to-find-water-on-moon-9091 . live .
    115. Web site: Welcome To ISRO:: Press Release:: 29 August 2009 . dead . https://web.archive.org/web/20120903104432/http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Aug29_2009 . 3 September 2012 . 101004 isro.org
    116. News: It's not lunacy, probes find water in Moon dirt . 23 September 2009 . 26 September 2009 . USA Today . 27 September 2009 . https://web.archive.org/web/20090927052332/http://www.usatoday.com/tech/science/2009-09-23-moon-water_N.htm . live .
    117. News: Water discovered on Moon?: "A lot of it actually" . https://web.archive.org/web/20090926073133/http://www.hindu.com/2009/09/23/stories/2009092357770100.htm . dead . 26 September 2009 . 23 September 2009 . . 26 September 2009 .
    118. Book: India Space Programs and Exploration Handbook . August 2013 . International Business Publications, USA . 9781433023149 .
    119. A. S. Arya, R. P. Rajasekhar, Guneshwar Thangjam, Ajai and A. S. Kiran Kumar, "Detection of potential site for future human habitability on the Moon using Chandrayaan-1 data", Current Science, Vol. 100, NO. 4, 25 February 2011 (accessed 24 January 2015)
    120. National Geographic . Scientists May Have Spotted Buried Lava Tubes on the Moon . Nadia . Drake . Nadia Drake . 25 March 2016 . 10 March 2017 . 23 February 2017 . https://web.archive.org/web/20170223104121/http://phenomena.nationalgeographic.com/2016/03/25/scientists-may-have-spotted-buried-lava-tubes-on-the-moon/ . dead .
    121. Moon shows Earth-like tectonic activity . Nature India . 25 April 2014 . Priyadarshini . Subhra . 10.1038/nindia.2014.57 . 29 April 2014 . 29 April 2014 . https://web.archive.org/web/20140429235119/http://www.nature.com/nindia/2014/140425/full/nindia.2014.57.html . live .
    122. Web site: domain-b.com : American astronautics society award for Chandrayaan-1 team. www.domain-b.com. 24 August 2023. 4 April 2023. https://web.archive.org/web/20230404183843/https://www.domain-b.com/aero/aero_general/20090901_chandrayaan1.html. live.
    123. News: Chandrayaan-1 wins global award . 30 November 2008 . Tribune News Service . 2 February 2015 . Choudhury, Shubhadeep . Bangalore . 8 August 2014 . https://web.archive.org/web/20140808030908/http://www.tribuneindia.com/2008/20081201/nation.htm#14 . live .
    124. Web site: NSS awards for 2009 . National Space Society . 2 February 2015 . 2 February 2015 . https://web.archive.org/web/20150202011649/http://www.nss.org/awards/2009.html . dead .
    125. Web site: NASA's Lunar Impact Mission Honored by National Space Society . National Aeronautics and Space Administration . 17 June 2010 . 2 February 2015 . Hoover, Rachel . 9 January 2013 . https://web.archive.org/web/20130109115404/http://www.nasa.gov/centers/ames/news/features/2010/lcross_award.html . live .
    126. News: The men behind the mission . 22 October 2008 . 31 October 2008 . NDTV . dead . https://web.archive.org/web/20081026232401/http://www.ndtv.com/convergence/ndtv/moonmission/Election_Story.aspx?id=NEWEN20080069746 . 26 October 2008 .
    127. News: Looking beyond Chandrayaan-1 . 15 October 2008 . 30 October 2008 . Economic Times . 13 January 2009 . https://web.archive.org/web/20090113200956/http://economictimes.indiatimes.com/articleshow/msid-3598007.cms . live .
    128. News: The Chandrayaan Team . 30 October 2008 . Zee News . 23 October 2008 . https://web.archive.org/web/20081023191151/http://www.zeenews.com/chandrayaan/story.aspx?aid=477110 . live .
    129. Web site: Launch authorization board . https://archive.today/20141028143218/http://www.telegraphindia.com/1081023/jsp/nation/story_10008285.jsp . dead . 28 October 2014 . Telegraph India . 23 October 2008 . 28 October 2014.
    130. News: Data From Chandrayaan Moon Mission To Go Public . 6 September 2010 . 10 September 2010 . Space-Travel . https://web.archive.org/web/20100909142705/http://www.space-travel.com/reports/Data_From_Chandrayaan_Moon_Mission_To_Go_Public_999.html . 9 September 2010 . dead.
    131. Web site: GSLV MkIII-M1 Successfully Launches Chandrayaan-2 spacecraft – ISRO. www.isro.gov.in. 23 July 2019. 12 December 2019. https://web.archive.org/web/20191212123035/https://www.isro.gov.in/update/22-jul-2019/gslv-mkiii-m1-successfully-launches-chandrayaan-2-spacecraft. dead.
    132. Web site: Question No. 1084: Deployment of Rover on Lunar Surface . . T. . Rathinavel . T. Rathinavel . Jitendra . Singh . Jitendra Singh (BJP politician) . 24 November 2016 . 2 August 2017 . 2 August 2017 . https://web.archive.org/web/20170802142742/http://164.100.158.235/question/annex/241/Au1084.pdf . live .
    133. News: Guptan . Mahesh . 16 November 2019 . How did Chandrayaan 2 fail? ISRO finally has the answer . The Week . 3 January 2020 . 19 February 2021 . https://web.archive.org/web/20210219143203/https://www.theweek.in/news/sci-tech/2019/11/16/how-did-chandrayaan-2-fail-isro-answer.html . live .
    134. Web site: Chandrayaan-3 . 14 July 2023 . www.isro.gov.in . 10 July 2023 . https://web.archive.org/web/20230710170915/https://www.isro.gov.in/Chandrayaan3.html . live .
    135. News: Moonbase: In the Dark on Lunar Ice . Space.com . Leonard . David . 26 December 2006 . 9 August 2017 . 9 August 2017 . https://web.archive.org/web/20170809130226/https://www.space.com/3296-moonbase-dark-lunar-ice.html . live .

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