Indian Mini Satellite bus explained

Indian Mini Satellite (IMS) is a family of modular^[1] mini satellite buses developed by the Indian Space Research Organisation (ISRO).^{[2] [3]}

Variants

Indian Mini Satellite (Variants)

Feature	IMS-1^[4] ^[5] ^[6] ^[7]	IMS-2^[8]	IMS-3 (Planned IMS-2 Derivative)^[9]
Launch Mass	100kg (200lb)	450kg (990lb)	450kg (990lb)
Maximum bus mass	70kg (150lb)	250kg (550lb)	250kg (550lb)
Payload mass	30kg (70lb)	200kg (400lb)	200kg (400lb)
Propellant	3.5kg (07.7lb)	21kg (46lb)
Design lifetime	2 years	5 years
Raw bus voltage	28-33 Volts	28-33 Volts	28-42 Volts
Solar Array Power	330 Watts (EOL)	675 Watts (EOL) 850 Watts (BOL)	850 Watts (BOL)
Payload power	30 Watts (Continuous) 70 Watts (Duty Cycle)	250 Watts (Continuous) 600 Watts (Duty Cycle)	250 Watts (Continuous) 400 Watts (Duty Cycle)
Attitude Control	3-axis stabilized Four Reaction Wheels Single 1N thruster	3-axis stabilized Four Reaction Wheels Mono-propellant RCS Four 1N thrusters Four 0.2N thrusters
Pointing Accuracy	±0.1° (3σ) (all axes)	± 0.1° (all axes)	± 0.1° (all axes)
SSR Storage	32 Gb	32 Gb (SDRAM) 256 Gb (Flash Memory)	32 Gb (SDRAM) 256 Gb (Flash Memory)
Payload data storage	≤ 16 Gb	≤ 32 Gb
Downlink	≤ 8 Mbit/s DL rate	≤ 105 Mbit/s DL rate	≤ 160 Mbit/s DL rate
Missions	IMS-1^[10] Youthsat^[11] Microsat-TD^[12]	SARAL^[13] ScatSat-1^[14] EMISAT^[15] HySIS

See also

• Comparison of satellite buses

Notes and References

1. Web site: 63rd International Astronautical Congress 2012 : 19th SYMPOSIUM ON SMALL SATELLITE MISSIONS (B4) : Generic Technologies for Small/Micro Platforms (6A). Iafastro.net. 10 August 2017.
   - Web site: SARAL - eoPortal Directory - Satellite Missions. Directory.eoportal.org. 10 August 2017.
2. Web site: Archived copy . 7 February 2014 . dead . https://web.archive.org/web/20140308041430/http://www.isro.org/newsletters/contents/nnrms/NNRMS%20Bulletin%202013.pdf . 8 March 2014 .
3. Thyagarajan. K. Raghava Murthy. D.V.A.. 3 June 2009. Micro- and mini-satellites of ISRO—technology and applications. Acta Astronautica. 65. 9,10. 1375–1382. 10.1016/j.actaastro.2009.03.050. 2009AcAau..65.1375T.
4. Web site: IMS-1 - eoPortal Directory - Satellite Missions. directory.eoportal.org. en-US. 2018-11-05.
5. Web site: 15 March 2022 . Interest Exploratory Note: Indian Mini Satellite-1 (IMS-1) Bus . live . https://web.archive.org/web/20220315103331/https://www.nsilindia.co.in/sites/default/files/u1/IEN%20for%20IMS-1_0.pdf . 15 March 2022 . 15 March 2022.
6. Small Satellites in Inclined Orbits to Increase Observation Capability Feasibility Analysis. 6 January 2018. International Journal of Pure and Applied Mathematics. 118. 17. 273–288. https://web.archive.org/web/20181104222747/https://acadpubl.eu/jsi/2018-118-16-17/articles/17/18.pdf. 4 November 2018. 5 Nov 2018.
7. Web site: 15 March 2022 . Interest Exploratory Note Indian Mini Satellite-1 (IMS-1) Bus .
8. Web site: SARAL - Satellite for Argos and AltiKa. MOSDAC. 5 Nov 2018.
9. Web site: Earth Observation & Small Satellite Systems, User Interaction Meet 2015. Annadurai. Mylswamy. 22 January 2015. NRSC.gov.in. https://web.archive.org/web/20150327055110/http://nrsc.gov.in/pdf/1.1.User%20Meet_NRSC_2015-01-21_Ver-2_Anna_durai.pdf. 27 March 2015.
10. Web site: IMS-1 - ISRO. isro.gov.in. 28 October 2015. 10 September 2017. https://web.archive.org/web/20170910030650/http://www.isro.gov.in/Spacecraft/ims-1. dead.
11. Web site: YouthSat (IMS 1A). Space.skyrocket.de. 28 October 2015.
12. Web site: Microsat. ISRO. 12 January 2018. 25 January 2018. https://web.archive.org/web/20180125015338/https://www.isro.gov.in/Spacecraft/microsat-0. dead.
13. News: SARAL - ISRO. 28 October 2015. isro.gov.in. 31 July 2017. https://web.archive.org/web/20170731201231/http://www.isro.gov.in/Spacecraft/saral. dead.
    - News: Old Faithful does it again. 28 October 2015. The Hindu. 2013-02-27.
14. Web site: SCATSat-1 (Scatterometer Satellite-1). Directory.eoportal.org. 10 August 2017.
15. Web site: EMISAT. Gunter's Space Page . Gunter . Krebs. 24 January 2018.