| PSLV-C1 | |
| Mission Type: | Deployment of one satellite |
| Operator: | ISRO |
| Website: | ISRO website |
| Mission Duration: | 1090.52 seconds |
| Spacecraft: | Polar Satellite Launch Vehicle |
| Spacecraft Type: | Launch vehicle |
| Manufacturer: | ISRO |
| Launch Date: | 29 September 1997, 04:47 UTC |
| Launch Rocket: | PSLV |
| Launch Site: | Sriharikota Launching Range |
| Launch Contractor: | ISRO |
| Orbit Reference: | Geocentric orbit |
| Orbit Regime: | Sun-synchronous orbit |
| Orbit Inclination: | 98.7° |
| Apsis: | gee |
| Payload Items: | IRS-1D |
| Insignia Size: | 200px |
| Programme: | Polar Satellite Launch Vehicle missions |
| Previous Mission: | PSLV-D3 |
| Next Mission: | PSLV-C2 |
PSLV-C1 was the overall fourth mission of the Polar Satellite Launch Vehicle (PSLV) program by Indian Space Research Organisation (ISRO). The vehicle carried IRS-1D satellite which was deployed in the Sun-synchronous orbit (SSO).[1] [2] [3] [4] This was India's first launch vehicle built without Russian assistance and PSLV's first operational flight placed IRS-1D into a polar orbit. However, it could not place the satellite in the desired circular orbit but in an elliptical orbit due to a leak of helium gas from one of the components. The mission was termed partial failure since the satellite could not be placed at the desired altitude.[5] [6]
PSLV-C1 was launched at 04:47 UTC on 29 September 1997 from Satish Dhawan Space Centre (then called "Sriharikota Launching Range"). The vehicle placed the IRS-1D satellite in the Sun-synchronous orbit.[1] [2] [3] [4] [5]