Oceansat-1
| Names | OceanSat-1 IRS-P4 Indian Remote Sensing satellite-P4 |
|---|---|
| Mission type | Earth observation Oceanography |
| Operator | ISRO |
| COSPAR ID | 1999-029A |
| SATCAT no. | 25756 |
| Website | https://www.isro.gov.in/ |
| Mission duration | 5 years (planned) 11 years (achieved) |
| Spacecraft properties | |
| Spacecraft | OceanSat-1 |
| Bus | IRS-1A |
| Manufacturer | Indian Space Research Organisation |
| Launch mass | 1,050 kg (2,310 lb) |
| Dimensions | 2.80 m x 1.98 m x 2.57 m |
| Power | 750 watts |
| Start of mission | |
| Launch date | 26 May 1999, 06:22 UTC |
| Rocket | Polar Satellite Launch Vehicle, PSLV-C2 |
| Launch site | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| Contractor | Indian Space Research Organisation |
| Entered service | August 1999 |
| End of mission | |
| Deactivated | 8 August 2010 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Sun-synchronous orbit |
| Perigee altitude | 719 km (447 mi) |
| Apogee altitude | 730 km (450 mi) |
| Inclination | 98.4° |
| Period | 99.0 minutes |
| Instruments | |
| Multi-frequency Scanning microwave radiometer (MSMR) Ocean Colour Monitor (OCM) | |
Oceansat-1 or IRS-P4 was the first Indian satellite built primarily for ocean applications. It was a part of the Indian Remote Sensing Programme satellite series. The satellite carried an Ocean Colour Monitor (OCM) and a Multi-frequency Scanning Microwave Radiometer (MSMR) for oceanographic studies. Oceansat-1 thus vastly augment the IRS satellite system of Indian Space Research Organisation (ISRO) comprising four satellites, IRS-1B, IRS-1C, IRS-P3 and IRS-1D and extend remote sensing applications to several newer areas.