|Mission duration||Planned: 5 years|
Elapsed: 11 years and 2 months
|Launch mass||1050 kg|
|Dimensions||2.8 x 1.98 x 2.57 m|
|Start of mission|
|Launch date||26 May 1999|
|Launch site||Sriharikota, FLP|
|End of mission|
|Deactivated||8 August 2010|
|Reference system||Geocentric |
|Perigee altitude||719 km|
|Apogee altitude||730 km|
|Epoch||26 May 1999|
|Ocean Colour Monitor (OCM) |
Multi-frequency Scanning microwave radiometer (MSMR)
Oceansat-1 or IRS-P4 was the first Indian satellite built specifically 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 ISRO comprising four satellites, IRS-1B, IRS-1C, IRS-P3 and IRS-1D and extend remote sensing applications to several newer areas.
Oceansat-1 was launched by the Indian Space Research Organisation's PSLV-C2 along with German DLR-Tubsat and South Korean Kitsat-3 on 26 May 1999 from the Satish Dhawan Space Centre First Launch Pad of Satish Dhawan Space Centre in Sriharikota, India. It was the third successful launch of PSLV. It was the 8th satellite of the Indian Remote Sensing Programme (IRS) satellite series of India. Oceansat-1 was operated in a Sun-synchronous orbit. On 26 May 1999, it had a perigee of 719 kilometres (447 mi), an apogee of 730 kilometres (450 mi), an inclination of 99.0°, and an orbital period of 99.0 minutes.
Oceansat-1 carried two payloads:
The first, the Ocean Colour Monitor (OCM), is a solid state camera literally designed primarily to monitor the colour of the ocean, thereby useful for documenting chlorophyll concentration, phytoplankton blooms, atmospheric aerosols and particulate matter. It is capable of detecting eight spectrums ranging from 400 nm to 885 nm, all in the visible or near infrared spectrums. OCM monitor globally potential fishery zones, ocean currents, and pollution and sediment inputs in the coastal zones. It operates on eight wavelength bands, providing data with a swath width of 1420 km and at a resolution of 350 metres.
The second, the Multi-frequency Scanning Microwave Radiometer (MSMR), collects data by measuring microwave radiation passing through the atmosphere over the ocean. This offers information including sea surface temperature, wind speed, cloud water content, and water vapour content. MSMR monitor at 6.6 GHz.
Although initially launched with a lifespan of 5 years, Oceansat-1 completed its mission on 8 August 2010, after serving for 11 years and 2 months.