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Mission typeOceanography
Earth observation
Remote sensing
COSPAR ID1999-029A
SATCAT no.25756Edit this on Wikidata
Mission duration11 years, 2 months
Spacecraft properties
Antrix Corp[citation needed]
Launch mass1,036 kilograms (2,284 lb)
Dimensions2.8m x 1.98m x 2.57m
Power750 watts
Start of mission
Launch date26 May 1999 (1999-05-26)
Launch siteSriharikota FLP
End of mission
Deactivated8 August 2010 (2010-08-09)
Orbital parameters
Reference systemGeocentric
Perigee716 kilometres (445 mi)
Apogee738 kilometres (459 mi)
Inclination98.28 degrees
Period99.31 minutes

OceanSat-1 or IRS-P4 is the first Indian satellite built specifically for Ocean applications. It is a part of the Indian Remote Sensing satellite series. The satellite carried Ocean Colour Monitor (OCM) and a Multi-frequency Scanning Microwave Radiometer (MSMR) for oceanographic studies.


Oceansat-1 was launched by ISRO's PSLV-C2 along with German DLR-Tubsat and South Korean KitSat 3 on 26 May 1999 from the First Launch Pad of Satish Dhawan Space Centre in Sriharikota, India. It was the third successful launch of PSLV.[2] It was the 8th satellite of the IRS satellite series of India.[3]


Oceansat-1 carried two payloads. The first of these, the Ocean Colour Monitor (OCM), is a solid state camera literally designed primarily to monitor the colour of the ocean,[4] thereby useful for documenting chlorophyll concentration, phytoplankton blooms, atmospheric aerosols and particulate matter.[1] It is capable of detecting eight spectrums ranging from 400 nm to 885 nm, all in the visible or near infrafred spectrums.[5] The second, the Multi-frequency Scanning Microwave Radiometer (MSMR), collects data by measuring microwave radiation passing through the atmosphere over the ocean.[6] This offers information including sea surface temperature, wind speed, cloud water content, and water vapour content.[1][6]

Mission completed[edit]

Although initially launched with a lifespan of 5 years, Oceansat-1 completed its mission on August 8, 2010 after serving for 11 years and 2 months.[2]


  1. ^ a b c "IRS-P4 - Gunter's Space Page". Gunter's Space Page. Retrieved 27 May 2013.
  2. ^ a b "IRS-P4 - ISRO page". ISRO. Retrieved 27 May 2013.
  3. ^ Please see the IRS launch log in the Wikipedian page Indian Remote Sensing.
  4. ^ Mather, Paul; Magaly Koch (29 December 2010). Computer Processing of Remotely-Sensed Images: An Introduction. John Wiley and Sons. p. 45. ISBN 978-0-470-66650-0.
  5. ^ Recent Advances In Environmental Science. Discovery Publishing House. 1 January 2003. p. 350. ISBN 978-81-7141-679-0.
  6. ^ a b Sastry, Hari Ram Subrahmanya; Ebenezer, D. D.; Sundaram, T. V. S. (2002). Proceedings of theInternational conference on SonarSensors of Systems, Vol. 2. Allied Publishers. p. 635. ISBN 978-81-7764-382-4.

External links[edit]