Oceansat-1

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)
	Earth observation satellites series ← IRS-1D Oceansat-2 →

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.^[4]

Launch

Oceansat-1 was launched by the Indian Space Research Organisation's PSLV-C2 along with the DLR-Tubsat of Germany and Kitsat-3 of South Korea 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 Polar Satellite Launch Vehicle (PSLV).^[5] 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 km (447 mi), an apogee of 730 km (450 mi), an inclination of 98.4°, and an orbital period of 99.0 minutes.^[2]

Instruments

Oceansat-1 carried two instruments:

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] MSMR monitor at 6.6 GHz.^[7]
Ocean Colour Monitor (OCM), is a solid state camera literally designed primarily to monitor the colour of the ocean,^[8] 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 infrared spectrums.^[9] 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.^[7]

Mission

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

References

^ ^a ^b ^c "IRS-P4 (Oceansat-1)". Gunter's Space Page. 7 July 2020. Retrieved 13 May 2021.
^ ^a ^b "Trajectory: IRS-P4 1999-029A". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.
^ "Ocean Colour Monitor of IRS-P4 Satellite Tested". ISRO. 3 June 1999. Retrieved 13 May 2021.
^ "Oceansat (IRS-P4)". ISRO. 26 May 1999. Retrieved 13 May 2021.
^ ^a ^b "IRS-P4 OceanSat". ISRO. Archived from the original on 21 January 2013. Retrieved 13 May 2021.
^ ^a ^b Sastry, Hari Ram Subrahmanya; Ebenezer, D. D.; Sundaram, T. V. S. (2002). Proceedings of the International conference on Sonar Sensors of Systems, Vol. 2. Allied Publishers. p. 635. ISBN 978-81-7764-382-4.
^ ^a ^b "Display: IRS-P4 1999-029A". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.
^ 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.
^ Recent Advances In Environmental Science. Discovery Publishing House. 1 January 2003. p. 350. ISBN 978-81-7141-679-0.

External links

Indian Space Research Organisation: IRS-P4

[GSP-1] "IRS-P4 (Oceansat-1)". Gunter's Space Page. 7 July 2020. Retrieved 13 May 2021.

[Trajectory-2] "Trajectory: IRS-P4 1999-029A". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.

[IRS-P4-3] "Ocean Colour Monitor of IRS-P4 Satellite Tested". ISRO. 3 June 1999. Retrieved 13 May 2021.

[Oceansat-4] "Oceansat (IRS-P4)". ISRO. 26 May 1999. Retrieved 13 May 2021.

[ISRO-5] "IRS-P4 OceanSat". ISRO. Archived from the original on 21 January 2013. Retrieved 13 May 2021.

[SastryEbenezer2002-6] Sastry, Hari Ram Subrahmanya; Ebenezer, D. D.; Sundaram, T. V. S. (2002). Proceedings of the International conference on Sonar Sensors of Systems, Vol. 2. Allied Publishers. p. 635. ISBN 978-81-7764-382-4.

[Display-7] "Display: IRS-P4 1999-029A". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.

[MatherKoch2010-8] 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.

[9] Recent Advances In Environmental Science. Discovery Publishing House. 1 January 2003. p. 350. ISBN 978-81-7141-679-0.

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v t e ← 1998 Orbital launches in 1999 2000 →
January	Mars Polar Lander ROCSAT-1
February	Stardust Globalstar 23, Globalstar 36, Globalstar 38, Globalstar 40 Telstar 6 JCSAT-6 Soyuz TM-29 ARGOS, Ørsted, SUNSAT Arabsat 3A, Skynet 4E Globus No.15
March	Wide Field Infrared Explorer Globalstar 23, Globalstar 37, Globalstar 41, Globalstar 46 AsiaSat 3S DemoSat
April	Progress M-41, Sputnik 99 INSAT-2E USA-142 Eutelsat W3 Globalstar 19, Globalstar 42, Globalstar 44, Globalstar 45 Landsat 7 UoSAT-12 Ikonos-1 ABRIXAS, Megsat-0 USA-143
May	Orion 3 Feng Yun 1C, Shijian 5 TERRIERS, MUBLCOM Nimiq 1 USA-144 Oceansat-1, Kitsat-3, DLR-Tubsat STS-96 (Starshine 1)
June	Globalstar 25, Globalstar 47, Globalstar 49, Globalstar 52 Iridium 14A, Iridium 21A Astra 1H QuikSCAT FUSE
July	Gran' No.45 Molniya 3-50 Globalstar 30, Globalstar 32, Globalstar 35, Globalstar 51 Progress M-42 Okean-O No.1 STS-93 (Chandra) Globalstar 26, Globalstar 28, Globalstar 43, Globalstar 48
August	Telkom 1, Globalstar 24, Globalstar 27, Globalstar 53, Globalstar 54 Kosmos 2365 Kosmos 2366
September	Koreasat 3 Yamal-101, Yamal-102 Foton 12 Globalstar 33, Globalstar 50, Globalstar 55, Globalstar 58 EchoStar V Ikonos 2 Telstar 7 LMI-1 Resurs F-1M
October	USA-145 DirecTV-1R CBERS-1, SACI-1 Globalstar 31, Globalstar 56, Globalstar 57, Globalstar 59 Orion 2 Ekspress A1
November	GE-4 MTSAT-1 Shenzhou 1 Globalstar 29, Globalstar 34, Globalstar 39, Globalstar 61 USA-146
December	Hélios 1B, Clémentine Orbcomm FM30, Orbcomm FM31, Orbcomm FM32, Orbcomm FM33, Orbcomm FM34, Orbcomm FM35, Orbcomm FM36 XMM-Newton † VLS-1 V02 (SACI-2) USA-147 Terra STS-103 Arirang-1, ACRIMSAT, Millennial Galaxy 11 Kosmos 2367 Kosmos 2368
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).