GISRSStudy » Remote Sensing » Oceansat Satellite


Oceansat (IRS-P4) satellite is a earth observation satellites, operated by Indian Space Research Organisation (ISRO). It is the first satellite primarily built for Ocean applications.

This satellite carries Ocean Colour Monitor (OCM) and a Multi – frequency Scanning Microwave Radiometer (MSMR) for oceanographic studies.

Oceansat Satellite Specification

  • Country of origin – India
  • Manufacturer – ISRO
  • Launched – PSLV-C2 (SHAR Centre, Sriharikota on May 26, 1999)
  • Weight – 1050 kg
  • Orbit – 720 km
  • Placed Polar Sun Synchronous
  • Equipment – Ocean Colour Monitor

Oceansat Satellites Series

DesignationLaunch date, Time (UTC)Launch massLaunch vehicleLaunch siteStatus
Oceansat-126 May 1999, 06:22:001,036 kg (2,284 lb)PSLV-G C2FLP, SDSCRetired
Oceansat-223 September 2009, 06:21960 kg (2,120 lb)PSLV-CA C14SLP, SDSCOperational
SCATSAT-126 September 2016, 03:42371 kg (818 lb)PSLV-G C35FLP, SDSCOperational
Oceansat-3August – September 2022PSLV C53SDSCPlanned


Oceansat-1 was the first Indian satellite built specifically for oceanographic applications.

The satellite was launched by ISRO’s PSLV-C2 on 26 May 1999 from the first launch pad of Satish Dhawan Space Centre in Sriharikota, This satellite is the 8th satellite of the IRS satellite series of India. It was the third successful launch of PSLV.

OceanSat-1 Specification
Launch dateMay 26, 1999
Launch siteSHAR, Sriharikota
Launch vehiclePSLV – C2
OrbitPolar Sun Synchronous
Altitude720 km
Inclination98.28 deg
Period99.31 min
Mass at lift off1050 kg
Repetitivity cycle2 days
Size2.8m x 1.98m x 2.57m
Local time of Eq. crossing12 noon
Power9.6 Sq.m Solar Array generating 750w Two 21 Ah Ni-
C d Battries
Mission CompletedAugust 8, 2010


Oceansat-2 is designed to provide service continuity for operational users of the Ocean Colour Monitor (OCM) instrument on Oceansat-1 and enhance the potential of applications in other areas.

The satellite Launched by PSLV-C14 from Satish Dhawan Space Centre, Sriharikota on
Sept. 23, 2009.

Oceansat Satellite
OceanSat-2 Specification
Launch dateSept 23, 2009
Launch siteSHAR, Sriharikota
Launch vehiclePSLV – C14
OrbitPolar Sun Synchronous
Altitude720 km
Inclination98.28 deg
Period99.31 min
Mass at lift off960 kg
Repetitivity cycle2 days
Local time of Eq. crossing12 noon ± 10 minutes
Power15 Sq.m Solar panels generating 1360W, Two 24 Ah Ni-
Cd Battries
Mission Life5 years


SCATSAT-1 carries a Ku-band scatterometer similar to the one on Oceansat-2.

The satellite was launched in 2016 after SCAT (Scanning scatterometer) on Oceansat-2 became dysfunctional after its life span of four-and-a-half years.


Oceansat-3 Expected launch date between August–September 2022.

The satellite will provide continuity to operators of OCM and enhanced ability in other applications by way of simultaneous Sea Surface Temperature (SST) measurements.

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