OceanSat-2 INSTRUMENTS

Explore instruments used in OceanSat-2 mission.

EXPLORE INSTRUMENTS

OceanSat-2 DATA

Discover how to access OceanSat-2 data

ACCESS MISSION DATA

OceanSat-2 provides service continuity for the operational users of the OCM (Ocean Colour Monitor) instrument launched in 1999 on board the predecessor IRS-P4/OceanSat-1 mission.

About OceanSat-2

OceanSat-2 is an oceanography satellite from India which launched on 23 September 2009 and remains operational.

Mission Parameters
Orbit Height 720km
Orbit Type Polar Sun-synchronous
Orbit Period 99.31 minutes
Revisit Time 2 days
Inclination 98.28°
Equator Crossing Time 12:00

OceanSat-2 Objectives

The main objectives of OceanSat-2 are to study surface winds and ocean surface strata, observation of chlorophyll concentrations, monitoring of phytoplankton blooms, study of atmospheric aerosols and suspended sediments in the water. OceanSat-2 plays an important role in forecasting the onset of the monsoon and its subsequent advancement over the Indian subcontinent and over South-East Asia.

 

OceanSat-2 Instruments

OCM-2 (Ocean Colour Monitor-2)

OCM-2 is an improved version of the one flown on OceanSat-1. OCM-2 is a solid-state radiometer providing observations in eight spectral bands in the VNIR region. It is an 8-band multi-spectral camera operating in the Visible – Near infrared spectral range. This camera provides an instantaneous geometric field of view of 360 m and a swath of 1420 km. OCM can be tilted up to + 20 degrees along track.

OCM Instrument Specifications

Parameter

Value

Spectral Range (8 bands)

0.4 - 0.9 µm (VNIR)

Scan Plane Tilt

±20º,to avoid sun glitter

Camera MTF

>20% at Nyquist frequency

IFOV at nadir (spatial resolution)

LAC: 360 m x 236 m
GAC: 1 km

FOV (swath)

1420 km (±43º)

Tilt Capability

±20º along track

Data Quantization

12 bit

Data Rate (real-time)

20.8 Mbit/s

Instrument Mass

78 kg

SNR > 512 (saturation)
Effective Focal Length 20 mm
Absolute Radiometric Accuracy <10%
Onboard Calibration 2 LEDs per band
Instrument Power 134 W

 

Table of Bands
Spectral Band Wavelength Range (nm) Application
B1 404-424  Yellow substance absorption
B2 431-451  Chlorophyll absorption
B3 476-496  Chlorophyll and other pigments
B4 500-520  Turbidity and suspended sediments
B5 546-566  Chlorophyll reference
B6 610-630  Total suspended matter estimation
B7 725-755  Atmospheric correction
B8 845-885  Atmospheric correction/aerosol optical thickness

 

Non-scientific Measuring Instruments

Scanning Scatterometer (SCAT): an active microwave device used to determine ocean surface level wind vectors through estimation of radar backscatter.

Radio Occultation Sounder for Atmospheric Studies (ROSA): a GPS occultation receiver provided by ASI (the Italian Space Agency) with an objective to characterise the lower atmosphere and the ionosphere.

OceanSat-2 Data

DATA DESCRIPTION

ESA offers to registered user the access through the Online Dissemination server to the following data collections

 
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