Mission
Overview
OceanSat-2 is an oceanography satellite from India which launched on 23rd September 2009 and remains operational.
| 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 |
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.
Instruments
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.
|
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 |
|
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 |
| 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 |
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.
Data
DATA DOWNLOADDownload data from Oceansat-2 mission through the ESA TPM Online Dissemination system. The data is freely available to registered EO-SSO users.
DATA DESCRIPTIONESA offers to registered user the access through the Online Dissemination server to the following data collections