About OceanSat-2
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 |
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.
|
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 |
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 DOWNLOAD
Download data from Oceansat-2 mission through the ESA TPM Online Dissemination system. The data is freely available to registered EO Sign In users.
DATA DESCRIPTION
ESA offers to registered user the access through the Online Dissemination server to the following data collections
- OceanSat-2 NRT data: All passes over Neustrelitz are every day acquired, systematically processed to Level 1B, 2B and 2C, and made available in NRT