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IRS-P4 OCM (Ocean Colour Monitor) Current Status of the Mission OCM is functioning normally and data is received at four ground stations.

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Presentation on theme: "IRS-P4 OCM (Ocean Colour Monitor) Current Status of the Mission OCM is functioning normally and data is received at four ground stations."— Presentation transcript:

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2 IRS-P4 OCM (Ocean Colour Monitor) Current Status of the Mission OCM is functioning normally and data is received at four ground stations.

3 IRS-P4 OCM (Ocean Colour Monitor)  LAUNCH: May 26, 1999 (by PSLV from SHAR, India)  POLAR SUNSYNCHRONOUS (Alt: 720 km, incl: 98 o 28’)  EQUATORIAL CROSSING TIME: 1200 hrs  10 minutes (descending node)  ALONG TRACK TILT :  20 o (to avoid sun glint)  GROUND RESOLUTION: 360 m x 236 m  SWATH :  43  (1,420 km)  QUANTISATION : 12 bits

4 OCM payload : Main specifications

5 OCM data products Level -1: Geo & radiometrically corrected radiances for scenes of sizes (i) ~ 1420 km x 1420 km (ii) ~ 710 km x 710 km (quadrant products) (iii) ~ 100 km x 100 km Level -2: Standard products over the above scenes of (i) Chlorophyll (ii) Suspended sediments (iii) Yellow substance (iii) Diffuse attenuation coefficient (iv) Aerosol optical depth (v) Normalised water leaving radiances (to be incorporated)

6 OCM data products (Contd..) Level -3: Weekly and monthly averages on a trial basis being generated for (i) Chlorophyll (ii) Suspended (iii) Diffuse attenuation coefficient (iv) Aerosol optical depth OCM coverage around India is available for browsing in the NRSA website Level -1& 2 can be acquired by users directly from NRSA on payment The processing s/w developed at SAC is distributed to users for a nominal cost

7 Oceansat II - OCM Will have ocean Colour monitor (OCM) and scatterometer. Proposed launch during 2007. Spectral bands: 8 bands between 400-900 nm. On-board recording for global coverage (1- 4 km). Provision of sun and moon calibration to assess stability of sensor performance. Sun-synchronous orbit with equatorial crossing at 1200 noon.

8 Spectral Bands BandsCentral wavelength (nm) Bandwidth (nm) Application 1234567812345678 412 443 490 510 555 620 740 870 20 30-40 40 Yellow substance absorption Low chlorophyll-a Moderate Chlorophyll-a High Chlorophyll-a Chlorophyll/sediments Sediments Atmospheric correction

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