IRS-P4 OCM data has been found useful for change analyses. Ocean parameters for the state of Orissa and adjoining parts of Bay of Bengal. IRS P-4 OCM payload is optimally designed for estimation of chlorophyll and suspended sediment in coastal waters. The payload consists of 8 narrow bands out of which 6 are in the visible spectrum and two in the NIR (near infrared) region. The large spectral channels in the 8 band also facilitate devising land indices like NDVI, which is helpful in change analysis. The super cyclone that hit Orissa on Oct, 27th, 1999, has brought drastic changes widely through out the coastal districts and in order to monitor the changes that occurred before and after the event. The current study has been done using the IRS-P4 OCM (Ocean Colour Monitor) imageries. IRS-P4 is the first in the series of operational ocean remote sensing satellites and was launched by PSLV on 26th May, 1999. The field of view of the optics is 43 degrees providing a swath of 1420 km from 720-km altitude.
 

VEGETATION CHANGE ANALYSIS

COASTAL WATER CHLOROPHYLL ANALYSIS

COASTAL WATER SUSPENDED MATTER ANALYSIS