MODIS (Aqua/Terra)-Image Processing (2)
continues from previous entry...http://ajiputrap.blogspot.com/modis-image-processing.html
" temperature brightness " or " temperature brightness value "
Aqua MODIS image processing for sea surface temperature using two bands : band 31 and band 32 (that have processed for corrected radiance value).
We need to convert radiance value both bands (31 and 32) to Brightness Value using “Planck”:
Tb = c2/(Vi * ln (c1/(Vi5 * radiance) + 1))
where Tb = Brightness Value (K),
c1 = Constanta radiance (1.1910659x108 [W m -2sr-1 (µm-1 )-4 ])
c2 = Constanta radiance (1.438833 x 104 [K µm])
Vi = central wavelength
below are table for central wavelength - Aqua/Terra MODIS Bands..
For AQUA MODIS =
Band 20 : 3.7803
Band 22 : 3.9720
Band 23 : 4.0617
Band 31 : 11.0263
Band 32 : 12.0424
For TERRA MODIS =
Band 22 : 3.9719
Band 23 : 4.0567
Band 31 : 11.0073
Band 32 : 12.0020
-----------------------------------------------------------------------------------
nice to share
Aji PP
|
|
|---|
