ALOS PALSAR CEOS data processing in SNAP

Preethi_Balaji · May 1, 2018, 10:16am

Hello all!
I have processed ALOS PALSAR CEOS data in SNAP and also in SARscape. I am making a comparison of the pixel values between the two processed products and there is a significant difference given the same image over a same area of interest.

I would like to know what are the calibration settings in the SNAP and does it modify the pixel values by adding its own calibration constant!

Any help/suggestions is highly appreciated!

Thank you!

ABraun · May 2, 2018, 8:51am

I guess the radiometric claibration of ALOS data in SNAP is using the equations and constants which were officially released by JAXA:

ALOS PALSAR: http://www.eorc.jaxa.jp/ALOS/en/doc/fdata/PALSAR_x_Format_EL.pdf (page 3-68)
ALOS-2: http://www.eorc.jaxa.jp/ALOS-2/en/calval/calval_index.htm

Preethi_Balaji · May 5, 2018, 5:23pm

Thank you!