AnsweredAssumed Answered

Converting Radar DN to Backscatter

Question asked by Venusian on May 12, 2015
Latest reply on May 13, 2015 by Venusian

Hello everyone!


I'm working with Venusian Magellan radar, and I need to convert the pixels from DN values into radar backscatter coefficients (Sigma-naught).  I attempted to use the Radar Calibration Function, but it would seem that the particular function only works for RADARSAT-2 data.  I encountered the following error:  "The function could not be inserted.  The input or output arguments are invalid."


I was wondering if anyone else has devised a way to convert radar DN pixels into backscatter through other methods.


The equation I require, specifically for Magellan data, is as follows:


Sigma Nought = 100.1[–20+(DN–1)/5]*[(0.0118 cos(phi+0.5))/[sin(phi+0.5)+0.111 cos(phi+0.5)]^3]


where phi is the incidence angle, dependent on latitude, but ultimately will be sourced from a table.


Any suggestions?


Thank you!