In the SiteDescription.txt file, I have observed a value for ‘AcqHeading’. I believe this as the heading or azimuth angle of the satellite. If so, is it calculated positive with respect to the geographic north?
For a particular S1 dataset acquired in ascending mode (track 72 over Iran), ESA SNAP software shows platform_heading_angle = -129.6 deg whereas for the same dataset SARPROZ shows AcqHeading = -169.6 deg. I do not know why they are different. Please clarify.
try to draw the angle to the piece of paper. You will realize that the value -129.6 deg is not the heading of the satellite track, while the value from SARPROZ is really heading angle of the satellite from the North (azimuth angle).