Local incidence angle (SAR grid)

Microwave Toolbox
#1

Usually I use the Terrain Correction operator to get local incidence angle but this time I need it in the original SAR grid. Is there a way to do it in SNAP?

Thanks in advance.

#2

I don’t have a solution but maybe a hint: You can, in a first step, download the DEM in slant range geometry by right clicking on the band > Add Elevation band.
You would then be able to derive it based on elevation and the incidence_angle tie-point grid somehow in the band maths operator but I don’t know the formula either.

grafik.png1920×940 326 KB

Incident angle of each pixel of Sentinel - 1A
S1 radiometric correction
#3

Thks @ABraun

I think an option to do this would be a good improvement to SNAP (@lveci)

Meanwhile I will manage to get the local incidence angle in the SAR grid by using the Terrain Correction operator and the Colocation operator.

#4

The terrain flattening operator internally calculates the local incidence angle in SAR geometry. At the risk of confusing users, it could produce this as a band or maybe it’s best to create another operator.

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