LOS azimuth angle HyP3

[JOSUÉ CASADO RABASCO]

Hi, I'm wondering if the LOS azimuth angle (optional) is the one that HyP3 calls lv_phi. Its definition is the following:

"The lv_phi (φ) map indicates the SAR look vector orientation angle at each pixel, ranging from 0 (east) to π/2 (north). The look vector orientation angle is defined as the angle between the East direction and the projection of the look vector on the horizontal surface plane. The orientation angle increases towards north, with the North direction corresponding to π/2 (and south to -π/2)."

Moreover, there are other files produced by HyP3 called incidence angle maps:

"the local incidence angle is defined as the angle between the incident radar signal and the local surface normal."

Are these useful for Mintpy?

Thanks,

Josué

[Eric Fielding]

The GAMMA software does write out two angles to specify the look vector (lv), but the angles are measured differently from the ones used in MintPy, so you need to do some calculations to convert to the MintPy conventions.

[Joseph Kennedy]

Yes, in your MintPy config, you'll want to set the azAngleFile as the lv_phi HyP3 files. Likewise, the incAngleFile would be the lv_theta files. 

The HyP3 processor for MintPy handles any needed conversions. 

There's an example of a creating a MintPy config for HyP3 products in HyP3 MintPy Tutorial:
https://hyp3-docs.asf.alaska.edu/tutorials/mintpy#3.2-Create-the-MintPy-config-file

Cheers, 

Joe

[JOSUÉ CASADO RABASCO]

Ohh, thanks Joe. That's perfect!

Cheers,

Josué