geometrical coherence in Network.py

[rainxinyucao]

Hello, what is the physical meaning of geometrical coherence in Network.py? Unable to download relevant literature, do not quite understand the meaning of this variable。
Thanks.

[scottstanie]

Hi, here is the most common reference talking about that:

Decorrelation in interferometric radar echoes
HA Zebker, J Villasenor

The relevant equation:

This is decorrelation coming from the separation of the two satellites (hence the "geometry" of the interferogram network).

• $R_y$ is the range resolution (or range spacing below)
• B is the spatial baseline
• $\theta$ is the incidence angle
  corr = 1.0 - 2*B*rangeSpacing*((np.cos(theta))**2)/wvl/r

[rainxinyucao]

I am very happy to receive your reply. I have been working on the calculation of some baseline coefficients through code recently, and your answer is very helpful to me.Thanks！