Dear team,
I would like to ask for some clarification about the ETAD correction provided in SNAP.
I’m interested in the benefits of using ETAD for my interferometric applications. I would like to improve coregistration and apply atmospheric removal.
I’ve carefully read the documentation and papers about it, and from my understanding it can be principally applied for:
-
geometric correction (to improve for example coregistration)
-
interferometric correction (for example for APS removal from a single interferogram)
I’ve attached the SNAP panel which allows the user to apply the ETAD correction.
My question is:
why are the two options mutually exclusive? Meaning, why can we only perform one of the two?
Or does the resampling image also modify the phase and correct it for later interferometric application?
If this is so, I have read and verified that, for interferometric application, the tropospheric correction must in turn be corrected depending on the height of the projected DEM.
does SNAP also account for this?
Thank you