Just to make explicitly clear when EAP procedure should be done?
I follow the standard way in processing SAR for interferogram - Split->Orbits->Cregistration->ESD…
I’m asking this since I’m in vicious circle - the EAP module says the EAP has been already preformed, while the Interferogram module says one of the products is not EAP corrected.
The pair I’d like to use is:
both downloaded from ASF.
@Joaquin - Thank you for your reply. My question concerns usage of SNAP software - when should EAP be used.
Hello again Hriston:
Let´s see if this answer your question:
Top read should be your 20150127 image and Read(2) the 20150912 image. You can modify the later as you want (ESD, Topophase removal, etc…).
@Joaquin - Thank you!! I’ll try it and inform about the results.
you mean we shoud do eap phase correction and also coregistration with esd for those images?
@survivere13 I’d suggest to aplly EAP procedure after Split and Apply Orbit BEFORE co-registration
would you please take a look at this? is it true? should i use it just for 2015 and before 2015 images?
@survivere13 The graph you show is too heavy for ordinary desktop/laptop. I see you need to process three IWs at once, but most probably you will need a lot of memory (> 64GB RAM).
With regard to EAP it is at place. As far as I know EAP is needed for images from the interval Nov2014-Apr2015 so the graph you posted is too specific.
Moreover I found this:
Generally users do not need to run this operator if they do not need to review the azimuth shift values. They can run the S-1 Enhanced Spectral Diversity operator directly where the azimuth shift is estimated using EDS and used directly in the azimuth shift correction.
I hope if you explain your task the support from the forum users will be most topical.
hi, thanks a lot for your explanation, i’m gonna study land subsidence using PSI method on a region which is in both IWs, my superviser asked me to do the process for whole image.
so what should I do? should I just split it step by step? I’m a bit worried I get confused about IWs!
thanks for EAP explanation, what about ESD? Is it necessary for all images or it’s for nov2014-apr2015 too?
I’m sorry i don’t have much information about steps
EAP is only for the images nov2014-apr2015
ESD is must for obtaining good interferogram (IF)
With regard to IWs - select only the ones you need e.g. 1-2 or 2-3, process separately and after filtering merge the IWs
I’m nit sure if you could apply PSI with SNAP - search the forum for the workaround. Please notice PSI is not trivial task and will take time.
thank you so much it was really helpful