Why didn't I have a good result after the coregistration?

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#1

配准2.png872×151 8.82 KB
配准1.png588×758 303 KB

data:ers2 N1 PRI
I got a pair of subsets from the main images.The modeled coherence of image pair is only 0.54.I want to do D-insar.After the coregistration,when I inspected the result of coregistration,the corresponding points had a distance.It didn’t work. In the processing of coregistration, I purposely adjusted the coherence threshold to a low level for a useful result.But it seemed lost some information.The interferometric couldn’t form.Was some thing wrong with it?

#2

This doesn’t look like complex data (i,q) needed to do InSAR. Please
make sure you are using SLC products.

#3

So you meant that a sar image including i and q information is necessary .I know little about the N1 format.Do you know what can I do with this kind of images which have amplitude and intensity information ,either?Hoping for your reply,Iveci.Thanks!

#4

First apply precise orbits and calibrate the products. With a
coregistered PRI products, you can only work with the amplitudes and
possible see the difference between the two dates.

#5

Thanks for your suggestions,Iveci.