TopSAR Processing

Microwave Toolbox Interferometry
162

Thank you! I got it already! I did single-click only before that’s why the distance did not appear.

I have another concern. I’ve searched through this forum the answer but I failed to get a good explanation because I think it is a different one.

I want to ask if it’s possible to merge two ‘debursted’ Sentinel-1 products?

My products are like these:

S1B_PATH61_FRAME470_DEB
S1B_PATH61_FRAME475_DEB

I wanted to merge these two ‘debursted’ products both from S1B-Descending Orbit (same path 61 but with different frames 470 and 475). I do get the error as shown in the image below.

Merge
Merge.png749×488 17.6 KB

My AOI is covered within these products.

Please help.

Thank you!

163

Please take a look at the following post

Source of the post

165

Iam new in radar interferometry .Ihave two slc images at 1-12-2017 and 20-12-2018 and Iwant to detect the subsidence in my region through this period.Ido an interferogram with SRTM 1Sec Auto Download but the interferogram still blue,please help me.

Thank you very much

166

first of all, have you checked if the coregistration worked? Are both images in the stack aligned correctly? You can check by creating an RGB (explained here)

What TOPSAR data are you using exactly?

Where is your study area located?

167

Thank you very much
for your kind reply @ABraun

168

Hello, Ihave two slc images at 20-12-2018and 19-2-2019,my area of study is syria and my data is IW-SLC, Iwant to detect the subsidence in my region through this period , but when Iam processing with phase unwrapping via SNAPHU ,the result was this.

image
Please help me.

169

you need to enter the entire command, not just “snaphu”
You find the command in the snaphu.conf file in the exported folder.

170

Idid this ,but I got the same result:line length must be positive integer
what is meaning this?
is it related with low coherence?
please help me

171

image
image2148×1080 470 KB

172

there must me a number at the end of the snaphu command which needs to be included for the processing.

What command did you enter?

173

image
image1920×1080 271 KB

thank you for your help
@ABraun

174

Have you considered multi-looking before unwrapping to reduce the size of the data?

I think it you correctly enter the command with the number of lines at the end, the error you showed should not appear.

175

No,Ido not apply multi-looking. I will this
another quistion please, if I have low coherence,can i continue with processing 0.2>coherence.
thank you very much in advance.

176

you can technically continue but your results will be bad. Make sure you have the shortest temporal baseline possible. But over vegetation, this will not bring much improvement.

177

Futher to disturb ,how to choose and check pixel value,thanks

178

The value can be read in the Pixel Info tan or selected with the Mask Manager

179

Hello,during steps of processing in coregistration and interferogram formation I have message:
image
and in step tops deburst the result was:
image
please help me…thank you very much

180

Hello,during steps of processing in coregistration and interferogram formation I have error:
image
and in step tops deburst the result was:
image
what is meaning this?
image1 is slc-iw-2-4-2020
image2 is slc-iw-20-4-2020
please help me @ABraun …thank you very much

181

I see no clear error source in the screenshots. Did you follow the tutorials?

182

thank you ABraun for your reply
please, I want to understand how calculate (coregistration ,interferogram,displacement,phase unwrapping) in snap
I mean mathimatical relathions because I want to develop or add a tool to snap
do you help me?
thank you in advance