Sentinel-1 Back Geocoding

tanloi10081997 · January 14, 2021, 1:00am

Hi ABraun,
Thank for reply. I tried switch to SRTM 1Sec HGT (AutoDownload), but it was erro: Java.io.IOException: DimapProductReader: Unable to read file “…”. I am researching to Land subsidence in Mekong Delta in VietNam.
Tan Loi

tanloi10081997 · January 14, 2021, 1:56am

I tried runing each photo individually, Only erro date: 12/03/2017, 20/09/2017; 14/03/2019.
I don’t know something happen, can you help me?
Thanks.
Tan Loi

ABraun · January 14, 2021, 6:56am

Single products as inputs don’t make much sense, you need at least two products.
I can’t tell why some dates fail, do the others work? Have you checked the result of those who worked with an RGB image?

adama15 · January 21, 2021, 5:12pm

Hi everyone, back geocoding takes how long normally. I’m at 1% almost 40 min. I only have three bursts. I’ve done 30 minutes with SRTM 3sec ( Auto Download). I’ve changed to SRTM 1sec HGT (Auto Download). Thank you

ABraun · January 21, 2021, 5:16pm

please delete the downloaded DEMs in the aux folder and run again with SRTM 1Sec.

adama15 · January 21, 2021, 5:29pm

I have deleted and start. it tells me that it exists in the chosen folder. but not in product explorer. photo in pj

ABraun · January 21, 2021, 5:53pm

no image data has been written, you can select “Yes” to overwrite the product.

tanloi10081997 · January 25, 2021, 1:29am

Thanks ABraun. I have finished
TLoi

Shadi1 · April 2, 2021, 5:09pm

I have the same error, I have tried to reduce the number of bursts and change the DEM but the warning doesn’t disappear. I tried a different image pair and no error popped up

ABraun · April 2, 2021, 5:41pm

as stated in the error message, one image needs EAP correction.

Shadi1 · April 2, 2021, 5:52pm

Yes, but how can I perform the EAP correction? I never came across this issue before

ABraun · April 2, 2021, 6:19pm

grafik

Parisa · December 26, 2021, 2:43pm

Hi ABraun,
Thanks for your good explanation.
I also have this problem and I chose the option “SRTM 1Sec HGT (Auto Download)”. How should I solve this now?

ABraun · December 26, 2021, 2:47pm

Please see this FAQ entry: A process related to digital elevation models is taking forever to finish
Especially the point about the deletion of corrupt files could help.

lidehua · May 24, 2022, 3:24am

Hello @ABraun When I run back geocoding, the DEM I selected is SRTM 1Sec HGT , but when I check Abstracted_Metadat, it seems that the DEM is not there, is this normal?

ABraun · May 24, 2022, 12:30pm

yes, I’d say so. It is used for the task, but not physically added to the product. You could later on add it via right click > Add Elevation Band