January 10, 2020, 1:29am
i try to generate the DEM following the next steps:
Step7- unwrapping TOPO 20*20
the result is :
and Global Mapper visualization :
what is the error?
January 10, 2020, 5:12am
What is the temporal and perpendicular baseline of your stack?
C-band data rapidly decorrelates over vegetation.
Where is your data located?
Please also read these comments on the limited suitability of Sentinel-1 for DEM generation:
Phase to elevation error
temp is way too long - try 12 days next.
January 10, 2020, 4:49pm
and the baseline is correct?
Somewhat longer would be better.
January 10, 2020, 6:34pm
you can use the ASF Baseline tool to find images with perpendicular baselines (ideally 150-300 meters for DEM generation, but Sentinel-1 doesn’t offer this very often).