DEM generation2

Microwave Toolbox
1

hi

i try to generate the DEM following the next steps:

Step1–OpentheProducts
Step2–ViewProducts
Step3–Viewa Band
Step4–Co-registerthe images
Step5–FormtheInterferogram
Step6– TOPSDeburstStep9–PhaseFiltering
Step7- unwrapping TOPO 20*20

the result is :

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31697×771 460 KB

and Global Mapper visualization :

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91915×809 965 KB

what is the error?

2

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

3

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71079×582 14.7 KB

Mexico City is the zone

4

Btemp is way too long - try 12 days next.

5

and the baseline is correct?

6

Somewhat longer would be better.

7

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). https://baseline.asf.alaska.edu/#/baseline