Hi, I’m a beginner in satellite image analysis. I want to know the lat/lon coordinates of some bursts of a sentinel-1 image. I looked at the file names of the downloaded zip, but couldn’t find any promising files(attached: file structure). Can someone teach me how I can obtain them?
Context: My purpose is to generate a coherence image and project to QGIS. I used SNAP following up to p12 of this tutorial(https://step.esa.int/docs/tutorials/S1TBX%20TOPSAR%20Interferometry%20with%20Sentinel-1%20Tutorial_v2.pdf). but the coordinates were somehow lost from the first step(importing and choosing bursts so as to produce a split file). not sure why but it apparently happens with other satellites(https://earthenable.wordpress.com/2016/11/21/how-to-export-sar-images-with-geocoding-in-esa-snap/). I was able to produce the coherence without coordinates, so i’m thinking if I can get the coordinates from the sentinel file, I can just add it to the geotiff myself.
I also want to ask, is this idea wrong? are the sentinel coordinates different from the coherence image as it undergoes back geocoding?
Following that tutorial you've mentioned here, I would rather go to Page 21 and upon doing that I would export the image as GeoTIFF (Big TIFF)?
I am not really sure which SAR data you're using but these may be useful:
1. https://asf.alaska.edu/how-to/data-recipes/create-an-interferogram-using-esas-sentinel-1-toolbox/
2. https://forum.step.esa.int/t/which-projection-systems-do-sentinel-1-2-and-3-have/29986
Best wishes.
Maybe you should study the SENTINEL-1 PRODUCT DATA TYPES.
Candidate Reference:
https://sentinel.esa.int/documents/247904/1653442/Guide-to-Sentinel-1-Geocoding.pdf
Regards,
- Badges
- Science topic
- Similar topics
- Phytochemistry
- Extracts