Currently, I am working on a project of detecting ocean objects using Sentinel-1 data. I am using Doppler frequency analysis to analyze shift of such targets due to relative velocity of Sentinel 1 satellite and target(ship or vessel). So I need to work on a formula. For this formula, I need to know following things -
- Altitude of Satellite (SAR) for given image.
- Incident angle when SAR is looking at particular target (given pixel coordinates of target)
- Satellite to target slant range (in meters)
- Azimuth line heading with respect to north direction
As such number of such targets are larger and I am coding in python, it is best for me to go with SNAP-python API. But I went through API documentation and it is difficult to find require details. It would be appreciated if anyone could help me with this code.