CNES/swot_simulator

Orbital error generation is too high?

jesscag opened this issue · 1 comments

After generating a swath based on the example and using the build in AVISO sample data I noticed that the orbital noise added to the swath is far too high.
image
The left hand image is the 'truth' from the product.simulated_true_ssh_karin and the right hand image is karin SSH with all errors/noise generated product.ssh_karin
These swaths were generated using:

configuration = swot_simulator.settings.template(python = True) 
parameters = swot_simulator.settings.Parameters(configuration) 
parameters.ssh_plugin = swot_simulator.plugins.ssh.AVISO(swot_simulator.DATA) 

After removing the orbital noise error and utilizing the corrected roll the swath looks much more realistic
image
Where the left is truth and the right is product.ssh_karin
These swaths were generated using:

configuration = swot_simulator.settings.template(python = True) 
parameters = swot_simulator.settings.Parameters(configuration) 
parameters.ssh_plugin = swot_simulator.plugins.ssh.AVISO(swot_simulator.DATA) 
parameters.noise = ['Altimeter', 'Karin', 'BaselineDilation', 'WetTroposphere', 'Timing', 'CorrectedRollPhase'] 

When looked at alone, the swath with only orbital error looks like:
image

Is it possible I am implementing this error wrong or is the signal from this error too strong?
Thanks!

I also encountered the same problem, and after removing the orbiral error, the roll error is still quite large. How do you solve this?