IMACS analysis by Lucas-Jessel

My codes and notebooks for the anlaysis of Sentinel1 L1B-XSP IMACS parameter made on internship in 2024.

L1B_data_discover directory

• This directory is my begining with L1B data. It contains an example of a sigma0 map (with the Sentinel1 acquisition geometry) over 1 subswath, 3 subswaths and a whole slice. There is also a Notebook to plot a cross-spectra.
• These Notebooks use the map tools stored in the map_SAR_variables_toolkit directory and taken and adapted from Lisa Maillard's toolkit and also the one_xspectra_plot.py script in the python_script directory to plot the cross-spectra.

L1C_nc_conversion_L1C_csv directory

• Containing all the scripts to convert L1C netcdf (datasets) data into L1C csv data (dataframes) to make the IMACS analysis easier.
• To convert a large amount of netcdf data into csv I used PRUN, a tool to make "embarasingly parallel" calcul on the IFREMER HPC calculator. The PRUN_readme.md explain how to make these massiv conversions step by step. For more information on prun, click here.

df_generation directory

• Containing 4 Notebooks wich generates dataframes, using the L1CConverter in the /L1C_nc_conversion_L1C_csv/l1c_conversion_approp.py script, for 1 subswath, 3 subswaths, one day of data and one month of data.
• These Notebooks are a getting started of the conversion script /L1C_nc_conversion_L1C_csv/l1c_conversion_approp.py before launching the massive conversion on all the data with prun.

python_scripts directory

• containing python scripts required for the IMACS analysis described below.

IMACS analysis Notebooks

• CMOD_NRCS.ipynb : Notebook making a plot of NRCS vs Wind direction for a specified wind speed and incidence using CMOD5 model.
• Macs_analysis_S1__upgrade_plots.ipynb : Notebook of the IMACS analysis on S1A and S1B data separately. Containing, among other things, the iso-density plots of IMACS vs Wind direction for different wind speed ranges and incidences ranges over the 3 subswaths.
• MACS_2nd_analysis_S1b.ipynb : Another IMACS analysis focusing on filtering the data around a GMF of IMACS (not completely finished).
• S1A_S1B_IMACS_mean_analysis.ipynb : Notebook of the IMACS analysis wich make a sensor inter-comparison before merging S1B and S1A data to moke some complementary analysis of IMACS.
• map_sar_IMACS_slice.ipynb : Notebook wich make a map of IMACS (with the Sentinel1 acquisition geometry) over a slice in the Mediterranean sea.