Sentinel-2_proc_code.md

S2 Processing

• Use manglillo
• Can't use ocssw
• Use C2RCC instead

Band wavelengths for S2 A and B:

        S2A    S2B

Lambda(1) = 443 442
Lambda(2) = 492 492
Lambda(3) = 560 559
Lambda(4) = 665 665
Lambda(5) = 704 704
Lambda(6) = 740 739
Lambda(7) = 783 780
Lambda(8) = 835 835
Lambda(9) = 865 864
Lambda(10) = 945 943
Lambda(11) = 1613 1611
Lambda(12) = 2200 2184

Vicarious calibration on S2A only (for now).

Processing Scheme (updated September 2024)

1. API call to get images (can we filter by tileID and cloud%?)
2. Subset to ROI (not really needed; tiles are small)
3. l2gen will not work for now (formatting issue)
4. Use C2RCC instead

• Graph node 1: subsample to 20m (could try 10m, but makes files REALLY large)
• Graph node 2: C2RCC

5. Prods? - conc_chl, conc_tsm, iop, etc. (limit output as needed - files get BIG)
6. Questions:
   • Can we filter file orders by tileID and cloud%?
   • How to handle ancillary data? (must use TOMSOMI and NCEP data from NASA; dead link) - Use default for now
   • Flag use? (clouds, cloud shadow, straylight)
7. Analysis:

• Extract in small areas (offshore, reef, canals, backcountry)
• Can add bandmaths operator and add calculated product(s) - Chl, TSM, other "indices"