IMOS - Satellite Remote Sensing - SNPP - 01 day - Chlorophyll-a concentration (GSM model)

Name: IMOS - Satellite Remote Sensing - SNPP - 01 day - Chlorophyll-a concentration (GSM model)
Creator: IMOS
Published: 2025-02-07
License: Creative Commons Attribution 4.0 International License

Updated: 2026-06-30

The SNPP satellite platform carries a VIIRS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the concentration of chlorophyll-a (Chl-a), most typically due to phytoplankton, present in the water. There are multiple retrieval algorithms for estimating Chl-a. These data use the Garver-Siegel-Maritorena (GSM) method implemented in the SeaDAS processing software l2gen and described in “Chapter 11, and references therein, of IOCCG Report 5, 2006, (http://ioccg.org/wp-content/uploads/2015/10/ioccg-report-05.pdf).