On Tuesday, December 6 at approximately 11 a.m.EST (1500 UTC), a planned web system upgrade will be performed. This will result in a brief delay of data on the GOES, SPSD and OSPO web sites for up to two hours. Some data will take longer to recover. Please see the related message, which has additional details, and watch http://www.ssd.noaa.gov/PS/SATS/messages.html for additional information.
MODIS / Terra NASA L2gen NIR Ocean Color Products (Backup)
The MODIS/Terra ocean color products are our backup products since the sensor has serious calibration problems. The ocean color products are derived by using the NASA L2gen SeaDAS codes based on Near-Infrared (NIR) atmospheric correction algorithm. The products include chlorophyll concentration and remote sensing reflectance at 667 nm over Gulf of Mexico (GOM) and Hawaii (HI).
Chlorophyll concentration provides an estimate of the live phytoplankton biomass in the surface layer. It is also referred to as the amount of the green pigment chlorophyll. The chlorophyll anomaly is generated when today's chlorophyll concentration data is compared to the bi-monthly mean. A positive anomaly indicates new algal growth. Bi-monthly mean values are averages calculated over 61 days.
Chlorophyll Concentration (Chl-a): Daily Mean