Abstract:
Sea ice concentration observational data from the FNMOC Ocean QC (Quality
Control) process are posted in near real-time to the USGODAE server. These
files contain all of the unclassified in-situ data used to initialize the US
Navy NOGAPS model, and all of the climate and background (forecast) values used
in the QC process.
The sea-ice concentration retrievals
... were obtained by the Special Sensor
Microwave/Imager (SSM/I), which is an instrument carried by the Defense
Meteorological Satellite Program (DMSP) series of satellites. The SSM/I is a
seven-channel, four-frequency, linearly polarised, passive microwave
radiometer. The fundamental quantity measured is the total power received by
the radiometer, which can be converted to the antenna temperatures and
brightness temperatures. The sea-ice concentration is calculated from the
brightness temperatures. 
