• National Snow and Ice Data Center (NSIDC)
• NASA Goddard Space Flight Center (GSFC)
• Special Sensor Microwave/Imager (SSM/I)
• Defense Meteorological Satellite Program (DMSP)
• DMSP SSM/I F13 data description 
• sea ice data ftp site (directory /pub/DATASETS/SSMI/)
• Oregon State University Remote Sensing Ocean Optics (ORSOO)

Webpage by Jasmine S. Bartlett, Oregon State University.