Sea ice products from the Moderate Resolution Imaging Spectroradiometer (MODIS) include level 2 swath data and level 3 gridded day and night composites, at 1 km resolution. Level 3 products consist of tiles of data, approximately 1200 km by 1200 km in area, gridded in a Lambert Azimuthal Equal-Area (EASE-Grid) projection. The sea ice algorithm uses a Normalized Difference Sea Ice Index (NDSI) and ... other criteria to distinguish sea ice from open ocean, based on reflective characteristics.
The level 3 day product (MOD29P1D3) contains the following fields: Sea Ice by Reflective Characteristics, Sea Ice by Reflective Pixel Quality Assurance (QA), Ice Surface Temperature (IST), IST Pixel QA, Sea Ice by IST, and Combined Sea Ice. The data also contain local and global metadata. Latitude and longitude geolocation fields are at 5 km resolution, while all other fields are at 1 km resolution. Sea ice data are in HDF-EOS format and are available by ftp. MODIS sea ice products are considered provisional at this time. Product quality may not be optimal, and incremental product improvements are still occurring.
This data set represents Version 3 (V003) of the MODIS processing scheme. The V003 collection contains reprocessed V001 data from 5 March 2001 onward and V003 data from 24 May 2001 onward. V003 data contain processing refinements accommodating algorithm, instrument and calibration stabilization. V003 start dates will continually shift to earlier dates as V001 data are reprocessed to V003. After V003 data are generated for a given day, the V001 data for the same day will still be available for ordering through the EOS Data Gateway (EDG) for at least six months. Eventually, V003 data will completely replace V001 data.
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Province or State:
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