Greenness of the Conterminous U.S.
Greenness Home | What's New | What is NDVI | What is AVHRR | View Images | Products/Services | Links | Contact Us |
Products & Services
All of the AVHRR time-series products are maximum-value NDVI ("greenness") composites, which are based on a time series of daily calibrated and georegistered AVHRR observations. Maximum values for each location have been combined to obtain a nearly cloud-free coverage.
The following products are available for the conterminous United States:
There is also a twice-monthly composite available for Alaska.
NDVI composites are available from January 1989 to present. Current composites are available via FTP only. Recent composites (<1 year) are generally available as 8 mm tape, and older composites (>1 year) are available on CD.
The data product includes all acquired AVHRR bands, NDVI, satellite zenith, solar zenith, relative azimuth, atmospherically corrected with water vapor and ozone channels 1 & 2, qc band, and acquisition date. Projection is Lambert Azimuthal Equal Area for the U.S., and Albers Equal-Area Conic for Alaska. Resolution is 1km, and the data is in a binary 8-bit raster format.
Contact Customer Services for further information and pricing.