Global Monthly Vegetation Cover3rd Generation C-levelNDVI Imagery Collection |
The following section contains images of twelve years of Third Generation C-level scaled Normalized Difference Vegetation Index (NDVI) data (from April 1985 through December 1997) arranged in a matrix of four rows by four columns. Note: there are four months of data (between October 1994 and January 1995) that are unavailable. During this period of time, the NOAA-11 AVHRR failed in September 1994 and NOAA-12 AVHRR data were substituted, but the data were later deemed unsatisfactory since they were generated from a morning polar orbiter with a low sun elevation angle. This situation was corrected with the launch of NOAA-14 in late 1994. NOAA-14 was an afternoon polar orbiter and was well suited for the generation of Global Vegetation Index data.
These data are displayed using the Plate Carrée (a rectangular latitude/longitude equal angle) projection. Detailed information regarding the Third Generation C-level NDVI data can be found in the NOAA Global Vegetation Index User's Guide. If a user wants to visually examine a specific year in detail, they can click anywhere in the box containing that year and display a screen containing all the thumbnail images for that year. A full image for each month can be obtained by clicking on a specific month's thumbnail. The corresponding digital dataset name for each image is indicated at the top of the full image screen and the actual data are available in the "ndvi-12/data/digital" directory on this CD-ROM. [Links have been disconnected for all years except 1985.]
Apr - Dec 1985 |
Jan - Dec 1986 |
Jan - Dec 1987 |
Jan - Dec 1988 |
Jan - Dec 1989 |
Jan - Dec 1990 |
Jan - Dec 1991 |
Jan - Dec 1992 |
Jan - Dec 1993 |
Jan - Sep 1994 |
Feb - Dec 1995 |
Jan - Dec 1996 |
Jan - Dec 1997 |
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