U.S. Department of Agriculture National Agricultural Statistics Service Research and Development Division |
of the Director |
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The Vegetation Condition data
selectable below are updated weekly and arranged by two week composite periods covering
the 1995 - 1999, 2001-2003, and 2004-2008 (as available) crop
seasons. A water vapor correction was applied by USGS to
data collected by NOAA-14 from the 1995 through the 1999 crop season.
Data from subsequent satellites (NOAA-16, NOAA-17) are not water vapor
corrected. Ratio derived products of a specific period to a previous comparable
date period are only created within images of the same satellite.
The NOAA-16 satellite collected images from the 2001 through 2003 seasons.
NOAA-16 started malfunctioning in early 2004, when a scan motor problem
caused a 'barcode' appearance.
Images from the NOAA-17
satellite replaced NOAA-16 starting in 2004. The
USGS released updated calibration coefficients for the NOAA-17 satellite
developed by NOAA after the 2004 growing season. Images available below
from the 2004 - 2008 growing seasons reflect the updated calibration
coefficients.
Animations of these images for a given year reveal how the vegetation
condition changed during that growing season.
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NOAA-17: | 2008 | 2007 | 2006 | 2005 | 2004 |
NOAA-16: | 2003 | 2002 | 2001 | ||
NOAA-14: | 1999 | 1998 | 1997 | 1996 | 1995 |