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07/26 - 08/08/2002

COMPARABLE 2001 PERIOD: 07/27 - 08/09/2001

NDVI data calculated from the AVHRR sensor on the NOAA-16 satellite are used to create vegetation condition imagery beginning with the 2001 crop season. The images selectable below include displays of the NDVI index for various US areas and ratio images showing NDVI from this period in 2002 divided by NDVI from the comparable 2001 period. Agricultural Statistics District (ASD) and/or county boundaries are shown where the resolution allows. Thumbnail images, which start when at least eight prior periods are available, allow season to-date review. US images with average first frost isolines overlaying NDVI or Ratio to Previous Year data are available starting with the period containing September 1st. A thumbnail overview image showing all images for this selected period is also available. Select a GIF or PDF image to view from the tables below. Images are in GIF format unless otherwise noted.

Biweekly NDVI Displays:
2002 Continental US US w/Average 1st Frost 9 Period US Thumbnail
2001 Comparable Period KS/OK '02 & '01 ND/SD/NE '02 & '01
IL/IN/IA/MO '02 & '01 WA/OR/ID '02 & '01 Southeast US '02 & '01
CA/NV '02 & '01 Miss. Delta '02 & '01 Texas '02 & '01
Northeast '02 & '01 Southwest '02 & '01 Florida '02 & '01

Ratio Comparison to Previous Year, in Percent:
2002 Continental US US w/Average 1st Frost 9 Period US Thumbnail
TX/LA Northeast Southwest

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(PDF Format)
Biweekly NDVI Ratio/Previous

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