Blended-VHP

Description: Blended-VHP is a re-processed Vegetation Health data set derived from VIIRS (2013-present) and AVHRR (1981-2012) GAC data.

The images are color-coded maps showing vegetation health using Vegetation Health (VH) Indices, ranging from 0 (poor) to 100 (excellent). Green represents fair conditions, with brown and red for worsening and blue for improving. VH measures changes in vegetation based on chlorophyll, moisture, and surface temperature, helping detect drought early. Values below 40 indicate stress, making VH useful for monitoring drought impacts on vegetation and crops.

Organization: NOAA

Website: https://www.star.nesdis.noaa.gov/smcd/emb/vci/VH/vh_ftp.php

Spatial Resolution: 4 -km (0.036-deg)

Time Span: 1981-08-27 to present, weekly data, updated weekly

Variables:

• Smoothed NDVI (SMN)
• Smoothed Brightness Temperature (SMT)
• Vegetation Condition Index (VCI)
• Temperature Condition Index (TCI)
• Vegetation Health Index (VHI)