Note: VH product was produced by using VIIRS NOAA20 (J01) data only since week 30 of 2022. click here for detail.
STAR - Global Vegetation Health Products : Introduction
Global and Regional Vegetation Health (VH) is a NOAA/NESDIS system estimating vegetation health, moisture condition, thermal condition and their products.
It contains Vegetation Health Indices (VHI) derived from the radiance observed by the Advanced Very High Resolution Radiometer (AVHRR) onboard afternoon polar-orbiting satellites: the NOAA-7, 9, 11, 14, 16, 18 and 19 and VIIRS from Soumi-NPP satellite.
The VH products from AVHRR were produced from the NOAA/NESDIS Global Area Coverage (GAC) data set for the period 1981 to the present. The data and images have 4 km spatial and 7-day composite temporal resolution.
VH products from VIIRS were also processed from 2012 to present (1km resolution, 7 day composite).
The VH products can be used as proxy data for monitoring vegetation health, drought, soil saturation, moisture and thermal conditions, fire risk, greenness of vegetation cover, vegetation fraction, leave area index, start/end of the growing season, crop and pasture productivity, teleconnection with ENSO, desertification, mosquito-borne diseases, invasive species, ecological resources, land degradation, etc.
The following indices and products are available:
- Vegetation Health (VHI)
- Vegetation Condition Index (VCI)
- Temperature Condition Index (TCI)
- Soil Saturation Index (SSI)
- No noise Normalized Difference Vegetation Index (SMN)
- No noise Brightness Temperature (SMT)
- Fire Risk Index (FRI)
- Drought (D)
- ENSO/Land Ecosystem Interaction
- Time Series
- Start of the growing season
- Ecosystem Resources
Vegetation Health, Drought, Moisture Conditions, Thermal Conditions,Soil Saturation, NDVI, Brightness Temperature, Fire risk, Ecosystem Resources
From September 1994 through February 1995, data were not available.