NOAA Office of Satellite and Product Operations

Vegetation Products

    Operational Products
Vegetation Health Product (VHP)
The Vegetation Health Product (VHP) consists of gridded weekly global vegetation indices (VCI, TCI and VHI) derived from AVHRR GAC orbital data for the global area between latitude 55°S to 75°N. The projection of VHP is Plate Carree (also called geographic projection or equal latitude-longitude interval grid). The interval of grid is 0.036° (about 4km at equator). Noise is minimized by applying the time series smoothing technique and other correction algorithms. Details on the algorithm can be found at Algorithm Description

Products include:
• Temperature Condition Index
• Vegetation Condition Index
• Vegetative Health Index
• Normalized Difference Vegetation Index
• Brightness Temperature
• TIF Files on FTP Server

VHP example image

POES Resolution: 4 Km Frequency: Weekly
Global Vegetation Index (GVI)
The third generation polar Global Vegetation Index (GVI) products are used for monitoring the density and vigor of green vegetation. Useful applications of GVI products include classifying land cover, estimating crop acreage, and detecting plant stress. The GVI operational products are weekly composites, and have a resolution of about 16 km. A comprehensive description of GVI products may be found at the national Climatic Data Center's NOAA GVI Guide.

Products include:
• Normalized Difference Vegetation Index (NDVI): a calculation of the differences between AVHRR channels 1 and 2
•  Fractional Vegetation: NDVI displayed as a fraction
• Precipitable Water Index: a measurement of how much water vapor is in the atmosphere

GVI example image

POES Resolution: 16 Km Frequency: Daily and Weekly
Metop Global Vegetation Index (MGVI)
The Metop Global Vegetation Index (MGVI) product is used for monitoring the density and vigor of green vegetation. Useful applications of GVI products include classifying land cover, estimating crop acreage, and detecting plant stress. The weekly composite Metop Global Vegetation Index (MGVI) is derived from MetOp AVHRR global 16 km FRAC data. When the daily map is created, the most nadir pixel is selected. The weekly composite product is created from daily maps of 7 days on pixel basis by selecting the data of the day with Maximum NDVI.

Product:
• Normalized Difference Vegetation Index (NDVI)

MGVI example image

POES Resolution: 16 Km Frequency: Daily and Weekly
Global Vegetation Processing System (GVPS)
The Global Vegetation Processing System (GVPS) is designed to generate global vegetation health and vegetation fraction products based on weekly GVI data. The GVPS delivers an integrated software application system that is capable of full automation in operation and provides customized user control through the application GUI towards the generation of real time weekly land surface NDVI, Green Vegetation Fraction (GVF), and vegetation health products. The primary product of this system is GVF. The secondary products are drought mornitoring indices including weekly Vegetation Condition Index (VCI), Temperature Condition Index (TCI), and Vegetation-Temperature Index (VTI) or the so-called Vegetation Health (VH) Index. Other intermediate products include Smoothed NDVI SMN) and Smoothed Temperature (SMT).

Products include:
• Green Vegetation Fraction
• Vegetation Health Index

GVPS example image

POES Resolution: 16 Km Frequency: Weekly