FAO :: Locust Watch :: Activities :: DLIS :: Satellites :: NOAA and SPOT4
Satellite Information for Locust Forecasting: NOAA and SPOT4
Radiometer (AVHRR) and VEGETATION sensors. These sensors provide information on vegetation status such as vegetation greenness, percentage of vegetation cover and vegetation moisture content. Images are provided on a daily basis with a spatial resolution (pixel size) of approximately 1 x 1 km. NOAA-AVHRR images were used by the Migratory Pest Group until the launch of SPOT4-VEGETATION in April 1998.

SPOT4-VEGETATION images offer a series of advantages over NOAA-AVHRR images. They provide better image positioning and better calibration. Daily SPOT4-VEGETATION images are synthesized on a 10-day basis (SPOT-VGT S10 products) and made available for monitoring vegetation conditions to the Migratory Pests Group.

A product using the vegetation index (NDVI) is available and used operationally to monitor vegetation greenness. New products such as the percentage of vegetation cover and vegetation/soil moisture content are under development to improve locust forecasting methods.

(FAO-ARTEMIS)

SPOT4-VGT NDVI first decade January 2002 (FAO-ARTEMIS)