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Fig
ure 22.2
Maps of forage deviation from the long-term average that are used to pinpoint areas
of drought vulnerability in the Livestock Early Warning System.
A
cquiring Satellite-Based Weather Data
A technique for estimating precipitation over Africa has been developed to
augment the rainfall data available from the relatively sparse observational
network of rain-gauge stations over this region. For the period 1998-2001,
the data used by LEWS was the rainfall estimator (RFE) version 1.0 prod-
uct. The method uses METEOSAT 5 satellite data, Global Telecommunica-
tion System (GTS) rain-gauge reports, model analyses of wind and relative
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