Use of Satellite Data

Weather data are commonly used to estimate crop yield and agricultural droughts. However, weather data are collected only on point locations and do not adequately represent the spatial coverage by crops. In contrast, satellite data have greater capability to monitor crop condition in a spatially continuous fashion and on a regular time interval and therefore have proven to be a dependable source for monitoring crop yields and agricultural droughts. Various types of satellite data are currently available for monitoring crop conditions. These can be categorized into: (1) visible and infrared data, (2) passive microwave data, and (3) active microwave data.

Chapters 5, 6, 7, and 8 provide details on how different types of the satellite data can contribute to monitoring agricultural droughts.

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