Identification of irrigated fields is not self-evident for humid climates with regular
showers and frequently overcast skies, although successes have been reported by using a
time series of satellite images. The inclusion of microwave data, insensitive to cloud
obstructions, could be elementary to measure land surface features under cloudy conditions. Chakraborty et al. (1997) for instance, identified four major types of lowland
cultivation practices prevailing in West Bengal (India) with a 90% classification accuracy
using three-date C-band data of the European Remote Sensing satellite ERS-1.