S. Moulin et al., COMBINING AGRICULTURAL CROP MODELS AND SATELLITE-OBSERVATIONS - FROM FIELD TO REGIONAL SCALES, International journal of remote sensing, 19(6), 1998, pp. 1021-1036
This review article gives an overview of how satellite observations ar
e used to feed or tune crop models and improve their capability to pre
dict crop yields in a region. Relations between crop characteristics w
hich correspond to models state variables and satellite observations a
re briefly analysed, together with the various types of crop models co
mmonly used. Various strategies for introducing short wavelength radio
metric information into specific crop models are described, from direc
t update of model state variables to optimization of model parameter v
alues, and some of them are exemplified. Methods to unmix crop-specifi
c information from mixed pixels in coarse resolution-high frequency im
agery are analysed. The conditions of use of the various methods and t
ypes of information are discussed.