NASA/Goddard Space Flight Center, called GSFC Mark-II 
Three Band Hand-Held Radiometer. The calibration of 
the data is, among other things, one of the key factors 
to warrant decent quality of the data themselves. In 
this case, "Halon" powder (trade name for a powderred 
fluorocarbon) is to be coated on a flat surface 
for calibration purpose. The first rice crop season 
just began in southern Taiwan. It becomes progressively 
later toward the north. The field data will be taken 
immediately upon receipt of the radiometer just shipped 
out of U.S.A.. By next September, we are expecting to 
collect the spectral data of the rice crop over two crop 
seasons. Part of the data will be compared to the simul- 
taneous data taken with the air-borne multispectral scamer, 
to be operational in coming April. The data are also ex- 
pected to be correlated with various meteorological and 
agronomic variables, such as temperature, solar radiation, 
canopy biomass, plant height, percentage crop cover etc.. 
It is expected that the results will be very useful for 
better interpreting space or air-borne maltispectral scamer 
data and will potentially be applicable to forecast rice 
grain-yield in the future. 
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