Abstract
By using a satellite data set and operational in situ measurements of snow, we produced a new data set to develope a detection scheme of snow in Japan using the satellite data. N-LAND database, created from NOAA-HRPT data, and AMeDAS observation data are combined to produce the data set. A case study of the snow detection made for the Tohoku area on 15 February, 1989 using the data set, shows that, with respect to the presence of snow, 96.4% of the cloud free observation points are judged right by a simple threshold level of channel 1 of AVHRR/NOAA. The failed points are investigated in detail, and possible explanations of the failures are given.
