NUMERICAL-SIMULATION EXPERIMENT ON THE EQ UIVALENT CHANNEL SELECTION FOR STRATOSPHERIC SOUNDING

It was thought that an equivalent atmospheric sounding channel can be obtained by a lot of simulated computation, of which the peak height w eighting function is higher than that of the first channel of HIRS/2 i nstrument onboard the NOAA serial meteorological satellites of USA; By comparing the retrievals obtained from the equivalent channel with or iginal retrievals, the result shows that there is an improvement on th e temperature retrievals by adding the equivalent channels, particular ly on stratosphere (50-2hPa) profiles with the average improvement of 0.27K.