Abstract
The TIROS High Resolution Sounder1 (HIRS), like previous atmospheric sounders, relys heavily upon CO2 v2 15 micron R branch (675–715 cm−1) absorption and adjacent CO2 (v1 – v2) "hot" band absorption (at 721 cm−1 and 742 cm−1) for tire purpose of obtaining atmospheric temperature retrievals.2 Although this region is somewhat complicated by a weak 710 cm−1 ozone band, it is near the Planck function peak and (unlike the P branch) is relatively unaffected by water and CO2 heavy isotope absorption.
© 1980 Optical Society of America
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