Summary

Description

The Nimbus IV was successfully launched on April 8 1970. Nimbus IV Temperature-Humidity Infrared Radiometer (THIR) experiment replaced the Nimbus III MRIR and HRIR experiments. The THIR is a two channel high resolution scanning radiometer designed to perform two major functions: o 10.5 – 12.5 micron channel provides both day and night cloud top or surface temperatures. The ground resolution at the sub-point is 8km and operates day and night. o 6.7 micron channel gives information on the moisture content of the upper troposphere and stratosphere and the location of jet streams and frontal systems. The water vapor channel has a resolution of the sub-point is 22 km and operates mostly at night. The Nimbus IV THIR data are available from ?? (Day of year ??) through ?? (Day of year ??). The Nimbus IV THIR data are stored in a binary TAP format (proprietary Tape emulated format). [Summary Extracted from the Nimbus IV users' guide]