MSU Ch 3/4 Daily Upper Troposphere Temps with Limb93 Correction V001 L3 1 day 2.5 degree x 2.5 degree (MSUUTT) at GES DISC

Published by NASA/GSFC/SED/ESD/GCDC/GESDISC | National Aeronautics and Space Administration | Metadata Last Checked: October 30, 2025 | Last Modified: 2025-07-17

The Microwave Sounding Unit (MSU) Upper Troposphere Temperature product (MSUUTT) provides gridded upper tropospheric temperatures derived from MSU instruments on several different platforms. The temperatures are derived using a combination of MSU channels 3 and 4 which has an averaging kernel that peaks near 250 hecto Pascals. The algorithm is based on Spencer and Christy (1990) with the LIMB 93 limb correction based on latitude, longitude, month, and scan angle. The MSU instruments measure the thermal emission of radiation by molecular oxygen at four frequencies near 60 GHz. North (south) of 66.7N (S) the footprint data are assigned to grid boxes in a weighted method depending on footprint latitude. Horizontal averaging is used to fill some of the empty grid boxes.

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Complete Metadata

bureauCode	[ "026:00" ]
identifier	C1261530423-GES_DISC
issued	1979-01-01
landingPage	https://cmr.earthdata.nasa.gov:443/search/concepts/C1261530423-GES_DISC.html
language	[ "en-US" ]
programCode	[ "026:001" ]
spatial	-180.0 -30.0 180.0 30.0
temporal	1979-01-01T00:00:00Z/1994-12-31T23:59:59.999Z
theme	[ "TOVS Pathfinder", "geospatial" ]