Stratospheric Sounding Unit
Stratospheric temperature sounding
Pressure-modulated spectrometer, operating around the wavelengths 14.92, 14.93 and 14.94 µm
Follow-on of SCR flown on Nimbus-4/5 and PMR flown on Nimbus-6. Part of the TIROS Operational Vertical Sounder (TOVS) package
Cross-track, swath 1470 km
150 km at s.s.p.
Coverage / Cycle
Global, each day
Flown on operational programme
1979 to 1981-02-27
Satellites this instrument is flying on
Note: a red tag indicates satellites no longer operational, a
green tag indicates operational satellites, a blue tag indicates
Earth observation instrument Passive optical radiometer or spectrometer Cross-nadir infrared sounder, possibly including VIS channels
No WIGOS subcomponents have been defined.
Tentative Evaluation of Measurements
The following list indicates which measurements can
retrieved from this category of instrument. To see a full Gap Analysis by Variable,
click on the respective variable.
Note: table can be sorted by clicking on the column headers
Variable Relevance for measuring this variable Operational limitations Explanation
Atmospheric temperature 4 - fair Cloud sensitive.. Very coarse vertical resolution.. Inaccurate in low troposphere. TIR in the CO2 15 micrometer band