Validating the microwave sounding unit stratospheric record using GPS occultation

Details Validating the microwave sounding unit stratospheric record using GPS occultation Validating the microwave sounding unit stratospheric record using GPS occultation

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30q...4s&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 14, pp. 4-1, CiteID 1734, DOI 10.1029/2003GL017588

Computer Science

Sound

Global Change: Remote Sensing, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics (0341, 0342), Meteorology And Atmospheric Dynamics: Polar Meteorology, General Or Miscellaneous: Instruments Useful In Three Or More Fields

Scientific paper

We validate the temperature climatology recorded by the Microwave Sounding Unit with GPS occultation data collected by the GPS/MET experiment. We choose to validate only the lower stratospheric MSU climatology in order to circumvent the wet-dry ambiguity associated with GPS occultation in the mid- to lower troposphere. We simulate the lower stratospheric channel's brightness temperature by convolving each GPS/MET temperature profile with a vertical weighting function and then map the irregularly gridded data using a Bayesian interpolation scheme. In northern polar night, the MSU Tls deviates from GPS occultation by as much as 10 K while occultation is consistent with the NCEP Reanalysis used for diagnostic purposes. NCEP and GPS occultation deviate by 1 K in the tropics, consistent with a warm bias in NCEP Reanalysis. GPS occultation renders the problems MSU encounters with inter-satellite calibration obsolete, because calibration by atomic clocks is free of systematic error and can completely cover the diurnal cycle.

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