MSX measurements of BTH and ATH gravity waves and ATH polar mesospheric clouds

Stair, A. T.; Humphrey, C. H.; O'Neil, R. R.; Picard, R. H.; Dewan, E. M.; Gardiner, Harold A. B.; Hegblom, E.R.; Mill, John D.

doi:10.1109/aero.1999.792092

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Charles H. Humphrey (unpublished report, 1995) and other MSX team members designed and scheduled MSX experiments to measure the infrared radiance from PMCs. Preliminary results of these measurements were presented by Humphrey et al [1997] and O'Neil et al [2001] and are briefly described by Stair et al [1999]. A more detailed description of the characteristics of PMC ice particles based on the observation of their LWIR thermal radiance at wavelengths in the range from 11.1 to 25.1 μ m measured by two spectral bands of the SPIRIT III radiometer on 22 July 1996 is reported here.…”

Section: Introductionmentioning

confidence: 91%

Polar mesospheric clouds: Infrared measurements from the Midcourse Space Experiment

et al. 2008

View full text Add to dashboard Cite

[1] Spatial Infrared Imaging Telescope (SPIRIT) III radiometer on the Midcourse Space Experiment (MSX) satellite measured highly structured infrared, IR, emission from polar mesospheric cloud (PMC) ice particles at northern latitudes above 51 degrees on 22 July 1996 in the 11.1 to 13.2 and 18.2 to 25.1 mm radiometer channels, bands C and E, respectively. Measurements of the PMC thermal emissions included the observation of an extended cloud at 84.8°N and 325.6°E at 0313:25 UT, a local solar time of approximately 0056. In this Earth limb observation, the radiance due to the PMC has been isolated from other sources-atmospheric emission, nonrejected off axis radiation from the terrestrial surface and zodiacal radiance-and inverted to determine the volume emission rates of the ice particles at a spatial resolution of 0.3 km in the altitude range from 83.4 to 86.4 km. The band C PMC volume emission rate profile has a maximum value at 84.0 ± 0.3 km and decreases to one half the peak value at 85.0 and 83.5 km. Temperatures in the range from 143 ± 7 to 130 ± 8 K and ice volume densities from 1.5 to 0.5 Â 10 À13 cm 3 per cm 3 were determined from the LWIR volume emission rates at altitudes from 83.4 to 86.4 km. The PMC ice densities are equivalent to an enriched gas phase water mixing ratio of 8 to 16 parts per million by volume, ppmv, and a vertical column mass density of 3.3 Â 10 À8 gms cm À2 in this observation.

show abstract

Section: Introductionmentioning

confidence: 91%