Using X-ray Occultation Sounding (XOS) to Detect Atmospheric Features in the Upper Mesosphere and Lower Thermosphere: A comparison to NRLMSISE-00 and SABER measurements.

Details Using X-ray Occultation Sounding (XOS) to Detect Atmospheric Features in the Upper Mesosphere and Lower Thermosphere: A comparison to NRLMSISE-00 and SABER measurements. Using X-ray Occultation Sounding (XOS) to Detect Atmospheric Features in the Upper Mesosphere and Lower Thermosphere: A comparison to NRLMSISE-00 and SABER measurements.

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa23a..10d&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA23A-10

Computer Science

Sound

0300 Atmospheric Composition And Structure, 0330 Geochemical Cycles (1030), 0340 Middle Atmosphere: Composition And Chemistry, 0350 Pressure, Density, And Temperature, 3360 Remote Sensing

Scientific paper

X-ray Occultation Sounding (XOS) measures total atmospheric density in the lower thermosphere and mesopause region (70-150 km) using the 2-45 keV bandpass. As bright celestial X-ray sources are occulted by the Earth's atmosphere, absorption arising from inner-shell photoionization provides density information which is independent the chemistry, ionization, and thermal states of atmospheric gases. We compare recent XOS density retrievals (14-18 Nov. 2005), using different bandpasses, obtained by the Pulse Counter Array (PCA) aboard the Rossi X-ray Timing Explorer (RXTE) satellite to the NRLMSISE-00 empirical climatological atmospheric model and measurements obtained by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment. This comparison shows that XOS and SABER density retrievals approximately agree, but differ significantly from the MSIS climatological prediction at some altitudes. We also consider how dynamical and space weather effects might account for deviations of measured densities from climatological predictions.

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