Rotational and Scale-height Temperatures from ARGOS Observations of N2 Lyman-Birge-Hopfield Emission

Details Rotational and Scale-height Temperatures from ARGOS Observations of N2 Lyman-Birge-Hopfield Emission Rotational and Scale-height Temperatures from ARGOS Observations of N2 Lyman-Birge-Hopfield Emission

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa22a0714b&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA22A-0714

Physics

0310 Airglow And Aurora, 0350 Pressure, Density, And Temperature, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques

Scientific paper

Thermospheric temperature can be inferred from the rotational temperature of N2 in far-ultraviolet Lyman-Birge-Hopfied (LBH) emission, if the band shapes are measured with sufficient spectral resolution. Temperature may also be estimated from the scale height of LBH emission in limb scanning observations, but scale height temperatures can be affected by departures from diffusive equilibrium. The Advanced Research and Global Observations Satellite (ARGOS), launched February 1999, includes the High-resolution Ionospheric and Thermospheric Spectrograph (HITS), a far-ultraviolet sensor with 1-Å resolution well-suited to measure global N2 temperatures. The Low Resolution Airglow and Aurora Spectrograph (LORAAS), an 18-Å resolution far-ultraviolet limb scanner, is coaligned with HITS and operates simultaneously. Rotational temperature retrievals from the LBH (1-1) band will be compared to temperatures retrieved from atmospheric, excitation, and radiative transfer modeling of LBH limb scans. We will evaluate the two methods, compare results to thermospheric model predictions, and search for differences between rotational and scale-height temperatures.

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