Computer Science – Sound
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa31a..12s&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA31A-12
Computer Science
Sound
0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques
Scientific paper
We have developed a forward model of the O~II 247.0~nm emission to determine thermospheric atomic oxygen densities between 150-400~km altitude. The O~II 247.0~nm emission is produced by the photoionization and excitation of atomic oxygen by solar extreme ultraviolet light, and thus is a good daytime tracer of this dominant thermospheric constituent. Previously, we have successfully applied our model to a single sounding rocket measurement. We present new results using our forward model to invert more than 150 limb scans of the 247.0~nm airglow emission obtained by the Ionospheric Spectroscopy and Atmospheric Chemistry (ISAAC) experiment on the Advanced Research and Global Observation Satellite (ARGOS). These profiles, taken on May~22, 2000, serve as an initial test of the feasibility of using this emission as a monitor of global atomic oxygen. Our discrete inverse code uses maximum likelihood techniques to iteratively calculate an atomic oxygen density profile by modifying chosen input parameters using scalar multipliers. These scalars are applied to four parameters: the atomic oxygen density profile, the solar F10.7 index, the volume excitation rate g-factor, and the coefficient for the quenching of the O~II excited state by atomic oxygen. Our results suggest a correlation between the solar F10.7 index and quenching coefficient scalars will necessitate a better determination of this quenching coefficient to improve the precision of the retrieved densities. This forward model can be coupled with the forward model of an N2 emission, such as the N~II 214.3~nm airglow feature, to invert the simultaneous emission altitude profiles and retrieve O and N2 densities.
Budzien Scott A.
Dymond Ken F.
McCoy Robert P.
Meier Robert R.
Stephan Andrew Ward
No associations
LandOfFree
Thermospheric Oxygen Densities From ARGOS Limb Profiles of Middle Ultraviolet Airglow does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermospheric Oxygen Densities From ARGOS Limb Profiles of Middle Ultraviolet Airglow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermospheric Oxygen Densities From ARGOS Limb Profiles of Middle Ultraviolet Airglow will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1722195