Comparison of 1D and 2D Nightside Ionospheric Retrievals From LORAAS Ultraviolet Limb Airglow Observations

Details Comparison of 1D and 2D Nightside Ionospheric Retrievals From LORAAS Ultraviolet Limb Airglow Observations Comparison of 1D and 2D Nightside Ionospheric Retrievals From LORAAS Ultraviolet Limb Airglow Observations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa52a0382d&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA52A-0382

Physics

0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 2419 Ion Chemistry And Composition (0335), 2447 Modeling And Forecasting, 2494 Instruments And Techniques

Scientific paper

The Advanced Research and Global Observations Satellite (ARGOS) was launched in February of 1999 into a 0230/1430 local time, sun-synchronous orbit and consisted of several remote-sensing instruments that measured the composition, density, and temperature of the thermosphere and ionosphere. The Low Resolution Airglow/Auroral Spectrograph (LORAAS) instrument aboard ARGOS observed naturally-occurring FUV and EUV airglow emissions on the Earth's limb. LORAAS had a line of sight that was in the orbital plane and aft of the spacecraft. The vertical field-of-view ranged from 50-750km and each scan consisted of 90 one-second integration periods. The instrument had a wavelength range of 800-1700\x8F with a 19\x8F resolution. LORAAS observations included nighttime intensity profiles of the OI 1356 \x8F emission, which is created by the radiative recombination of O+ and free electrons. Electron density profiles of the ionosphere are compared using both a 1-dimensional inversion technique and a 2-dimensional tomographic inversion technique. Observations include periods of high and low solar and geomagnetic activity. Results are compared to coincident ionosonde data, which are referenced as ground truth.

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