Validation of the GUVI Auroral Radiance Measurements Using the UARS/PEM Instrument

Details Validation of the GUVI Auroral Radiance Measurements Using the UARS/PEM Instrument Validation of the GUVI Auroral Radiance Measurements Using the UARS/PEM Instrument

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa21b0450f&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA21B-0450

Physics

0342 Middle Atmosphere: Energy Deposition, 0358 Thermosphere: Energy Deposition, 2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2455 Particle Precipitation

Scientific paper

One of the key goals of the TIMED mission is to determine the energy input to the atmosphere. Auroral particle precipitation is responsible for a significant component of atmospheric heating, both via direct heating and via conductance enhancements contributing to Joule heating. The GUVI instrument on TIMED provides images of the auroral brightness, from which can be obtained estimates of the characteristic energy and flux of the precipitating electrons. However, the GUVI estimates must be validated. In this paper, we use direct measurements of precipitating electrons (5 eV to 5 MeV) from the Particle Environment Monitor (PEM) on the Upper Atmosphere Research Satellite (UARS) to validate the GUVI observations. We use the PEM data to produce a forward model of the GUVI brightnesses in different FUV wavelength bands. Several high latitude conjunctions of the two spacecraft occurred during April 2002, with corresponding auroral precipitation. We present the observations and discuss the significance of the comparisons.

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