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Summary of Quantitative Interpretation of Image Far Ultraviolet Auroral DataDirect imaging of the magnetosphere by instruments on the IMAGE spacecraft is supplemented by simultaneous observations of the global aurora in three far ultraviolet (FUV) wavelength bands. The purpose of the multi-wavelength imaging is to study the global auroral particle and energy input from thc magnetosphere into the atmosphere. This paper describes provides the method for quantitative interpretation of FUV measurements. The Wide-Band Imaging Camera (WIC) provides broad band ultraviolet images of the aurora with maximum spatial and temporal resolution by imaging the nitrogen lines and bands between 140 and 180 nm wavelength. The Spectrographic Imager (SI), a dual wavelength monochromatic instrument, images both Doppler-shifted Lyman alpha emissions produced by precipitating protons, in the SI-12 channel and OI 135.6 nm emissions in the SI-13 channel. From the SI-12 Doppler shifted Lyman alpha images it is possible to obtain the precipitating proton flux provided assumptions are made regarding the mean energy of the protons. Knowledge of the proton (flux and energy) component allows the calculation of the contribution produced by protons in the WIC and SI-13 instruments. Comparison of the corrected WIC and SI-13 signals provides a measure of the electron mean energy, which can then be used to determine the electron energy fluxun-. To accomplish this reliable modeling emission modeling and instrument calibrations are required. In-flight calibration using early-type stars was used to validate the pre-flight laboratory calibrations and determine long-term trends in sensitivity. In general, very reasonable agreement is found between in-situ measurements and remote quantitative determinations.
Document ID
20020092007
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Frey, H. U.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA United States)
Immel, T. J.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA United States)
Mende, S. B.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA United States)
Gerard, J.-C.
(Liege Univ. Belgium)
Hubert, B.
(Liege Univ. Belgium)
Habraken, S.
(Centre Spatial de Liege Liege Belgium)
Span, J.
(NASA Headquarters Washington, DC United States)
Gladstone, G. R.
(Southwest Research Inst. San Antonio, TX United States)
Bisikalo, D. V.
(Academy of Sciences (USSR) Moscow, USSR)
Shematovich, V. I.
(Academy of Sciences (USSR) Moscow, USSR)
Six, N. Frank
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Geophysics
Meeting Information
Meeting: 34th COSPAR Scientific Assembly/World Space Congress 2002
Location: Houston, TX
Country: United States
Start Date: October 17, 2002
Sponsors: Committee on Space Research
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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