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| Titel |
Doppler-shifted auroral H β emission: a comparison between observations and calculations |
| VerfasserIn |
F. Søraas, K. Måseide, P. Torheim, K. Aarsnes |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 10/11 ; Nr. 12, no. 10/11, S.1052-1064 |
| Datensatznummer |
250010343
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| Publikation (Nr.) |
 copernicus.org/angeo-12-1052-1994.pdf |
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| Zusammenfassung |
| Two sounding rockets equipped with
photometers and particle detectors have been flown into proton auroras. The
measured altitude dependence of the proton flux is compared with calculations
based upon known energy-range relations for protons in air. Expressions suitable
for numerical calculations of Doppler profiles at arbitrary angles to the
geomagnetic field and at different heights within an aurora are developed.
Profiles due to some typical proton spectra have been calculated and it is shown
that altitude profiles at some wavelengths are more sensitive to the shape of
the proton spectrum than are profiles at other wavelengths. Variations in the Hβ
Doppler profile versus height for several angles with the magnetic field is
studied. Profiles, as generated by the actually measured protons in the energy
range 1 keV to 1 MeV, have been calculated and are compared with direct optical
measurements made by ground and rocket photometers. The rocket photometers took
measurements at different wavelengths within the Doppler profile. The
correspondence between calculations and measurements is generally good. The
total Hβ is calculated and fair agreement with the measured
intensity is found. |
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