Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere

Details Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47..401b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 47, April 1985, p. 401-409. NASA-supported research.

Physics

4

Angular Distribution, Auroral Zones, Bremsstrahlung, Electron Precipitation, Middle Atmosphere, Energy Spectra, Flux (Rate), Riometers, Rocket Flight, Scintillation Counters, X Rays

Scientific paper

The angular distributions of atmospheric electron bremsstrahlung at 45-65 km are determined by analyzing NaI-scintillation-detector measurements of X-rays in energy ranges upward of 5, 10, 20, and 40 keV obtained in two rocket flights over Alaska during March 1978 as part of the Aurorozone II project (Goldberg et al., 1984). The data are presented graphically and characterized, with a focus on periods of post-breakup auroral precipitation events. Findings reported include generally uniform upward and downward intensities, with the upward intensity typically 1-10 percent of the total; a smooth zenith-nadir transition of angular width less than + or - 20 deg at 40 keV; a downward energy spectrum dominated by direct X-rays at 65 km but much less so at lower altitudes (where Compton-scattered X-rays play a greater role); and a completely scattered-X-ray-dominated upward energy spectrum. Reasonable agreement is found when these data are compared with the theoretical bremsstrahlung calculations of Berger and Seltzer (1972).

Affiliated with

Also associated with

No associations

Rating

Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere 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 Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurements of the angular distribution of auroral-zone bremsstrahlung in the middle atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1289258