Neutral hydrogen flux measured at 100- to 200-km altitude in an electron aurora

Details Neutral hydrogen flux measured at 100- to 200-km altitude in an electron aurora Neutral hydrogen flux measured at 100- to 200-km altitude in an electron aurora

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2169i&link_type=abstract

Journal of Geophysical Research, vol. 80, June 1, 1975, p. 2169-2171.

Computer Science

Sound

Auroral Arcs, Hydrogen, Ionospheric Sounding, Neutral Particles, Angular Distribution, Atmospheric Composition, Electron Flux Density, Electron Precipitation, Ionospheric Electron Density, Particle Flux Density, Proton Flux Density, Rocket Sounding

Scientific paper

Neutral hydrogen fluxes were measured at altitudes of 120-200 km by a rocket payload that also measured electron and proton fluxes and vector magnetic fields. An intense electron arc was crossed, while an upper limit to the flux of 0.5- to 20-keV protons was 1,000,000 per sq cm s sr keV. A neutral flux of 50,000,000 per sq cm s sr was observed, assuming hydrogen with greater than 1-keV energy, with greater north-south extent than the electron flux. Its pitch angle distribution was peaked toward 90 deg, tending toward isotropy in the center. This is fitted to a model describing spreading of an initial proton arc above 500 km.

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