Nonpermanent nighttime H Lyman alpha emissions at low and middle latitudes, detected from the D2A satellite

Details Nonpermanent nighttime H Lyman alpha emissions at low and middle latitudes, detected from the D2A satellite Nonpermanent nighttime H Lyman alpha emissions at low and middle latitudes, detected from the D2A satellite

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.6049c&link_type=abstract

Journal of Geophysical Research, vol. 85, Nov. 1, 1980, p. 6049-6054.

Physics

1

Airglow, Geocoronal Emissions, H Alpha Line, Lyman Alpha Radiation, Night Sky, Satellite Observation, D-2 Satellites, Kp Index, Midlatitude Atmosphere, Resonance Scattering, Tropical Regions

Scientific paper

The paper deals with strong nonpermanent emissions observed from two H Ly alpha experiments on board the D2A satellite. These unexpected emissions are superposed on the permanent geocoronal Ly alpha airglow due to resonant scattering of the Ly alpha solar line by telluric atomic hydrogen. The emissions were detected both above and below the satellite altitude (500 km) at latitudes between plus and minus 40 deg. The correlation observed between their occurrence frequency and the Kp index strongly suggests precipitation of particles is the source of excitation.

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