Ultraviolet Nightglow Production near the Magnetic Equator by Neutral Particle Precipitation

摘要

The near-modnight latitudinal (+/-45) distribution of the OI 911-A, 1304-A, and 1356-A emissions, observed by the extreme ultraviolet (EUV) spectrometer on the STP 78-1 satellite, have been analyzed and compared as a function of geomagnetic activity. The dominant source of these emissions is radiative recombination of atomic oxygen ions; however, for geomagnetically distributed periods, excess OI 1304-A and 1356-A emission is observed within +/-5 of the dip equator. Neutral particle precipitation from the ring current is discussed as a possible source of the excess OI 1304-A and 1356-A emission.