Accession Number : ADA262800


Title :   The Quiet Sunrise E Region: Enhancements at High Latitudes in Winter Due to Increased Nitric Oxide


Descriptive Note : Journal article


Corporate Author : PHILLIPS LAB HANSCOM AFB MA


Personal Author(s) : Snider, W ; Keneshea, T J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262800.pdf


Report Date : 01 Feb 1993


Pagination or Media Count : 5


Abstract : E region electron concentrations derived from European Incoherent Scatter Facility observations at 70 deg N were found to be much larger than normal for high solar zenith angles during 23 of 32 days in winter. Electron concentrations computed with the Keneshea code are compatible with the observations if nitric oxide concentrations are about 10 to the 9th power/cu cm at 100 to 110 km. For these altitudes near ground sunrise, it is shown that numerically, the nitric oxide concentration approximately equals the square of the electron concentration.


Descriptors :   *SCATTERING , *E REGION , *SUNLIGHT , ANGLES , IONOSPHERE , OBSERVATION , HIGH ALTITUDE , ATMOSPHERICS , SUNRISE , NITROGEN OXIDES , WINTER , ELECTRON DENSITY , REPRINTS


Subject Categories : Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE