Accession Number:

ADA273875

Title:

Integral Probability of Auroral Electron Flux Events from SSJ/4 DMSP F9 Electron Measurements

Descriptive Note:

Interim rept.,

Corporate Author:

PHILLIPS LAB HANSCOM AFB MA

Personal Author(s):

Report Date:

1992-05-18

Pagination or Media Count:

31.0

Abstract:

A study has been completed to determine the probability of observing different levels of auroral electron precipitation both within fixed spatial elements in magnetic local time and corrected geomagnetic latitude, and within spatial elements when the magnetic local time is fixed but the latitude range can be varied. The auroral electron precipitation probability is defined for a series of thresholds in electron average energy and electron energy flux as a function of geomagnetic activity. The study provides the capability to determine the probability of observation of an auroral electron precipitation event for any specified threshold in average energy, energy flux, and level of geomagnetic activity for any location in the auroral region or for any line of sight through the auroral region. The input for the study Is one year of data from the SSJ4 electron and proton spectrometer flown on the F9 satellite of the Defense Meteorological Satellite Program DMSP comprising approximately 10, 141 hemispheric passes through the auroral region. The binning technique used to determine these probabilities is presented and some results are discussed. The operation of the software package to display the probability results is described.

Subject Categories:

  • Atmospheric Physics
  • Geomagnetism
  • Statistics and Probability
  • Particle Accelerators

Distribution Statement:

APPROVED FOR PUBLIC RELEASE