Accession Number:

ADA243378

Title:

An Investigation of Methods for Updating Ionospheric Scintillation Models Using Topside In-Situ Plasma Density Measurements

Descriptive Note:

Rept. for 1 May 1990-30 Apr 1991

Corporate Author:

NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA

Personal Author(s):

Report Date:

1991-05-15

Pagination or Media Count:

59.0

Abstract:

Modern military communication, navigation, and surveillance systems depend on reliable, noise-free transionospheric radio-frequency channels. They can be severely impacted by small-scale electron-density irregularities in the ionosphere, which cause both phase and amplitude scintillation. Basic tools used in planning and mitigation schemes are climatological in nature and thus may greatly over- and under-estimate the effects of scintillation in a given scenario. This report summarizes the results of the first year of a three-year investigation into the methods for updating ionospheric scintillation models using observations of ionospheric plasma-density irregularities measured by DMSP Scintillation Meter SM sensor. Results are reported from the analysis of data from a campaign conducted in January 1990 near Tromso, Norway, in which near coincident in-situ plasma-density and transionospheric scintillation measurements were made. Estimates for the level of intensity and phase scintillation on a transionospheric UHF radio link in the early-evening auroral zone were calculated from DMSP SM data and compared to the levels actually observed.

Subject Categories:

  • Atmospheric Physics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE