Accession Number:

ADA402136

Title:

Investigations of the Effects of Ionospheric Total Electron Content and Scintillation on Transionospheric Radio Wave Propagation

Descriptive Note:

Final rept. 8 Jul 1994-31 Aug 1998

Corporate Author:

NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA

Report Date:

1998-10-26

Pagination or Media Count:

46.0

Abstract:

Numerous DoD communication, navigation, and surveillance systems depend upon transionospheric propagation of radio signals between space and the ground. The group delay and phase advance encountered by such signals depend upon the path integral of ionospheric plasma density - the so-called total electron content TEC. Their phase and intensity also can fluctuate due to refractivediffractive scatter in plasma-density irregularities - i.e., they can suffer complex-signal scintillation. In this project, Northwest Research Associates NWRA collaborated with researchers at the Air Force Research Laboratory AFRL at Hanscom AFB in the observation and modeling of TEC and scintillation. Central to the TEC effort was operation and refinement of the Air Force Ionospheric Measuring System ANGMQ-35. The scintillation effort was confined to development of operational code, called WBMGRID, for running a gridded version of NWRAs scintillation model, WBMOD, with AFRLs Scintillation Decision Aid SCINDA. Late in the project, effort was re-directed from scintillation research to broader ionospheric questions, as part of the High Frequency Active Auroral Research Program.

Subject Categories:

  • Atmospheric Physics
  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE