Accession Number:

ADA517436

Title:

Investigation of Plasma Phenomena in the Ionosphere Under Natural Conditions and Under Conditions Artificially Perturbed by HAARP

Descriptive Note:

Final rept. 18 Aug 2005-31 Jul 2008

Corporate Author:

NORTHWEST RESEARCH ASSOCIATES INC REDMOND WA

Report Date:

2008-08-31

Pagination or Media Count:

134.0

Abstract:

During the report period, NorthWest Research Associates NWRA conducted ionospheric measurements at several Air Force research and operational locations and analyzed the data collected thereby. The measurements were performed using a variety of radiowave techniques, most involving transionospheric radio propagation, and included observations of ionospheric perturbations via high-power transmissions under the High frequency Active Auroral Research Program HAARP. Total Electron Content TEC from a chain of stations in Alaska were inverted tomographically to produce altitude versus latitude images of plasma density. By these and other means, ionospheric features such as the main F-layer trough and polar patches were characterized for application to Air Force environmental models. Studies of ionospheric scintillation focused on the performance of models for scintillation were conducted. A number of studies were undertaken to develop better means of partitioning GPS TEC data in altitude and to assess uncertainties in TEC derived from GPS observations.

Subject Categories:

  • Atmospheric Physics
  • Test Facilities, Equipment and Methods
  • Active and Passive Radar Detection and Equipment
  • Radiofrequency Wave Propagation
  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE