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
Personal Author(s):
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.
Descriptors:
- *RADIO WAVES
- *IONOSPHERIC SCINTILLATION
- *TOMOGRAPHY
- *PLASMAS(PHYSICS)
- *INCOHERENT SCATTERING
- POSITION(LOCATION)
- AIR FORCE
- ENVIRONMENTS
- AIR FORCE RESEARCH
- MODELS
- OBSERVATION
- ALASKA
- ELECTROMAGNETIC WAVE PROPAGATION
- ELECTRONS
- GLOBAL POSITIONING SYSTEM
- CHAINS
- IMAGES
- AURORAE
- RADIO TRANSMISSION
- F REGION
- SCINTILLATION
- LATITUDE
- IONOSPHERIC DISTURBANCES
- IONOSPHERIC PROPAGATION
- TROUGHS
- MEASUREMENT
- DENSITY
- POLAR REGIONS
- RIOMETERS
- STATIONS
- IONOSPHERE
Subject Categories:
- Atmospheric Physics
- Test Facilities, Equipment and Methods
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation
- Meteorology