Analysis of Ionospheric Monitoring System (IMS) Total Electron Content (TEC) Data and Equatorial Phase-Scintillation Data.
Abstract
Many military systems used for communications, command and control, navigation, tracking, and surveillance depend on reliable and relatively noise-free transmission of radiowave signals through the earth's ionosphere. These systems can be affected by both large-scale features (> 1,000 km) and small-scale structures (> few hundred km) in the ionosphere, often leading to degraded operations. This report documents the results of the first year of a three-year investigation of various facets of this problem. Two study areas are reported on: (1) an investigation of methods for using signals from Global Positioning System (GPS) satellites to measure ionospheric Total Electron Content (TEC), and (2) a study of the shape and behavior of the phase-scintillation power-density spectrum (PDS) over a scale-size range of 1Os to 1OOs of kilometers. The TEC studies are still on-going; the phase PDS study found that the slope of the phase PDS at these scale sizes is steeper than those found in earlier studies at shorter scales.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1995
- Accession Number
- ADA306451
Entities
People
- Andrew Mazzella
- C. C. Andreasen
- Edward J. Fremouw
- Elizabeth Holland
- James A. Secan
Organizations
- Northwest Research Associates