Effect of Storm Enhanced Densities on Geo-Location Accuracy over CONUS
Abstract
Storm enhanced densities (SEDs) are ionospheric plasma enhancements that disrupt radio communications in the near-Earth space environment, degrading the Global Positioning System (GPS) and other key technologies. Accurate GPS/total electron content (TEC) correction maps produced by ionosphere models can mitigate degradations from SEDs. An artificial SED was created and ingested via slant TEC measurements into the Global Assimilation of Ionospheric Measurements Gauss-Markov Kalman Filter Model to determine how many ground GPS receivers are needed to produce reliable GPS/TEC correction maps over the continental United States during geomagnetic storming. It was found that 110 well-positioned GPS receivers produced the best overall TEC accuracy, although significantly improved accuracy was still achieved if 40 or more receivers were used. Furthermore, receiver positioning had a greater impact on TEC accuracy than the number of receivers used. It was also found that TEC accuracy for the SED region increased at the expense of TEC accuracy everywhere else on the map.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 2011
- Accession Number
- ADA547954
Entities
People
- Lindon H. Steadman
Organizations
- Air Force Institute of Technology