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Abstract:
In the last year, we have studied several issues that are critical for understanding ionospheric weather. Work on global F-region modeling has consisted of testing the Phillips Laboratory Global Theoretical Ionosphere Model. Comparisons with both data and other theoretical models have been successfully conducted and are ongoing. GPS observations, as well as data analysis, are also ongoing. Data have been collected for a study on the limitations in making absolute ionospheric measurements using GPS. Another study on ionospheric variability is the first of its kind using GPS data. The observed seasonal total electron content behavior is consistent with that determined from the Faraday rotation technique. Work on the FAA's Phase 1 Wide Area Differential GPS (WADGPS) Satellite Navigation Testbed Experiment also continues. Initial results indicate that stations using operational WADGPS should be located no greater than 430 km apart. Work comparing our electron-proton-H atom model to both observations and other models has been generally successful. We have successfully modeled the creation of high-latitude large-scale plasma structures using two separate mechanisms (time-varying global convection and meso-scale convection events). Ionospheric weather, Global F-region modeling, Total electron content, GPS, TEC, Aurora, Electron transport, Proton-H atom transport, Plasma structure, Patches
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Pages: |
45 |
| Report Date: |
28 FEB 94 |
| Contract Number: |
F19628-93-K-0001 |
| Report Number: |
A025582 |
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