Validation of Ionospheric Models
Scientific rept. n1
BOSTON COLL CHESTNUT HILL MA INST FOR SCIENTIFIC RESEARCH
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In the last year, we have studied several issues involving the validation of ionospheric models and the use of observational databases. Modeling work has included a mid-latitude intercomparison of five first principal physical models for the earths ionosphere. Work at low latitudes has involved using the Parameterized Ionospheric Model PIM to improve the International Reference Ionosphere IRI90 low latitude ionospheric specification. At high latitudes, the work has involved attempts to produce blobs at the times and locations of actual observations. The usefulness of GPS occultations have been studied using a series of simulations of such occultations and examining inversions of the simulations. Other studies have been made on various aspects of using OPS measurements for ionospheric research. These include the solar cycle dependence of the Total Electron Content TEC, the effects of anti-spoofing, the TEC of the protonsphere, the effects of instrumental bias, and spatial and temporal variations in the TEC.
- Atmospheric Physics
- Navigation and Guidance