Inversions of satellite to satellite electron content: Simulation studies with NeUoG-plas |
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| Institution: | 1. Department of Civil and Environmental Engineering, University of New Hampshire, 35 Colovos Road, 334, Gregg Hall, Durham, NH, United States;2. Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States |
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| Abstract: | The signals of Global Navigation Satellites have found a large number of uses in atmospheric and ionospheric research. Reception of the signals from a satellite in a Low Earth Orbit (LEO) leads regularly to occultation of the signals by the surface of the Earth. Before an occultation the signals traverse the ionosphere with rays with decreasing height of their perigees. Satellite electron content observed prior to ‘setting’ occultations or after `rising' occultations can be used as input data for inversion. The inversion procedure gives horizontally averaged height profiles of electron density.Assessment studies are needed to find out under which conditions the profiles from inversions are representative for ‘true’ electron density profiles above the Earth occultation point.A great number of such studies have been carried out using the ionosphere/plasmasphere model NeUOG-plas for forward and backward modelling. Different transmitter-receiver scenarios have been investigated.We describe the assessment procedure and report on results showing the most interesting cases and statistics. |
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