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Ionospheric Mapping with the GPS/MET

Show simple item record Hajj, George en_US Romans, Larry en_US 2004-09-30T22:35:20Z 2004-09-30T22:35:20Z 1996-06-19 en_US
dc.identifier.citation Cambridge, MA en_US
dc.identifier.clearanceno 96-1163 en_US
dc.description.abstract The GPS/MET experiment, which placed a GPS receiver in a low-Earth orbit tracking the GPS in an occultation geometry, has collected thousands of occultations since its launch in April of 1995. Each occultation can be inverted to give an electron density profile in the ionosphere, temperature and pressure profiles in the lower mesosphere, stratosphere and upper troposphere, and water vapor density profiles in the lower troposphere. This paper gives a summary of the ionospheric effects on the GPS/MET signal and examines some of the retrieved electron density profiles. We examine the bending induced by the ionosphere on the occulting signal and the resulting separation of the two GPS links corresponding to the L1 and L2 phase signals. We also examine the amplitude scintillation caused by sharp layers at the bottom of the ionosphere. We briefly describe the Abel inversion method for obtaining the index of refraction and show several examples of electron density profiles and comparisons derived from the Parameterized Ionospheric Model (PIM) and to incoherent scatter radar measurements. en_US
dc.format.extent 893605 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other GPS ionospheric effects electron density profiles occultations Parameterized Ionospheric Model en_US
dc.title Ionospheric Mapping with the GPS/MET en_US

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