Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa21a0429s&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SA21A-0429
Physics
2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities
Scientific paper
The Ionospheric Occultation Experiment (IOX) is a dual-frequency GPS receiver with a single Earth-limb viewing antenna. Ionospheric remote sensing is possible during occultation events in which the line of sight to a GPS satellite being tracked by IOX sets through the Earth's limb. IOX is in a 67° inclination, 800 km altitude orbit, enabling it to make ionospheric measurements at all local times under near-solar maximum conditions over the course of its mission. IOX has been making routine measurements of occulting GPS satellites since the latter part of November 2001. Signal-to-noise (SNR) fluctuation observations associate the with GPS C/A code on the L1 frequency are identified as due to ionospheric scintillation by the geographic (equatorial/high latitude) and local time (post-sunset) morphologies. A preliminary analysis of scintillation climatology inferred from the IOX measurements will be presented and compared to a model of scintillation occurrence.
Anderson Philip C.
Straus Paul R.
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