Passive Global, Real-Time TEC Monitoring Using GPS-based Radio Receivers

Details Passive Global, Real-Time TEC Monitoring Using GPS-based Radio Receivers Passive Global, Real-Time TEC Monitoring Using GPS-based Radio Receivers

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa53a1366s&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA53A-1366

Physics

2400 Ionosphere (6929), 2494 Instruments And Techniques, 3324 Lightning, 6929 Ionospheric Physics (1240, 2400), 6982 Tomography And Imaging (7270, 8180)

Scientific paper

Over the last several years, we have used the low-earth orbiting Fast On Orbit Recording of Transient Events (FORTE) satellite and a growing array of radio receivers aboard the Global Positioning System (GPS) satellite constellation to demonstrate a technique for making passive, global, satellite-based measurements of the ionospheric total electron content (TEC). The technique uses very high frequency (VHF) radio emissions from lightning events to quantify the line-of-sight TEC between the lightning event and satellite. As the VHF lightning signal propagates to the satellite, the dispersive effects of the ionosphere cause the higher frequency components of the signal to arrive at the satellite before the lower frequency components. By noting the time- of-arrival at several frequencies, we can derive the TEC between the lightning event and each satellite sensor that detects the lightning. Using multi-satellite techniques we can geolocate the lightning and the ionospheric penetration point of the lightning-satellite line-of-sight quite accurately. The resulting data product is a spatially and temporally irregular, but global and near real-time mapping of TEC. This paper will evaluate the expected operational performance of such a system, describe some applications (e.g. global TEC monitoring and tomography), and will also describe a framework for operationalizing this growing capability aboard GPS in next five years.

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