Observations of total electron content perturbations on GPS signals caused by a ground level explosion

Details Observations of total electron content perturbations on GPS signals caused by a ground level explosion Observations of total electron content perturbations on GPS signals caused by a ground level explosion

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jastp..59..829f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, v. 59, p. 829-834.

Physics

24

Scientific paper

We have measured perturbations of electron density in the ionosphere caused by a ground level explosion with an energy release of 2 kt (8.5 × 1012 J) using transmissions from Global Positioning System (GPS) satellites to monitor integrated electron density. The frequencies of the transmissions were 1575.42 MHz (L1) and 1227.60 MHz (L2). The detected perturbation showed a maximum excursion of 0.14 TEC units and had a duration of 80 s beginning at 565 s after the explosion. The acoustic disturbance necessary to produce such a perturbation is well modeled as an N wave with a dimension of 35 km and a relative amplitude of 12% propagating radially at a speed of 0.7 km/s. The majority of the TEC perturbation occurred at an altitude of approximately 200 km.

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