dorsal/arxiv
View SchemaA case study of the mid-latitude GPS performance at nighttime during the magnetic storm of July 15, 2000
| Authors | E. L. Afraimovich, O. I. Berngardt, O. S. Lesyuta, A. P. Potekhin, B. G. Shpynev |
|---|---|
| Categories | |
| ArXiv ID | physics/0202052 |
| URL | https://arxiv.org/abs/physics/0202052 |
Abstract
Using the geomagnetic storm of July 15, 2000 as an example, we investigated the dependence of GPS navigation system performance on the nightside at mid-latitudes on the level of geomagnetic disturbance. The investigation was based on the data from the global GPS system available through the Internet. It was shown that the number of GPS phase slips increases with the increasing level of disturbance and that there is a good correlation between the rate of Dst-variation and the frequency of slips. It was further shown that the relative frequency of slips has also a clearly pronounced aspect dependence. Phase slips of the GPS signal can be caused by the scattering from small-scale irregularities of the ionospheric E-layer. Phase slip characteristics are indicative of Farley-Buneman instabilities as a plausible physical mechanism that is responsible for the formation of geomagnetic field-aligned irregularities. Using simultaneous measurements of backscatter signal characteristics from the Irkutsk incoherent scatter radar and existing models for such irregularities, we estimated the order of magnitude of the expected phase fluctuations of the GPS signal at a few degrees.
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"abstract": "Using the geomagnetic storm of July 15, 2000 as an example, we investigated\nthe dependence of GPS navigation system performance on the nightside at\nmid-latitudes on the level of geomagnetic disturbance. The investigation was\nbased on the data from the global GPS system available through the Internet. It\nwas shown that the number of GPS phase slips increases with the increasing\nlevel of disturbance and that there is a good correlation between the rate of\nDst-variation and the frequency of slips. It was further shown that the\nrelative frequency of slips has also a clearly pronounced aspect dependence.\nPhase slips of the GPS signal can be caused by the scattering from small-scale\nirregularities of the ionospheric E-layer. Phase slip characteristics are\nindicative of Farley-Buneman instabilities as a plausible physical mechanism\nthat is responsible for the formation of geomagnetic field-aligned\nirregularities. Using simultaneous measurements of backscatter signal\ncharacteristics from the Irkutsk incoherent scatter radar and existing models\nfor such irregularities, we estimated the order of magnitude of the expected\nphase fluctuations of the GPS signal at a few degrees.",
"arxiv_id": "physics/0202052",
"authors": [
"E. L. Afraimovich",
"O. I. Berngardt",
"O. S. Lesyuta",
"A. P. Potekhin",
"B. G. Shpynev"
],
"categories": [
"physics.geo-ph"
],
"title": "A case study of the mid-latitude GPS performance at nighttime during the magnetic storm of July 15, 2000",
"url": "https://arxiv.org/abs/physics/0202052"
},
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