Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 6, pp. 139-144
Influence of the substorm precipitation and polar cap patches on GPS signals at high latitudes
V.B. Belakhovsky
1 , Y. Jin
2 , W. Miloch
2 1 Polar Geophysical Institute, Apatity, Russia
2 University of Oslo, Oslo, Norway
Accepted: 15.09.2020
DOI: 10.21046/2070-7401-2020-17-6-139-144
The comparative research of the influence of substrorm precipitation and polar cap patches (PCP) on the GPS signals disturbances in the polar ionosphere was done. For this aim we use the GPS scintillation receivers at Ny-Ålesund, operated by the University of Oslo. The presence of the auroral particle precipitation and polar cap patches was determined by using data from the EISCAT 42 m radar on Svalbard. We consider tens of events when the simultaneous EISCAT 42 m and GPS data were available. We demonstrate that substorm-associated precipitations can lead to a strong GPS phase (σφ) scintillations up to ~2 radians which is much stronger than those usually produced by PCPs. At the same PCPs can lead to strong ROT (rate of total electron content) variations. So, our observations suggest that the substorms and PCPs, being different types of the high-latitude disturbances, lead to the development of different types and scales of ionospheric irregularities.
Keywords: ionosphere, GPS receiver, substorm, polar cap patch
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