Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2010, Vol. 7, No. 1, pp. 159-172
Mid-latitude field-aligned ionospheric plasma disturbances and
its impact on differential navigation systems DGPS and very long base interferometers
E.L. Afraimovich
, E.I. Astafyeva
, A.B. Ishin
, E.A. Kosogorov
, Yu.V. Yasyukevich
Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russian Federation, 126a, Lermontov street, 664033, P.O. Box 291
Using technique of magnetic zenith scanning by GPS rays it was shown that unusual northward isolated ionosphere irregularities registered on 5th October 2001 above California are manifestation of field-angled plasma disturbances (FAD). FADs are characterized by positive deviation of the total electron content (TEC) value up to 4 TECU (1016 el/m2). Corresponding TEC variations are isolated impulses with duration of ~40 min. We estimate the influence of such irregularities on differential GPS. Some problems connected with radio signal parameters change may arise when up-to-date very long base interferometers operate, for example, LOFAR or SKA. For case under study we analyzed corresponding errors of phase, Doppler frequency shift and angular error at 100 MHz
Keywords: GPS, blobs, ionosphere, field-angled disturbances
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