Observed and model N(h) profiles for the Bulgarian region |
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| Authors: | Ts Pasheva D Samardziev NP Benkova NA Kochenova Ju Kushnerevskij |
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| Institution: | 1. Geophysical Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria;7. Institute of Terrestrial Magnetism, Ionosphere and Radio-Wave Propagation, U.S.S.R. Academy of Sciences, Troitsk, U.S.S.R. |
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| Abstract: | In this paper, combined bottom- and topside ionospheric N(h)-profiles are presented for the Bulgarian region. The profiles were constructed using ground (ionospheric observatories Sofia and Michurin) and satellite (Interkosmos-19) observations /1/.The observatories make quarter-hourly observations; in order to connect bottom and upper parts of the N(h) profile, we selected satellite orbits passing rather near to the observatory (zenith distance lsss than 100 km). Thus the time difference between ground station and satellite measurement was never more than 7.5 min. |
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