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Satellite Beacons Observations from 1964 to 1970 (Paperback)
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Satellite Beacons Observations from 1964 to 1970 (Paperback)
Series: Mitteilungen aus dem Max-Planck-Institut fur Aeronomie, 48
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From October 1964 to May 1969 the 40 MHz, 41 MHz, and 360 MHz
signals of the satellite Explo 0 0 rer 22, were recorded at Lindau
(51,650 N; 10,125 E). The Faraday effect recordings at 40 MHz and
41 MHz and Dispersive-Doppler-effect recordings at 40 MHz and 360
MHz were used to calculate the ionospheric electron content up to
1000 km. The mean electron content for 1 hour periods over a period
0 of three months as obtained at 51. 6 N geographic latitude as
derived from various evaluation methods is presented. Furthermore,
the relevant critical frequency FOF2 is displayed. A similar
presentation was chosen for the calculated slabthickness data. For
one specific case the daily variation of the electron con tent as
determined by measurements was compared with a relevant theoretical
curve. The agreement, was fairly good. Due to technical problems
the beacons were switched off in 1969. Now the five orbiting
FS-NNSS satellites provide a good possibility to determine the
ionospheric electron content up to 1100 km fairly accurately by
evaluating the Dispersive Doppler recordings obtained at 150 MHz
and 400 MHz. The amplitude recordings of the 40 MHz and 41 MHz
signals of Explorer 22 were furthermore used for amplitude
scintillation studies. Simultaneous Dispersive-Doppler-recordings
enabled in part also pha se scintillation studies. Phase and
amplitude recordings were compared."
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