The Omega transmitter signals on 10.2, 11.33 and 13.6 kHz are frequently observed on GEOS-1 near the end of the pass. The signals show large fluctuations in amplitude and in E/B ratio on a time scale of 0.1 s. The time delay of the signals vary considerably over a period of a few minutes, and often the duration of the received pulses on the dipole antenna is longer than the duration of the transmitted pulses. The propagation aspects of these observations will be discussed on the basis of raytracing calculations from the ground to the vicinity of GEOS-1.
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Angerami, J. J.: 1970, J. Geophys. Res. 75, 6115.
Burhans, R. W.: 1974, Electronics 47, No. 18, 90.
Dunckel, N. and Helliwell, R. A.: 1974, Radio Science 12, 821.
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Ungstrup, E., Neubert, T. & Bahnsen, A. Observation on GEOS-1 of 10.2 to 13.6 kHz ground based transmitter signals. Space Sci Rev 22, 453–464 (1978). https://doi.org/10.1007/BF00210880
- Time Delay
- Transmitter Signal
- Propagation Aspect
- Large Fluctuation
- Transmitted Pulse