Measurements of wave normal direction of whistler mode signals in the ionosphere by means of the Rocket-Doppler technique

Kimura, Ikuo; Tomimoto, Tetsuo; Hiraishi, Kai

doi:10.1016/0032-0633(73)90078-0

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…James [1972] and Cerisier and James [1970] have concluded that ¾LF ducts probably c•o not exist at low latitudes. The wave normal direction of whistler mode VLF signals of 22.3 kHz transmitted from Australia was determined by means of two rockets [Kimura et al, 1973], and the conclusion was that field-aligned ducts stretching down to the rocket altitudes (•300 km) did not exist, at least during the rocket flights at •20 ø latitude. Furthermore, Kimura [1971] has found a new kind of whistler phenomena, drifting whistler cutoff phenomena (striations), on board the Pogo satellites, which can be interpreted in terms of a frequency dependence for the nonducted ray paths.…”

Section: Propagation Of Nighttime Whistlersmentioning

confidence: 99%

On the propagation of low‐latitude whistlers

Hayakawa¹,

Tanaka²

1978

Reviews of Geophysics

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We review here the recent works on low‐latitude whistler propagation based on ground measurements with a reference to space observations and point out the role of low‐latitude ground whistlers in the general study of whistler propagation. Then we identify the main unsolved problems of low‐latitude whistlers: (1) whether or not ground whistlers propagate along field lines, (2) the characteristics of transmission through the ionosphere, and (3) the properties of low‐latitude whistler ducts (formation and decay times) and their structure. These fundamental problems also concern high‐latitude whistlers, but they have less influence, since the rate of duct occurrence is higher and the duct trapping is much easier at high latitudes. On the other hand, considering that the smaller dip angle of the geomagnetic field at low latitudes makes the duct trapping and the ionospheric transmission very hard and that the rate of duct occurrence itself is not so high, we can say that low‐latitude ground whistlers have suffered severe conditions during the course of their propagation. In other words, the fuller study of low‐latitude whistlers will contribute to solving the most poorly understood problem: how the whistler propagates upward from its source, excites ducts, and leaks from ducts, penetrating to the ground. Furthermore, the characteristics of whistler ducts may be studied effectively by using low‐latitude whistlers. Hence these questions should be investigated during this International Magnetospheric Study period.

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Section: Propagation Of Nighttime Whistlersmentioning

confidence: 99%

On the propagation of low‐latitude whistlers

Hayakawa¹,

Tanaka²

1978

Reviews of Geophysics

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Waves and wave-particle interactions in the magnetosphere: A review

Gendrin¹

1975

Space Sci Rev

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Recent space observations of waves, both electromagnetic and electrostatic, are reviewed and the role which they can play in the dynamics of magnetospheric particles is stressed. Wave particle interactions (WPI) in the exo-and intra-plasmaspheric media depend on the exact process of particle injection under the influence of magnetospheric electric fields, and on the spatial distribution of the cold plasma particles; these two aspects of the problem are studied to some extent. The concepts of optimum cold plasma density, critical energy, limiting flux, marginal stability, steady-state equilibrium are critically discussed. The non-linear aspects -both experimental and theoretical -of WPI's are reviewed and a special section is devoted to active experiments in space. An attempt is made to outline which kind of experiments could be made at high-latitudes, in conjunction with IMS spacecrafts, in order to arrive at a better understanding of magnetospheric processes involving waves and particles.

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