Ion-reflection of downward-propagating whistlers at low latitudes
Abstract
The real time a.c. (10-1500 Hz) electric field measurements, received on 2 May 1967 when the Satellite OV1-10 (altitude about 700 km) moved from 0° to 20° N geomagnetic latitude, are presented. Several long fractional hop whistlers, strongly influenced by ions, were observed. The main findings are: For downward propagating whistlers a frequency band is reflected. The width and the location of this band are latitude dependent. Whistler-pairs separated in time by 0.15 sec and with a 15 per cent difference in dispersion were observed. These pairs are probably generated by the same lightning stroke and propagate along different ray paths. Whistlers propagating on higher L-shells seem to be less connected to the magnetic fieldlines than those on lower L-shells. Resonance damping may be important for a limited frequency band.
- Publication:
-
Journal of Atmospheric and Terrestrial Physics
- Pub Date:
- December 1970
- DOI:
- 10.1016/0021-9169(70)90093-0
- Bibcode:
- 1970JATP...32.1983E