Early trimpi events from lightning-induced electric fields in the ionosphere: An alternative explanation. (Reannouncement with new availability information)
Technical Report
·
OSTI ID:166837
Two classes of Trimpi modulation of VLF signals in the Earth-ionosphere waveguide have been identified in the literature. The more common type occurs 1 s or more after causative lightning strokes, the second in less than 100 ms. The authors explore the possibility that these early Trimpi events result from lightning-generated, electric field impulses lowering the mirror altitudes of trapped electrons. To overcome the mirror force on energetic electrons, upward-directed electric fields with strength of a few tens of mV/m are required. This is well within the range of electric field observed on sounding rockets above thunderstorms.
- Research Organization:
- Phillips Lab., Hanscom AFB, MA (United States)
- OSTI ID:
- 166837
- Report Number(s):
- AD-A-248611/6/XAB; PL-TR-92-2075; TRN: 53520028
- Resource Relation:
- Other Information: PBD: 1992
- Country of Publication:
- United States
- Language:
- English
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