Modeling HF Doppler effects of geomagnetic sudden commencements
Journal Article
·
· J. Geophys. Res., v. 81, no. 1, pp. 175-182
A model has been proposed to explain the ionospheric effects of the sudden commencements as measured with a Doppler sounder. The model consists of two different sources of electric fields generated in the ionosphere during the sudden commencement: a westward electromagnetically induced electric field generated in the F region due to the change of magnetic field and an eastward dynamo electrostatic field set up in the dynamo region and transferred along the geomagnetic field lines to the F region. The change of Doppler frequency shifts during the sudden commencement (ssc) is due to the vertical motion of the charged particles forced by these two opposing electric fields. The theoretical Doppler shifts were calculated on the basis of this model, and four observed ssc's and scf's were used to check the validity of the model. (AIP)
- Research Organization:
- Telecommunications Laboratories, Ministry of Communications, Chung-Li, Taiwan, Republic of China
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-027127
- OSTI ID:
- 4005308
- Journal Information:
- J. Geophys. Res., v. 81, no. 1, pp. 175-182, Journal Name: J. Geophys. Res., v. 81, no. 1, pp. 175-182; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Geomagnetic sudden impulses and storm sudden commencements - A note on terminology
Penetration of polar electric fields to the nightside dip equator at times of geomagnetic sudden commencements
ON GEOMAGNETIC SUDDEN COMMENCEMENTS, SUDDEN IMPULSES, AND STORM DURATIONS
Journal Article
·
Wed Oct 31 23:00:00 EST 1990
· EOS, Transactions, American Geophysical Union; (United States)
·
OSTI ID:5510882
Penetration of polar electric fields to the nightside dip equator at times of geomagnetic sudden commencements
Journal Article
·
Fri Oct 01 00:00:00 EDT 1993
· Journal of Geophysical Research
·
OSTI ID:75635
ON GEOMAGNETIC SUDDEN COMMENCEMENTS, SUDDEN IMPULSES, AND STORM DURATIONS
Journal Article
·
Mon Sep 01 00:00:00 EDT 1952
· J. Geophys. Research
·
OSTI ID:4763045