Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances

Details Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9621105l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 21,105-21,113.

Physics

40

Earth Magnetosphere, Geomagnetic Pulsations, Magnetic Resonance, Magnetohydrodynamic Waves, Plasmasphere, Tropical Regions, Cavities, Eigenvalues, Harmonics, Mathematical Models, Power Spectra

Scientific paper

Observations of Pi 2 pulsations at the Chung-Li station are presented and interpreted. The geomagnetic latitude of this station is 13.8 deg N (L = 1.06). The power spectra of the observed Pi pulsations show both single and multiple peaks during daytime and nighttime. Typical periods of Pi pulsations observed are 30-100 s. The observed frequency ratios of the first three harmonics are found to be about 1:1.5:2. Large-amplitude pulsations are more frequently observed during local noon and midnight. It is found that the presence of the plasma outside the plasmapause can significantly modify the amplitude and eigenfrequencies of the waves excited in the resonance cavity. The eigenfrequencies of the cavity waves also depend on the position and the density drop at the plasmapause. The eigenfrequencies as a function of the azimuthal wave number k(y) are also studied. It is found that for small k(y), the ratios of the eigenfrequencies of the first three harmonics in the radial direction calculated from model A are consistent with the observed values.

Affiliated with

Also associated with

No associations

Rating

Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of Pi 2 pulsations at a very low latitude (L = 1.06) station and magnetospheric cavity resonances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1539760