Physics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48...83o&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, Jan. 1986, p. 83-95.
Physics
2
Geomagnetic Pulsations, Low Frequencies, Radio Waves, Solar Wind, International Sun Earth Explorer 2, Interplanetary Magnetic Fields, Magnetometers, Spaceborne Experiments
Scientific paper
Three classes of low frequency waves (period range 20-80 s) were identified using data from the UCLA fluxgate magnetometer experiment on board the ISEE 2 spacecraft. These are continuous pulsations similar in type to Pc 3, band-limited oscillations distinguished by mixed period fluctuations, and relatively isolated wave bundles. The waves were preferentially observed when the interplanetary magnetic field (IMF) direction was sunward and were most common when the cone angle, i.e., the angle between IMF and the sun-earth line was often between 15 deg and 45 deg. Their frequency is proportional to the IMF magnitude. Comparison between the waves observed on board the ISEE 2 spacecraft and the Pc 3-4 recorded simultaneously at a midlatitude ground station, Oulu (L = 4.5), showed that similarity of spectra of the waves in the spacecraft and on the ground was very rare, and that correspondence between the events in space and on the ground was extremely low.
Odera T. J.
Stuart W. F.
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