Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.4257p&link_type=abstract
Journal of Geophysical Research, vol. 84, Aug. 1, 1979, p. 4257-4266. Navy-supported research
Physics
1
Earth Magnetosphere, Geomagnetic Pulsations, Magnetometers, Power Spectra, Satellite Observation, Atmospheric Models, Data Correlation, Data Reduction, Dodge Satellite, Ground Stations, Low Frequencies, Magnetic Measurement, Polarization Characteristics, Spectrum Analysis
Scientific paper
The analysis of the magnetic-field observations from Dodge satellite magnetometer data at L = 6.25 earth radii shows dominant low-frequency waves (Pc 3 and Pc 4) in three major frequency bands: 40-35, 25-20, and 8-12 mHz. During the observation period of July-August 1968 the 25- to 20-mHz band always showed high spectral density, indicating the most dominant wave frequency. Similar results were obtained in the analysis of ground magnetometer observations from L = 6.9 to 1.5 near the local time of the satellite observations. The simultaneous observations of the waves at low as well as high L values are important in wave-propagation models. This pattern of observations and the polarizations of certain wave events which occurred when Dodge was close to the ground observatory are discussed in terms of contemporary theoretical models.
Greaves R. J.
Patel Vithal L.
Potemra Thomas A.
Wahab S. A.
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