K measurements by computer

Details K measurements by computer K measurements by computer

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39.1447v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 39, Nov.-Dec. 1977, p. 1447-1450.

Physics

2

Computer Techniques, Data Acquisition, Geomagnetic Pulsations, Indexes (Ratios), Magnetic Measurement, Data Recording, Digital Simulation, Digital Systems, Geomagnetism, High Pass Filters, Magnetic Recording

Scientific paper

Two computer techniques for determining the three-hour-range indices (called K-indices) of geomagnetic activity are described. The first technique relies on a high-pass numerical filter to remove most of the non-K variations from a digital magnetic record. The second is a simulation of the visual scaling method. When applied to routine five-minute digital data, the two techniques yield similar results.

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