Results 81 to 90 of about 545 (160)
Space Weather, Volume 24, Issue 7, July 2026.Abstract The classical Equatorial Ionization Anomaly (EIA) is characterized by two separated plasma accumulation regions off the geomagnetic equator and a plasma depletion region in between. Deviations from the typical double‐crest structure, including the single crest and multiple crests, have been observed.
Ping Zhou +3 more
wiley +1 more source
Evaluation of IGRF 1980 candidate models.
Journal of geomagnetism and geoelectricity, 1982 The IGRF candidate models for the main field 1980 and the secular variation 1980-85 are compared with observations. The IGS and USGS secular variation models agree better with the global set of secular variation estimates than does the NASA model. The NASA and USGS models represent more closely than does the IGS model a spatially limited set of 1980 ...
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Local gravity network as a reference station for the IGRF
, 2019 The newly created International Gravity Reference Frame (IGRF) will heavily rely on widely distributed reference stations. It is required that at any time of the year the instantaneous value of gravity will be available at such reference stations.
Ilya, Oshchepkov, Sermyagin Roman
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An evaluation of candidate geomagnetic field models for IGRF 2000 [PDF]
Earth, Planets and Space, 2014 A global evaluation is made of the four candidate models for IGRF 2000 (main field and secular variation) that were submitted to the IAGA Working Group V-8 by the deadline in February 1999. A description of the data used and the method of modelling is summarised for each candidate model.
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Assessment of IGRF Candidate Models over the Indian Region.
Journal of geomagnetism and geoelectricity, 1992 The five candidate models for DGRF 1985 and IGRF 1990 developed by IZMIRAN, US/UK, USGS and two models of GSFC, are assessed over the Indian region, using observatory and repeat survey stations data for period 1985-1990. The results indicate that no model is dramatically better than the other.
SINGH, B. P. +4 more
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Unusual behaviour of the IGRF during the 1945–1955 period [PDF]
Earth, Planets and Space, 2014 The International Geomagnetic Reference Field (IGRF) for 1900–2000 is testedin this paper. A peculiar behaviour is found in the time variations of higher-degree coefficients of the IGRF models. During the 1945–1955 period the spherical harmonic coefficients g n m and h n
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Definitive IGRF models for 1945, 1950, 1955, and 1960.
Journal of geomagnetism and geoelectricity, 1988 Definitive internal geomagnetic field models are obtained for the epochs 1945, 1950, 1955, and 1960, with the solution including local biases for the fixed observatories. In order to derive a priori models for the epochs, the International Geomagnetic Reference Field (12/83) model (based on Magsat data) was projected backward in time using a spline fit
LANGEL, R. A. +5 more
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Magnetic Field Maps for IGRF 1995
Journal of geomagnetism and geoelectricity, 1997 Macmillan, Susan, Barton, Charles E.
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IGRF, International Geomagnetic Reference Field [PDF]
, 2007 Macmillan, Susan +1 more
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Iron Oxide-Based Surface-Enhanced Raman Spectroscopy Bioprobes for Detecting Tumor Cells in Serous Effusion. [PDF]
Anal ChemGuo J +12 more
europepmc +1 more source