Results 81 to 90 of about 5,641 (197)
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 ...
openaire +2 more sources
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.
B. P. SINGH +4 more
openaire +2 more sources
A satellite study of dayside auroral conjugacy [PDF]
Annales Geophysicae, 1995 A study of dayside auroral conjugacy has been done using the cleft/boundary layer auroral particle boundaries observed by the DMSP-F7 satellite in the southern hemisphere and the global UV auroral images taken by the Viking spacecraft in the northern ...
H. B. Vo +4 more
doaj +1 more source
Improved dynamic geomagnetic rigidity cutoff modeling: testing predictive accuracy [PDF]
, 2007 . In the polar atmosphere, significant chemical and ionization changes occur during solar proton events (SPE). The access of solar protons to this region is limited by the dynamically changing geomagnetic field.
Clilverd, Mark +3 more
core +1 more source
Abrupt Disappearance of Plasmaspheric Hiss Inside the Magnetic Dip
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract Plasmaspheric hiss plays an important role in radiation belt electron dynamics, and its excitation and propagation have long attracted attention. During a substorm, Van Allen Probe B observed the disappearance of plasmaspheric hiss at the magnetic dip, which was driven by the injection of energetic protons.
Yan Zhuang +6 more
wiley +1 more source
Geomagnetic effects on cosmic ray propagation under different conditions for Buenos Aires and Marambio, Argentina [PDF]
, 2014 The geomagnetic field (Bgeo) sets a lower cutoff rigidity (Rc) to the entry of cosmic particles to Earth which depends on the geomagnetic activity. From numerical simulations of the trajectory of a proton using different models for Bgeo (performed with ...
Dasso, Sergio, Masías-Meza, Jimmy J.
core +1 more source
The Spectrum of the 4-Generation Dirac-Kaehler Extension of the SM
, 2010 We compute the mass spectrum of the fermionic sector of the Dirac-Kaehler extension of the SM (DK-SM) by showing that there exists a Bogoliubov transformation that transforms the DK-SM into a flavor U(4) extension of the SM (SM-4) with a particular ...
Abbas +20 more
core +1 more source
International Geomagnetic Reference Field: the 12th generation [PDF]
, 2015 The 12th generation of the International Geomagnetic Reference Field (IGRF) was adopted in December 2014 by the Working Group V-MOD appointed by the International Association of Geomagnetism and Aeronomy (IAGA).
Alken, Patrick +47 more
core +4 more sources
Enhancing Low‐Latitude Ionospheric Irregularity Prediction With Generalized Linear Models
Space Weather, Volume 24, Issue 3, March 2026.Abstract The ionosphere poses challenges for accurate forecasting due to its complexity and variability. Irregularities in the lower ionosphere are influenced by local time, season, geographic location, solar activity and space weather, complicating precise predictions.
Alysson Brhian +4 more
wiley +1 more source
Annals of Geophysics, 2013 The results of geomagnetic field components of the renewed Ukrainian repeat stations (RS) network are presented. The methods of absolute geomagnetic and astro-geodetic measurements are described.
Valentyn Maksymchuk +4 more
doaj +1 more source