Results 21 to 30 of about 5,641 (197)
Geofísica Internacional, 1994 Se reporta una comparación regional entre el International Geomagnetic Reference Field (IGRF) para 1990 y medidas geomagneticas de campo obtenidas en 51 localidades del pais.
E. Hernández-Quintero +6 more
doaj +1 more source
Bootstrapping Swarm and observatory data to generate candidates for the DGRF and IGRF-13
Earth, Planets and Space, 2020 As posted by the Working Group V of the International Association of Geomagnetism and Aeronomy (IAGA), the 13th generation of the International Geomagnetic Reference Field (IGRF) has been released at the end of 2019.
F. Javier Pavón-Carrasco +5 more
doaj +1 more source
Earth, Planets and Space, 2020 The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13th IGRF that stems from a sequential ensemble
Sabrina Sanchez +2 more
doaj +1 more source
Comparison of candidate IGRF models.
Journal of geomagnetism and geoelectricity, 1982 Three candidate models for the International Geomagnetic Reference Field (IGRF) for the years 1965, 1970, 1975, and 1980 are evaluated using magnetic observatory and satellite data. The models were submitted by the USGS, the IGS, and NASA. Comparison based on annual means data shows the differences between models to be small, although the NASA model ...
R. A. LANGEL, R. H. ESTES
openaire +2 more sources
Can core-surface flow models be used to improve the forecast of the Earth's main magnetic field? [PDF]
, 2008 [1] Geomagnetic main field models used for navigation are updated every 5 years and contain a forecast of the geomagnetic secular variation for the upcoming epoch. Forecasting secular variation is a difficult task.
Alexandrescu +46 more
core +5 more sources
Evidence-based uncertainty estimates for the International Geomagnetic Reference Field
Earth, Planets and Space, 2022 The International Geomagnetic Reference Field (IGRF) is a multi-institute model of the Earth’s magnetic field, compactly described by sets of up to 195 spherical harmonic (Gauss) coefficients to degree and order 13, which allows the continuous evaluation
Ciarán D. Beggan
doaj +1 more source
IZMIRAN candidate field model for IGRF-13
Earth, Planets and Space, 2021 The International Geomagnetic Reference Field (IGRF) model is a combination of the several models developed by independent groups of scientists using different approaches for the selection of input data and methods for calculating harmonic coefficients ...
Valeriy G. Petrov, Tatyana N. Bondar
doaj +1 more source
Parent magnetic field models for the IGRF-12GFZ-candidates [PDF]
Earth, Planets and Space, 2015 We propose candidate models for IGRF-12. These models were derived from parent models built from 10 months of Swarm satellite data and 1.5 years of magnetic observatory data. Using the same parameterisation, a magnetic field model was built from a slightly extended satellite data set.
Lesur, Vincent +5 more
openaire +5 more sources
Jurnal Ilmiah Pendidikan Fisika Al-Biruni, 2015 Tujuan dari penelitian ini adalah untuk mengetahui potensi panas bumi dan sebaran air panas di sekitar Kelurahan Tobololo dan Kelurahan Sulamadaha, Pulau Ternate bagian utara.
Abdul Haris Rajab +2 more
doaj +1 more source
Earth, Planets and Space, 2020 We have submitted a secular variation (SV) candidate model for the thirteenth generation of International Geomagnetic Reference Field model (IGRF-13) using a data assimilation scheme and a magnetohydrodynamic (MHD) dynamo simulation code.
Takuto Minami +8 more
doaj +1 more source