NDLI: Data reduction of Croatian geomagnetic repeat stations surveys by using the spherical elementary current systems method

Content Provider	Springer Nature Link
Author	Vujić, Eugen Brkić, Mario
Copyright Year	2015
Abstract	The geomagnetic declination, inclination and total field data surveyed at the Croatian Geomagnetic Repeat Stations Network were reduced to 2008.5, 2009.5 and 2010.5 epochs by a well-known observatory-based and a proposed method, in instances when an influence of the differences of secular variations at a repeat station and at an observatory were not taken into account. The motivation came from distances and distribution of the nearby geomagnetic observatories. A technique for expanding vector systems on a sphere into basis functions, known as the Spherical Elementary Current System (SECS) method, was applied to obtain separation of the geomagnetic field variations into external and internal parts, over Croatia and surrounding countries. The aim of this work is to propose the SECS method for determination of the annual mean values of north, east and vertical components of Earth’s magnetic field at the Croatian repeat stations. The results of the SECS method were compared to an observatory-based method which assumes that the variations of components about their annual mean values at a repeat station are equal to those at a particular nearby reference observatory. For reducing a repeat station data by this simple method the Fürstenfeldbruck, Grocka and Tihany observatories were used, while for the SECS method additional three observatories were employed. The reduction methods were found comparable, while in the majority of instances the SECS method demonstrated smaller standard deviations of the components’ annual means. Besides, the annual mean values of the vertical component had the highest accuracies for both methods. The results indicate that the SECS method can be an acceptable method for data reduction to annual mean values.
Starting Page	635
Ending Page	646
Page Count	12
File Format	PDF
ISSN	00393169
Journal	Studia Geophysica et Geodaetica
Volume Number	59
Issue Number	4
e-ISSN	15731626
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-08-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	geomagnetic observatory geomagnetic network geomagnetic annual means Geophysics/Geodesy Structural Geology Atmospheric Sciences
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Geophysics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Analysis of Croatian geomagnetic repeat station surveys in 2004 and 2007

Estimation of effect of unequal secular variation on geomagnetic data reduction

Detailed analysis of the geomagnetic ground survey performed in middle-northern Croatia over the time interval 2003–2005

Contributions to the Ring Current Energy During Geomagnetic Storms

Geomagnetic activity and the North Atlantic Oscillation

Geomagnetic activity and the global temperature

Ionospheric effetcs of an intense geomagnetic storm

Absolute geomagnetic paleointensity as recorded by ∼1.09 Ga Lake Shore Traps (Keweenaw Peninsula, Michigan)

Error analysis for European IGS stations

Data reduction of Croatian geomagnetic repeat stations surveys by using the spherical elementary current systems method

Similar Documents

Analysis of Croatian geomagnetic repeat station surveys in 2004 and 2007

Estimation of effect of unequal secular variation on geomagnetic data reduction

Detailed analysis of the geomagnetic ground survey performed in middle-northern Croatia over the time interval 2003–2005

Contributions to the Ring Current Energy During Geomagnetic Storms

Geomagnetic activity and the North Atlantic Oscillation

Geomagnetic activity and the global temperature

Ionospheric effetcs of an intense geomagnetic storm

Absolute geomagnetic paleointensity as recorded by ∼1.09 Ga Lake Shore Traps (Keweenaw Peninsula, Michigan)

Error analysis for European IGS stations

Data reduction of Croatian geomagnetic repeat stations surveys by using the spherical elementary current systems method