Beggan, Ciaran

Chulliat, Amaud

Finlay, Chris

Hulot, Gauthier

Lesur, Vincent

Olsen, Nils

Sabaka, Terence

Almost one year of data from ESA's Swarm constellation mission are used to derive a model of the Earth’s magnetic field and its time variation (secular variation). The model describes contributions from the core and lithosphere as well as large-scale contributions from the magnetosphere (and its Earth-induced counterpart). We use data from geomagnetic quiet times (Kp less than 2o, time change of Dst-index less than 2 nT/hr) and dark regions (sun below horizon) and co-estimate the Euler angles describing the rotation between the vector magnetometer instrument frame and the North-East-Center (NEC) frame. In addition to the magnetic field observations provided by each of the three Swarm satellites we include the East-west magnetic gradient information provided by the lower Swarm satellite pair, thereby explicitly taking advantage of the constellation aspect of Swarm. We assess the spatial and temporal model resolution that can be obtained from one year of Swarm satellite data by comparison with other recent models that also include non-Swarm magnetic observations

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 20, 2017The Swarm Initial Field Model – a Model of the Earth’s Magnetic Field for 2014Determined From One Year of Swarm Satellite Constellation DataOlsen, Nils; Hulot, Gauthier; Lesur, Vincent; Finlay, Chris; Beggan, Ciaran; Chulliat, Amaud ; Sabaka,TerencePublication date:2014Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Olsen, N., Hulot, G., Lesur, V., Finlay, C., Beggan, C., Chulliat, A., & Sabaka, T. (2014). The Swarm Initial FieldModel – a Model of the Earth’s Magnetic Field for 2014 Determined From One Year of Swarm SatelliteConstellation Data. Abstract from 2014 AGU Fall Meeting, San Francisco, CA, United States. Friday, December 19, 2014 08:00 AM - 12:20 PMMoscone SouthPoster HallAlmost one year of data from ESA's Swarm constellation mission are used to derive a model of the Earth’s magnetic field and itstime variation (secular variation). The model describes contributions from the core and lithosphere as well as large-scalecontributions from the magnetosphere (and its Earth-induced counterpart). We use data from geomagnetic quiet times (Kp lessthan 2o, time change of Dst-index less than 2 nT/hr) and dark regions (sun below horizon) and co-estimate the Euler anglesdescribing the rotation between the vector magnetometer instrument frame and the North-East-Center (NEC) frame. In addition tothe magnetic field observations provided by each of the three Swarm satellites we include the East-west magnetic gradientinformation provided by the lower Swarm satellite pair, thereby explicitly taking advantage of the constellation aspect of Swarm.We assess the spatial and temporal model resolution that can be obtained from one year of Swarm satellite data by comparisonwith other recent models that also include non-Swarm magnetic observations.AuthorsNils OlsenTechnical University of Denmark - SpaceGauthier HulotInstitut de Physique du Globe de ParisVincent LesurHelmholtz Centre Potsdam GFZ German Research Centre forGeosciencesChristopher FinlayDTU SpaceCiaran BegganBritish Geological Survey KeyworthArnaud ChulliatNational Geophysical Data CenterTerence SabakaNASA Goddard Space Flight CenterView Related EventsSession: ESA's Swarm Mission, One Year in Space III PostersSection/Focus Group: Geomagnetism and PaleomagnetismDay: Friday, December 19, 2014Back to: Christopher FinlayGP51A-3702 The Swarm Initial Field Model – a Model of the Earth’s Magnetic Field for 2014 Determined From One Year ofSwarm Satellite Constellation Data2014 AGU Fall Meeting https://agu.confex.com/agu/fm14/meetingapp.cgi#Paper/226551 of 1 2/6/15 5:27 PM

The Swarm Initial Field Model – a Model of the Earth’s Magnetic Field for 2014 Determined From One Year of Swarm Satellite Constellation Data

http://orbit.dtu.dk/ws/files/105636134/Olsen_2014_AGU_1_.pdf

The Swarm Initial Field Model – a Model of the Earth’s Magnetic Field for 2014 Determined From One Year of Swarm Satellite Constellation Data

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology