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Improving the Swedish quasigeoid by gravity observations on the ice of Lake Vänern
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics. Lantmäteriet Swedish Mapping, Sweden.
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2014 (English)In: International Association of Geodesy Symposia, 2014, 171-177 p.Conference paper (Refereed)
Abstract [en]

One of the key activities in Geodesy 2010, the Swedish strategic plan for geodetic activities during the period 2011–2020, is the restoration of the gravity network and data in order to improve the accuracy of the national quasigeoid model. One weak point has been that very few gravity observations have been available over Lake Vänern, Sweden’s largest lake. During the extremely cold winters 2010 and 2011, the ice became sufficiently thick to make ice observation of gravity. The main purpose of this paper is to present the 2011 ice gravity campaign, summarise the experiences made and investigate how much the new ice observations improve the computed quasigeoid model in the area. This is investigated under the assumption that a modern Earth Gravitational Model based on GRACE and GOCE is used. It is found that new ice measurements improve the quasigeoid with a RMS of about 2–3 cm in and around the lake with a maximum improvement of 7 cm.

Place, publisher, year, edition, pages
2014. 171-177 p.
Keyword [en]
Geoid, GOCE, Gravity, Ice, Lake Vänern, Geodesy, Gravitation, Lakes, Cold winter, Gravitational model, New-ice, Strategic plan, Swedishs, Weak points, error correction, gravity field, lake ecosystem, satellite data, strategic approach, Lake Vanern, Sweden
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:kth:diva-168859DOI: 10.1007/978-3-319-10837-7_22ISI: 000358612900022ScopusID: 2-s2.0-84927603061ISBN: 9783319108360OAI: diva2:819968
International Association of Geodesy Symposium on Gravity, Geoid and Height Systems, GGHS 2012, 9 October 2012 through 12 October 2012

QC 20150611

Available from: 2015-06-11 Created: 2015-06-09 Last updated: 2015-08-27Bibliographically approved

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Ågren, Jonas
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Geodesy and Geoinformatics
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