GOCE gradients in various reference frames and their accuracies

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dc.identifier.uri http://dx.doi.org/10.15488/1920
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1945
dc.contributor.author Müller, Jürgen
dc.date.accessioned 2017-09-14T14:08:57Z
dc.date.available 2017-09-14T14:08:57Z
dc.date.issued 2003
dc.identifier.citation Müller, J.: GOCE gradients in various reference frames and their accuracies. In: Advances in Geosciences 1 (2003), S. 33-38. DOI: https://doi.org/10.5194/adgeo-1-33-2003
dc.description.abstract The objective of GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) is the determination of the Earth's gravity field with high spatial resolution. The main science sensor (the gradiometer) measures differential accelerations, from which the gravitational gradients, i.e. the matrix of the second derivatives of the gravitational potential, are derived. Some of them (the diagonal components of the gravitational tensor) are observed with highest accuracy, 4 mE/?Hz in a frequency range from 5 mHz to 100 mHz, whereas the off-diagonals are obtained less accurately. The gradients will be observed in the instrument frame, which approximates the along-track oriented, local orbital frame. For the transformation of the gradients in other frames (e.g. in the strictly earth-pointing frame or a local geodetic frame), the transformation parameters (orientation angles) and all components of the gravity tensor have to be known with sufficient accuracy. We show how the elements of the gravitational tensor and their accuracies look like in the various frames as well as their spectral behaviour, if only the GOCE observations are used for the transformation. Only V zz' keeps approximately its original accuracy in all frames discussed, except in the earth-fixed frame ITRF (International Terrestrial Reference Frame). Therefore we recommend to analyse the gradients as 'close' as possible in the observation frame. eng
dc.language.iso eng
dc.publisher Göttingen : Copernicus GmbH
dc.relation.ispartofseries Advances in Geosciences 1 (2003)
dc.rights CC BY-NC-SA 2.5 Unported
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5
dc.subject GOCE mission eng
dc.subject Reference frames eng
dc.subject Satellite gradiometry eng
dc.subject Transformation errors eng
dc.subject acceleration eng
dc.subject Earth eng
dc.subject geodetic network eng
dc.subject gravity field eng
dc.subject satellite mission eng
dc.subject satellite sensor eng
dc.subject spatial resolution eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title GOCE gradients in various reference frames and their accuracies
dc.type article
dc.type Text
dc.relation.issn 16807340
dc.relation.doi https://doi.org/10.5194/adgeo-1-33-2003
dc.bibliographicCitation.volume 1
dc.bibliographicCitation.firstPage 33
dc.bibliographicCitation.lastPage 38
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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