Authors / CoAuthors
Moore, M. | Ruddick, R. | Johnston, G.
Abstract
A key element to the determination of International Reference Frame (ITRF) is a sufficient number of well distributed co-location sites between the major geodetic observation techniques SLR, VLBI and GPS. Today GPS plays a major role connecting both techniques at the ITRF combination stage. However any GPS bias in a co-located site may have an impact on the ITRF quality and its defining scale and origin parameters. For GPS the scale is highly dependent on ground and satellite PCV. Therefore the presence of an uncalibrated radome at a collocated station is likely to have an impact on the scale estimation. The International GNSS Service (IGS) station YAR2, located at Yarragadee, has an uncalibrated radome 'JPLA' and is collocated with a SLR observatory with a reported residual of 14mm in height. This contribution looks at analyses of recent local tie surveys carried out at Yarragadee, which included a week of GPS observations at YAR2 without the radome installed, as well as additional observations on other local tie monuments. In particular we give an estimation of the bias that is introduced by the unmodelled JPLA radome, and look at other possible sources of discrepancy between SLR and GPS derived ITRF solutions.
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nonGeographicDataset
eCat Id
70979
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- External Publication
- ( Theme )
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- geodesy
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2010-01-01T00:00:00
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geoscientificInformation
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