Global Mapping Function (GMF): A new empirical mapping function based on numerical weather model data

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dc.contributor.authorTregoning, Paul
dc.contributor.authorBoehm, J.
dc.contributor.authorNiell, A
dc.contributor.authorSchuh, H.
dc.date.accessioned2015-12-07T22:21:13Z
dc.date.issued2006
dc.date.updated2015-12-07T08:55:19Z
dc.description.abstractTroposphere mapping functions are used in the analyses of Global Positioning System and Very Long Baseline Interferometry observations to map a priori zenith hydrostatic and wet delays to any elevation angle. Most analysts use the Niell Mapping Function (NMF) whose coefficients are determined from site coordinates and the day of year. Here we present the Global Mapping Function (GMF), based on data from the global ECMWF numerical weather model. The coefficients of the GMF were obtained from an expansion of the Vienna Mapping Function (VMF1) parameters into spherical harmonics on a global grid. Similar to NMF, the values of the coefficients require only the station coordinates and the day of year as input parameters. Compared to the 6-hourly values of the VMF1 a slight degradation in short-term precision occurs using the empirical GMF. However, the regional height biases and annual errors of NMF are significantly reduced with GMF.
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/1885/19938
dc.publisherAmerican Geophysical Union
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/0094-8276/..."Publisher's version/PDF must be used in Institutional Repository 6 months after publication" from SHERPA/RoMEO site (as at 9/11/17).
dc.sourceGeophysical Research Letters
dc.subjectKeywords: Global positioning system; Interferometry; Mathematical models; Troposphere; Global mapping function; Niell mapping function; Very long baseline interferometry; Weather forecasting; mapping; numerical model; weather forecasting
dc.titleGlobal Mapping Function (GMF): A new empirical mapping function based on numerical weather model data
dc.typeJournal article
dcterms.accessRightsOpen Access
local.bibliographicCitation.issue7
local.bibliographicCitation.startpageL07304
local.contributor.affiliationTregoning, Paul, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBoehm, J., Vienna University of Technology
local.contributor.affiliationNiell, A, LIGO Massachusetts Institute of Technology
local.contributor.affiliationSchuh, H., Vienna University of Technology
local.contributor.authoremailu9518503@anu.edu.au
local.contributor.authoruidTregoning, Paul, u9518503
local.description.notesImported from ARIES
local.identifier.absfor040199 - Atmospheric Sciences not elsewhere classified
local.identifier.absfor090902 - Geodesy
local.identifier.ariespublicationu4441299xPUB10
local.identifier.citationvolume33
local.identifier.doi10.1029/2005GL025546
local.identifier.scopusID2-s2.0-33646832237
local.identifier.uidSubmittedByu4441299
local.type.statusPublished Version

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