New VLBI2010 scheduling strategies and implications on the terrestrial reference frames
VerfasserSun, Jing ; Böhm, Johannes ; Nilsson, Tobias ; Krásná, Hana ; Böhm, Sigrid ; Schuh, Harald
Erschienen in
Journal of geodesy, 2014, Jg. 88, H. 5, S. 449-461
Published version
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Very long baseline interferometry / Scheduling / TRF / CRF
URNurn:nbn:at:at-ubtuw:3-2309 Persistent Identifier (URN)
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New VLBI2010 scheduling strategies and implications on the terrestrial reference frames [1.56 mb]
Zusammenfassung (Englisch)

In connection with the work for the next generation VLBI2010 Global Observing System (VGOS) of the International VLBI Service for Geodesy and Astrometry, a new scheduling package (Vie_Sched) has been developed at the Vienna University of Technology as a part of the Vienna VLBI Software. In addition to the classical station-based approach it is equipped with a new scheduling strategy based on the radio sources to be observed. We introduce different configurations of source-based scheduling options and investigate the implications on present and future VLBI2010 geodetic schedules. By comparison to existing VLBI schedules of the continuous campaign CONT11, we find that the source-based approach with two sources has a performance similar to the station-based approach in terms of number of observations, sky coverage, and geodetic parameters. For an artificial 16 station VLBI2010 network, the source-based approach with four sources provides an improved distribution of source observations on the celestial sphere. Monte Carlo simulations yield slightly better repeatabilities of station coordinates with the source-based approach with two sources or four sources than the classical strategy. The new VLBI scheduling software with its alternative scheduling strategy offers a promising option with respect to applications of the VGOS.