Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comparison of EOP and scale parameters estimated from the three simultaneous CONT17 VLBI observing networks
https://orcid.org/0000-0002-5418-0655
Abstract Every three years, the International VLBI Service for Geodesy and Astrometry (IVS) has carried out a continuous observing campaign (CONT) with the goal of demonstrating state-of-the art Very Long Baseline Interferometry (VLBI) observing since 2002. In 2017, the campaign was unique in two respects: three independent networks ran simultaneously and one of the networks was a demonstration of new VLBI Global Observing System (VGOS) technology. Two 14-station legacy station networks, CONT17-L1 and CONT17-L2 observed in S/X mode and the third network, CONT17-VGOS, consisted of five stations observing in VGOS broadband mode. We investigated the differences between Earth Orientation Parameters (EOPs) and scale parameters estimated from the simultaneous observing sessions of the three networks. Prior studies could not determine VLBI EOP precision or VLBI network biases within the VLBI technique. For CONT17, EOP (X-pole, Y-pole, and UT1) biases between the CONT17-L2 and CONT17-L1 networks were $$-11\pm 12$$$$\mu $$as, $$-19\pm 13$$$$\mu $$as, $$-1.1\pm 1.0$$$$\mu $$s, which are at the 1-sigma level. X-pole, Y-pole, and UT1 biases between the CONT17-VGOS and CONT17-L1 networks were $$-108\pm 24$$$$\mu $$as, $$-17\pm 23$$$$\mu $$as, $$1.4\pm 0.6$$$$\mu $$s. Three corner hat analysis of the CONT17-L1, CONT17-L2, and Global Navigation Satellite System (GNSS) series yielded X and Y polar motion precisions of CONT17-L1: 19.8 $$\mu $$as, 22.4 $$\mu $$as; CONT17-L2: 41.0 $$\mu $$as, 35.2 $$\mu $$as; GNSS: 19.8 $$\mu $$as, 15.0 $$\mu $$as. Session scale parameter precisions of the CONT17-L1 and CONT17-L2 networks based on the standard deviation of their respective scale series are 0.45 ppb and 0.30 ppb. Baseline length repeatabilities for each of the networks indicate that the length precision versus length of the VGOS network is about 0.4 ppb compared to 0.5 ppb for the CONT17-L2 network and 0.6 ppb for the CONT17-L1 network for baselines of length less than 10,000 km.
Comparison of EOP and scale parameters estimated from the three simultaneous CONT17 VLBI observing networks
https://orcid.org/0000-0002-5418-0655
Abstract Every three years, the International VLBI Service for Geodesy and Astrometry (IVS) has carried out a continuous observing campaign (CONT) with the goal of demonstrating state-of-the art Very Long Baseline Interferometry (VLBI) observing since 2002. In 2017, the campaign was unique in two respects: three independent networks ran simultaneously and one of the networks was a demonstration of new VLBI Global Observing System (VGOS) technology. Two 14-station legacy station networks, CONT17-L1 and CONT17-L2 observed in S/X mode and the third network, CONT17-VGOS, consisted of five stations observing in VGOS broadband mode. We investigated the differences between Earth Orientation Parameters (EOPs) and scale parameters estimated from the simultaneous observing sessions of the three networks. Prior studies could not determine VLBI EOP precision or VLBI network biases within the VLBI technique. For CONT17, EOP (X-pole, Y-pole, and UT1) biases between the CONT17-L2 and CONT17-L1 networks were $$-11\pm 12$$$$\mu $$as, $$-19\pm 13$$$$\mu $$as, $$-1.1\pm 1.0$$$$\mu $$s, which are at the 1-sigma level. X-pole, Y-pole, and UT1 biases between the CONT17-VGOS and CONT17-L1 networks were $$-108\pm 24$$$$\mu $$as, $$-17\pm 23$$$$\mu $$as, $$1.4\pm 0.6$$$$\mu $$s. Three corner hat analysis of the CONT17-L1, CONT17-L2, and Global Navigation Satellite System (GNSS) series yielded X and Y polar motion precisions of CONT17-L1: 19.8 $$\mu $$as, 22.4 $$\mu $$as; CONT17-L2: 41.0 $$\mu $$as, 35.2 $$\mu $$as; GNSS: 19.8 $$\mu $$as, 15.0 $$\mu $$as. Session scale parameter precisions of the CONT17-L1 and CONT17-L2 networks based on the standard deviation of their respective scale series are 0.45 ppb and 0.30 ppb. Baseline length repeatabilities for each of the networks indicate that the length precision versus length of the VGOS network is about 0.4 ppb compared to 0.5 ppb for the CONT17-L2 network and 0.6 ppb for the CONT17-L1 network for baselines of length less than 10,000 km.
Comparison of EOP and scale parameters estimated from the three simultaneous CONT17 VLBI observing networks
https://orcid.org/0000-0002-5418-0655
Abstract Every three years, the International VLBI Service for Geodesy and Astrometry (IVS) has carried out a continuous observing campaign (CONT) with the goal of demonstrating state-of-the art Very Long Baseline Interferometry (VLBI) observing since 2002. In 2017, the campaign was unique in two respects: three independent networks ran simultaneously and one of the networks was a demonstration of new VLBI Global Observing System (VGOS) technology. Two 14-station legacy station networks, CONT17-L1 and CONT17-L2 observed in S/X mode and the third network, CONT17-VGOS, consisted of five stations observing in VGOS broadband mode. We investigated the differences between Earth Orientation Parameters (EOPs) and scale parameters estimated from the simultaneous observing sessions of the three networks. Prior studies could not determine VLBI EOP precision or VLBI network biases within the VLBI technique. For CONT17, EOP (X-pole, Y-pole, and UT1) biases between the CONT17-L2 and CONT17-L1 networks were $$-11\pm 12$$$$\mu $$as, $$-19\pm 13$$$$\mu $$as, $$-1.1\pm 1.0$$$$\mu $$s, which are at the 1-sigma level. X-pole, Y-pole, and UT1 biases between the CONT17-VGOS and CONT17-L1 networks were $$-108\pm 24$$$$\mu $$as, $$-17\pm 23$$$$\mu $$as, $$1.4\pm 0.6$$$$\mu $$s. Three corner hat analysis of the CONT17-L1, CONT17-L2, and Global Navigation Satellite System (GNSS) series yielded X and Y polar motion precisions of CONT17-L1: 19.8 $$\mu $$as, 22.4 $$\mu $$as; CONT17-L2: 41.0 $$\mu $$as, 35.2 $$\mu $$as; GNSS: 19.8 $$\mu $$as, 15.0 $$\mu $$as. Session scale parameter precisions of the CONT17-L1 and CONT17-L2 networks based on the standard deviation of their respective scale series are 0.45 ppb and 0.30 ppb. Baseline length repeatabilities for each of the networks indicate that the length precision versus length of the VGOS network is about 0.4 ppb compared to 0.5 ppb for the CONT17-L2 network and 0.6 ppb for the CONT17-L1 network for baselines of length less than 10,000 km.
Comparison of EOP and scale parameters estimated from the three simultaneous CONT17 VLBI observing networks
MacMillan, D. S. (Autor:in)
Journal of Geodesy ; 96
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch