Determination of tropospheric parameters within the new IVS Pilot Project

Schuh, Harald; Boehm, J.; Engelhardt, G.; MacMillan, D. S.; Lanotte, R.; Tomasi, P.; Negusini, Monia; Vereshchagina, I. A.; Gubanov, V. S.; Haas, Rüdiger

doi:10.1007/3-540-27432-4_22

Cited by 4 publications

(5 citation statements)

References 4 publications

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“…The tropospheric biases between GPS and VLBI resulting from the use of relative PCVs correspond well to the results of Schuh and Bo¨hm (2003) who analyzed 11 co-located sites altogether. Their investigations also showed that the bias is always positive, the individual values ranging from +1.4 mm to +13.5 mm (Onsala: +4.8 mm).…”

Section: Impact On Global Gps Solutionssupporting

confidence: 62%

“…At the end of the paper, the influence of antenna PCVs on the biases between total tropospheric zenith delays derived from different space geodetic techniques is discussed. Schuh and Bo¨hm (2003) who analyzed the GPS and VLBI (very long baseline interferometry) derived troposphere parameters for identical times at 11 co-located sites found out that all mean values of the total zenith delays derived by GPS are larger than those derived by VLBI. Haas et al (2003) get similar results for the Onsala Space Observatory from an analysis of long time series of integrated precipitable water vapor (IPWV) from four different techniques (GPS, VLBI, water vapor radiometers (WVRs) and radiosondes).…”

Section: Ralf Schmid Markus Rothacher Daniela Thaller Peter Steigenbementioning

confidence: 94%

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Absolute phase center corrections of satellite and receiver antennas

et al. 2005

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Results of the estimation of azimuth-dependent phase center variations (PCVs) of GPS satellite antennas using global GPS data are presented. Significant variations of up to ±3-4 mm that are demonstrated show excellent repeatability over eight years. The application of the azimuthal PCVs besides the nadir-dependent ones will lead to a further reduction in systematic antenna effects. In addition, the paper focuses on the benefit of a possible transition from relative to absolute PCVs. Apart from systematic changes in the global station coordinates, one can expect the GPS results to be less dependent on the elevation cutoff angle. This, together with the significant reduction of tropospheric zenith delay biases between GPS and VLBI, stands for an important step toward more consistency between different space geodetic techniques.

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Section: Impact On Global Gps Solutionssupporting

confidence: 62%

Section: Ralf Schmid Markus Rothacher Daniela Thaller Peter Steigenbementioning

confidence: 94%

Absolute phase center corrections of satellite and receiver antennas

et al. 2005

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“…Thus VLBI can be used as an independent source, in addition to radiosonde or water vapor radiometer, to assess the quality of the GPS derived atmospheric information. The International VLBI Service for Geodesy and Astrometry (IVS) provides tropospheric products since 2002 [44]. The Australian Long Baseline Array is part of the Australia Telescope National Facility.…”

Section: Surface Meteorological Datamentioning

confidence: 99%

Precipitable Water Vapor Estimates in the Australian Region from Ground-Based GPS Observations

Choy

Wang

Yeh

et al. 2015

Advances in Meteorology

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We present a comparison of atmospheric precipitable water vapor (PWV) derived from ground-based global positioning system (GPS) receiver with traditional radiosonde measurement and very long baseline interferometry (VLBI) technique for a five-year period (2008–2012) using Australian GPS stations. These stations were selectively chosen to provide a representative regional distribution of sites while ensuring conventional meteorological observations were available. Good agreement of PWV estimates was found between GPS and VLBI comparison with a mean difference of less than 1 mm and standard deviation of 3.5 mm and a mean difference and standard deviation of 0.1 mm and 4.0 mm, respectively, between GPS and radiosonde measurements. Systematic errors have also been discovered during the course of this study, which highlights the benefit of using GPS as a supplementary atmospheric PWV sensor and calibration system. The selected eight GPS sites sample different climates across Australia covering an area of approximately 30° NS/EW. It has also shown that the magnitude and variation of PWV estimates depend on the amount of moisture in the atmosphere, which is a function of season, topography, and other regional climate conditions.

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“…Concerning the troposphere, early studies [53] have shown that precision of 1 cm in zenith path delay can be obtained using three satellites (equivalent to 2 mm in Integrated Precipitated Water). More recent studies show that 6 to 8 mm can be obtained when using five satellites during the CONT02 campaign in comparison with VLBI and GPS results [39,40]. However, we must also say that these results can only be obtained after a onemonth delay, making them totally useless for any assimilation in a weather prediction model.…”

Section: Sensing the Atmospherementioning

confidence: 98%

DORIS: From orbit determination for altimeter missions to geodesy

Willis

Jayles

Bar-Sever

2006

Comptes Rendus. Géoscience

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In the late 1980s, the French 'Centre national d'études spatiales' (CNES), in conjunction with the 'Institut géographique national' (IGN) and the 'Groupe de recherche en géodésie spatiale' (GRGS) developed a new geodetic tracking system called DORIS for precise orbit determination of low Earth orbiting satellites for oceanographic missions. Since then, the number of applications has increased, leading recently to the creation of an International DORIS Service (IDS), making it a part of the Global Geodetic Observation System (GGOS) currently under development within the International Association of Geodesy (IAG). The goal of this paper is to present the current applications of the DORIS system for precise orbit determination as well as for geodesy, geophysics, Earth rotation or atmospheric sciences. Current accuracies are discussed as well as already planned improvements. In particular, recent improvements in on-board real time orbit showing 5-cm radial agreement with post-processed orbits are discussed. In addition, when using a 5-satellite constellation, 1-cm precision is achievable for station position as well as sub milli-arcsecond precision for polar motion.

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Determination of tropospheric parameters within the new IVS Pilot Project

Cited by 4 publications

References 4 publications

Absolute phase center corrections of satellite and receiver antennas

Absolute phase center corrections of satellite and receiver antennas

Precipitable Water Vapor Estimates in the Australian Region from Ground-Based GPS Observations

DORIS: From orbit determination for altimeter missions to geodesy

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