A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models
Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. Th...
Ausführliche Beschreibung
Autor*in: |
Fund, F. [verfasserIn] Morel, L. [verfasserIn] Mocquet, A. [verfasserIn] |
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Erschienen: |
Walter de Gruyter GmbH & Co. KG ; 2011 |
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© de Gruyter 2011 |
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Umfang: |
10 |
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Walter de Gruyter Online Zeitschriften |
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Übergeordnetes Werk: |
Enthalten in: Journal of applied geodesy - Berlin [u.a.] : de Gruyter, 2007, 5(2011), 2 vom: 06. Juni, Seite 71-80 |
Übergeordnetes Werk: |
volume:5 ; year:2011 ; number:2 ; day:06 ; month:06 ; pages:71-80 ; extent:10 |
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DOI / URN: |
10.1515/jag.2011.006 |
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10.1515/jag.2011.006 doi artikel_Grundlieferung.pp (DE-627)NLEJ247064092 DE-627 ger DE-627 rakwb Fund, F. verfasserin aut A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models Walter de Gruyter GmbH & Co. KG 2011 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © de Gruyter 2011 Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Walter de Gruyter Online Zeitschriften Troposphere Zenith Hydrostatic Delays IERS conventions Morel, L. verfasserin aut Mocquet, A. verfasserin aut Enthalten in Journal of applied geodesy Berlin [u.a.] : de Gruyter, 2007 5(2011), 2 vom: 06. Juni, Seite 71-80 (DE-627)NLEJ248235923 (DE-600)2248811-X 1862-9024 nnns volume:5 year:2011 number:2 day:06 month:06 pages:71-80 extent:10 https://doi.org/10.1515/jag.2011.006 Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-DGR GBV_NL_ARTICLE AR 5 2011 2 06 06 71-80 10 |
spelling |
10.1515/jag.2011.006 doi artikel_Grundlieferung.pp (DE-627)NLEJ247064092 DE-627 ger DE-627 rakwb Fund, F. verfasserin aut A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models Walter de Gruyter GmbH & Co. KG 2011 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © de Gruyter 2011 Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Walter de Gruyter Online Zeitschriften Troposphere Zenith Hydrostatic Delays IERS conventions Morel, L. verfasserin aut Mocquet, A. verfasserin aut Enthalten in Journal of applied geodesy Berlin [u.a.] : de Gruyter, 2007 5(2011), 2 vom: 06. Juni, Seite 71-80 (DE-627)NLEJ248235923 (DE-600)2248811-X 1862-9024 nnns volume:5 year:2011 number:2 day:06 month:06 pages:71-80 extent:10 https://doi.org/10.1515/jag.2011.006 Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-DGR GBV_NL_ARTICLE AR 5 2011 2 06 06 71-80 10 |
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10.1515/jag.2011.006 doi artikel_Grundlieferung.pp (DE-627)NLEJ247064092 DE-627 ger DE-627 rakwb Fund, F. verfasserin aut A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models Walter de Gruyter GmbH & Co. KG 2011 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © de Gruyter 2011 Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Walter de Gruyter Online Zeitschriften Troposphere Zenith Hydrostatic Delays IERS conventions Morel, L. verfasserin aut Mocquet, A. verfasserin aut Enthalten in Journal of applied geodesy Berlin [u.a.] : de Gruyter, 2007 5(2011), 2 vom: 06. Juni, Seite 71-80 (DE-627)NLEJ248235923 (DE-600)2248811-X 1862-9024 nnns volume:5 year:2011 number:2 day:06 month:06 pages:71-80 extent:10 https://doi.org/10.1515/jag.2011.006 Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-DGR GBV_NL_ARTICLE AR 5 2011 2 06 06 71-80 10 |
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10.1515/jag.2011.006 doi artikel_Grundlieferung.pp (DE-627)NLEJ247064092 DE-627 ger DE-627 rakwb Fund, F. verfasserin aut A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models Walter de Gruyter GmbH & Co. KG 2011 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © de Gruyter 2011 Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Walter de Gruyter Online Zeitschriften Troposphere Zenith Hydrostatic Delays IERS conventions Morel, L. verfasserin aut Mocquet, A. verfasserin aut Enthalten in Journal of applied geodesy Berlin [u.a.] : de Gruyter, 2007 5(2011), 2 vom: 06. Juni, Seite 71-80 (DE-627)NLEJ248235923 (DE-600)2248811-X 1862-9024 nnns volume:5 year:2011 number:2 day:06 month:06 pages:71-80 extent:10 https://doi.org/10.1515/jag.2011.006 Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-DGR GBV_NL_ARTICLE AR 5 2011 2 06 06 71-80 10 |
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10.1515/jag.2011.006 doi artikel_Grundlieferung.pp (DE-627)NLEJ247064092 DE-627 ger DE-627 rakwb Fund, F. verfasserin aut A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models Walter de Gruyter GmbH & Co. KG 2011 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © de Gruyter 2011 Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Walter de Gruyter Online Zeitschriften Troposphere Zenith Hydrostatic Delays IERS conventions Morel, L. verfasserin aut Mocquet, A. verfasserin aut Enthalten in Journal of applied geodesy Berlin [u.a.] : de Gruyter, 2007 5(2011), 2 vom: 06. Juni, Seite 71-80 (DE-627)NLEJ248235923 (DE-600)2248811-X 1862-9024 nnns volume:5 year:2011 number:2 day:06 month:06 pages:71-80 extent:10 https://doi.org/10.1515/jag.2011.006 Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-DGR GBV_NL_ARTICLE AR 5 2011 2 06 06 71-80 10 |
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abstract |
Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. © de Gruyter 2011 |
abstractGer |
Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. © de Gruyter 2011 |
abstract_unstemmed |
Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of ~2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. © de Gruyter 2011 |
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title_short |
A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models |
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https://doi.org/10.1515/jag.2011.006 |
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Morel, L. Mocquet, A. |
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Morel, L. Mocquet, A. |
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10.1515/jag.2011.006 |
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