Gravity potential at the Major Vertical Datum as primary geodetic constant

Yurkina, M. I.

doi:10.1007/bf02295901

Cited by 20 publications

(5 citation statements)

References 3 publications

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“…Concerning the strategies for the unification of existing height networks, a general agreement between most of the authors can be assumed (e.g., Rummel and Teunissen, 1988;Rapp and Balasubramania, 1992;Balasubramania, 1994;Rapp, 1994;Rapp et al, 1994;Kearsley, 1998;Burša et al, 2002a). More controversial was the discussion about the zero level of a WHS (e.g., Burša et al, 1998aBurša et al, ,b, 2002bYurkina, 1996;Ihde and Augath, 2001;Hipkin, 2002;Rummel and Heck, 2001).…”

Section: Concept Of the Realization Of A World Height System (Whs)mentioning

confidence: 97%

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A unified global height reference system as a basis for IGGOS

Ihde

Sánchez

2005

Journal of Geodynamics

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Section: Concept Of the Realization Of A World Height System (Whs)mentioning

confidence: 97%

“…Yurkina (1996) states: Since the potential W 0 enters directly into the fundamental equations of the theory of the Earth's figure it is natural to adopt GM, J 2 , ω and W 0 as the primary geodetic parameters. The semi-major axis of the reference ellipsoid has also a physical meaning, however, this is secondary.…”

Section: Height Datummentioning

confidence: 99%

A unified global height reference system as a basis for IGGOS

Ihde

Sánchez

2005

Journal of Geodynamics

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“…Some of these proposals inclusively suggest the replacement of a by W 0 as de nition parameter in the computation of the reference ellipsoid (e.g. Burša et al 2002, Yurkina 1996. Nonetheless, the main conclusion appointed to keep the GRS80 ellipsoid as the official one.…”

Section: Components Of a Global Vertical Reference Systemmentioning

confidence: 98%

Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System

Sánchez¹

2012

Journal of Geodetic Science

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Most of the existing height systems refer to local sea surface levels, are stationary (do not consider variations in time), and realise different physical height types (orthometric, normal, normal-orthometric, etc.). In general, their accuracy is about two orders of magnitude less than that of the realisation of geometric reference systems (sub millimetre level). The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG), taking care of providing a precise geodetic infrastructure for monitoring the system Earth, promotes the standardisation of height systems worldwide. The main objectives are: (1) to provide a reliable frame for consistent analysis and modelling of global phenomena and processes affecting the Earth's gravity eld and the Earth's surface geometry; and (2) to support the precise combination of physical and geometric heights in order to exploit at a maximum the advantages of satellite geodesy (e.g. combination of satellite positioning and gravity eld models for worldwide uni ed precise height determination). According to this, the GGOS Theme 1 "Uni ed Height System" was established in February 2010 with the purpose to bring together existing initiatives and to address the activities to be faced. Starting point are the results delivered by the IAG Inter-Commission Project 1.2 "Vertical Reference Frames" during the period 2003-2011. The present actions related to the vertical datum homogenisation are being coordinated by the working group "Vertical Datum Standardisation", which directly depends on the GGOS Theme 1 and is supported by the IAG Commissions 1 (Reference Frames) and 2 (Gravity Field), as well as by the International Gravity Field Service (IGFS). This paper discusses some aspects to take into consideration for the realisation of a standardised globally uni ed vertical reference system. Keywords: GGOS height system • global reference level • global vertical reference system • vertical datum standardisation • W 0 reference value © Versita sp. z o.o.

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“…Therefore, there is usually no connection between global and di¤erent local vertical datums with each other. Several studies under the concepts for the realization of world height system or the unification of height systems using W 0 have been conducted by various research groups (i.e., Bursa et al 2004, Ihde and Augath 2002, Sanchez 2007, Yurkina 1996.…”

Section: Realization Of Global Vertical Datummentioning

confidence: 99%

Verification of heights above global mean sea level from high-degree global geopotential models by using leveling data

Ustun

2011

Journal of Applied Geodesy

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The dedicated satellite gravity missions CHAllenging Minisatellite Payload (CHAMP), Gravity Recovery and Climate Experiment (GRACE), and Gravity field and steady-state Ocean Circulation Explorer (GOCE) and their recent and expected Global Geopotential Models (GGMs) present new opportunities for the determination of gravity-related heights. Global Positioning System (GPS), the recent GGMs, and reference value W 0 are used to study the construction of di¤erent height systems and verify high-degree global geopotential models. This approach matches well with all theoretical basics of height systems. The presented numerical strategy is independent of height anomaly and geoid undulation computation. Using the International Terrestrial Reference Frame (ITRF) coordinates at 47 GPS stations of the Turkish National Vertical Control Network (TNVCN), the gravity potential values are computed based on new-generation GGMs. The computed gravity potentials are converted into di¤erent height systems. A global mean sea level represented by a geoid potential has been taken as reference for the heights. The GGM-derived geopotential numbers, Helmert orthometric, and Molodensky normal heights at the GPS stations are compared against the results from precise leveling. The numerical application demonstrates that three types of gravity-related heights can be determined with a similar accuracy level (e12 cm). When long-term deformations such as tectonic activity and possible land subsidence/uplift e¤ects on the heights of benchmarks of the TNVCN are taken into account, the obtained results are significant, and also, under the light of the dedicated satellite gravity missions, high-resolution GGMs such as EGM2008 have an important potential for the realization of a unified height system. The experimental study shows a datum bias of 38 e 2 cm between the TNVCN datum and the global datum.

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Gravity potential at the Major Vertical Datum as primary geodetic constant

Cited by 20 publications

References 3 publications

A unified global height reference system as a basis for IGGOS

A unified global height reference system as a basis for IGGOS

Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System

Verification of heights above global mean sea level from high-degree global geopotential models by using leveling data

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