Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System
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 r...
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| Format: | Article |
| Language: | English |
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De Gruyter
2012-12-01
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| Series: | Journal of Geodetic Science |
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| Online Access: | https://doi.org/10.2478/v10156-012-0002-x |
| _version_ | 1811212549724569600 |
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| author | Sánchez L. |
| author_facet | Sánchez L. |
| author_sort | Sánchez L. |
| collection | DOAJ |
| description | 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 field 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 field models for worldwide unified precise height determination). According to this, the GGOS Theme 1 ”Unified 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 unified vertical reference system. |
| first_indexed | 2024-04-12T05:30:55Z |
| format | Article |
| id | doaj.art-09bbef684e4a4d48ac49ee798bf5e43a |
| institution | Directory Open Access Journal |
| issn | 2081-9943 |
| language | English |
| last_indexed | 2024-04-12T05:30:55Z |
| publishDate | 2012-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Journal of Geodetic Science |
| spelling | doaj.art-09bbef684e4a4d48ac49ee798bf5e43a2022-12-22T03:46:04ZengDe GruyterJournal of Geodetic Science2081-99432012-12-012432534210.2478/v10156-012-0002-xTowards a vertical datum standardisation under the umbrella of Global Geodetic Observing SystemSánchez L.0Deutsches Geodätisches Forschungsinstitut (DGFI), Munich, GermanyMost 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 field 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 field models for worldwide unified precise height determination). According to this, the GGOS Theme 1 ”Unified 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 unified vertical reference system.https://doi.org/10.2478/v10156-012-0002-xggos height systemglobal reference levelglobal vertical reference systemvertical datum standardisationw<sub>0</sub> reference value |
| spellingShingle | Sánchez L. Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System Journal of Geodetic Science ggos height system global reference level global vertical reference system vertical datum standardisation w<sub>0</sub> reference value |
| title | Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System |
| title_full | Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System |
| title_fullStr | Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System |
| title_full_unstemmed | Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System |
| title_short | Towards a vertical datum standardisation under the umbrella of Global Geodetic Observing System |
| title_sort | towards a vertical datum standardisation under the umbrella of global geodetic observing system |
| topic | ggos height system global reference level global vertical reference system vertical datum standardisation w<sub>0</sub> reference value |
| url | https://doi.org/10.2478/v10156-012-0002-x |
| work_keys_str_mv | AT sanchezl towardsaverticaldatumstandardisationundertheumbrellaofglobalgeodeticobservingsystem |