Precise Hydrodynamic Leveling by Using Pressure Gauges

Liibusk, Aive; Ellmann, Artu; Kõuts, Tarmo; Jürgenson, Harli

doi:10.1080/01490419.2013.771594

Cited by 15 publications

(17 citation statements)

References 8 publications

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“…geoid). However, Liibusk et al [4] demonstrate that in the selected study area the influence due to mean SST can be neglected. Then the corresponding height difference (ΔH) between CP pairs is computed as (cf.…”

Section: Principles Of Hydrodynamic Levellingmentioning

confidence: 98%

“…All the PGs have been operational two years (2010)(2011). This study applies the same hydrodynamic levelling methodology developed in [4] for 2 years long data series (rather than annual data used in [4]). An advantage of PG is that data sampling interval can be easily changed, note that typically 5 or 10 minutes is used for maritime purposes.…”

Section: Introductionmentioning

confidence: 99%

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Transfer of heights to islands in West-Estonian Archipelago using hydrodynamic levelling

Liibusk

Kõuts

Ellmann

2012

2012 IEEE/OES Baltic International Symposium (BALTIC)

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During the last decade sea level measurements by means of pressure sensors have become wide-spread, since they are compact, can withstand icy conditions, are easy to integrate with data loggers and communication systems. This study uses two years (2010-2011) long sea level series collected by pressure gauges for hydrodynamic levelling. As a result, the accuracy of hydrodynamic levelling was estimated to be ±1.5 cm in West-Estonian Archipelago. Therefore the height differences calculated from sea level series of contemporary pressure gauges were used as reference for historic staff gauge readings with data sampling 12 h and for some days sea level observations in calm weather and ice covered sea conditions. The comparisons indicated that the height transfer accuracy ±1.5 cm with different observation periods and data samplings is guaranteed only up to 20 km distances. Over longer distances the frequent data sampling and at least one year sea level observations must be carried out for geodetic applications.

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Section: Principles Of Hydrodynamic Levellingmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Transfer of heights to islands in West-Estonian Archipelago using hydrodynamic levelling

Liibusk

Kõuts

Ellmann

2012

2012 IEEE/OES Baltic International Symposium (BALTIC)

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“…Their use may yield unreasonable errors in coastal areas (see Liibusk et al (2013)). Unfortunately, no specially designated high resolution MDT model for the Väinameri exists, to our present knowledge.…”

Section: Study Area and Considerations On The Mean Dynamic Topographymentioning

confidence: 98%

“…Therefore, disregarding the MDT values in further comparisons could be safer, since their involvement may yield errors exceeding the range of the geoid model errors. For a more extended discussion see Liibusk et al (2013). Thus, similarly to Liibusk et al (2013), the MDT values are taken as a constant (MDT = 0 in Eq.…”

Section: Study Area and Considerations On The Mean Dynamic Topographymentioning

confidence: 99%

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Validation of Marine Geoid Models by Profile-wise GNSS Measurements on Ice Surface

Liibusk

Ellmann

2015

Marine Geodesy

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Ship-board GNSS (Global Navigation Satellite System) measurements are widely used for determination of sea surface heights, marine geoid validation and/or satellite altimetry calibration. However, the use of a vessel could be complicated near coastal areas due to shallow water. Therefore, in areas of sea ice formation GNSS measurements on ice surface could be a viable alternative to vessel-borne surveys. Importantly, the ice-covered water is not affected by short term winds, which otherwise could have systematic influence on the instantaneous sea surface topography. Downloaded by [University of Otago] at 04:27 08 July 2015 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2This study tackles methodology and validation of marine geoid models by profile-wise GNSS measurements on ice in an archipelago of the Baltic Sea. The GNSS measurements were carried out on the three ice roads with total length 48 kilometres. The along-route standard deviation between the gravimetric geoid model and profile-wise GNSS heights remained within ±2.1 centimetres.

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