Lietuvos teritorijos gravimetrinio žemelapio tikslumo vertinimas

Birvydienė, Rosita; Krikštaponis, Boleslovas; Obuchovski, Romuald; Paršeliūnas, Eimuntas; Petroškevičius, Petras

doi:10.3846/gc.2010.03

Cited by 5 publications

(1 citation statement)

References 1 publication

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“…Also the gravity acceleration values were determined using the model of gravimetric map corrections. This model was designed according to data of Lithuanian gravimetric network [8,9]. The gravity acceleration values were assessed by formula:…”

Section: G/cm δ =mentioning

confidence: 99%

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Petroškevičius

Birvydienė

Obuchovski

2014

The 9th International Conference "Environmental Engineering 2014"

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Geodetic measurements are performed in heterogeneous gravity field. Its equipotential surfaces have a complex shape. This needs to be estimated when processing detail geodetic measurements data. Orthometric heights are calculated from one of the equipotential surfacegeoid. Applying the normal height system and evaluating normal height differences needs to assess the non-parallelity of the equipotential surfaces of the gravity field. For that aim normal corrections, defining the non-parallelity of equipotential surfaces of normal gravity field and the deviation of the equipotential surfaces of real gravity field from the normal field are calculated. This work presents determination feasibility of the gravity field equipotential surfaces non-parallelity in Lithuanian territory. The six geodetic vertical network lines were selected for a research; the length of all lines is about 300 km. The gravimetric measurements by Scintrex CG-5 were performed at 203 points of the net. A mean square error of gravity acceleration values did not exceed 14 µGal. The normal corrections were calculated for measured height differences between points. A research shows that after reduction of a number of measured points twice, a mean square error of gravity acceleration values, calculated from interpolated Bouguer gravity anomalies, at the "not measured" points seeks 0.474 mGal, however the normal correction values have changed only in 0.01 mm. The use of gravity acceleration values, obtained from gravimetric map with the mean square error of 0.684 mGal, changes normal corrections up to 0.04 mm.

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Section: G/cm δ =mentioning

confidence: 99%

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Petroškevičius

Birvydienė

Obuchovski

2014

The 9th International Conference "Environmental Engineering 2014"

Self Cite

View full text Add to dashboard Cite

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Research of measurement accuracy using GNSS RTK method for determining geodetic coordinates of vertical network points

Rekus,

Kriaučiūnaitė-Neklejonovienė,

Balevičius

2024

Arab J Geosci

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New Research on Gravity Field in Lithuanian Territory

Petroškevičius

Obuchovski

Birvydienė

et al. 2017

Proccedings of 10th International Conference "Environmental Engineering"

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New research of Lithuanian territory gravity field was started in 2016 with aim to improve accuracy of quasigeoid as well as accuracy of normal heights determined by methods of satellite geodesy. Obtained data could be used in the research of geophysics, geodynamics as well as in performing the precise navigation. Quartz automatic gravimeters Scintrex CG-5 are planned to be used for the survey consisting of 30000 points. Method of gravity measurements was worked out. RMS error of gravity determined with this method does not exceed 60 @Gal. Coordinates and heights of measured points are determined with GNSS using LitPOS network and LIT15G quasigeoid model. RMS error of coordinate determination does not exceed 0,20 m, for normal heights – 0,15 m. Method of gravity anomalies determination and their accuracy estimation was prepared.

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Lietuvos teritorijos gravimetrinio žemelapio tikslumo vertinimas

Cited by 5 publications

References 1 publication

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Research of measurement accuracy using GNSS RTK method for determining geodetic coordinates of vertical network points

New Research on Gravity Field in Lithuanian Territory

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