Contribution of GRACE Satellite Mission to the Determination of Orthometric/Normal Heights Corrected for Their Dynamics—A Case Study of Poland

Szelachowska, Malgorzata; Godah, Walyeldeen; Krynski, Jan

doi:10.3390/rs14174271

Cited by 5 publications

(7 citation statements)

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“…1-2 mm, respectively. Overall, the results obtained indicate the need of Δ𝐻/Δ𝐻 * for the determination of accurate orthometric/normal heights that fulfil the contemporary geodetic scientific requirements and high-precision applications associated with physical heights (Szelachowska et al, 2022).…”

Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 77%

“…Significant efforts of the IGiK's team have been put into the estimation of orthometric/normal height changes (Δ𝐻/Δ𝐻 * ) over 24 large river basins (Godah et al, 2020c) as well as for the areas of Turkey (Öztürk et al, 2020) and Poland (Szelachowska et al, 2022) using GRACE satellite mission data. For the river basin of a weak hydrological signal, such as the Orange river basin, Δ𝐻/Δ𝐻 * do not exceed ±1 cm, while Δ𝐻/Δ𝐻 * can reach 8 cm in the case of the river basin of strong hydrological signal, e.g.…”

Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 99%

“…Moreover, the use of Green's function for the determination of Δ𝐻/Δ𝐻 * from ΔEWT obtained from the WGHM was recommended (Öztürk et al, 2020). For the area of Poland, the need for monitoring Δ𝐻/Δ𝐻 * to correct orthometric/normal heights was investigated (Szelachowska et al, 2022). Firstly, the relation between temporal mass variations within the Earth system with respect to geoid/quasigeoid height changes, Δℎ, and Δ𝐻/Δ𝐻 * was described.…”

Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 99%

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Research on gravity field modelling and gravimetry in Poland in 2019–2022

2023

Advances in Geodesy and Geoinformation

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The article presents the reviewed and summarised research activities of the Polish research groups on gravimetry and gravity field modelling in the period of 2019-2022. It contains the results of absolute gravity surveys for the maintenance of the international gravity reference level in Poland and Europe, and for geodynamic research with an emphasis on metrological aspects. It also contains relative gravimetry issues as well as the results of marine gravity surveys in the southern Baltic Sea. Non-tidal gravity changes were extensively investigated. Long-term gravity variations were monitored at the Borowa Gora Geodetic-Geophysical Observatory and in a few other locations in Poland. The contribution of gravimetric records to seismic studies was investigated. Temporal variations of the gravity field from GRACE (Gravity Recovery and Climate Experiment) and GRACE-FO (GRACE Follow-On) data, in particular, deformations of the Earth's surface as well as temporal variations of heights, total water storage and groundwater storage were investigated. Moreover, GRACE-based products and the performance of monthly Global Geopotential Models (GGMs) were a subject of research. GGMs developed in last years were evaluated. The research on developing new approaches in geoid modelling and their validation was conducted. New regional and local geoid models were determined for Poland and Ethiopia. The use of different techniques for estimating the absolute sea level at sites of the selected network in the Baltic Sea was investigated.

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Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 77%

Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 99%

Section: Temporal Variations Of the Gravity Field From Grace/grace-fo...mentioning

confidence: 99%

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Research on gravity field modelling and gravimetry in Poland in 2019–2022

2023

Advances in Geodesy and Geoinformation

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“…that are contaminated by various types of noise (i.e., stochastic processes and correlations). Several papers have contributed to GNSS and its application to crustal deformation and geodynamics [63][64][65][66][67]; civil engineering [68,69]; stochastic noise modelling [70,71]; natural hazards such as landslides [36,37,72]; SLR estimation and coastal flooding [73][74][75]; hydrology, seasonal displacements, and drought monitoring using GNSS and/or GRACE/GRACE-FO [76][77][78]; and the study of ionospheric disturbances [79][80][81], together with research focused on the stability of the reference frame [82].…”

Section: Concluding Remarks On Contributions Of the Special Issue Of ...mentioning

confidence: 99%

Recent Advances in Modelling Geodetic Time Series and Applications for Earth Science and Environmental Monitoring

Montillet

Zhao

et al. 2022

Remote Sensing

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Geodesy is the science of accurately measuring the topography of the earth (geometric shape and size), its orientation in space, and its gravity field. With the advances in our knowledge and technology, this scientific field has extended to the understanding of geodynamical phenomena such as crustal motion, tides, and polar motion. This Special Issue is dedicated to the recent advances in modelling geodetic time series recorded using various instruments. Due to the stochastic noise properties inherent in each of the time series, careful modelling is necessary in order to extract accurate geophysical information with realistic associated uncertainties (statistically sufficient). The analyzed data have been recorded with various space missions or ground-based instruments. It is impossible to be comprehensive in the vast and dynamic field that is Geodesy, particularly so-called “Environmental Geodesy”, which intends to understand the Earth’s geodynamics by monitoring any changes in our environment. This field has gained much attention in the past two decades due to the need by the international community to understand how climate change modifies our environment. Therefore, this Special Issue collects some articles which emphasize the recent development of specific algorithms or methodologies to study particular natural phenomena related to the geodynamics of the earth’s crust and climate change.

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“…Currently, through GNSS technology, the geodetic coordinates (φ, λ, h) of a point of interest on Earth are effectively determined. However, the exact values of the normal heights (HN) of these points should still be determined on the basis of geometric leveling [2,3]. The object of the study is the territory of Lebanon, where there is neither official national geoid model, nor gravimetric data, and accordingly, there is no state altitude network.…”

Section: Introductionmentioning

confidence: 99%

Integration of GNSS Technology and Geometric Levelling for Accurate Height Determination in Uneven Terrains: A Case Study in Lebanon

Mustafin,

Moussa

2024

Preprint

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The technology for determining the point’s coordinates on the earth’s surface using the global navigation satellite system (GNSS) is becoming the norm along with ground-based methods. In this case, determining coordinates does not cause any particular difficulties. However, to identify normal heights using this technology with a given accuracy, special research is required. The fact is that satellite determinations of geodetic heights (h) over an ellipsoid surface differ from ground-based measurements of normal height (HN) over a quasi-geoid surface by a certain value called quasi-geoid height or height anomaly (ζ). In relation to determining heights of a certain territory, the concept of geoid height (N) is usually operated when dealing with a geoid model. In this work, geodetic and normal heights are determined for 5 control points in three different regions in Lebanon, where measurements are carried out using GNSS technology and geometric levelling. The obtained quasi-geoid heights are compared with geoid heights derived from the global Earth model EGM2008. The results obtained showed that, in the absence of gravimetric data, the combination of global Earth model data, geometric levelling for selected areas and satellite determinations allows the creation of a high accurate altitude network for mountainous areas.

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Contribution of GRACE Satellite Mission to the Determination of Orthometric/Normal Heights Corrected for Their Dynamics—A Case Study of Poland

Cited by 5 publications

References 45 publications

Research on gravity field modelling and gravimetry in Poland in 2019–2022

Research on gravity field modelling and gravimetry in Poland in 2019–2022

Recent Advances in Modelling Geodetic Time Series and Applications for Earth Science and Environmental Monitoring

Integration of GNSS Technology and Geometric Levelling for Accurate Height Determination in Uneven Terrains: A Case Study in Lebanon

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