On the estimation of physical height changes using GRACE satellite mission data – A case study of Central Europe

Godah, Walyeldeen; Szelachowska, Malgorzata; Krynski, Jan

doi:10.1515/geocart-2017-0013

Cited by 8 publications

(6 citation statements)

References 23 publications

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“…Similar research was performed for Central Europe (Godah et al, 2017c). It was shown that physical height changes as a combination of temporal variations of height anomalies and vertical displacements reach up to 22.8 mm over the selected study area.…”

Section: Maintenance Of the Vertical Control In Polandsupporting

confidence: 72%

Geodesy and Cartography

Krynski¹,

Rogowski²,

Liwosz³

2019

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Research activities of Polish research groups in a period of 2015-2019 on reference frames and reference networks are reviewed and summarised in this paper. The summary contains the results concerning the implementation of latest resolutions on reference systems of the International Union of Geodesy and Geophysics and the International Union of Astronomy with special emphasis on the changes in the Astronomical Almanac of the Institute of Geodesy and Cartography, Warsaw. It further presents the status of the implementation of the European Terrestrial Reference System 1989 (ETRS89) in Poland, monitoring the terrestrial reference frame, operational work of GNSS permanent IGS/EPN stations in Poland, operational work of the laser ranging station in Poland of the International Laser Ranging Service (ILRS), active GNSS station network for the realization of ETRS89 in Poland, validation of recent ETRS89 realization, expressed in ETRF2000 in Poland, and maintenance of the vertical control in Poland (PL-KRON86-NH). Extensive research activities are observed in the field of maintenance and modernization of gravity control not only in Poland, but also in Sweden and in Denmark, as well as establishment of gravity control in Ireland based on absolute gravity survey. The magnetic control in Poland was also regularly maintained. The bibliography of the related works is given in references.

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Section: Maintenance Of the Vertical Control In Polandsupporting

confidence: 72%

Geodesy and Cartography

Krynski¹,

Rogowski²,

Liwosz³

2019

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“…The degree-1 and degree-2 harmonic coefficients of CSR RL06 GRACE-based Global Geopotential Models (GGMs) were replaced by degree-1 from the solution described in [50] and the degree-2 obtained from Satellite Laser Ranging (SLR) [51]. The DDK3 decorrelation filter [52] that compromises between reducing noise and keeping the signal [18], was utilized to reduce the noise included in CSR RL06 GRACE-based GGMs. Moreover, these GGMs were truncated at d/o 60 that corresponds to the spatial resolution of the DDK3 filter.…”

Section: Data and Methods Usedmentioning

confidence: 99%

“…On 22 May 2018, the GRACE Follow-On (GRACE-FO) satellite mission, designed for a nominal lifetime of five years, was launched for further monitoring temporal mass variations within the Earth's system [12]. Several authors demonstrated the usefulness of GRACE satellite mission data for investigating temporal variations of geoid/quasigeoid heights, e.g., [13][14][15][16][17][18][19]. Moreover, many authors have proved that the estimated vertical deformations of the Earth's surface using GRACE satellite mission data are in a good agreement with the corresponding ones determined from other space geodetic techniques such as GNSS on a global scale, e.g., [20][21][22], on a continental scale, e.g., [23,24] in Europe, as well as on a local/regional scale, e.g., [25,26] in the Amazon basin, [27] in the West Africa, [28] in the East Africa, [29] in Japan, [30] in Bangladesh, [31][32][33] in China, [34,35] in Tibet, [36,37] in Poland, [38] in Greenland, and [39][40][41][42] in the North America, and Very Long Baseline Interferometry (VLBI) The GRACE (Gravity Recovery and Climate Experiment [11]) satellite mission, operated in the years 2002-2017, provided unique data for the determination of temporal mass variations within the Earth system including temporal variations of hydrological masses on a global/regional scale.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Temporal Variations of Orthometric/Normal Heights Induced by Hydrological Mass Variations over Large River Basins Using GRACE Mission Data

et al. 2020

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Almost half of the Earth’s land is covered by large river basins. Temporal variations of hydrological masses induce time-varying gravitational potential and temporal mass loading that deforms the Earth’s surface. These phenomena cause temporal variations of geoid/quasigeoid and ellipsoidal heights that result in temporal variations of orthometric/normal heights ΔH/ΔH*. The aim of this research is to assess ΔH/ΔH* induced by hydrological masses over large river basins using the Gravity Recovery and Climate Experiment (GRACE) satellite mission data. The results obtained reveal that for the river basin of a strong hydrological signal, ΔH/ΔH* reach 8 cm. These ΔH/ΔH* would be needed to reliably determine accurate orthometric/normal heights. The ΔH/ΔH* do not exceed ±1 cm in the case of the river basin of the weak hydrological signal. The relation between hydrological mass changes and ΔH/ΔH* was investigated. Correlations between ΔH/ΔH* and temporal variations of equivalent water thickness were observed in 87% of river basins subareas out of which 45% exhibit strong correlations. The ΔH/ΔH* determined over two river basins that characterize with the strongest and weakest temporal variations were analysed using the Principal Component Analysis method. The results obtained reveal that ΔH/ΔH* in subareas of the same river basin can significantly differ (e.g., ±2 cm in the Amazon basin) from each other, and are strongly associated with different spatio-temporal patterns of the entire river basin.

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“…The results of study of physical height changes over Central Europe indicate that in the period of 2004-2010, they reach up to 22.8 mm (Godah et al, 2017c). It was also shown that using the seasonal decomposition (SD) method they can be modelled with the accuracy of 1.4 mm.…”

Section: Temporal Variations Of the Gravity Field From Grace Datamentioning

confidence: 99%

Geodesy and Cartography

Krynski

Dykowski

Olszak

2019

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Activities of the Polish research gSDroups concerning gravity field modelling and gravimetry in a period of 2015-2018 are reviewed and summarised in this paper. The summary contains the results of research on the evaluation of GOCE-based global geopotential models (GGMs) in Poland and geoid modelling. Extensive research activities are observed in the field of absolute gravity surveys, in particular for the maintenance of national gravity control in Poland, Sweden, Denmark, the Republic of Ireland and in Northern Ireland as well as for geodynamics with special emphasis on metrological aspects in absolute gravimetry. Long term gravity variations were monitored in two gravimetric laboratories: the Borowa Gora Geodetic-Geophysical Observatory, and Jozefoslaw Astrogeodetic Observatory with the use of quasi-regular absolute gravity measurements as well as tidal gravimeter records. Gravity series obtained were analysed considering both local and global hydrology effects. Temporal variations of the gravity field were investigated using data from GRACE satellite mission as well as SLR data. Estimated variations of physical heights indicate the need for kinematic realization of reference surface for heights. Also seasonal variability of the atmospheric and water budgets in Poland was a subject of investigation in terms of total water storage using the GLDAS data. The use of repeatable absolute gravity data for calibration/validation of temporal mass variations derived from satellite gravity missions was discussed. Contribution of gravimetric records to seismic studies was investigated. The bibliography of the related works is given in references.

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On the estimation of physical height changes using GRACE satellite mission data – A case study of Central Europe

Cited by 8 publications

References 23 publications

Geodesy and Cartography

Geodesy and Cartography

Assessment of Temporal Variations of Orthometric/Normal Heights Induced by Hydrological Mass Variations over Large River Basins Using GRACE Mission Data

Geodesy and Cartography

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