The effect of the noise, spatial distribution, and interpolation of ground gravity data on uncertainties of estimated geoidal heights
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F18%3A43952647" target="_blank" >RIV/49777513:23520/18:43952647 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/content/pdf/10.1007%2Fs11200-018-1013-6.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs11200-018-1013-6.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11200-018-1013-6" target="_blank" >10.1007/s11200-018-1013-6</a>
Alternative languages
Result language
angličtina
Original language name
The effect of the noise, spatial distribution, and interpolation of ground gravity data on uncertainties of estimated geoidal heights
Original language description
The uncertainties of the geoidal heights estimated from ground gravity data caused by their spatial distribution and noise are investigated in this study. To test these effects, the geoidal heights are estimated from synthetic ground gravity data using the Stokes-Helmert approach. Five different magnitudes of the random noise in ground gravity data and three types of their spatial distribution are considered in the study, namely grid, semi-grid and random. The noise propagation is estimated for the two major computational steps of the Stokes-Helmert approach, i.e., the downward continuation of ground gravity and Stokes’s integration. Numerical results show that in order to achieve the geoid accurate to one centimetre, the ground gravity data should be distributed on the grid or semi-grid with the average angular distance less than 2 arc-min. If they are randomly distributed (scattered gravity points), the one-centimetre geoid cannot be estimated if the average angular distance between scattered gravity points is larger than 1 arc-min. Besides, the noise of the gravity data for the tree types of their spatial distribution should be below 1 mGal to estimate the one-centimetre geoid. The advantage of interpolating scattered gravity points onto the regular grid, rather than using them directly, is also investigated in this study. Numerical test shows that it is always worth interpolating the scattered points to the regular grid except if the scattered gravity points are sparser than 5 arc-min.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10508 - Physical geography
Result continuities
Project
<a href="/en/project/GA18-06943S" target="_blank" >GA18-06943S: Theory of processing higher-order geopotential gradients and their applications in geodesy</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Studia Geophysica et Geodaetica
ISSN
0039-3169
e-ISSN
1573-1626
Volume of the periodical
63
Issue of the periodical within the volume
1
Country of publishing house
DE - GERMANY
Number of pages
21
Pages from-to
34-54
UT code for WoS article
000459512900002
EID of the result in the Scopus database
2-s2.0-85058858355