Geostatistical prediction of a local geometric geoid - kriging and cokriging with the use of EGM2008 geopotential model
PBN-AR
Instytucja
Wydział Geodezji Górniczej i Inżynierii Środowiska (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Studia Geophysica et Geodaetica (20pkt w roku publikacji)
ISSN
0039-3169
EISSN
1573-1626
Wydawca
Geofyzikální ústav AV ČR (Praha)
DOI
Rok publikacji
2018
Numer zeszytu
2
Strony od-do
187--205
Numer tomu
62
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
1.4
Autorzy
(liczba autorów: 2)
Słowa kluczowe
EN
kriging
local geoid
cokriging
EGM2008
Streszczenia
Język
EN
Treść
We investigate prediction abilities of different variants of kriging and different combinations of data in a local geometric (GNSS/leveling based) geoid modeling. In order to generate local geoid models, we have used GNSS/leveling data and EGM2008 geopotential model. EGM2008 has been used twofold. Firstly, it was used as a basic long wave-length trend to be removed from geoid undulation data to generate a residual field of geoid heights modeled later by kriging (remove-restore technique). Secondly, EGM2008-based undulations were used as a secondary variable in a cokriging prediction procedure (as pseudo-observations). Besides the use of EGM2008, the kriging-based local geometric geoid models were generated only on the basis of raw undulations data. Kriging itself was used in two variants, i.e. ordinary kriging and universal kriging for univariate and bivariate cases (cokriging). The quality of kriging-based prediction for all its variants and all data combinations have been investigated on one fixed validation dataset consisting of 86 points and three training data sets characterized by a different density of sampling. Results of this study indicate that incorporation of EGM08 as a long wave-length trend in kriging prediction procedure outperforms cokriging strategy based on incorporation of EGM08 as a secondary spatially correlated variable.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:114080
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