The determination of the geoid in South Korea is a national imperative for the modernization of height datums, specifically the orthometric height and the dynamic height, that are used to monitor hydrological systems and environments with accuracy and easy revision, if necessary. The geometric heights above a reference ellipsoid, routinely obtained by GPS, lead immediately to vertical control with respect to the geoid for hydrological purposes if the geoid height above the ellipsoid is known accurately. The geoid height is determined from gravimetric data, traditionally ground data, but in recent times also from airborne data. This paper illustrates the basic concepts for combining these two types of data and gives a preliminary performance assessment of either set or their combination for the determination of the geoid in South Korea. It is shown that the most critical aspect of the combination is the gravitational effect of the topographic masses above the geoid, which, if not properly taken into account, introduces a significant bias of about 8 mgal in the gravity anomalies, and which can lead to geoid height bias errors of up to 10 cm. It is further confirmed and concluded that achieving better than 5 cm precision in geoid heights from gravimetry remains a challenge that can be surmounted only with the proper combination of terrestrial and airborne data, thus realizing higher data resolution over most of South Korea than currently available solely from the airborne data.
@article{ GCRHBD_2013_v31n6_2_567}
,title={Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data}
,volume={6_2}
, url={http://dx.doi.org/10.7848/ksgpc}, DOI={10.7848/ksgpc}
, number= {6_2}
, journal={Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography}
, publisher={Korean Society of Surveying, Geodesy, Photogrammetry and Cartography}
, author={Christopher, Jekeli
and
Hyo Jin, Yang
and
Jay Hyoun, Kwon}
, year={2013}
, month={Dec}
TY - JOUR
T2 - Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
AU - Christopher, Jekeli
AU - Hyo Jin, Yang
AU - Jay Hyoun, Kwon
SN - 1598-4850
TI - Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data
VL - 31
PB - Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
DO - 10.7848/ksgpc
PY - 2013
UR - http://dx.doi.org/10.7848/ksgpc
ER -
Christopher, J.
,
Hyo Jin, Y.
,
&
Jay Hyoun, K.
( 2013).
Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data.
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography,
31
(6_2)
Korean Society of Surveying, Geodesy, Photogrammetry and Cartography.
doi:10.7848/ksgpc
Christopher, J
,
Hyo Jin, Y
,
&
Jay Hyoun, K
2013,
Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data,
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography,
vol. 6_2,
no. 6_2,
Retrieved from http://dx.doi.org/10.7848/ksgpc
[1]
J Christopher
,
Y Hyo Jin
,
and
K Jay Hyoun
,
“Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data”,
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography,
vol. 6_2,
no. 6_2,
Dec
2013.
Christopher, Jekeli
and
,
Hyo Jin, Yang
and
,
Jay Hyoun, Kwon
and
,
“Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data”
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography,
6_2.
6_2
2013:
Christopher, J
,
Hyo Jin, Y
,
Jay Hyoun, K
Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data.
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
[Internet].
2013.
Dec ;
6_2
(6_2)
Available from http://dx.doi.org/10.7848/ksgpc
Christopher, Jekeli
,
Hyo Jin, Yang
,
and
Jay Hyoun, Kwon
,
“Geoid Determination in South Korea from a Combination of Terrestrial and Airborne Gravity Anomaly Data.”
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
6_2
no.6_2
()
Dec,
2013):
http://dx.doi.org/10.7848/ksgpc