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http://dx.doi.org/10.7848/ksgpc.2020.38.2.153

Precision Evaluation of Recent Global Geopotential Models based on GNSS/Leveling Data on Unified Control Points  

Lee, Jisun (Dept. of Geoinformatics, University of Seoul)
Kwon, Jay Hyoun (Dept. of Geoinformatics, University of Seoul)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.38, no.2, 2020 , pp. 153-163 More about this Journal
Abstract
After launching the GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) which obtains high-frequency gravity signal using a gravity gradiometer, many research institutes are concentrating on the development of GGM (Global Geopotential Model) based on GOCE data and evaluating its precision. The precision of some GGMs was also evaluated in Korea. However, some studies dealt with GGMs constructed based on initial GOCE data or others applied a part of GNSS (Global Navigation Satellite System) / Leveling data on UCPs (Unified Control Points) for the precision evaluation. Now, GGMs which have a higher degree than EGM2008 (Earth Gravitational Model 2008) are available and UCPs were fully established at the end of 2019. Thus, EIGEN-6C4 (European Improved Gravity Field of the Earth by New techniques - 6C4), GECO (GOCE and EGM2008 Combined model), XGM2016 (Experimental Gravity Field Model 2016), SGG-UGM-1, XGM2019e_2159 were collected with EGM2008, and their precisions were assessed based on the GNSS/Leveling data on UCPs. Among GGMs, it was found that XGM2019e_2159 showed the minimum difference compared to a total of 5,313 points of GNSS/Leveling data. It is about a 1.5cm and 0.6cm level of improvement compare to EGM2008 and EIGEN-6C4. Especially, the local biases in the northern part of Gyeonggi-do, Jeju island shown in the EGM2008 was removed, so that both mean and standard deviation of the difference of XGM2019e_2159 to the GNSS/Leveling are homogeneous regardless of region (mountainous or plain area). NGA (National Geospatial-Intelligence Agency) is currently in progress in developing EGM2020 and XGM2019e_2159 is the experimentally published model of EGM2020. Therefore, it is expected that the improved GGM will be available shortly so that it is necessary to verify the precision of new GGMs consistently.
Keywords
Global Geopotential Model; Earth Gravitational Model 2008; Experimental Gravity Field Model 2019e_2159; GNSS/Leveling data; Precision Evaluation;
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1 Abd-Elmotaal, H.A. (2015), Validation of GOCE models in Africa, Newton's Bull, Vol. 5, pp. 149-162.
2 Bae, T.S., Lee, J., Kwon, J.H., and Hong, C.K. (2012), Update of the precision geoid determination in Korea, Geophysical prospecting, Vol. 60, No. 3, pp. 555-571.   DOI
3 Baek, K.M., Kwon, J.H., and Lee, J. (2013), Precision verification of new global gravitational model using GPS/leveling data, Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Vol. 31, No. 3, pp. 239-247. (in Korean with English abstract)   DOI
4 Barthelmes, F. (2014), Global Models, Encyclopedia of Geodesy, Springer International Publishing, Cham, Switzerland.
5 Barthelmes, F. and Köhler, W. (2013), ICGEM-status of the IAG service for global Earth gravity field models after the first decade, The IAG Scientific Assembly 2013, 150th Anniversary of the IAG (Potsdam 2013), 1-6 September, Potsdam, Germany.
6 Bouman, J. and Fuchs, M.J. (2012), GOCE gravity gradients versus global gravity field models, Geophysical Journal International, Vol. 189, No. 2, pp. 846-850.   DOI
7 ESA (2020), ESA EO Missions (GOCE), https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/goce (last date accessed: 05 April 2020).
8 Forste, C., Flechtner, F., Schmidt, R., Meyer, U., Stubenvoll, R., Barthelmes, F., Konig, R., Neumayer, K.H., Rothacher, M., Reigber, C., Biancale, R., Bruinsma, S.L., Lemoine, J.M., and Raimondo, J.C. (2005), A new high resolution global gravity field model derived from combination of GRACE and CHAMP mission and altimetry/gravimetry surface gravity data, EGU General Assembly 2005, 24-29 April, Vienna, Austria.
9 Forste, C., Bruinsma, S., Abrikosov, O., Flechtner, F., Marty, J.C., Lemoine, J.M., Dahle, C., Neumayer, H., Barthelmes, F., Konig, R., and Biancale, R. (2014), EIGEN-6C4-The latest combined global gravity field model including GOCE data up to degree and order 1949 of GFZ Potsdam and GRGS Toulouse, EGU General Assembly 2014, 27 April - 2 May, Vienna, Austria.
10 Gilardoni, M., Reguzzoni, M., and Sampietro, D. (2016), GECO: a global gravity model by locally combining GOCE data and EGM2008, Studia Geophysica et Geodaetica, Vol. 60, No. 2, pp. 228-247.   DOI
11 Godah, W. and Krynski, J. (2013), Evaluation of recent GOCE geopotential models over the area of Poland, Acta Geodyn Geomater, Vol. 10, No. 3, pp. 379-386.   DOI
12 Grombein, T., Seitz, K., and Heck, B. (2017), On highfrequency topography-implied gravity signals for a height system unification using GOCE-based global geopotential models, Surveys in geophysics, Vol. 38, No. 2, pp. 443-477.   DOI
13 Gruber, T., Zingerle, P.H. Pail, R., and Oikonomidou X. (2019), High resolution gravity field models as global reference surface for heights, SIRGAS 2019, 11-14 November, Rio de Janeiro, Brazil.
14 Heiskanen, W. A. and Moritz, H. (1967), Physical Geodesy, W.H. Freeman and Co, San Francisco, CA, USA.
15 ICGEM (2020b), RMS about Mean of GPS/Leveling Minus Gravity Field Model Derived Geoid Heights, http://icgem.gfz-potsdam.de/tom_gpslev (last date accessed: 06 April 2020).
16 Jekeli, C. (1999), An analysis of vertical deflections derived from high-degree spherical harmonic models, Journal of Geodesy, Vol. 73, No. 1, pp. 10-22   DOI
17 Kim, K.B., Yun, H.S., and Choi, H.J. (2020), Accuracy evaluation of geoid heights in the national control points of south Korea using high-degree geopotential model, Applied Sciences, Vol. 10, No. 4, pp. 1466-1476.   DOI
18 Lee, J., Kwon, J.H., Baek, K.M., and Moon, J. (2012), Development of Korean geoid model and verification of its precision, Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Vol. 30, No.5, pp. 493-500. (in Korean with English abstract)   DOI
19 Lee, S.B. and Kim, C.Y. (2012), Development of regional gravimetric geoid model and comparison with EGM2008 gravity-field model over Korea, Scientific Research and Essays, Vo. 7, No. 3, pp. 387-397.
20 Lemoine, F.G., Kenyon, S.C., Factor, J.K., Trimmer, R.G., Pavlis, N.K., Chinn, D.S., Cox, C.M., Klosko, S.M., Luthcke, S.B., Torrence, M.H., Wang, Y.M., Williamson, R.G., Pavlis, E.C., Rapp, R.H., and Olson, T.R. (1998), The Development of the Joint NASA GSFC and the National IMagery and Mapping Agency (NIMA) Geopotential Model EGM96, NASA/TP-1998-206861, GSFC Goddard Space Flight Center, Greenbelt, Maryland, USA.
21 Liang, W., Xu, X., Li, J., and Zhu, G. (2018), The determination of an ultra-high gravity field model SGG-UGM-1 by combining EGM2008 gravity anomaly and GOCE observation data, Acta Geodaetica et Cartographica Sinica, Vol. 47, No. 4, pp. 425-434.
22 Lundquist, C.A. and Veis, G. (1966), Geodetic Parameters for a 1966 Smithsonian Institution standard Earth, SAO special report, Smithsonian Institution, Astrophysical Observatory, pp. 6-104.
23 NGII (2018), 2017 Development of Geoid and Vertical Datum Transformation Model (Part 1), Final Research Report, Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Suwon, Korea, pp. 12-18.
24 NGII (2019), Establishment of Mid to Long-term Strategy for National Reference Frame in Korea (Part 1), Final Research Report, Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Suwon, Korea, pp. 109-113.
25 Pail, R., Fecher, T., Barnes, D., Factor, J.F., Holmes, S.A., Gruber, T., and Zingerle, P. (2018), Short note: the experimental geopotential model XGM2016, Journal of Geodesy, Vol. 92, pp. 443-451.   DOI
26 Pavlis, N.K., Holmes, S.A., Kenyon, S.C., and Factor, J.K. (2008), An earth gravitational model to degree 2160 : EGM2008, EGU General Assembly 2008, 13-18 April, Vienna, Austria.
27 Pavlis, N. K., Holmes, S. A., Kenyon, S. C., and Factor, J. K. (2012), The development and evaluation of the Earth Gravitational Model 2008 (EGM2008), Journal of geophysical research: solid earth, Vol. 117, B04406, pp. 1-38.
28 Tocho, C., Vergos, G.S., and Pacino, M.C. (2014), Evaluation of GOCE/GRACE Derived Global Geopotential Models over Argentina with Collocated GPS/Levelling Observations, In: Marti (ed.), Gravity, Geoid and Height Systems (Proceedings of the IAG Symposium GGHS2012), Springer, Cham, pp. 75-83.
29 Vergos, G.S., Grigoriadis, V.N., Tziavos, I.N., and Kotsakis, C. (2014), Evaluation of GOCE/GRACE Global Geopotential Models over Greece with collocated GPS/Levelling observations and local gravity data, In: Marti (ed.), Gravity, Geoid and Height Systems (Proceedings of the IAG Symposium GGHS2012), Springer, Cham, pp. 85-92.
30 ICGEM (2020a), Global Gravity Field Models, ICGEM(International Centre for Global Earth Models), http://icgem.gfz-potsdam.de/tom_longtime (last date accessed: 06 April 2020).