Geodetski list, Vol. 77 (100) No. 1, 2023.
Pregledni rad
The GNSS-Levelling Local Geoid Determination Using the Conditional Adjustment with Unknown Model
Yasemin Sisman
orcid.org/0000-0002-6600-0623
; Department of Geomatics Engineering, Ondokuz Mayis University, Samsun, Turkey
Piotr Banasik
orcid.org/0000-0002-3604-4019
; AGH University of Science and Technology, Krakow, Poland
Kamil Maciuk
orcid.org/0000-0001-5514-8510
; AGH University of Science and Technology, Krakow, Poland
Sažetak
GNSS-Levelling geoid determination is defined as the mathematical relation between orthometric and ellipsoidal height. The local polynomial surface interpolation method is one of the most widely applied methods for GNSS-Levelling geoid determination. The basic solution of polynomial surface interpolation is based on the geoid undulation, the difference of orthometric and ellipsoidal height, including some undetectable measurement error. In this study, firstly, the1st, 2nd and 3rd degree polynomial surface were taken as the geoid surface to determine the appropriate polynomial degree for selected study area, Samsun province of Turkey, using ordinary least squares adjustment models. Then, the Conditional Adjustment with Unknown Model adjustment solutions are made for these real work data. At the end of application, the results were then compared to these models and some suggestions were made for future applications.
Ključne riječi
geoid undulation; Conditional Adjustment with Unknown Model; optimization; ordinary least square adjustment
Hrčak ID:
306294
URI
Datum izdavanja:
29.3.2023.
Posjeta: 731 *