Use of GNSS and a refined GGM (XGM2019e) for determining normal heights in the Imbituba Brazilian Vertical Datum and in the International Height Reference System
نویسندگان
چکیده
This paper aimed to evaluate the use of Global Navigation Satellite System (GNSS) ellipsoidal heights in conjunction with height anomalies provided by Geopotential Model (GGM) XGM2019e, refined Residual Terrain Modelling (RTM) technique, obtain normal Brazil, referred Imbituba Brazilian Vertical Datum (IBVD) and International Height Reference (IHRS). For this purpose, a local modelling approach has been analyzed contrast national modeling one on reference geopotential value. this, methodology based space was adapted. In modeling, two study subregions were defined using spatial clustering analysis IBVD GGM/RTM differences outliers. The parameters have estimated three different configurations. validation step, Root Mean Square Errors (RMSE) discrepancies between transformed official calculated. both more accurate results obtained modeling. SP1 subregion accuracy increased tenfold (0.97m 0.10m) SP2 improved from 0.39m 0.17m. linkage future realization IHRS, not possible. However, calculated analyzed.
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ژورنال
عنوان ژورنال: Boletim De Ciencias Geodesicas
سال: 2022
ISSN: ['1982-2170', '1413-4853']
DOI: https://doi.org/10.1590/s1982-21702022000200009