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
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidade Federal do Paraná
2022
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| _version_ | 1876474080826228736 |
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| author | Rodrigo Evangelista Delgado |
| author_facet | Rodrigo Evangelista Delgado |
| contents | 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 Rodrigo Evangelista Delgado Tiago Lima Rodrigues Ciencias de la Tierra GNSS IHRS Normal heights Vertical datum linkage Global Geopotential Model This paper aimed to evaluate the use of Global Navigation Satellite System (GNSS) ellipsoidal heights in conjunction with height anomalies provided by Global Geopotential Model (GGM) XGM2019e, refined by Residual Terrain Modelling (RTM) technique, to obtain normal heights in Brazil, referred to the Imbituba Brazilian Vertical Datum (IBVD) and the International Height Reference System (IHRS). For this purpose, a local modelling approach has been analyzed in contrast to the national modeling one on the reference geopotential value. For this, a methodology based on geopotential space was adapted. In the local modeling, two study subregions were defined using the spatial clustering analysis of IBVD and GGM/RTM height anomalies differences outliers. The parameters have been estimated using three different configurations. In the parameters validation step, Root Mean Square Errors (RMSE) of the discrepancies between transformed and Brazilian official normal heights were calculated. In both subregions more accurate results have been obtained with the local modeling. In the SP1 subregion the accuracy increased tenfold (0.97m to 0.10m) and SP2 improved from 0.39m to 0.17m. For the linkage to the future realization of IHRS, the accuracy analysis was not possible. However, discrepancies between calculated normal heights and Brazilian official normal heights have been analyzed. 2022 artículo científico 1413-4853 https://www.redalyc.org/articulo.oa?id=393972085002 https://www.redalyc.org/journal/3939/393972085002/ https://www.redalyc.org/journal/3939/393972085002/html/ https://www.redalyc.org/journal/3939/393972085002/393972085002.epub https://www.redalyc.org/journal/3939/393972085002/movil 10.1590/s1982-21702022000200009 en http://www.redalyc.org/revista.oa?id=3939 Boletim de Ciências Geodésicas application/pdf Universidade Federal do Paraná Boletim de Ciências Geodésicas (Brasil) Num.2 Vol.28 |
| format | Artículo científico |
| id | redalyc_393972085002 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Universidade Federal do Paraná |
| spellingShingle | 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 Rodrigo Evangelista Delgado Ciencias de la Tierra GNSS IHRS Normal heights Vertical datum linkage Global Geopotential Model 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 Rodrigo Evangelista Delgado Tiago Lima Rodrigues Ciencias de la Tierra GNSS IHRS Normal heights Vertical datum linkage Global Geopotential Model This paper aimed to evaluate the use of Global Navigation Satellite System (GNSS) ellipsoidal heights in conjunction with height anomalies provided by Global Geopotential Model (GGM) XGM2019e, refined by Residual Terrain Modelling (RTM) technique, to obtain normal heights in Brazil, referred to the Imbituba Brazilian Vertical Datum (IBVD) and the International Height Reference System (IHRS). For this purpose, a local modelling approach has been analyzed in contrast to the national modeling one on the reference geopotential value. For this, a methodology based on geopotential space was adapted. In the local modeling, two study subregions were defined using the spatial clustering analysis of IBVD and GGM/RTM height anomalies differences outliers. The parameters have been estimated using three different configurations. In the parameters validation step, Root Mean Square Errors (RMSE) of the discrepancies between transformed and Brazilian official normal heights were calculated. In both subregions more accurate results have been obtained with the local modeling. In the SP1 subregion the accuracy increased tenfold (0.97m to 0.10m) and SP2 improved from 0.39m to 0.17m. For the linkage to the future realization of IHRS, the accuracy analysis was not possible. However, discrepancies between calculated normal heights and Brazilian official normal heights have been analyzed. 2022 artículo científico 1413-4853 https://www.redalyc.org/articulo.oa?id=393972085002 https://www.redalyc.org/journal/3939/393972085002/ https://www.redalyc.org/journal/3939/393972085002/html/ https://www.redalyc.org/journal/3939/393972085002/393972085002.epub https://www.redalyc.org/journal/3939/393972085002/movil 10.1590/s1982-21702022000200009 en http://www.redalyc.org/revista.oa?id=3939 Boletim de Ciências Geodésicas application/pdf Universidade Federal do Paraná Boletim de Ciências Geodésicas (Brasil) Num.2 Vol.28 |
| title | 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 |
| topic | Ciencias de la Tierra GNSS IHRS Normal heights Vertical datum linkage Global Geopotential Model |
| url | https://www.redalyc.org/articulo.oa?id=393972085002 https://www.redalyc.org/journal/3939/393972085002/ https://www.redalyc.org/journal/3939/393972085002/html/ https://www.redalyc.org/journal/3939/393972085002/393972085002.epub https://www.redalyc.org/journal/3939/393972085002/movil |