eCite Digital Repository
Absolute performance of AUSGeoid09 in mountainous regions
Citation
Sussanna, V and Janssen, V and Gibbings, P, Absolute performance of AUSGeoid09 in mountainous regions, Journal of Applied Geodesy, 8, (3) pp. 195-203. ISSN 1862-9016 (2014) [Refereed Article]
 | PDF 4Mb |
Copyright Statement
Copyright 2014 Walter de Gruyter GmbH The final publication is available at www.degruyter.com.
DOI: doi:10.1515/jag-2014-0007
Abstract
The Australian Height Datum (AHD) is the
current national vertical datum for Australia, and AUSGeoid09
is the latest quasigeoid model used to compute
(normal-orthometric)AHDheights fromGlobalNavigation
Satellite System (GNSS) derived ellipsoidal heights. While
previous studies have evaluated the AUSGeoid09 model
across Australia, such studies have not focused on mountainous
regions in particular. This paper investigates the
performance of AUSGeoid09 in an absolute sense in the
Mid Hunter and Snowy Mountains regions of New South
Wales. Absolute (i.e. single point) comparisons were undertaken
between AUSGeoid09-derived heights and published
AHD heights. The performance of AUSGeoid09 was
evaluated relative to its predecessor AUSGeoid98. In both
study areas, an overall improvement is evident when applying
AUSGeoid09 to compute AHD heights in an absolute
sense. In the MidHunter, AUSGeoid09 provided a substantial
improvement over its predecessor, clearly demonstrating
the benefits of its new geometric component on
GNSS-derived AHD height determination. In the Snowy
Mountains, moderate improvement over AUSGeoid98 was
evident. However, a slope was detected for AUSGeoid09
residuals, and it appears that the geometric component
may have overcompensated for sea surface topography
in this area. While this appraisal of AUSGeoid09 performance
in mountainous regions is encouraging, it has
been shown that some discrepancies still remain between
AUSGeoid09-derived heights and AHD. Eventually, a new
vertical datum will be necessary to ensure homogeneity
across Australia.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | AUSGeoid09; AHD;geoid model;N values; height datum;GNSS |
| Research Division: | Earth Sciences |
| Research Group: | Geophysics |
| Research Field: | Geodesy |
| Objective Division: | Environmental Management |
| Objective Group: | Other environmental management |
| Objective Field: | Other environmental management not elsewhere classified |
| UTAS Author: | Janssen, V (Dr Volker Janssen) |
| ID Code: | 96372 |
| Year Published: | 2014 |
| Deposited By: | Geography and Environmental Studies |
| Deposited On: | 2014-11-03 |
| Last Modified: | 2022-09-01 |
| Downloads: | 155 View Download Statistics |
Repository Staff Only: item control page