1. Research Associate, GNSS Research Centre, Curtin Univ., GPO Box U1987, Perth, WA 6845, Australia (corresponding author). ORCID: .
2. Research Fellow, GNSS Research Centre, Curtin Univ., GPO Box U1987, Perth, WA 6845, Australia.
3. Professor, GNSS Research Centre, Curtin Univ., GPO Box U1987, Perth, WA 6845, Australia; Professor, Dept. of Geoscience and Remote Sensing, Delft Univ. of Technology, PO Box 5048, 2600 GA, Delft, Netherlands.