1. Ph.D. Student, Division of Geodesy and Satellite Positioning, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden (corresponding author).
2. Associate Professor, Division of Geodesy and Satellite Positioning, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden.
3. Professor, Division of Geodesy and Satellite Positioning, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden.
4. Researcher, Dept. of Geographic Information and Asset Management, WSP Civils, 121 88 Stockholm, Sweden.