1. Finnish Geodetic Institute, Department of Remote Sensing and Photogrammetry, Geodeetinrinne 2, Masala FI-02431, FinlandbFinnish Geodetic Institute, Centre of Excellence in Laser Scanning Research, Geodeetinrinne 2, Masala FI-02431, Finland
2. Finnish Geodetic Institute, Department of Remote Sensing and Photogrammetry, Geodeetinrinne 2, Masala FI-02431, Finland
3. Finnish Geodetic Institute, Department of Remote Sensing and Photogrammetry, Geodeetinrinne 2, Masala FI-02431, FinlandcFinnish Meteorological Institute, Department of Meteorological Research, Erik Palménin aukio 1, Helsinki FI-00560, Finland