Dual-Antenna Terrestrial Laser Scanner Georeferencing Using Auxiliary Photogrammetric Observations

摘要: Terrestrial laser scanning typically requires the use of artificial targets for registration and georeferencing data. This equipment can be burdensome to transport set up, representing expense in both time labor. Environmental factors such as terrain sometimes make target placement dangerous or impossible, lead weak network geometry therefore degraded product accuracy. The additional sensors help reduce required number and, some cases, eliminate need them altogether. research presented here extends methods direct terrestrial scanner data using a dual GNSS antenna apparatus with photogrammetric observations from scanner-mounted camera. Novel combinations processing were tested on collected at two disparate sites order find best method terms efficiency quality. In addition, general model auxiliary is given which used least-squares adjustment uncertainty estimation similar systems varied diverse configurations. We found that dual-antenna system resulted cm-level accuracy practical many applications superior conventional one-antenna systems, observation significantly increased solution.