1. Institute of Geodesy, Graz University of Technology, Steyrergasse 30, 8010 Graz, Austria
2. Manufacturing and Industrial Technologies Division, Air Force Research Laboratory, 2977 Hobson Way, Wright-Patterson AFB, OH 45433, USA (Corresponding author), e-mail: william.bernstein@us.af.mil, https://orcid.org/0000-0001-8036-3685
3. Virtual Reality Applications Center, Iowa State University, 537 Bissell Rd., Ames, IA 50011, USA