caa a22 4500 475737601 CHVBK 20180406123451.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s001900000104 doi (NATIONALLICENCE)springer-10.1007/s001900000104 GPS network design: logistics solution using optimal and near-optimal methods [Elektronische Daten] [P. Dare, H. Saleh] Abstract.:  Although permanently installed global positioning system (GPS) networks are necessary when investigating many geophysical descriptors, there is still a need for epoch surveys consisting of temporarily placing GPS receivers sequentially at pre-chosen points. It is shown how the cost of carrying out an epoch survey can be reduced by using techniques within the field of operational research. An epoch survey design consists partly of a list of sessions to be observed, with the length of observing time for each session also specified. The issue of how long to spend observing a session is not addressed, but cheap session schedules are identified given the required sessions and the cost of moving receivers between points. For small networks, optimal solutions are possible; however, for larger networks, non-optimal solutions based upon heuristics have to be accepted. This is necessary because for large networks the optimal solution could take days or weeks to determine, whereas heuristic methods can provide results within seconds. Springer-Verlag Berlin Heidelberg, 2000 Key words: GPS - Operational research - Optimal design - Heuristics - Travelling salesman problem nationallicence Dare P. Applied Geodesy Research Group, School of Surveying, University of East London, Longbridge Road, Dagenham, Essex RM8 2AS, UK e-mail: peter@uel.ac.uk; Tel.: +44 20 8223 2501; Fax: +44 20 8223 2918, GB aut Saleh H. Applied Geodesy Research Group, School of Surveying, University of East London, Longbridge Road, Dagenham, Essex RM8 2AS, UK e-mail: peter@uel.ac.uk; Tel.: +44 20 8223 2501; Fax: +44 20 8223 2918, GB aut https://doi.org/10.1007/s001900000104 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001900000104 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dare P. Applied Geodesy Research Group, School of Surveying, University of East London, Longbridge Road, Dagenham, Essex RM8 2AS, UK e-mail: peter@uel.ac.uk; Tel.: +44 20 8223 2501; Fax: +44 20 8223 2918, GB aut NATIONALLICENCE 700 1- Saleh H. Applied Geodesy Research Group, School of Surveying, University of East London, Longbridge Road, Dagenham, Essex RM8 2AS, UK e-mail: peter@uel.ac.uk; Tel.: +44 20 8223 2501; Fax: +44 20 8223 2918, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer