SOME ASPECTS ON THE IMPLEMENTATION OF GPS SUPPORT NETWORK FOR CARRYING OUT THE SEWERAGE SYSTEM IN TIUR PLACE, ALBA COUNTRY PUBLISHEDOctavius Nicolae COLTAN, Valeria CIOLAC
This paper aimed was to support the achievement of network performance of the sewerage network in Tiur place, Alba County. Tiur place is located in western of Tarnavelor Plateau, so called Plateau of Glajului, near the confluence of Little Tarnava with large Tarnava. It includes some of the interfluve between the two Tarnave, the South - West of Lopadea Hills and northern of Secaşelor Plateau. To achieve the support network, static method with five dual GPS equipment frequency was used. For determination, three fixed references were used: Alba Iulia, Mures and Sibiu. For determination, three fixed references were used: Alba Iulia, Mures and Sibiu. On the whole route, were fourteen pairs of terminals located in protected places, easily accessible by car, outside the areas of private property. For all terminals, there have been two sessions of measurements, with three references and four rovers on new points. To get more accurate results, and to ensure stability and confidence in solutions, will be use a specialized software in GPS data processing provided by Swiss company Leica, named Leica Geo Office COMBINED. This program allows data processing and network compensation. At the same time points determined by GPS, will be converted to STEREO-70 coordinates, using TRANSDAT program, version 4.01, official implemented by ANCPI Bucharest, respectively for control with Helmert parameters determined locally. New points coordinates (x, y, z), will form the basis of the design and execution works for sewerage network in the territory of Tiur place. During the campaign of GPS measurements, to achieve the support network in Tiur place, Alba County, has been confirmed once again the performance of GPS technology and its advantages compared to conventional surveying methods. In carrying out GPS measurements it is proposed to use dual frequency receivers, which allow reception of satellite signals on two frequencies L1 and L2. Due to the advantages of GPS technology, we propose its use in the measurement and remeasurement of the support networks in our country.