Description
High-precision real-time positioning service (HEPS); The satellite positioning service of the German state survey SAPOS® is a joint product of the Working Group of the Surveying Administrations of the Federal States of Germany (AdV). SAPOS® provides up-to-date spatial references for everyone with modern technology. As an infrastructural basic service, this is part of the statutory mandate of the German state surveying. SAPOS® uses the NAVSTAR - GPS ( Navigation System with Timing and Ranging - Global Positioning System ), a satellite navigation system originally set up for military purposes. For civilian GPS users with only one GPS receiver, positioning accuracies of 10 - 20 meters are possible. Higher accuracies can only be achieved by relative GPS (DGPS - Differential GPS ). Previously, the user had to work with at least two receivers, one of which was operated as a temporary reference station at a known point.SAPOS® has set up a permanently operated, multifunctional DGPS service. SAPOS® is based on a network of flat-distributed GPS reference stations, which offer the user the possibility to use relative GPS methods with only one receiver. This allows him to perform his GPS positioning tasks with high efficiency and minimal investment. To ensure effective and secure use and to adapt to the respective technical progress, SAPOS® in Thuringia is structured in such a way that it can be used centrally and decentrally in a centralized control, monitoring, user administration and user billing and can be gradually expanded according to the respective requirements.
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