High-sensitivity GPS : the low cost future of GNSS?!
Schwieger, Volker
In general it has to be distinguished between GPS receivers and evaluation techniques used by surveyors, and the mass market solutions. Main difference is the accuracy that can be reached. During the last years two developments have taken place that may change the attitude of a surveyor regarding this separation. On the one hand research and implementation regarding use of low cost GPS receivers for geodetic purpose is on the way. In future this may lead to a merger of these two application fields. On the other hand the mass market gets more interesting as a working field for surveyors. The latter is connected with the catch words wireless-assisted GPS and more recently high-sensitivity GPS. These new technologies allow to establish a higher availability of GNSS signals in urban canyons or even indoor. An overview about these technologies is given in this paper as well as an insight into the respective market. The paper deals with quality characteristics like availability and accuracy of high sensitivity GPS receivers as well as navigation receivers. Recent results obtained at University Stuttgart are presented. As expected availability increases, but accuracy is reduced, if low quality signals are tracked. Additionally the possibilities for the geodetic community to reach geodeticc accuracies are outlined based on new results using low cost receivers.
Event: XXX FIG Working Week and General Assembly : Strategic Integration of Surveying Services
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