Satellite navigation systems have not only revolutionized navigation, but also geodetic positioning. By means of satellite range measurements, positioning accuracies became available that were previously unknown, especially for long baselines. This has long been documented for applications of GPS, the American Global Positioning System. Besides this, there is the Russian Global Navigation Satellite Sys-tem GLONASS. Comparable to GPS from the technical point of view, it is suffering under the economic decline of the Russian Federation, which prevents it from drawing the attention it deserves. Due to the similarities of GPS and GLONASS, both systems may also be used in combined ap-plications. However, since both systems are not entirely compatible to each other, first a number of inter-operability issues have to be solved. Besides receiver hardware issues, these are mainly the differ-ences in coordinate and time reference frames. For both issues, proposed solutions are provided. For the elimination of differences in coordinate reference frames, possible coordinate transformations are introduced, determined using both a conventional and an innovative approach. Another important topic in the usage of GLONASS for high-precision applications is the fact that GLONASS satellites are distinguished by slightly different carrier frequencies instead of different PRN codes. This results in complications, when applying double difference carrier phase measurements to position determination the way it is often done with GPS. To overcome these difficulties and make use of GLONASS double difference carrier phase measurements for positioning, a new mathematical model for double difference carrier phase observations has been developed. These solutions have been implemented in a GLONASS and combined GPS/GLONASS processing software package.
«Satellite navigation systems have not only revolutionized navigation, but also geodetic positioning. By means of satellite range measurements, positioning accuracies became available that were previously unknown, especially for long baselines. This has long been documented for applications of GPS, the American Global Positioning System. Besides this, there is the Russian Global Navigation Satellite Sys-tem GLONASS. Comparable to GPS from the technical point of view, it is suffering under the eco...
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