The execution of Global Navigation Satellite System (GNSS) can be measured by availability, accuracy and reliability. Surveying and navigation industries have been developed over the past two decades by the Global Positioning System (GPS). Real time kinematic GPS precise positioning has been playing an important role in both surveying and navigation, and has become an essential tool to precise relative positioning. However, reliable and correct ambiguity resolution depend on observation upon large number of GPS satellites. This technique is difficult to be applied on areas where the number of visible satellites are limited. With integration between GPS and GLONASS more and more accuracy and reliability happens. The deployment of GLONASS by Russian will provide double the number of navigation satellites currently available to users. With the complete co-operation of all of these Global Navigation Satellite Systems (GNSS) greater levels of availability will be reached. Therefore integrity can be expected. It is important to investigate the degree of these improvements.