The main purpose of this study is to develop a new Windows-based program that calculates a quality control parameter that shows the quality of Global Positioning System (GPS) observations using GPS data in a Receiver INdependent Exchange (RINEX) format. This new program, Global Positioning System Quality Control (GPSQC), allows general GPS users to easily and intuitively check the quality of GP...

The GPS (Global Positioning System) is used for navigation and positioning purposes by a diverse set of users. The navigation solution provided by a commercial GPS receiver is subject to errors contributed by various sources. These sources of errors in GPS navigation (e.g. satellite clock, receiver clock, atmospheric and multipath errors etc.) induce biases in the measurement of pseudo range an...

This paper deals with the problem of ionosphere scintillations and their impact on the GPS positioning errors

Since the improvement of special technology, the application of GPS becomes a low-cost and popular way. The construction of digital map is the base in many GPS applications. Because of these, the construction of the map is the most important thing in the application of GPS. GPS position tracing and satellite image analyzing were the most used methods in the construction of digital map. In gener...

Today, there are two Global Navigation Satellite Systems (GNSS) that are fully operational and commercially available to provide all-weather guidance virtually 24 h a day anywhere on the surface of the earth. GNSS are the collection of localization systems that use satellites to know the location of a user receiver in a global (Earth-centered) coordinate system and this has become the positioni...

We consider the problem of carrier-phase differential GPS positioning for an land vehicle navigation system (LVNS), tightly coupled with an inertial measurement unit (IMU) and a speedometer. The primary focus is to apply Bayesian network to an IMU-aided GPS positioning system based on carrierphase differential GPS. We describe the implementation details of the positioning system that integrates...

— Today almost every one use a taxi, in many countries the rate is agreed upon the service is taken, in many cases the rate is too low or high and the service is not taken, on the other hand taximeters provides good estimated of the service but are too complex to install in a cab and maintain. Today we can get advance of GPS technology to improve and enhance the taximeters while the rate is cal...

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