The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Heart of satellite based navigation system is timing by precise clocks. In Global Navigation Satellite System (GNSS,) mainly consisting of GPS, GLONASS, Galileo and Beiduo, timing plays a vital role also. Coordination of the time scales of all these systems is very important for the optimum utilization of GNSS. It has some stringent requirements. Coordination among different constellations is also...
Fuzzy logic has long been used for control system, but not much effort has been put to use it for data smoothing. In this paper it has been attempted to find the average of a set of data by applying Fuzzy logic. Generation of membership function is crucial in such application. So this issue has been discussed in detail. This method has been applied on some arbitrarily generated test data for establishing...
It is well established that the position co-ordinates of the receiving antenna should be determined precisely in advance for getting Time of the GPS receiver through a single GPS satellite technique. So it is desirable to know the extent of accuracy of the position co-ordinate required for a particular timing accuracy. In this paper, an analytical expression relating to the position error and the...
On the Indian subcontinent, scintillations are quite frequent and intense and have a longer duration during a peak period of an 11-year solar cycle. This phenomenon quite significantly informs us about the performance of the Global Positioning System (GPS). A special experiment has particularly been conducted to study the effect of scintillations on GPS time. This paper discusses the findings of this...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.