Analyses of different types of errors for better precision in GNSS

World is moving forward and getting brighter future day by day because of the technological advancement. Each creation of innovation has its own particular importance. Global Navigation Satellite System (GNSS) is such an innovation which is playing a vital role. The most important components are Global Positioning System (GPS) and Galileo but some other systems are also mentioned like GLONASS, BEIDOU and QZSS (quasi-zenith satellite system). While a satellite orbiting about 12,551 miles above the earth surface transmitting a signal must have some errors. For better accuracy, errors must be minimized to an optimum level. The most common errors that affect GNSS receivers have been studied in this paper. After knowing each system, the main sources of errors and how they affect the quality of precision of the receiver can be determined which will lead to attain better performance.