Enhancement of Precise Point Positioning Using GPS Single Frequency Data
Global Positioning System (GPS) is one of the most essential tools in many engineering applications, and is rapidly replacing traditional surveying techniques. It is very important to get the position using GPS with high possible accuracy while considering cost, effort and time. Precise Point Positioning (PPP) is a technique that depends on data of a single receiver and GNSS precise products to decrease different types of errors to improve the positional accuracy and to overcome the limitations of relative techniques. This has been used recently as a suitable technique for many applications having the excellence of obtaining precise location using only a single receiver. On the other side, the technique needs scientific software or online services to reach the prospective precision. PPP precision depends on different parameters such as session length, mask angle, used frequencies .etc. This study depends on three different data sets. The first set located in New Cairo, Egypt, the second is in Kalabsha region, south of Egypt, and the third set contains stations from the National Geodetic Survey (NGS) organization west of USA. The main goal of the current research is to select the best parameters and services which used in post processing stage to reach the highest possible precision of static PPP based on single frequency GPS data using two different scientific software.