It is my pleasure to join X-Sense project, a great platform well linking my job and Ph. D research.  I am glad to work with partners from different  professional fields. My focus is on GPS data processing. Low-cost single-frequency GPS instrument is expected to provide high accuracy, near real time positions to serve the project as one of the displacement monitoring tools. It also creates the possibility to built up early warning system for landslide, rock fall and so on.