With the progress of the society and the development of science technology, RTK receiver has increasingly become the most important measurement tool in surveying and mapping industry, how to make it smaller and more portable, is the main direction to explore on by researchers. 

The “small” design of GALAXY G1 does not mean “small” of each module separate, but means the systematic “small”. The miniaturization of GALAXY G1 is not only to integrate antenna, power board, OEM board and modules into such a 1L volume round box, we also have to consider the issue of electronic harass enhancement between core modules due to the reduced volume of mainframe. As far as these difficulties, we finally adopted overlay module structure using multilayer screen technology and optimizing main module technology to avoid such puzzle, which ensure the stability and accuracy of receiver.