The 2.4.2 pXX is the stable version with the newest patches. The 2.4.3 bXX is the development or beta version with experimental implementations. Please refer the support information for bug and known problem list. Tutorial and Demonstration GNSS-SDRLIB: Open Source GNSS Software Defined Radio Library (SDR working with RTKLIB) Google play: RTKGPS+ (Android frontend of RTKLIB) Overview RTKLIB is an