Free academic version of iP-Solutions GNSS DIF simulator is bundled with our book from Cambridge University Press.

The simulator can generate GNSS RF signal now.  It also features record and playback functions for GNSS signals on L1,L2 and L5 frequencies.
http://www.ip-solutions.jp/regen.html
http://www.ip-solutions.jp/replicator.html

For more details on the simulator and its comparison with others see Tony Murfin's article in GPS World "What’s New in GNSS Simulation?".Tony Murfin's article in GPS World "What’s New in GNSS Simulation?"

Free real-time software receiver.

Academic version of this real-time GPS software receiver comes free with this book  from Cambridge University Press:
Digital Satellite Navigation and Geophysics: A Practical Guide with GNSS Signal Simulator and Receiver Laboratory.

Hello! This blog is about GNSS for everybody, in particular about tools and instruments, which make this technology available on your desktop, ...and about books.