New synchronization feature adopted in the HackRF official repository
A new time synchronization feature has been recently adopted in the HackRF official repository thanks to the collaboration between SPCOMNAV group, Università di Bologna, and the European Space Agency (ESA).
This contribution allows any user to precisely synchronize multiple HackRF devices below 50 ns, by means of a minor hardware modification and the firmware update. Time synchronisation is achieved thanks to a time pulse that can be generated either by one of the SDRs or by an external source, such as a GNSS receiver providing 1PPS signal. This solution enables the use of low-cost  software-defined radios in interesting navigation applications, such as hybrid positioning algorithms, interference localization, and cooperative positioning among others.
More information: [link].