ITM is the ION’s winter meeting with peer-reviewed technical papers related to positioning, navigation and timing and includes the ION Fellows and Annual Awards presentations.

PTTI is the annual technical conference designed to disseminate and coordinate PTTI information at the user level; review present and future PTTI requirements; inform government and industry engineers, technicians and managers of precise time and frequency technology and its problems; and provide an opportunity for an active exchange of new technology.