The Institute of Navigation (ION) is a not-for-profit organization advancing Positioning, Navigation and Timing (PNT). ION's international membership is drawn from many sources including professional navigators, engineers, physicists, mathematicians, astronomers, cartographers, photogrammetrists, meteorologists, educators, geodesists, surveyors, general aviation and airline pilots, mariners and anyone interested in position-determining systems. Corporate members include corporations, civil and military government agencies, private scientific and technical institutions, universities and training academies, and consulting firms.The ION sponsors an International Technical Meeting Co-Located with the Precise Time and Time interval Systems Applications Meeting (PTTI) (January), IEEE/ION PLANS (Spring - Even Years), ION Pacific PNT (Spring - Odd Years), ION Military Division's Joint Navigation Conference (JNC) (Spring), and ION GNSS+ Meeting (September). These conferences provide a chance to present technical papers and discuss new findings with industry peers. The ION is well known for is its prestigious peer-reviewed and indexed quarterly journal, NAVIGATION. The journal publishes original, peer-reviewed articles on all areas related to the science and technology of air, sea, land and space navigation, including estimation of position, velocity, attitude, and time, and the technologies that support the determination of these quantities. Supporting technologies include navigation aids and instrumentation, algorithms and methods, error and integrity analysis, signal processing, biological navigation systems, surveying and geodesy. Editorial services for the journal are provided by professionals in government, industry, and academia.