ITS: The Nation’s Spectrum and Communications Lab

Our mission is to ADVANCE innovation in communications technologies, INFORM spectrum and communications policy for the benefit of all stakeholders, and INVESTIGATE our Nation’s most pressing telecommunications challenges through research that employees are proud to deliver. Learn more about ITS on our YouTube Channel or read about our research programs in the Technical Progress Report.


November 13, 2023

The goal of the two-year 5G Challenge was to accelerate the adoption of 5G open interfaces, interoperable subsystems,...

September 1, 2023

Employment opportunities at ITS include internships for students at all levels of their scholastic careers. Like other employment opportunities, when openings exist, these are listed on ...

May 25, 2023

Until June 2, 2023, expert researchers from ITS are in Geneva, Switzerland, where they are collaborating with colleagues from all over the world to reach consensus about improvements to the International Telecommunication...

Recent Publications

This Month in ITS History

July 1968: Irregular Terrain Model Published

In July 1968 one of ITS’s most famous publications was released. “Prediction of Tropospheric Radio Transmission Loss Over Irregular Terrain: A Computer Model” described a software product based on the groundbreaking work done for Tech Note 101 three years earlier. The FORTRAN program created by ITS engineers Anita Longley and Phil Rice is better known as the Irregular Terrain Model (ITM) or simply Longley-Rice. This was one of the first computerized models of radio propagation that could be used effectively in the real world. It incorporated general terrain features, climate, antenna characteristics, and wavelength into a general propagation model. The computerized model could be used to pre ...

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