Michael A. Lombardi

Publications

Dissemination of UTC(NIST) over 20 km of commercial optical fiber with active phase stabilization

May 2, 2024

Author(s)

Jacob VanArsdale, Matthew J. Deutch, Michael A. Lombardi, Glenn Nelson, Jeffrey Sherman, James Spicer, William Yates, Dylan Yost, Samuel Brewer

We demonstrate the transfer of a cesium frequency standard steered to UTC(NIST) over 20 km of dark telecom optical fiber. Our dissemination scheme uses an

Measuring the Frequency Accuracy and Stability of WWV and WWVH

March 1, 2023

Author(s)

Michael A. Lombardi

Radio station WWV, famous for the "at the tone ...." announcements broadcast at the top of each minute, is known to shortwave listeners and radio amateurs

Time Transfer using High-Definition Television (HDTV) Broadcast Transmitters in Common View

January 23, 2023

Author(s)

Konstantin Tarasov, Bethany Bauer, Sebastian Olsen, Eugene Graver, Howard Feil, Jeffrey Sherman, Aidan Montare, Matthew J. Deutch, Glenn Nelson, Michael A. Lombardi, Timothy Marczewski, David A. Howe

We have developed and demonstrated a time transfer system using high-definition television (HDTV) broadcast signals in common view. The system is comprised of a

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Patents (2018-Present)

Disciplined Clock for Providing a Disciplined Time and a Disciplined Frequency Synchronous with a Reference Clock

NIST Inventors

Michael A. Lombardi

Disciplined clocks work by using an external reference source to synchronize the time of their local clock, and to control the frequency of the clock’s local oscillator so that the clock is continuously kept on time. The external reference source for a disciplined clock is typically a radio

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Michael A. Lombardi (Assoc)

Publications

Patents (2018-Present)