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

Measuring the Timing Accuracy of Satellite Time and Location (STL) Receivers

January 23, 2023

Author(s)

Peter Johnson, Andrew Novick, Michael A. Lombardi

We present measurements of the timing accuracy and stability of Satellite Time and Location (STL) receivers with respect to UTC(NIST), the coordinated universal

Measurement of Transient Environmental Effects in GPS-Disciplined Clocks

January 23, 2023

Author(s)

Andrew Novick, Michael A. Lombardi, Demetrios Matsakis, John Clark

GPS-disciplined clocks (GPSDCs) are designed to optimize the accuracy and stability of their pulse-per-second (PPS) and frequency outputs by steering an

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

A disciplined clock provides a disciplined time and a disciplined frequency synchronous with a reference clock. The disciplined clock includes: a time receiver to: receive a common view signal from the common view clock; and produce a receiver timing signal; a local clock to: receive a frequency

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Michael A. Lombardi (Assoc)

Publications

Patents (2018-Present)