Michael A. Lombardi

Publications

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

Multi-Source Common-View Disciplined Clock: A Fail-Safe Clock for Critical Infrastructure Systems

January 10, 2022

Author(s)

Michael A. Lombardi

The multi-source common-view disciplined clock (MSCVDC) is a recent NIST invention designed to support critical infrastructure timing systems that require a

A Resilient Architecture for the Realization and Distribution of Coordinated Universal Time to Critical Infrastructure Systems in the United States: Methodologies and Recommendations from the National Institute of Standards and Technology (NIST)

November 3, 2021

Author(s)

Jeffrey Sherman, Ladan Arissian, Roger Brown, Matthew J. Deutch, Elizabeth Donley, Vladislav Gerginov, Judah Levine, Glenn Nelson, Andrew Novick, Bijunath Patla, Tom Parker, Benjamin Stuhl, Jian Yao, William Yates, Michael A. Lombardi, Victor Zhang, Douglas Sutton

The Time and Frequency Division of the National Institute of Standards and Technology (NIST), an agency of the United States Department of Commerce (DOC), was

An Evaluation of Dependencies of Critical Infrastructure Timing Systems on the Global Positioning System (GPS)

November 1, 2021

Author(s)

Michael A. Lombardi

Accurate and reliable time signals are an essential part of critical infrastructure systems in the United States. Because these systems often cannot function

View more Publications

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

View All Patents

Michael A. Lombardi (Assoc)

Publications

Patents (2018-Present)