| Authors | Title | Journal | Vol No. | Page Nos. | Pub. Date | Bin No. |
| J. B. VanArsdale, M. J. Deutch, M. A. Lombardi, G. K. Nelson, J. A. Sherman, J. Spicer, W. C. Yates, D. C. Yost, and S. M. Brewer | Dissemination of UTC(NIST) over 20 km of commercial optical fiber with active phase stabilization | Opt. Lett. | 49 | 2545-2548 | 20240515 | 3266 |
| N. A. Frissell, J. R. Ackermann, J. N. Alexander, R. L. Benedict, W. C. Blackwell, Jr., R. K. Boedicker, S. A. Cerwin, K. V. Collins, S. H. Cowling, D. M. Diehl, C. Deacon, T. J. Duffy, L. B. Edson, J. Gibbons, W. D. Engelke, J. O. Farmer, R. M. Frissell, R. Gerzoff, G. Griffiths, F. M. Howell, S. Roland Kaeppler, G. Kavanagh, D. Kazdan, H. Kim, D. R. Larsen, V. Ledvina, W. Liles, S. Lo, M. A. Lombardi, E. A. MacDonald, J. Madey, F. Di Mare, T. C. McDermott, D. G. McGaw, R. W. McGwier, G. A. Mikitin, E. S. Miller, C. Mitchell, A. Montare, C. D. Nguyen, P. N. Nordberg, Sr., G. Perry, G. N. Piccini, S. W. Pozerski, Jr., R. H. Reif, J. D. Rizzo, R. S. Robinett, V. I. Romanek, S. Sami, D. F. Sanchez, M. S. Sarwar, J. A. Schwartz, H. L. Serra, H. W. Silver, T. M. Skov, D. A. Swartz, D. R. Themens, F. H. Tholley, M. L. West, B. A. Witvliet, R. C. Wilcox, D. Witten, and N. Yadav | Heliophysics and amateur radio: citizen science collaborations for atmospheric, ionospheric, and space physics research and operations | Front. Astron. Space Sci. Sec. Space Physics | 10 | 1184171/1-31 | 20231116 | 3206 |
| M. A. Lombardi | Measuring the Frequency Accuracy and Stability of WWV and WWVH | QST | 107 | 33-37 | 20230301 | 3205 |
| A. Novick, M. A. Lombardi, D. Matsakis, and J. Clark | Measurement of Transient Environmental Effects in GPS-Disciplined Clocks | Proc. 2023 PTTI Mtg. | | 10-14 | 20230124 | 3230 |
| P. Johnson, A. Novick, and M. A. Lombardi | Measuring the Timing Accuracy of Satellite Time and Location (STL) Receivers | Proc. 2023 PTTI Mtg. | | 207-215 | 20230124 | 3228 |
| K. Tarasov, B. Bauer, S. Olsen, E. Grayver, H. Feil, J. Sherman, A. Montare, M. Deutch, G. Nelson, M. Lombardi, T. Marczewski, and D. Howe | Time Transfer using High-Definition Television (HDTV) Broadcast Transmitters in Common View | Proc. 2023 PTTI Mtg. | | 140-149 | 20230124 | 3210 |
| J. W. Clark, D. N. Matsakis, A. N. Novick, and M. A. Lombardi | Establishing Traceability with a GPS Disciplined Clock: A Preliminary Report | Proc. 2022 Intl. Telemetering Conf. (ITC) | | 10 p. | 20221024 | 3167 |
| N. A. Frissell, L. Brandt, S. A. Cerwin, K. V. Collins, D. Kazdan, J. Gibbons, W. D. Engelke, R. M. Frissell, R. B. Gerzoff, S. R. Kaeppler, V. Ledvina, W. Liles, M. Lombardi, E. MacDonald, F. Di Mare, E. S. Miller, G. W. Perry, J. D. Rizzo, D. F. Sanchez, H. Lawrence Serra, H. Ward Silver, D. R. Themens, and M. L. West | Amateur Radio: An Integral Tool for Atmospheric, Ionospheric, and Space Physics Research and Operations | White Paper submitted to Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033 | | 13 p. | 20220907 | 3207 |
| M. A. Lombardi | Multi-Source Common-View Disciplined Clock: A Fail-Safe Clock for Critical Infrastructure Systems | J. Res. Natl. Inst. Stan. | 126 | 126041/1-29 | 20220110 | 3139 |
| J. A. Sherman, L. Arissian, R. C. Brown, M. J. Deutch, E. A. Donley, V. Gerginov, J. Levine, G. K. Nelson, A. N. Novick, B. R. Patla, T. E. Parker, B. K. Stuhl, D. D. Sutton, J. Yao, W. C. Yates, V. Zhang, and M. A. Lombardi | 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) | NIST Tech. Note 2187 | | 189 p. | 20211103 | 3141 |
| M. A. Lombardi | An Evaluation of Dependencies of Critical Infrastructure Timing Systems on the Global Positioning System (GPS) | NIST Tech. Note 2189 | | 65 p. | 20211101 | 3140 |
| M. A. Lombardi, B. R. Patla, A. N. Novick, D. Matsakis, and S. J. Mitchell | A Simple Method for Calibrating GPS-Disciplined Clocks via Direct Comparison to a UTC(k) Time Scale | URSI Radio Sci. Bull. | 2021 | 51-58 | 20210901 | 3165 |
| M. A. Lombardi | Synchronizing Stock Market Clocks to UTC(NIST) | Proc. XXXIIIth Gen. Assem. URSI | | 1-4 | 20200829 | 3086 |
| H. Diaz and M. Lombardi | The Official Time of Peru | IEEE CPEM 2020 Conf. Dig. | | 2 p. | 20200824 | 3120 |
| J. M. Lopez-Romero, M. Lombardi, E. de Carlos-Lopez, N. Diaz-Munoz, C. A. Ortiz, R. de Carvalho, and R. Solis | Comparison of the multi-national SIM time scale to UTC and UTCr | IEEE T. Instrum. Meas. | 69 | 4445-4452 | 20200609 | 2986 |
| M. A. Lombardi | Disciplined clock for providing a disciplined time and a disciplined frequency synchronous with a reference clock | United States Patent No. 10,466,363 B2 | | 32 p. | 20191105 | 3084 |
| M. A. Lombardi | The Reach and Impact of the Remote Frequency and Time Calibration Services at NIST | NCSLI J. Meas. Sci. | 12 | 30-37 | 20190613 | 3053 |
| D. Matsakis, J. Levine, and M. A. Lombardi | Metrological and legal traceability of time signals | InsideGNSS | 14 | 48-58 | 20190401 | 3005 |
| S. VoBa, C. L. Ulland, M. A. Lombardi, and A. Lentfer | Rethinking Timekeeping for Modern IT Solutions | Proc. 2019 PTTI Mtg. | | 374-397 | 20190131 | 3036 |
| M. A. Lombardi | The Reach and Impact of the Remote Frequency and Time Calibration Program at NIST | Proc. 2018 NCSLI Conf. | | 11 p. | 20180827 | 2960 |
| J. M. Lopez-Romero, M. Lombardi, E. de Carlos-Lopez, N. Diaz-Munoz, and C. A. Ortiz | SIM Time Scale: 10 years of operation | IEEE CPEM 2018 Conf. Dig. | | 2 p. | 20180708 | 2952 |
| A. N. Novick, M. A. Lombardi, K. Franzen, and J. Clark | Improving packet synchronization in an NTP server | Proc. 2018 PTTI Mtg. | | 256-260 | 20180130 | 2950 |
| D. Matsakis, J. Levine, and M. A. Lombardi | Metrological and legal traceability of time signals | Proc. 2018 PTTI Mtg. | | 59-71 | 20180130 | 2941 |
| M. A. Lombardi | A Historical Review of U. S. Contributions to the Atomic Definition of the SI Second | PTB-Mitt. | 127 | 41-52 | 20170901 | 2907 |
| M. A. Lombardi | A Historical Review of U. S. Contributions to the Atomic Redefinition of the SI Second in 1967 | J. Res. Natl. Inst. Stan. | 122 | 1-17 | 20170601 | 2917 |
| A. N. Novick and M. A. Lombardi | A comparison of NTP servers connected to the same reference clock and the same network | Proc. 2017 PTTI Mtg. | | 264-270 | 20170131 | 2893 |
| J. Yao, M. A. Lombardi, A. N. Novick, B. Patla, J. A. Sherman, and V. Zhang | The effects of the January 2016 UTC offset anomaly on GPS-controlled clocks monitored at NIST | Proc. 2017 PTTI Mtg. | | 155-163 | 20170131 | 2886 |
| M. A. Lombardi | Evaluating the Frequency and Time Uncertainty of GPS Disciplined Oscillators and Clocks | NCSLI J. Meas. Sci. | 11 | 30-44 | 20161201 | 2871 |
| M. A. Lombardi, A. N. Novick, G. Neville-Neil, and B. Cooke | Accurate, Traceable, and Verifiable Time Synchronization for World Financial Markets | J. Res. Natl. Inst. Stan. | 121 | 436-463 | 20161007 | 2868 |
| J. M. Lopez and M. A. Lombardi | Timekeeping in the Americas | Rev. Mex. Ast. Astr. | 46 | 1-6 | 20151001 | 2764 |
| A. N. Novick and M. A. Lombardi | Practical Limitations of NTP Time Transfer | Proc. 2015 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf. | | 570-574 | 20150413 | 2776 |
| M. A. Lombardi, J. Levine, J. Mauricio Lopez, F. Jim�nez, J. Bernard, M. Gertsvolf, H. Sanchez, O. G. Fallas, L. C. Hern�ndez Forero, R. Jos� de Carvalho, M. N. Fittipaldi, R. F. Solis, and F. Espejo | International Comparisons of Network Time Protocol Servers | Proc. 2014 PTTI Mtg. | | 57-66 | 20141204 | 2757 |
| M. A. Lombardi, A. N. Novick, and V. S. Zhang | A Low-Cost Time Transfer Receiver for Contributions to Coordinated Universal Time | J. Res. Natl. Inst. Stan. | 119 | 583-601 | 20141106 | 2742 |
| J. M. Lopez-Romero, N. Diaz-Munoz, E. de Carlos-Lopez, M. A. Lombardi, M. Gertsvolf, and R. de Carvalho | Improvements in SIM Time Network and SIM Time Scale Performance | Proc. 2014 CENAM Metrology Symp. | | 6 p. | 20141010 | 2735 |
| J. M. Lopez-Romero, M. A. Lombardi, N. Diaz-Munoz, and E. de Carlos-Lopez | Improved Performance, Remote Realization, and Accessibility of the Inter-American Metrology System (SIM) Time Scale | Proc. 2014 NCSLI Conf. | | 22 p. | 20140728 | 2720 |
| M. A. Lombardi and G. K. Nelson | WWVB: A Half Century of Delivering Accurate Frequency and Time by Radio | J. Res. Natl. Inst. Stan. | 119 | 25-54 | 20140312 | 2702 |
| M. A. Lombardi | Frequency Measurement | The Measurement, Instrumentation, and Sensors Handbook (2nd edition) | Ch. 42 | 26 p. | 20140203 | 2496 |
| M. A. Lombardi | Time Measurement | The Measurement, Instrumentation, and Sensors Handbook (2nd edition) | Ch. 41 | 21 p. | 20140203 | 2488 |
| J. M. L�pez-Romero, M. A. Lombardi, N. Diaz-Mu�oz, and E. de Carlos-Lopez | SIM Time Scale | IEEE T. Instrum. Meas. | 62 | 3343-3350 | 20131106 | 2613 |
| M. A. Lombardi, J. M. Lopez-Romero and N. Diaz-Munoz | Automated Control of National Time Standards via the SIM Time Scale | Proc. 10th Intl. Cong. Electrical Metrology (SEMETRO) | | 4 p. | 20130927 | 2678 |
| M. A. Lombardi | Determining the Uncertainty of Frequency Measurements Referenced to GPS Disciplined Oscillators | Proc. 2013 NCSLI Conf. | | 17 p. | 20130715 | 2683 |
| M. A. Lombardi, A. N. Novick, J. M. Lopez-Romero, and R. Ramos | Replicating UTC(NIST) at Remote Sites | Proc. 2012 PTTI Mtg. | | 79-90 | 20121126 | 2659 |
| M. Narins, P. Enge, B. Peterson, S. Lo, Y. Chen, D. Akos, and M. Lombardi | The Need for a Robust and Precise Time and Frequency Alternative to Global Navigation Satellite Systems | The Journal of Air Traffic Control | 55 | 40-46 | 20121101 | 2721 |
| M. Narins, P. Enge, B. Peterson, S. Lo, Y. Chen, D. Akos, and M. Lombardi | The Need for a Robust, Precise Time and Frequency Alternative to GNSS | GPS World | 23 | 8-12 | 20121101 | 2662 |
| J. M. L�pez-Romero, M. A. Lombardi, N. Diaz-Mu�oz, and E. de Carlos-Lopez | A new algorithm for clock weights for the SIM time scale | Proc. 2012 CENAM Metrology Symp. | | 488-493 | 20121008 | 2623 |
| M. A. Lombardi | Microsecond Accuracy at Multiple Sites: Is it possible without GPS? | IEEE Instru. Meas. Mag. | 15 | 14-21 | 20121002 | 2620 |
| M. Narins, P. Enge, B. Peterson, S. Lo, Y. Chen, D. Akos, and M. Lombardi | The Need for a Robust Precise Time and Frequency Alternative to Global Navigation Satellite Systems | Proc. 2012 ION GNSS Mtg. | | 6 p. | 20120917 | 2654 |
| J. M. L�pez-Romero, M. A. Lombardi, N. Diaz-Mu�oz, and E. de Carlos-L�pez | International time and frequency comparisons in real time: recent results | IEEE CPEM 2012 Conf. Dig. | | 694-695 | 20120702 | 2600 |
| J. M. Lopez-Romero, M. A. Lombardi, N. D�az-Mu�oz | Automated Clock Comparisons and Time Scale Generation in the SIM Region | MAPAN-J. Metrol. Sci. I. | 27 | 49-53 | 20120421 | 2586 |
| M. A. Lombardi | The Evolution of Time Measurement, Part 5: Radio Controlled Clocks | IEEE Instru. Meas. Mag. | 15 | 49-55 | 20120404 | 2536 |
| M. A. Lombardi | The Evolution of Time Measurement, Part 4: The Atomic Second | IEEE Instru. Meas. Mag. | 15 | 47-51 | 20120201 | 2585 |
| M. A. Lombardi | The Evolution of Time Measurement, Part 3: Atomic Clocks | IEEE Instru. Meas. Mag. | 14 | 46-49 | 20111201 | 2535 |
| M. A. Lombardi | The Evolution of Time Measurement, Part 2: Quartz Clocks | IEEE Instru. Meas. Mag. | 14 | 41-48 | 20111001 | 2534 |
| R. F. Solis, L. M. Mojica, H. Sanchez, O. G. Fallas, J. M. L.-Romero, F. Jim�nez, H. Diaz, H. Postigo, D. Perez, W. Adad, V. Masi, A. Ibrahim, M. A. Lombardi, B. Hoger, R. J. de Carvalho, J. L. M. Kronenberg, G. C. Orozco, T. Reddock, D Slomovitz, and L. Trigo | An Interlaboratory Stopwatch Comparison in the SIM Region | NCSLI Measure J. Meas. Sci. | 6 | 50-56 | 20110901 | 2571 |
| J. M. Lopez, M. A. Lombardi, A. N. Novick, F. Jimenez, N. Diaz-Mu�oz, E. C. Lopez, J. Boulanger, R. Pelletier, R. Carvalho, R. Solis, H. Sanchez, L. C. H. Forero, J. Gordon, D. Perez, E. Bances, L. Trigo, V. Masi, H. Postigo, A. Questelles, A. Gittens, and R. Ramos | Real-Time Generation of the SIM Time Scale (SIMT) from International Clock Comparisons | Proc. XXXth Gen. Assem. URSI | | 4 p. | 20110813 | 2505 |
| M. A. Lombardi | First in a Series on the Evolution of Time Measurement: Celestial, Flow, and Mechanical Clocks | IEEE Instru. Meas. Mag. | 14 | 45-51 | 20110801 | 2533 |
| M. A. Lombardi, A. N. Novick, J. M. Lopez-Romero, F. Jimenez, E. de Carlos-Lopez, J. S. Boulanger, R. Pelletier, R. de Carvalho, R. Solis, H. Sanchez, C. A. Quevedo, G. Pascoe, D. Perez, E. Bances, L. Trigo, V. Masi, H. Postigo, A. Questelles, and A. Gittens | The SIM Time Network | J. Res. Natl. Inst. Stan. | 116 | 557-572 | 20110301 | 2450 |
| M. A. Lombardi | A NIST Disciplined Oscillator: Delivering UTC(NIST) to the Calibration Laboratory | NCSLI Measure J. Meas. Sci. | 5 | 46-54 | 20101201 | 2478 |
| V. Zhang and M. A. Lombardi | Evaluation of a GPS Receiver for Code and Carrier-Phase Time and Frequency Transfer | Proc. 2010 PTTI Mtg. | | 275-283 | 20101115 | 2490 |
| J. M. Lopez-Romero, M. A. Lombardi, and N. Diaz-Munoz | SIM time scales | Proc. 2010 CENAM Metrology Symp. | | 8 p. | 20101027 | 2430 |
| J. M. Lopez-Romero and M. A. Lombardi | The Development of a Unified Time and Frequency Program in the SIM Region | NCSLI Measure J. Meas. Sci. | 5 | 30-36 | 20100901 | 2473 |
| J. M. Lopez-Romero and M. A. Lombardi | Challenges in SIM to Create a Coordination Program for Time and Frequency | Proc. 2010 NCSLI Conf. | | 10 p. | 20100726 | 2456 |
| M. A. Lombardi | A NIST Disciplined Oscillator | Proc. 2010 NCSLI Conf. | | 13 p. | 20100726 | 2455 |
| M. A. Lombardi | The End of an Era: LORAN-C is Shut Down | NCSLI Measure J. Meas. Sci. | 5 | 12, 15 | 20100601 | 2461 |
| M. A. Lombardi and A. P. Dahlen | A common-view disciplined oscillator | Rev. Sci. Instrum. | 81 | 055110 (6) | 20100524 | 2446 |
| M. A. Lombardi | How Accurate is a Radio Controlled Clock? | The Horological Journal | 152 | 108-111 | 20100301 | 2429 |
| M. A. Lombardi and V. Zhang | Distributing UTC(NIST) to Industrial Time and Frequency Users | Proc. 2009 Encuentro Nacional de Metrologia Electrica (ENME) | | 5 p. | 20091118 | 2428 |
| M. A. Lombardi, A. N. Novick, J. P. Lowe, M. J. Deutch, G. K. Nelson, D. D. Sutton, W. C. Yates, and D. W. Hanson | WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers (2009 edition) | NIST Spec. Publ. 960-14 | | 68 p. | 20090908 | 2422 |
| J. M. Lopez-Romero, N. Diaz-Munoz, and M. A. Lombardi | Establishment of the SIM Time Scale | INFOSIM | | 39-43 | 20090801 | 2431 |
| M. A. Lombardi | The SIM Time Network and its Contributions to Metrology in the Americas | Metrologist | 2 | 16-21 | 20090401 | 2360 |
| J. C. Gust, R. M. Graham, and M. A. Lombardi | Stopwatch and Timer Calibrations (2009 edition) | NIST Spec. Publ. 960-12 | | 82 p. | 20090128 | 2281 |
| M. A. Lombardi and A. Dahlen | Locking a Rubidium Oscillator to a Remote Time Scale Using Real-Time Common-View GPS Measurements | Proc. 2008 PTTI Mtg. | | 527-542 | 20081201 | 2342 |
| K. Montgomery and M. A. Lombardi | PTTI Capabilities of the Modernized LORAN System | Proc. 2008 PTTI Mtg. | | 507-526 | 20081201 | 2341 |
| V. Zhang and M. A. Lombardi | Time and Frequency Transfer Activities at NIST | Proc. 2008 PTTI Mtg. | | 623-639 | 20081201 | 2337 |
| M. A. Lombardi, A. N. Novick, J. M. Lopez, F. Jimenez, J. S. Boulanger, R. Pelletier, R. de Carvalho, R. Solis, C. Donado, H. Sanchez, C. A. Quevedo, G. Pascoe, and D. Perez | The SIM Time and Frequency Network | INFOSIM | | 15-25 | 20081201 | 2321 |
| J. M. Lopez-Romero, N. Diaz-Munoz, and M. A. Lombardi | Establishment of the SIM Time Scale | Proc. 2008 CENAM Metrology Symp. | | 5 p. | 20081022 | 2306 |
| M. A. Lombardi | The Use of GPS Disciplined Oscillators as Primary Frequency Standards for Calibration and Metrology Laboratories | NCSLI Measure J. Meas. Sci. | 3 | 56-65 | 20080901 | 2297 |
| M. A. Lombardi | The Use of GPS Disciplined Oscillators as Primary Frequency Standards for Calibration Laboratories | Proc. 2008 NCSLI Conf. | | 16 p. | 20080804 | 2294 |
| J. M. Lopez, M. A. Lombardi, A. N. Novick, J. Boulanger, R. de Carvalho, R. Solis, and F. Jimenez | The SIM Network: Improved Time Coordination for North, Central and South America | Proc. 2008 EFTF Conf. | | 9 p. | 20080423 | 2283 |
| M. A. Lombardi | Selecting a Primary Frequency Standard for a Calibration Laboratory | Cal Lab. Int. J. Metrology | 15 | 33-39 | 20080401 | 2289 |
| M. A. Lombardi | The Accuracy and Stability of Quartz Watches | The Horological Journal | 150 | 57-59 | 20080201 | 2276 |
| M. A. Lombardi, T. P. Heavner, and S. R. Jefferts | NIST Primary Frequency Standards and the Realization of the SI Second | NCSLI Measure J. Meas. Sci. | 2 | 74-89 | 20071201 | 2039 |
| M. A. Lombardi, V. Zhang, and R. de Carvalho | Long Baseline Comparisons of the Brazilian National Time Scale to UTC(NIST) Using Near Real-Time and Post-Processed Solutions | Proc. 2007 PTTI Mtg. | | 415-426 | 20071127 | 2270 |
| M. A. Lombardi | SIM Network Improves Time Coordination | NCSLI Measure J. Meas. Sci. | 2 | 18 | 20070601 | 2231 |
| M. A. Lombardi | Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24 hours in a day? | Sci. Am. | | 3 p. | 20070305 | 2209 |
| M. A. Lombardi and A. N. Novick | Effects of the Rooftop Environment on GPS Time Transfer | Proc. 2006 PTTI Mtg. | | 449-465 | 20061205 | 2199 |
| M. A. Lombardi, A. N. Novick, J. M. Lopez, J. S. Boulanger, R. Pelletier, and C. Donado | Time Coordination Throughout the Americas via the SIM Common-View GPS Network | Proc. 2006 PTTI Mtg. | | 427-437 | 20061205 | 2198 |
| M. A. Lombardi and A. N. Novick | Remote Time Calibrations via the NIST Time Measurement and Analysis Service | NCSLI Measure J. Meas. Sci. | 1 | 50-59 | 20061201 | 2170 |
| J. M. Lopez, M. A. Lombardi, A. N. Novick, J. Boulanger, R. Pelletier, and C. Donado | SIM Time and Frequency Comparison Network in Near Real Time | Proc. 2006 CENAM Metrology Symp. | | 5 p. | 20061025 | 2143 |
| M. A. Lombardi | Comparing LORAN Timing Capability to Industrial Requirements | Proc. 2006 Int. Loran Assoc. Mtg. | | 14 p. | 20061023 | 2193 |
| M. A. Lombardi | Legal and Technical Measurement Requirements for Time and Frequency | NCSLI Measure J. Meas. Sci. | 1 | 60-69 | 20060901 | 2125 |
| M. A. Lombardi and A. N. Novick | The NIST Time Measurement and Analysis Service | Proc. 2006 NCSLI Conf. | | 19 p. | 20060807 | 2132 |
| M. A. Lombardi | Time Signal Stations | Radio Time | 15 | 122-136 | 20060701 | 2131 |
| M. A. Lombardi, C. Norman, and W. J. Walsh | The Role of LORAN Timing in Telecommunications | Proc. 2006 RTCM Conf. | | 21 p. | 20060508 | 2142 |
| M. A. Lombardi | Radio Controlled Wristwatches | The Horological Journal | 148 | 187-190 | 20060501 | 2127 |
| M. A. Lombardi | Legal and Technical Requirements for Time and Frequency Metrology | Proc. 2006 Meas. Sci. Conf. | | 11 p. | 20060302 | 2111 |
| M. A. Lombardi | Does Anybody Really Know What Time It Is? 24/7/365, Here's How Time Got On Your Best Side | Popular Communications | 24 | 8-19 | 20060201 | 2074 |
| M. A. Lombardi, T. P. Celano, and E. D. Powers | The Potential Role of Enhanced LORAN-C in the National Time and Frequency Infrastructure | Proc. 2005 Int. Loran Assoc. Mtg. | | 15 p. | 20051017 | 2105 |
| M. A. Lombardi, A. N. Novick, J. M. Lopez, J. S. Boulanger, and R. Pelletier | The Inter-American Metrology System (SIM) Common-View GPS Comparison Network | Proc. 2005 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI | | 691-698 | 20050829 | 2089 |
| M. A. Lombardi, A. N. Novick, and V. Zhang | Characterizing the Performance of GPS Disciplined Oscillators with Respect to UTC(NIST) | Proc. 2005 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI | | 677-684 | 20050829 | 2086 |
| M. A. Lombardi and D. W. Hanson | The GOES Time Code Service, 1974 - 2004: A Retrospective | J. Res. Natl. Inst. Stan. | 110 | 79-96 | 20050227 | 2013 |
| M. A. Lombardi | Characteristics of Time and Frequency Measurement | Handbook of Measuring Systems Design | Ch. 199 | 1341-1345 | 20050201 | 1845 |
| M. A. Lombardi | Calibrations and Standards in Time Measurement | Handbook of Measuring Systems Design | Ch. 200 | 1346-1350 | 20050201 | 1844 |
| M. A. Lombardi, A. N. Novick, J. P. Lowe, M. Deutch, G. K. Nelson, D. Sutton, W. Yates, and D. W. Hanson | WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers | NIST Spec. Publ. 960-14 | | 64 p. | 20050101 | 1976 |
| G. K. Nelson, M. A. Lombardi, and D. T. Okayama | NIST Time and Frequency Radio Stations: WWV, WWVH, and WWVB | NIST Spec. Publ. 250-67 | | 161 p. | 20050101 | 1969 |
| M. A. Lombardi | Remote Frequency Calibrations: The NIST Frequency Measurement and Analysis Service | NIST Spec. Publ. 250-29 | | 90 p. | 20040630 | 1950 |
| Y. Tang, M. A. Lombardi, and D. A. Howe | Frequency Uncertainty Analysis for Josephson Voltage Standard | IEEE CPEM 2004 Conf. Dig. | | 338-339 | 20040628 | 1931 |
| J. C. Gust, R. M. Graham, and M. A. Lombardi | Stopwatch and Timer Calibrations | NIST Spec. Publ. 960-12 | | 63 p. | 20040531 | 1930 |
| T. Celano, K. Carroll, C. Biggs, and M. A. Lombardi | Common-View LORAN-C as a Backup to GPS for Precise Time Recovery | Proc. 2003 PTTI Mtg. | | 81-92 | 20031202 | 1929 |
| T. Celano, K. Carroll, C. Biggs, and M. Lombardi | Common-view LORAN-C for precision time and frequency transfer | Proc. 2003 Int. Loran Assoc. Mtg. | | 10 p. | 20031103 | 1922 |
| M. A. Lombardi | Radio Controlled Clocks | Proc. 2003 NCSLI Conf. | | 18 p. | 20030817 | 1877 |
| M. A. Lombardi, J. P. Lowe, and D. B. Sullivan | Proposed System for Assuring Time and Frequency Coordination Among SIM Member Nations | Jamaican Reg. Stand. & Metrology Workshop | | 10 p. | 20030505 | 1878 |
| M. A. Lombardi | Time Flies! Radio Signals Used for Time and Frequency Measurements | Cal Lab Int. J. Metrology | 10 | 22-31 | 20030501 | 1843 |
| M. A. Lombardi, A. N. Novick and R. M. Graham | Remote Calibration of a GPS Timing Receiver to UTC(NIST) via the Internet | Proc. 2003 Meas. Sci. Conf. | | 8 p. | 20030116 | 1824 |
| M. A. Lombardi and A. N. Novick | Comparison of the One-Way and Common-View GPS Measurement Techniques using a Known Frequency Offset | Proc. 2002 PTTI Mtg. | | 39-51 | 20021203 | 1827 |
| J. Levine, M. A. Lombardi, and A. N. Novick | NIST Computer Time Services: Internet Time Service (ITS), Automated Computer Time Service (ACTS), and time.gov Web Sites | NIST Spec. Publ. 250-59 | | 79 p. | 20020501 | 1551 |
| M. A. Lombardi | Time and Frequency From A to Z: An Illustrated Glossary | http://tf.nist.gov | | 53 p. | 20020329 | 1548 |
| A. N. Novick, P. R. Franchois, M. A. Lombardi, and W. D. Lee | Time Distribution Using the World Wide Web | Proc. 2002 Meas. Sci. Conf. | | 5 p. | 20020124 | 1499 |
| M. A. Lombardi | NIST Time and Frequency Services | NIST Spec. Publ. 432 | | 80 p. | 20020120 | 1383 |
| M. A. Lombardi | Time and Frequency | Encyclopedia of Physical Science and Technology-Third Edition | 16 | 783-801 | 20020102 | 1496 |
| M. A. Lombardi | NIST Frequency Measurement and Analysis System: Operator's Manual | NISTIR 6610 | | 108 p. | 20011001 | 1469 |
| M. A. Lombardi, L. M. Nelson, A. N. Novick, and V. S. Zhang | Time and Frequency Measurements Using the Global Positioning System (GPS) | Cal Lab Int. J. Metrology | 8 | 26-33 | 20010801 | 1424 |
| J. Levine, M. A. Lombardi, L. M. Nelson, and V. S. Zhang | Technical Reference Manual for NIST Automated Computer Time Service (ACTS) | NISTIR 6611 | | 95 p. | 20010726 | 1422 |
| M. A. Lombardi | Fundamentals of Time and Frequency | The Mechatronics Handbook | Ch. 17 | 20 p. | 20010424 | 1498 |
| M. A. Lombardi, L. M. Nelson, A. N. Novick, and V. S. Zhang | Time and Frequency Measurements Using the Global Positioning System (GPS) | Proc. 2001 Meas. Sci. Conf. | | 10 p. | 20010125 | 1417 |
| A. N. Novick, M. A. Lombardi, V. S. Zhang, and A. Carpentier | High Performance Multi-Channel Time Interval Counter with Integrated GPS Receiver | Proc. 1999 PTTI Mtg. | | 561-568 | 19991206 | 1405 |
| M. A. Lombardi | Traceability in Time and Frequency Metrology | Cal Lab Int. J. Metrology | 6 | 33-40 | 19991001 | 1305 |
| M. A. Lombardi | Traceability in Time and Frequency Metrology | Proc. 1999 NCSL Conf. | | 45-56 | 19990624 | 1297 |
| M. A. Lombardi | Automation of NIST Frequency Calibrations at Remote Sites | Proc. IEEE Instrum. Meas. Conf. | | 618-622 | 19990524 | 1298 |
| M. A. Lombardi | Traceability in Time and Frequency Metrology | Proc. 1999 MQGT Conf. | | 30-39 | 19990224 | 1467 |
| M. A. Lombardi | Frequency Measurement | The Measurement, Instrumentation, and Sensors Handbook | Ch. 19 | 24 p. | 19990101 | 1280 |
| M. A. Lombardi | Time Measurement | The Measurement, Instrumentation, and Sensors Handbook | Ch. 18 | 17 p. | 19990101 | 1279 |
| M. A. Lombardi | NIST Global Positioning System (GPS) Data Archive | http://tf.nist.gov | | 9 p. | 19980720 | 1502 |
| M. A. Lombardi | An Introduction to Frequency Calibration - Part II | Cal Lab Int. J. Metrology | 3 | 28-34 | 19960401 | 1435 |
| M. A. Lombardi | Computer Timekeeping | Proc. 1996 Meas. Sci. Conf. | | 16 p. | 19960125 | 1341 |
| M. A Lombardi | An Introduction to Frequency Calibration - Part I | Cal Lab Int. J. Metrology | 3 | 17-28 | 19960101 | 1081 |
| M. A. Lombardi and L. M. Nelson | Recent Improvements Made to the NIST Frequency Measurement Service | Proc. 1995 NCSL Conf. | | 793-804 | 19950716 | 1075 |
| M. A. Lombardi | The NIST Frequency Measurement Service | Cal Lab Int. J. Metrology | 2 | 11-17 | 19950501 | 1067 |
| M. A. Lombardi | The NIST Frequency Measurement Service | Proc. 1995 Meas. Sci. Conf. | | 12 p. | 19950126 | 1552 |
| V. S. Zhang, D. D. Davis, and M. A. Lombardi | High Resolution Time Interval Counter | Proc. 1994 PTTI Mtg. | | 191-200 | 19941206 | 870 |
| M. A. Lombardi | How to Get NIST Traceable Time on Your Computer | Proc. 1994 NCSL Conf. | | 299-313 | 19940731 | 834 |
| M. A. Lombardi and R. E. Beehler | Time and Frequency Services Offered by the National Institute of Standards and Technology (NIST) | Proc. 1993 Preci. Meas. Power Sys. Conf. | | 11 p. | 19931027 | 1065 |
| M. A. Lombardi | Keeping Time on Your PC | BYTE | 18 | 57-62 | 19931001 | 1026 |
| M. A. Lombardi | Using LORAN-C Broadcasts for Automated Frequency Calibrations | Proc. 1992 NCSL Conf. | | 361-373 | 19920802 | 651 |
| D. Kirchner, U. Thyr, H. Ressler, R. Robnik, P. Grudler, F. Baumont, Ch. Veillet, W. Lewandowski, D. W. Hanson, A. J. Clements, J. L. Jespersen, D. A. Howe, M. A. Lombardi, W. J. Klepczynski, P. J. Wheeler, W. Powell, A. Davis, P. Uhrich, R. Tourde | Comparison of Two-Way Satellite Time Transfer and GPS Common-View Time Transfer Between OCA and TUG | Proc. 1991 PTTI Mtg. | | 71-88 | 19911203 | 981 |
| M. A. Lombardi | Laboratory Automation: The Design Philosophy of the NIST Frequency Measurement Service | Proc. 1991 NCSL Conf. | | 277-287 | 19910818 | 920 |
| R. E. Beehler and M. A. Lombardi | NIST Time and Frequency Services | NIST Spec. Publ. 432 | | 38 p. | 19910601 | 85 |
| P. Uhrich, R. Tourde, M. Granveaud, P. Grudler, F. Baumont, Ch. Veillet, D. Feraudy, J. M. Mangin, J. Gaignebet, J. L. Hatat, D. J. Hanson, A. J. Clements, J. L. Jespersen, M. A. Lombardi, D. Kirchner, U. Thyr, G. Kirchner, H. Ressler, W. J. Klepczynski | Preliminary Comparison of Time Transfers via LASSO, GPS and Two-Way Satellite | Proc. 1991 EFTF Conf. | | 96-104 | 19910312 | 184 |
| C. Veillet, D. Feraudy, J. M. Torre, J. F. Mangin, P. Grudler, F. Baumont, J. Gaignebet, J. L. Hatat, D. W. Hanson, A. J. Clements, J. L. Jespersen, M. A. Lombardi, D. Kirchner, G. Kirchner, H. Ressler, S. Fassi, W. J. Klepczynski, P. J. Wheeler, W. Powell | LASSO, Two-way and GPS time comparisons: a (very) preliminary status report | Proc. 1990 PTTI Mtg. | | 575-582 | 19901204 | 908 |
| G. Kamas and M. A. Lombardi | Time and Frequency Users Manual | NIST Spec. Publ. 559 | | 164 p. | 19901001 | 461 |
| D. A. Howe, D. W. Hanson, J. L. Jespersen, and M. A. Lombardi | Satellite Two-Way Time Transfer: Fundamentals and Recent Progress | Proc. 1989 PTTI Mtg. | | 117-128 | 19891222 | 863 |
| D. A. Howe, D. W. Hanson, J. L. Jespersen, M. A. Lombardi, W. J. Klepczynski, P. J. Wheeler, M. Miranian, W. Powell, J. Jeffries, and A. Myers | NIST-USNO Time Comparisons Using Two-Way Satellite Time Transfers | Proc. 1989 IEEE Freq. Cont. Symp. | | 193-198 | 19890531 | 839 |
| F. L. Walls, A. J. Clements, C. M. Felton, M. A. Lombardi, and M. D. Vanek | Extending the Range and Accuracy of Phase Noise Measurements | Proc. 1988 IEEE Freq. Cont. Symp. | | 432-441 | 19880601 | 789 |
| G. Kamas and M. A. Lombardi | Traceable Frequency Calibrations: How to Use the NBS Frequency Measurement System in the Calibration Lab | NBS Spec. Publ. 250-29 | | 48 p. | 19880101 | 745 |
| G. Kamas and M. A. Lombardi | A New System for Measuring Frequency | Proc. 1985 NCSL Conf. | | 224-230 | 19850715 | 1414 |
