Welcome to
		Your source for the Stable Frequency Stability Analysis program.
		Hamilton Technical Services 650 Distant Island Drive Beaufort, SC 29907 USA Phone:  843-525-6495 Fax: 843-525-0251

News

• Request an update to Stable32 Version 1.59 (licensed Stable32 users only). Software
• Buy a printed version of the Stable32 User Manual. Book
• Take a virtual tour of the Stable32 program. Tour
• Download a copy of NIST Special Publication 1065, Handbook of Frequency Stability Analysis.

Contents

• General Information General information about Hamilton Technical Services.
• Products Information about our software products.
• Papers On-line papers about frequency stability analysis.
• Data Test data for frequency stability analysis.
• Software Updates for the Stable program and documentation.
• Links Links to other web sites with time and frequency information.
• Contact Information How to contact us.

General Information

Products

Our premier product is Stable32, a full-featured Windows® program that provides all the functions needed to perform time-domain analysis of frequency stability data.  Click on the links below to obtain a data sheet and ordering information, or a pdf brochure, for this product. Stable32 Datasheet/Order Form Stable32 Brochure Stable32 Site License Click on the following link to take a virtual tour of the Stable32 program. Tour Many leading government and commercial time and frequency laboratories use the Stable programs for frequency stability analysis. Stable Users

Papers and Publications

• W. J. Riley, "The Calculation of Time Domain Frequency Stability".
• W.J. Riley, "The Basics of Frequency Stability Analysis".
• W.J. Riley, "The Hadamard Variance".
• W.J. Riley, "Methodologies for Time Domain Frequency Stability Measurement and Analysis".
• W.J. Riley, "Stable32 Frequency Domain Functions".
• W.J. Riley, "Properties of FFT Windows Used in Stable32".
• W.J. Riley, "Evaluating the Level of Discrete Components in Stable32 PSD Plots".
• W.J. Riley, "Stable32 Automation Functions".
• W.J. Riley, "Launching and Opening Data Files in Stable32".
• W.J. Riley, "Using WinBatch to Automate a Stable32 Frequency Stability Analysis".
• W.J. Riley, "Confidence Intervals and Bias Corrections for the Stable32 Variance Functions".
• W.J. Riley, "Application of the 3-Cornered Hat Method to the Analysis Of Frequency Stability".
• W.J. Riley, "Gaps, Outliers, Dead Time, and Uneven Spacing in Frequency Stability Data".
• W.J. Riley, "References for Frequency Stability Analysis".
• W.J. Riley, "Techniques for Frequency Stability Analysis".
• W.J. Riley, "Use of the Autocorrelation Function for Frequency Stability Analysis".
• W.J. Riley, "Curve Fitting Features in Stable32".
• W.J. Riley, "The FrequenC Library".
• W.J. Riley, "Capturing Data from Symmetricom Phase Noise and Allan Deviation Test Sets for Analysis by Stable32".
• W.J. Riley, "Algorithms for Frequency Jump Detection".
• W.J. Riley, "Frequency Jump Detection and Analysis".
• W.J. Riley, "Frequency Jump Detection in Stable32".
• W.J. Riley, "Calculation Times in Stable32".
• W.J. Riley, "Spur Detection, Analysis and Removal in Stable32".
• W.J. Riley, "The Stable32 Filter Function".
• W.J. Riley, Handbook of Frequency Stability Analysis. You can buy a printed copy of this book at Handbook, and download it as NIST Special Publication 1065.
• W.J. Riley, "The Quartz Crystal Anomaly Detector". 
• W.J Riley, "A Small DMTD System".
• W.J. Riley, "Examples of 1 PPS Clock Measuring Systems".
• W.J. Riley, "PICTIC Interpolator Linearity".
• W.J. Riley, "The Averaging of Phase and Frequency Data".
• W.J. Riley, "A Simple USB RF Power Meter".
• W.J. Riley, "A 10 MHz OCVCXO and PLL Module".
• W.J. Riley, "An Octal 10 MHz Distribution Amplifier".
• W.J. Riley, "Clock Measurements Using the BI220 TIA".
• W.J. Riley, "TDEV and MTIE Measurements Using the BI220 TIA". 
• W.J. Riley, "Frequency Stability Measurements Using a Tight Phase Lock Loop".
• D.B Sullivan, D.W Allan, D.A. Howe and F.L.Walls (Editors),"Characterization of Clocks and Oscillators", NIST Technical Note 1337, U.S. Department of Commerce, National Institute of Standards and Technology, March 1990.
• C.A Greenhall, D.A. Howe and D.B. Percival, "Total Variance, an Estimator of Long-Term Frequency Stability".
• D. Howe, et al., "A Total Estimator of the Hadamard Function Used For GPS Operations".
• C.A Greenhall and W.J. Riley, "Uncertainty of Stability Variances Based on Finite Differences" and Accompanying Software: EDF Program, Help File, Source Code.
• W.J. Riley and C.A. Greenhall, "Power Law Noise Identification Using the Lag 1 Autocorrelation".
• D.W. Allan, N. Ashby and C.C. Hodge, "The Science of Timekeeping", Hewlett-Packard Company Application Note 1289.
• J.R. Vig, "Quartz Crystal Resonators and Oscillators For Frequency Control and Timing Applications - A Tutorial".
• J.A. DeYoung, "Discrete Simulated Power Law Data in the Time-Domain Using the Kasdin and Walter (1992) Method".  An animated example of simulated power law data using the same method employed in Stable32.
• An excerpt from NBS Monograph 140 containing the classic Annex 8.E example for the calculation of the Allan variance.

Data

• NBS Data The classic set of nine 3-digit numbers from Annex 8.E of NBS Monograph 140
• Test Suite Data A test suite of 1000 pseudo-random frequency data points

Software and Documentation

• Stable32 User Manual

A printed version of the Stable32 User Manual is available for purchase.

• Stable32 User Manual (Book)

• MJD/DOY Calendar

Links

• BIPM Bureau International des Poids et Mesures
• BNM-LPTF Paris Observatory (France)
• EFTF European Frequency and Time Forum
• GPS Global Positioning System Operations (USNO)
• IEEE Institute of Electrical and Electronic Engineers
• IEN Istituto Elettrotecnico Nazionale Galileo Ferraris (Italy)
• IERS International Earth Rotation Service
• ION Institute of Navigation
• JPL Jet Propulsion Laboratory
• MJD Get current Modified Julian Date fron USNO
• NIST National Institute of Standards and Technology
• NGA National Geospatial-Intelligence Agancy (Formerly NIMA)
• NPL National Physical Laboratory (UK)
• NRC National Research Council (Canada)
• NRL Naval Research Laboratory
• Official U.S. Time
• PTB Physikalisch-Technische Bundesanstalt (Germany)
• PTTI Precise Time and Time Interval Applications and Planning Meeting
• SP Swedish National Testing and Research Institute
• UFFC Ultrasonics, Ferroelectrics and Frequency Control Society (IEEE)
• USCG U.S. Coast Guard Navigation Center
• USNO U.S. Naval Observatory Time Service Department
• UTC Offsets and Step Adjustments of UTC

Contact Information

	Proprietor:	William J. Riley
	Telephone: Fax:	843-525-6495 843-525-0251
	Address:	650 Distant Island Drive  Beaufort, SC 29907  USA	Click on E-Mail address to compose an e-mail message to
	E-Mail:	bill@wriley.com	Hamilton Technical Services

Copyright 1997-2012 Hamilton Technical Services
Last revised: 04/05/12