NASA NTRS · 19690000340
An improved atomic hydrogen frequency and time standard
Abstract
Use of a large bulb, long-multipole magnet, automatic tuner and aluminum cavity provides an improved hydrogen maser which is accurate over long periods of time and suitable for tracking station environments.
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Mc Gunigal, T. E., Peters, H. E.. 1969-09-01. An improved atomic hydrogen frequency and time standard. https://ntrs.nasa.gov/citations/19690000340
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