Operating and environmental characteristics of Sigma Tau hydrogen masers used in the Very Long Baseline Array (VLBA)

Details Operating and environmental characteristics of Sigma Tau hydrogen masers used in the Very Long Baseline Array (VLBA) Operating and environmental characteristics of Sigma Tau hydrogen masers used in the Very Long Baseline Array (VLBA)

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989tdar.nasa...72t&link_type=abstract

In its The Telecommunications and Data Acquisition Report p 72-80 (SEE N89-27871 22-32)

Computer Science

Performance

Environmental Tests, Frequency Standards, Hydrogen Masers, Performance Tests, Very Long Base Interferometry, Arrays, Atmospheric Pressure, Humidity, Magnetic Fields, Temperature Dependence

Scientific paper

Presented here are the results obtained from performance evaluation of a pair of Sigma Tau Standards Corporation Model VLBA-112 active hydrogen maser frequency standards. These masers were manufactured for the National Radio Astronomy Observatory (NRAO) for use on the Very Long Baseline Array (VLBA) project and were furnished to the Jet Propulsion Laboratory (JPL) for the purpose of these tests. Tests on the two masers were performed in the JPL Frequency Standards Laboratory (FSL) and included the characterization of output frequency stability versus environmental factors such as temperature, humidity, magnetic field, and barometric pressure. The performance tests also included the determination of phase noise and Allan variance using both FSL and Sigma Tau masers as references. All tests were conducted under controlled laboratory conditions, with only the desired environmental and operational parameters varied to determine sensitivity to external environment.

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