Computer Science – Performance
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..405z&link_type=abstract
In ESA, Frequency and Time Forum p 405-408 (SEE N93-24978 09-70)
Computer Science
Performance
Hydrogen Masers, Observation, Research And Development, Technology Utilization, Time Measurement, Very Long Base Interferometry, Automatic Frequency Control, Frequency Stability, Performance Tests, Phase Shift, Tuning
Scientific paper
The developments, performances, and applications of hydrogen masers are summarized. After the success of the first Chinese hydrogen maser, five more hydrogen masers with several improvements to the maser design, but still traditional structures, were made for VLBI (Very Long Base Interferometry) observations and timekeeping. To equip the Chinese VLBI network, a new generation of hydrogen maser, an integrated, rugged and easily transportable maser, was developed successfully. For timekeeping with hydrogen masers, a kind of one maser autotuning system was developed. Meanwhile, the third generation of hydrogen maser, an oscillating compact hydrogen maser which employs a compact cavity design, resulting in significant size and weight reductions compared to a conventional maser, is being developed. This kind of maser is suitable for timekeeping because of its excellent long term stability.
He Ji-Wei
Huang H. Hilda X.
Jiang G. X.
Lin Freeman C.
Lu Ju-Fu
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