The Hydrogen Maser Clock (HMC) project was originally conceived to fly on a reflight of the European Space Agency (ESA) free flying platform, the European Recoverable Carrier (EURECA) that had been launched into space and recovered by NASA's Space Transportation System (STS). A Phase B study for operation of HMC as one of the twelve EURECA payload components was begun in July 1991, and completed a year later. Phase C/D of HMC began in August 1992 and continued into early 1995. At that time ESA decided not to refly EURECA, leaving HMC without access to space. Approximately 80% of the flight support electronics are presently operating the HMC's physics package in a vacuum tank at the Smithsonian Astrophysical Observatory, and are now considered to be well-tested flight electronics. The package will continue to be operated until the end of 1997 or until a flight opportunity becomes avaiable. Appendices: letters and trip report; proceedings of the symposium on frequency standards and metrology; milli-celsius-stability thermal control for an orbiting frequency standard.


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    Titel :

    Hydrogen Maser Clock (HMC) Experiment


    Beteiligte:

    Erscheinungsdatum :

    1997-06-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Hydrogen Maser Clock (HMC) Experiment

    R. F. C. Vessot / E. M. Mattison | NTIS | 1997


    The cronos hydrogen maser clock redshift experiment on Radioastron

    Busca, G. / Bernier, L.G. / Schweda, H. et al. | Elsevier | 2003



    The CRONOS Hydrogen Maser Clock Redshift Experiment on Radioastron

    Busca, G. / Bernier, L. G. / Schweda, H. et al. | British Library Conference Proceedings | 2003


    The Maser Experiment

    Johnson, C. C. | NTRS | 1967