The gravity probe B relativity mission uses a fused-quartz optical star tracking telescope as the sensor for the control system which points the spacecraft towards its guide star. The telescope is cooled to <5 K while the readout which uses photodiodes and JFET preamps operates at 72 K. It is mounted on the front end of the telescope with a thermal standoff. Analysis indicates that the telescope is capable of providing sub-milli-arc-second (marcs) pointing stability information with an angular pointing noise of < 21 marcs/ square root (Hz) for the guide star IM Pegasi. We describe the design of the telescope and test results under nominal operating conditions. Analysis of the expected performance of the telescope in flight, based on the test results, is also presented.


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    Titel :

    Science telescope for Gravity Probe B


    Beteiligte:
    Wang, Suwen (Autor:in) / Farley, R.P. (Autor:in) / Goebel, J.H. (Autor:in) / Heifetz, M. (Autor:in) / Lipa, J.A. (Autor:in) / Turneaure, J.P. (Autor:in)


    Erscheinungsdatum :

    2003


    Format / Umfang :

    11 Seiten, 13 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    The Gravity Probe-B star-tracking telescope

    Gwo, D.-H. / Wang, S. / Bower, K.A. et al. | Elsevier | 2003


    The Gravity Probe-B star-tracking telescope

    Gwo, D.-H. | Online Contents | 2003


    The Gravity Probe-B Star-Tracking Telescope

    Gwo, D.-H. / Wang, S. / Bower, K. A. et al. | British Library Conference Proceedings | 2003



    Status of the Cryogenic Telescope and Guide Star for Gravity Probe B

    Wang, S. / Gwo, D.-H. / Bower, K. A. et al. | British Library Conference Proceedings | 2000