A stellar inertial attitude reference with strapdown rate integrating gyros, together with star trackers and a general purpose computer, constitute the attitude control subsystem shared by NASA's HEAO observatories. HEAO-2, which is equipped with the largest and most precise grazing incidence X-ray mirror deployed aboard a satellite to date, has achieved accurate telescope pointing in autonomous maneuvering to selected targets, the acquisition of guide stars for attitude updating, and the positioning of unique experiments at the telescope focal point. Performance data have confirmed maneuvering accuracies of 1 arcmin, and pointing accuracies of 2-5 arcsec. Additional performance results presented support the extrapolation of the present HEAO attitude reference design to future applications.


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    Title :

    HEAO project - Revisited


    Contributors:

    Conference:

    Control science and technology for the progress of society; Eighth Triennial World Congress ; 1981 ; Kyoto, Japan


    Publication date :

    1982-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Heao Science Symposium

    C. Dailey / W. Johnson | NTIS | 1979


    HEAO-C Observatory Description

    Dailey, C. / Parnell, T. A. | NTRS | 1979


    HEAO attitude reference design

    Hoffman, D. P. / Mcelroy, T. T. | NTRS | 1978


    HEAO-A Observatory Description

    C. Dailey / T. A. Parnell | NTIS | 1977


    HEAO-1 mission evaluation

    Giordano, F. V. / Brenes, U. R. / Breshears, B. J. | NTRS | 1979