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Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system

Gunderson, Kurt and Chen, C. M. Hubert and Christensen, Finn and Craig, William and Decker, Todd and Hailey, Charles and Harrison, Fiona and McLean, Ryan and Wurtz, Ron and Ziock, Klaus (2004) Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system. In: X-Ray and Gamma-Ray Instrumentation for Astronomy XIII. Proceedings of SPIE. No.5165. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, pp. 158-168. ISBN 9780819450388.

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The High Energy Focusing Telescope (HEFT) is a balloon-borne, hard x-ray/gamma ray (20-70 keV) astronomical experiment. HEFT's 10 arcminute field of view and 1 arcminute angular resolution place challenging demands on its attitude control system (ACS). A microprocessor-based ACS has been developed to manage target acquisition and sidereal tracking. The ACS consists of a variety of sensors and actuators, with provisions for 2-way ground communication, all controlled by an on-board computer. Ground based pointing performance measurements indicate 1σ jitter of 7" and gyro drift rates of <1" s^(-1). Jitter is expected to worsen in the flight environment, but star tracker data are expected to reduce drift rates significantly, enabling a predicted 1σ absolute attitude determination of ≥4.7". HEFT is scheduled for flight in Spring 2004.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Christensen, Finn0000-0001-5679-1946
Harrison, Fiona0000-0003-2992-8024
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). Mechanical construction of the instrument was supported by R. Hill and D. Carr of LLNL. The electronics were designed by D. Deane of LLNL. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-48.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Department of Energy (DOE)W-7405-ENG-48
Subject Keywords:Balloons, attitude control systems, X-rays
Series Name:Proceedings of SPIE
Issue or Number:5165
Record Number:CaltechAUTHORS:20180109-153135465
Persistent URL:
Official Citation:Kurt S. Gunderson, C. M. Hubert Chen, Finn Erland Christensen, William W. Craig, Todd A. Decker, Charles James Hailey, Fiona A. Harrison, Ryan McLean, Ronald E. Wurtz, Klaus Ziock, "Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system", Proc. SPIE 5165, X-Ray and Gamma-Ray Instrumentation for Astronomy XIII, (3 February 2004); doi: 10.1117/12.513439;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84205
Deposited By: George Porter
Deposited On:09 Jan 2018 23:53
Last Modified:15 Nov 2021 20:17

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