CaltechAUTHORS
  A Caltech Library Service

Pointing control for the SPIDER balloon-borne telescope

Shariff, J. A. and Bock, J. J. and Crill, B. P. and Doré, O. P. and Filippini, J. P. and Golwala, S. R. and Hristov, V. V. and Mason, P. V. and Moncelsi, L. and Morford, T. A. and O'Brient, R. and Tucker, R. S. (2014) Pointing control for the SPIDER balloon-borne telescope. In: Ground-based and Airborne Telescopes V. Proceedings of SPIE. No.9145. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 91450U. ISBN 9780819496133. https://resolver.caltech.edu/CaltechAUTHORS:20180702-102441486

[img] PDF - Published Version
See Usage Policy.

4Mb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20180702-102441486

Abstract

We present the technology and control methods developed for the pointing system of the Spider experiment. Spider is a balloon-borne polarimeter designed to detect the imprint of primordial gravitational waves in the polarization of the Cosmic Microwave Background radiation. We describe the two main components of the telescope’s azimuth drive: the reaction wheel and the motorized pivot. A 13 kHz PI control loop runs on a digital signal processor, with feedback from fibre optic rate gyroscopes. This system can control azimuthal speed with < 0.02 deg/s RMS error. To control elevation, Spider uses stepper-motor-driven linear actuators to rotate the cryostat, which houses the optical instruments, relative to the outer frame. With the velocity in each axis controlled in this way, higher-level control loops on the onboard flight computers can implement the pointing and scanning observation modes required for the experiment. We have accomplished the non-trivial task of scanning a 5000 lb payload sinusoidally in azimuth at a peak acceleration of 0.8 deg/s^2, and a peak speed of 6 deg/s. We can do so while reliably achieving sub-arcminute pointing control accuracy.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2055166DOIArticle
ORCID:
AuthorORCID
Bock, J. J.0000-0002-5710-5212
Crill, B. P.0000-0002-4650-8518
Doré, O. P.0000-0002-5009-7563
Filippini, J. P.0000-0001-8217-6832
Golwala, S. R.0000-0002-1098-7174
Mason, P. V.0000-0002-7963-7420
Moncelsi, L.0000-0002-4242-3015
Additional Information:© 2014 Society of Photo-optical Instrumentation Engineers (SPIE). The Spider collaboration gratefully acknowledges the support of NASA (award numbers NNX07AL64G, NNX12AE95G), the Lucille and David Packard Foundation, the Gordon and Betty Moore Foundation, the Natural Sciences and Engineering Research Council (NSERC), the Canadian Space Agency (CSA), and the Canada Foundation for Innovation. We thank the JPL Research and Technology Development Fund for advancing detector focal plane technology. W. C. Jones acknowledges the support of the Alfred P. Sloan Foundation. A.S. Rahlin is partially supported through NASAs NESSF Program (12-ASTRO12R-004). J.D. Soler acknowledges the support of the European Research Council under the European Union’s Seventh Framework Programme FP7/2007-2013/ERC grant agreement number 267934. Logistical support for this project in Antarctica is provided by the U.S. National Science Foundation through the U.S. Antarctic Program. We would also like to thank the Columbia Scientific Balloon Facility (CSBF) staff for their continued outstanding work.
Funders:
Funding AgencyGrant Number
NASANNX07AL64G
NASANNX12AE95G
David and Lucile Packard FoundationUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
JPL Research and Technology Development FundUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
NASA12-ASTRO12R-004
European Research Council (ERC)267934
Subject Keywords:SPIDER, cosmic microwave background, balloon-borne telescopes, control systems, actuation
Series Name:Proceedings of SPIE
Issue or Number:9145
Record Number:CaltechAUTHORS:20180702-102441486
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180702-102441486
Official Citation:J. A. Shariff, P. A. R. Ade, M. Amiri, S. J. Benton, J. J. Bock, J. R. Bond, S. A. Bryan, H. C. Chiang, C. R. Contaldi, B. P. Crill, O. P. Doré, M. Farhang, J. P. Filippini, L. M. Fissel, A. A. Fraisse, A. E. Gambrel, N. N. Gandilo, S. R. Golwala, J. E. Gudmundsson, M. Halpern, M. Hasselfield, G. C. Hilton, W. A. Holmes, V. V. Hristov, K. D. Irwin, W. C. Jones, Z. D. Kermish, C. L. Kuo, C. J. MacTavish, P. V. Mason, K. G. Megerian, L. Moncelsi, T. A. Morford, J. M. Nagy, C. B. Netterfield, R. O'Brient, A. S. Rahlin, C. D. Reintsema, J. E. Ruhl, M. C. Runyan, J. D. Soler, A. Trangsrud, C. E. Tucker, R. S. Tucker, A. D. Turner, A. C. Weber, D. V. Wiebe, E. Y. Young, "Pointing control for the SPIDER balloon-borne telescope", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91450U (22 July 2014); doi: 10.1117/12.2055166; https://doi.org/10.1117/12.2055166
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87514
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 Jul 2018 18:10
Last Modified:10 Dec 2019 21:31

Repository Staff Only: item control page