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Proceedings Paper

Dynamical performance for science-mode stationkeeping with an external occulter
Author(s): Dan Sirbu; Christian Vad Karsten; N. Jeremy Kasdin
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Paper Abstract

An external occulter flown in precise formation with a telescope is being considered for high-contrast direct imaging of exoplanets as a viable mission scenario. In this paper, the dynamics about the Sun-Earth L2 region for an occulter-telescope constellation are considered in conjunction with fourth-body and solar radiation pressure acting as disturbing forces. An optimal observation window is defined in terms of both thrust required and the Sun-constellation geometry. By simulation, the effects of the stellar latitude and distance, the spacecraft separation, the magnitude of the disturbing forces, and on-off versus continuous thrusting are quantified on the thrusting profile needed to maintain precise alignment.

Paper Details

Date Published: 10 August 2010
PDF: 12 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 773152 (10 August 2010); doi: 10.1117/12.856361
Show Author Affiliations
Dan Sirbu, Princeton Univ. (United States)
Christian Vad Karsten, Princeton Univ. (United States)
DTU Space, Technical Univ. of Denmark (Denmark)
N. Jeremy Kasdin, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann Jr.; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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