Affiliation:
1. Delft University of Technology, Kluyverweg 1 , 2629HS Delft , The Netherlands
2. Space Instrumentation and ADCS Chair, Space Engineering, Faculty of Aerospace Engineering , Delft University of Technology, Kluyverweg 1 , 2629HS Delft , The Netherlands
Abstract
Abstract
The increase of spatial and temporal resolution for Earth observation (EO) is the ultimate driver for science and societal applications. However, the state-of-the-art EO missions like DigitalGlobe’s Worldview-3, are very costly. Moreover, this system has a high mass of 2800 kg and limited swath width of about 15 km which limits the temporal resolution. In this article, we present the status of the deployable space telescope (DST) project, which has been running for 6 years now at the Delft University of Technology, as a cutting-edge solution to solve this issue. Deployable optics have the potential of revolutionising the field of high resolution EO. By splitting up the primary mirror (M1) of a telescope into deployable segments and placing the secondary mirror (M2) on a deployable boom, the launch volume of a telescope can be reduced by a factor of 4 or more, allowing for much lower launch costs. This allows for larger EO constellations, providing image data with a much better revisit time than existing solutions. The DST specification baseline, based on Wordview-3, aims to provide images with a ground resolution of 25 cm (panchromatic 450–650 nm) from an orbital altitude of 500 km. In this paper, the current status of the optical, thermo-mechanical, and active optics systems design are described. The concurrent design approach combined with a strict bottom-up and top-down compliant systems engineering approach show that the DST is a healthy system concept.
Subject
Instrumentation,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference18 articles.
1. Digital Globe. Worldview 3, Above+Beyond. (2014). Available at: http://worldview3.digitalglobe.com/. (Accessed: 22nd November 2014).
2. D. Dolkens, in ‘A Deployable Telescope for Sub-meter resolution from MicroSatellite Platforms’. (Delft University of Technology, 2015). https://repository.tudelft.nl/islandora/object/uuid%3A8f73b31c-4306-4b44-9937-3b4d23a4a53f?
3. M. Lampton and M. Sholl, in ‘Comparison of On-axis Three-Mirror-Anastigmat Telescopes’. 66870S (2007). DOI:10.1117/12.732527.
4. D. Korsch, Appl. Opt. 2, 2074–2077 (1977).
5. D. Dolkens and H. Kuiper, in ‘Design and End-to-End Modelling of a Deployable Telescope’. International Conference on Space Optics 18, 21–28 (2016).
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