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Proceedings Paper • Open Access

Development of a low cost space telescope for Earth remote sensing from a 12U CubeSat
Author(s): Helcio Vieira Jr.; Manoel N. D. Barcelos Jr.

Paper Abstract

The purpose of this work is to develop a low-cost space telescope for Earth remote sensing that could be housed in a 12U CubeSat with a GSD of 25 meters at LWIR. It will be used the Three Mirror Anastigmatic concept and Commercial Off- The-Shelf components whenever it is possible.

The telescope main mission is the oil spill detection, mainly in ocean environment. Beyond the obvious functionality of this main mission, the oil spill detection can be very useful to detect crashed aircrafts in the ocean.

As secondary missions, this telescope can be used to map deforestation, finding lost ships in the ocean and help the drug smuggling by finding camouflaged man-made objects.

The Project current stage consists in preliminaries optical and mechanical projects in which the mirrors follow ITAR regulation.

The telescope will operate in LWIR frequencies and will extract polarization information from the target.

The preliminary optical project indicates that the telescope optical performance has Modulation Transfer Function greater than 45% at Nyquist frequency, native GSD of 25 meters and that the telescope is diffraction limited (wavefront error of 0.012 wavelengths and Strehl ratio of 99.38%).

The preliminary mechanical project indicates that the maximum deflection caused by gravity induces to a despicable error (smaller than one over one hundred and forty) when compared to the mean wavelength of operation.

The preliminary radiometric analyses indicates that the telescope has a NETD of 0.90 K.

Paper Details

Date Published: 12 July 2019
PDF: 11 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111800Q (12 July 2019); doi: 10.1117/12.2535945
Show Author Affiliations
Helcio Vieira Jr., Univ. of Brasilia (Brazil)
Manoel N. D. Barcelos Jr., Univ. of Bralisia (Brazil)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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