Measured surface temperatures of the Hayabusa capsule during re-entry determined from ground observation |
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| Institution: | 1. Institut für Raumfahrtsysteme, Stuttgart, Germany;2. Kayser-Threde, München, Germany;3. Institut für Raumfahrtsysteme, Stuttgart, Germany;1. Dipartimento di Fisica e Astronomia, Università di Bologna, viale Berti-Pichat 6/2, 40127 Bologna, Italy;2. Istituto Nazionale di Ottica - CNR, largo E. Fermi 6, 50125 Firenze, Italy;3. Scuola di Ingegneria, Università degli Studi della Basilicata, Viale dell׳Ateneo Lucano 10, 85100 Potenza, Italy;4. Space Science and Engineering Center, University of Wisconsin-Madison, 1225 W. Dayton St., Madison, WI 53706, USA;1. University of Antwerp, Op3Mech, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;2. University of Antwerp, Laboratory of Biomedical Physics, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;3. Vrije Universiteit Brussel, Acoustics & Vibration Research Group, Pleinlaan 2, B-1050 Brussels, Belgium |
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| Abstract: | The Hayabusa sample return capsule, which contained asteroid samples, re-entered the Earth's atmosphere on June 13, 2010. An ablative carbon-phenolic thermal protection system (TPS) was used to enable a safe return for the small capsule and the containing samples. Besides a research aircraft operated by NASA with a wide range of imaging and spectrographic cameras for remote sensing of the radiation of the Hayabusa capsule during its entry flight, observation from ground based stations has been realized. We participated in the ground based observation campaign with two instruments for spectroscopic and photometric measurements aiming to detect the surface temperature and the plasma radiation in front of the re-entering capsule. The system consists in an infrared camera and a wide range miniature fibre spectrometer. The paper presents the setup, the laboratory calibration procedure, and correction for transmission. The surface temperature of the capsule reached a peak of 3250 K when the capsule was at an altitude of 55.95 km. The thermographic camera measures independently slightly higher temperature at peak heating (3308 K). |
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