Thermal Analysis of SUSI-O on SUNRISE III

Date

2020-07-31

Journal Title

Journal ISSN

Volume Title

Publisher

2020 International Conference on Environmental Systems

Abstract

Sunrise UV Spectro-Polarimeter and Imager Optics Unit (SUSI-O) is a solar optical spectropolarimeter designed to explore the 300-430 nm band, which is poorly accessible from the ground. With that purpose, SUSI-O will be included in the third flight of the balloon-borne SUNRISE observatory. SUNRISE observatory is designed to operate in the stratosphere (around 37 km), where, from the thermal point of view, the environmental conditions are very close to the ones found at space although some particularities have to be taken into account. To fulfill the scientific requirements, the Thermal Control System (TCS) of the instrument plays an important role. The paper presents an overview of the SUSI-O thermal design and the analyses carried out in order to verify thermal requirements and guarantee thermal stability during the scientific observations. For the float operational phase, two steady-state cases (Hot and Cold) have been considered whereas a transient analysis might be needed for the ascent phase. The thermal hardware necessary to verify thermal requirements during the ascent and float phases is presented. It includes both, active and passive elements, including heaters, and radiators, single layer insulation (SLI) blankets, Styrofoam insulation, thermal straps and thermal tapes, respectively.

Description

Alejandro Fernandez-Soler, IDR/UPM, Spain
Fernandez-Rico, Max Planck Institute for Solar System, Germany
Alex Feller, Max Planck Institute for Solar System, Germany
Ignacio Torralbo-Gimeno, IDR/UPM, Spain
Isabel Perez-Grande, IDR/UPM, Spain
ICES109: Thermal Control of High Altitude Balloon Systems
The proceedings for the 2020 International Conference on Environmental Systems were published from July 31, 2020. The technical papers were not presented in person due to the inability to hold the event as scheduled in Lisbon, Portugal because of the COVID-19 global pandemic.

Keywords

SUSI-O, SUNRISE III, thermal design, thermal analysis, stratospheric balloon

Citation