Mission Design for the CubeSat OUFTI-1

CHAPTER 9.THERMAL-CONTROL SYSTEMWe still do not now the exact temperature limits of our D-STAR payload andtherefore we will make some comments basing on the average limits of theelectronics equipments and battery as thay are usually the most sensible tothermal gradient.We impose therefore that the working temperature has to be between 253 Kand 313 K and the stand-by temperature between 233 K and 333 K.We find out that, on the one hand, the stand-by limits are respected with all thecoating and, on the other hand, the working limits are respected only with theblack and golden coating. Furthermore, the coldest temperature for the blackcoating and the hottest temperature for the gold coating are on the borderline.For this reason, up to now we cannot chose one of this two coating as the modelis too simplified to allow a choice with so small margins. The final decision willbe taken after an accurate study based on orbit and satellite’s configurationwith the more detailed software Esatan and Esarad. Anyway, even if we don’thave a final choice, on the base of these results, we can assume that OUFTI-1will remains within the required temperature limits.Galli Stefania 95 University of Liège