ECSS-Q-ST-70-09C, SPACE PRODUCT ASSURANCE: MEASUREMENTS OF THERMO-OPTICAL PROPERTIES OF THERMAL CONTROL MATERIALS (31-JUL-2008)

ECSS-Q-ST-70-09C, SPACE PRODUCT ASSURANCE: MEASUREMENTS OF THERMO-OPTICAL PROPERTIES OF THERMAL CONTROL MATERIALS (31-JUL-2008)., The thermo‐optical properties of materials are of importance to enable the calculation of the thermal housekeeping and radiative heat transfer. This Standard describes the methodology, instruments, equipment and samples, used to calculate the thermo‐optical properties of thermal‐control materials, i.e. solar absorptance [αs or αp] and the infrared emittance [εh or εn]. In general this procedure has been written in connection with instruments and equipment available at ONERA, INTESPACE and ESTEC; however, any supplier is encouraged to built up his own instrument or equipment provided the accuracy of the results is equivalent to the one specified herein. In this Standard, the supplier is identified as the entity that performs the test.