BS ISO 16378:2013

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Preparatory conditions
6 Solar absorptance (alpha[s]) test methods
7 Hemispherical infrared emittance (varepsilon[h])
   test method
8 Normal infrared emittance (varepsilon[n])
   test methods
9 Test report
10 Quality assurance
11 Audit of measurement equipment
Annex A (normative) - Solar absorptance using
        a spectrophotometer (alpha[s])
Annex B (normative) - Solar absorptance using
        the comparative test method (alpha[p])
Annex C (normative) - Hemispherical infrared
        emittance using the thermal test method
        (varepsilon[h-t])
Annex D (normative) - Normal infrared emittance
        using an IR spectrometer(varepsilon[n-s])
Annex E (normative) - Normal infrared emittance
        using ellipsoid collector optics
        (varepsilon[n-e])
Annex F (normative) - Normal infrared emittance
        using two rotating cavities
        (varepsilon[n-c])
Annex G (informative) - Key parameters for
        measurement
Annex H (informative) - Theoretical directional
        emittance
Bibliography

Describes the multiple measurement methods, instruments, equipment, and samples used to calculate the thermo-optical properties of thermal control materials.

This International Standard specifies the multiple measurement methods, instruments, equipment, and samples used to calculate the thermo-optical properties of thermal control materials. This International Standard compares their features, indicates their limitations and biases, and guides the applications. These measurements will be performed at ground test facilities with the purpose of obtaining material properties. The measured properties will be used for material selection, thermal design of spacecraft, process control, quality control, etc. Also, on-orbit temperature data in the beginning of life can be assessed using the data obtained by ground measurement. Requirements for calibration and reference materials to ensure data quality are also defined. The following test methods are detailed in the Annexes of this International Standard including the configuration of samples and calculations. Solar absorptance using a spectrophotometer: (αs)— AnnexA Solar absorptance using the comparative test method: (αp)— AnnexB Hemispherical infrared emittance using the thermal test method: (εh-t)— AnnexC Normal infrared emittance using an IR spectrometer: (εn-s)— AnnexD Normal infrared emittance using ellipsoid collector optics (εn-e)— AnnexE Normal infrared emittance using two rotating cavities: (εn-c)— AnnexF