This Technical Memorandum defines the state of the art test methods and related modelling for
evaluating the long term outgassing characteristics of materials.
The methods that are currently used for temporal and temperature variant sources and collectors are
the ESTEC test method, the CNES test method and the ASTM E1559 standard long term outgassing
These allow accurate temporal profiling of the outgassing and in addition, with the aid of
modelling software, in‐orbit predictions of emissions, transport and depositions.