BS ISO 19923:2017,Space environment (natural and artificial) — Plasma environments for generation of worst case electrical potential differences for spacecraft.
ISO 19923:2017 specifies space plasma environments that lead to the generation of the worst-case surface potential differences for spacecraft. It also specifies how to estimate worst-case potential differences by using the simulation codes provided.
5 Criteria for worst-case environment
The worst-case environment shall be defined as the space environment measured in space that causes the maximum potential difference between the spacecraft electrical grounding body and external non-conductive surfaces or isolated conductive surfaces. Worst-case conditions shall be realistic.
6 Procedures for application to spacecraft design Spacecraft charging simulation should be carried out at an early stage of spacecraft design. Ideally, this should be before selecting the materials for those spacecraft surfaces that will be exposed to the space environment.
7.2 PEO and MEO worst-case environments
The worst-case plasma environment in PEO and MEO will be updated as more published measured
environments become available. See Reference [3] for one published PEO environment.