Session 8 - Space Systems Development and Operations: Dealing with Space Weather and Space Climate Effects

Eamonn Daly (European Space Agency), Dave Pitchford (SES), Hugh Evans (ESA)
Wednesd 16/11, 10:00-13:00

Spacecraft have to survive in hostile environments that can induce a variety of radiation and plasma effects. Those effects will be the focus of this session. They will be discussed in the context of both space weather (transient phenomena) and “space climate”, which we define as quasi-permanent or slowly evolving environmental features such as cosmic rays, the proton radiation belt, the geomagnetic main field, etc.. Although space weather effects are important, there is an important complementary group of effects that are attributable to space climate. In the development of space systems, including elements such as manned and unmanned spacecraft, launchers, transfer vehicles and constellations, considerable engineering effort is devoted to ensuring the correct functioning in the presence of the space environment. The engineering effort includes processes such as radiation hardness assurance and electromagnetic compatibility analysis, which include evaluations of environmental interactions(*). The session will compare space weather effects with other radiation and plasma hazards and discuss in detail the means which are deployed to address them. The objective is to put space weather phenomena into context when evaluated alongside “space climate” effects. Presentations and discussions will include end-to-end analyses and so expose the space weather community to end-user concerns, the use of standards, equipment testing, system design, engineering margins, return-on-experience and other practical issues.

(*) Issues evaluated for radiation hardness include total ionizing and non-ionizing doses, and single event effect (SEE) rates. Ionizing dose is usually a concern for mission lifetime and so long-term average models of the radiation belt environment are used, augmented by statistical models of solar particle event (SPE) risks. In most near-earth missions, the dose from SPEs is relatively small compared to radiation belt doses. For single event effects the principal environments of concern are galactic cosmic rays and the inner, proton, radiation belt. The solar particle ion environment is also considered, since high rates during SPEs may disrupt systems more severely, for example in star trackers. Most SPEs have energy spectra and compositions that do not pose much of a problem. More troublesome are the problems from energetic protons in the inner radiation belt that induce SEEs through nuclear interactions. This is a relatively stable environment so can be thought of as climatological, responding to slow changes in the geomagnetic main field and the changes in the cosmic ray albedo neutron source.

Poster Viewing
Wednesday November 16, 11:00 - 11:00, Poster Area

Wednesday November 16, 11:00 - 13:00, Mercator

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Talks : Time schedule

Wednesday November 16, 11:00 - 13:00, Mercator
11:00Space Radiation and Plasma Effects on Spacecraft: Coping with Weather and ClimateDaly, E et al.Oral
11:17Space Radiation Environment and Situational Awareness (SSREA) MonitorsBlake, B et al.Oral
11:34Space Environment Effects on ESA Science MissionsProd'homme, T et al.Oral
11:51Space radiation crew protection and operations for exploration missionsGaza, R et al.Oral
12:08Single Event Effects Considerations for Spacecraft DesignLikar, J et al.Oral
12:25Spacecraft charging related to low energy plasma environment at GEO and MEOMateo-velez, J et al.Oral
12:42Atomic Oxygen modelling and its impact on LEO spacecrafts designZitouni, B et al.Oral


Wednesday November 16, 11:00 - 11:00, Poster Area
1New capabilities of SPENVIS Next Generation and their benefits for spacecraft designers and operators Messios, N et al.p-Poster
2The electrostatic cleanliness programme to cope with spacecraft charging on Solar Orbiter missionHilgers, A et al.p-Poster
3Solar particle events and evaluation of their effects during spacecraft designJiggens, P et al.p-Poster
4Radiation belt environment and effects evaluation during designEvans, H et al.p-Poster