Team title: Surface Charging Effects and the Relevant Space Environment
Team ID: G3-02
- Vania Jordanova (Los Alamos National Laboratory, USA), email@example.com
- Joseph Minow (NASA/MSFC, USA), firstname.lastname@example.org
- Dave Pitchford (SES), Dave.email@example.com
- Natalia Ganushkina (University of Michigan, USA), firstname.lastname@example.org
Keywords: (Aero)space assets functions
Ongoing Team Activities:
The SAMPEX Anomaly List (Provided by Paul O'Brien).
Please note that this is the update to the list on the SAMPEX website (
http://www.srl.caltech.edu/sampex/DataCenter/docs/index.html) titled '
LICA Bad HV times database (Excel format)' close to the bottom of the page.
Paul's Surface Charging Presentation at 2021 SEASONS (Space Environment Applications Systems and Operations for National Security) Conference
Spacecraft charging occurs when charged particles from the surrounding plasma and energetic particle environment stop on the spacecraft, either on the surface (surface charging), on interior parts (internal charging), in dielectrics (internal charging), or in conductors (internal charging). Other items affecting charging include biased solar arrays or plasma emitters. Charging can also occur when photoemission occurs; that is, solar photons cause surfaces to emit photoelectrons. What occurs after that determines whether the charging causes problems or not.
A few eV to 50 keV electrons are considered source for surface charging (Matéo-Vélez et al., 2018) and electrons greater than 100 keV (>100 keV) are responsible for internal charging (the main source is radiation belt electrons). Sometimes it is difficult to differentiate between surface charging and internal charging as the root cause of an anomaly. The transitional energy of surface charging and internal charging is usually considered to be ~50 keV – 100 keV. Ring current, aurora and plasma sheet particles can be potential space environmental sources for surface charging.
1. Finding surface charging events
2. Model performance assessment and improvement
3. space environment model scoreboard that is relevant to surface charging
More systematic assessment of model performance under different conditions
Better near-realtime monitoring and/or forecasting capabilities of surface charging environment
Link to team external website (optional)