Open Access
Table 1.
Summary of the most important electro-magnetic perturbations impacting RPW and characterized so far.
| Label | Description | Corrupted | Sensor | Root | Impacted | Severity and |
|---|---|---|---|---|---|---|
| frequencies | E/B | cause | sub-systems | mitigations | ||
| 1 | Continuous emission | ∼1.3 Hz | B | Unknown | SCM, LFR | TBD |
| 2 | Pulse of the Attitude and Orbit Control System (AOCS) synchronization | 8 and 16 Hz | B | S/C AOCS | LFR | Low severity |
| 3 | SCM heater | ≤100 Hz | B | SCM | LFR | Low severity, flagging the data |
| 4 | 36 Hz and harmonics | ≤200 Hz | E | Unknown | LFR | Medium severity |
| 5 | 3 h periodicity perturbation in LF | ≤500 Hz | B | Unknown | LFR | TBD |
| 6 | EUI science mode | Broadband up to 1.5 kHz | E and B | EUI | LFR | Medium severity, should be taken care of during operations |
| 7 | Solo-HI 6.3 kHz | ∼6.3 kHz | E and B | Solo-HI | LFR | Medium severity, should be taken care of during operations |
| 8 | ∼50 kHz | From ∼30 to ∼60 kHz | E | Unknown | TNR-HFR and TDS | High severity |
| 9 | 80 kHz | ∼80 kHz and harmonics | E | S/C reaction wheels electronics | TNR-HFR | High severity, mitigation by RPW team |
| 10 | 120 kHz | ∼120 kHz and harmonics | E and B | S/C PCDU noise radiated by SA | TNR-HFR and TDS | High severity, mitigation by RPW team |
| 11 | ∼250 kHz | 244.6, 255.5 kHz | B | MAG heater | TNR | Low severity, mitigation by flagging the data |
| 12 | ∼300 kHz | Several frequencies around 300 kHz | E | S/C battery charging | TNR | High severity if not mitigated by ESA during operations |
Notes. Their root causes are still under investigation. All the information and updates about the RPW EM contamination can be found online (https://rpw.lesia.obspm.fr/Engineering).
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