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Table 2
SunCET SNRs for on-disk features and CME loops above the limb. Radiances are from GOES/SUVI 195 Å images of the 2017-09-10 CME (Seaton & Darnel, 2018) and are extrapolated beyond its FOV of 1.7 R⊙. SNR at all heights is above the level that ISO 12232 defines as “excellent”.
| Quiet Sun | Active Region | Flare | 1.05 R⊙ | 1.5 R⊙ | 2 R⊙ | 3 R⊙ | 3.5 R⊙ | 4 R⊙ | |
|---|---|---|---|---|---|---|---|---|---|
| Radiance [W/m2/sr] | 0.1 | 10 | 40 | 0.2 | 1.5 × 10−2 | 3 × 10−3 | 3 × 10−4 | 1 × 10−4 | 3 × 10−5 |
| Effective exposure [s] | 0.025 | 0.025 | 0.025 | 0.025 | 10 | 10 | 10 | 10 | 10 |
| e−/res-element | 1.48 × 104 | 1.48 × 106 | 5.94 × 106 | 2.97 × 104 | 8.9 × 105 | 1.78 × 105 | 1.78 × 104 | 5.94 × 103 | 1.78 × 103 |
| Saturation limit [e−/res-element] | 1.08 × 105 | 1.08 × 105 | 1.08 × 105 | 1.08 × 105 | 1.08 × 106 | 1.08 × 106 | 1.08 × 106 | 1.08 × 106 | 1.08 × 106 |
| SNR | 122 | Saturated | Saturated | 172 | 944 | 422 | 133 | 77 | 42 |
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