Topical Issue - Space Weather Instrumentation
Open Access
Technical Article

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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