GONG Hα Instrument
GONG Hα Instrument
GONG Hα Instrument
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Camera Smear•Caused by lightleaking into coveredchannels and readoutbiasing•Amplitude ~ 0.3 %(range here 0 – 30ADU)•Only significant forprominence studies•Easily corrected bysubtraction of columnmeansSeptember 22, 2009 <strong>GONG</strong> H-alpha Review 35