GONG Hα Instrument
GONG Hα Instrument
GONG Hα Instrument
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CCD Camera Requirements 1• Match Nyquist frequency to MTF cutoff– 2048 x 2048 pixels to capture full disk• Fast readout, short exposure– Produce image in under 1 s (control blur)• Large dynamic range– Low dark noise (for disk and prominences)– Large full well (for flares)September 22, 2009 <strong>GONG</strong> H-alpha Review 27
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