GONG Hα Instrument

CCD and Camera Selection• Kodak KAI-4022 interline transfer CCD– 2048 x 2048 7.4μ pixels– 38000 e- FW– Microlenses• DVC(Digital Video Camera Co)-4000AM camera, uncooled– 4.35 fps @ 20 MHz (low noise mode)– 12 bit A/D, 1 ADU = 9 e-– 10 e- RMS camera readout noise– dark clamped for good dark stability– Add 4 exposures to improve dynamic rangeSeptember 22, 2009 GONG H-alpha Review 29