11.0 Wavefront Control Subsystem Data Dictionary

11.4 Down tip-tilt dataflows


APD counts = 4 element vector of photon counts

DTT control block = DTT_loop_command +

DTT_loop_status

DTT_background_vec +

APD_int_time +

WFS_int_time +

DTT_offset_vector +

DTT_loop_gain +

DTT_comp_weights +

DTT_soft_limits +

DTT_open_position

diag_trigger_flag +

filtWheelMode +

filtWheelPosition +

DTT_heartbeat +

CP_heartbeat

DTT diagnostic buffer = shared memory buffer for DTT diagnostic data

DTT loop state = idle | open | closed_wfs | closed_apd | reg_test | error

DTT status = current TTM position

DTTM vector = 2 element vector of tip-tilt scaled for D/A converters

WFS tip-tilt = two-component vector from wavefront reconstructor sent via VME shared memory to WFC tip-tilt controller


AO Software Design Book - 25 FEB 1997

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