11.0 Wavefront Control Subsystem Data Dictionary

11.5 Up tip-tilt dataflows

UTT control block = UTT_loop_command +

UTT_loop_status

UTT_background_vec +

WFS_int_time +

UTT_offset_vector +

UTT_loop_gain +

UTT_comp_weights +

UTT_soft_limits +

UTT_open_position +

diag_trigger_flag +

UTT_heartbeat +

CP_heartbeat

UTT diagnostic buffer = shared memory buffer for UTT diagnostic data

UTT loop state = idle | open | closed | reg_test | error

UTT status = current TTM position

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

uplink tip-tilt = two-component vector (tip,tilt) sent from WFC tip-tilt controller laser FSM controller (via VME bus)

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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