
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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