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WorkHorse H-ADCP Operation Manual
May
2015
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 129
AX – Examine Compass Calibration
Purpose
Used to verify the compass calibration.
Format
AX
Recommended Setting. Use as needed.
Description
Compass calibration verification is an automated built-in test that measures how well the
compass is calibrated. The procedure measures compass parameters at every 5º of rota-
tion for a full 360º rotation. When it has collected data for all required directions, the H-
ADCP computes and displays the results. Pay particular attention to the Overall Error.
Example
>AX
----------------------------------------------------------------------------
TRDI Compass Error Estimating Algorithm
Press any key to start taking data after the instrument is setup.
Rotate the unit in a plane until all data samples are acquired...
rotate less than 5
°
/sec. Press Q to quit.
N NE E SE S SW W NW N
^ ^ ^ ^ ^
************************************************************************
Accumulating data ...
Calculating compass performance ...
>>> Total error: 1.5
°
<<<
Press D for details or any other key to continue...
HEADING ERROR ESTIMATE FOR THE CURRENT COMPASS CALIBRATION:
OVERALL ERROR:
Peak Single Cycle Error (should be < 5
°
):
±
1.55
°
DETAILED ERROR SUMMARY:
Single Cycle Error:
±
1.54
°
Double Cycle Error:
±
0.07
°
Largest Double plus Single Cycle Error:
±
1.61
°
RMS of 3rd Order and Random Error:
±
0.31
°
Orientation: Down
Average Pitch: -19.29
°
Pitch Standard Dev: 0.28
°
Average Roll: -0.59
°
Roll Standard Dev: 0.31
°
Successfully evaluated compass performance for the current compass calibration.
Press any key to continue...