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Total Vertical Uncertainty (TVU) is the uncertainty of the reduced depths.
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To determine the vertical uncertainty the sources of individual uncertainty need to be quantified. All uncertainties then combined to obtain a total vertical uncertainty (TVU). Factors affecting the vertical uncertainty:
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Total Horizontal and Vertical uncertainty are provided at the 95% confidence level.
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Total Horizontal Uncertainty
Total Vertical Uncertainty (via QAX - Quality Assurance Tool)
Tide
Total Propagated Uncertainty
Pass Requirements
1. TVU: Run the 32-bit Geotiff Total Vertical Uncertainty layer through QAX and ensure that the 95% confidence level (order2) has been met for the dataset.
2. THU: Testing currently unavailable
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For the time being there is no tool in Geoscience Australia to test the THU confidence level. During acquisition, ensure that the maximum allowable Total Horizontal Uncertainty was 95% confidence level (order 2) in the mobilization report (only for mountable sensors, we usually don’t receive mobilization reports for the permanent mounted sensors). |
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3. Tide: Ensure that the GPS tide or conventional tide (for generic surveys) has been applied to the data or submitted with the dataset.
4. Combined Uncertainty Bathymetry Estimator (CUBE): Make sure the uncertainty of contributing sensors follows appendix E of the Australian multibeam guidelines.
Examples
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Description 2000001S Austrea2 (GA-0223) Test results 
Pass Yes Explanation This dataset meets the requirements outlined above and passes checks 1, 3 and 4. Total Vertical Uncertainty check test (TVU) with 100% confidence (which is even higher then maximum 95% confidence). |
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