Reducing The Random Errors In Adcp Measurements - Kongsberg EK80 Reference Manual

Kongsberg EK80 Reference Manual
Related topics
Setting up the ADCP presentation, page 227
ADCP Colour Span function, page 591

Reducing the random errors in ADCP measurements

There will always be random noise in water velocity estimates. The random noise can be
reduced by using the averaging the velocity estimates over a fixed number of pings. Use this
function to reduce the random noise by using the
Context
The average values are determined using a selected number of pings and the sliding average
principle. Use the
Ping Average
averaging operation reduces the ensemble noise of a a factor of approximately √N, where N
is number of averaged pings. Ping average represents the number of pings used to create
these subsets of pings used to calculate the moving average.
Note
For scientific operations, select the
Procedure
1 Click inside one of the ADCP views.
Note
The changes you make are by default applied to all views in the current ADCP
presentation.
2 Open the
Active
3 Select a
Ping Average
To change the setting, move the cursor to either side of the button. Select the left side
of the button to decrease the value. Select the right side of the button to increase
the value. Select the middle of the button to open it. You can choose any of the
predetermined options in the list.
Related topics
Setting up the ADCP presentation, page 227
Ping Average function, page 593
234
function to specify how many pings you want to use. The
Ping Average
menu.
setting that fits you requirements.
function.
Ping Average
value according to survey requirements.
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