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CDIP Quality Control Measures

The tests applied are detemined by data/processing type, as summarized in the table below. Note that CDIP's time series products are for the most part unedited; other than checking for gaps in the data and incorrect times, the times series values are not quality-controlled. It is only when the time series are used for spectral and parameter processing that they are submitted to CDIP's full set of quality control routines.
  • AR = Directional Array of Pressure Sensors
  • BS = Basin Energy Processing, Pressure Sensor
  • DW = Datawell Directional Buoy
  • NB = Non-directional Buoy
  • PR = Single Point Pressure Sensor
  • SG = Surge Processing, Pressure Sensor
  • TIME SERIES VALUES
    TEST: description (click name for more details)ARBSDWNBPRSG
    GAP TEST: edit or discard time series with missing values. 
    DW STATUS/TRANSMISSION BYTE: discard imperfectly received data.     
    MAX WAVE HEIGHT: check wave height against max in archive. 
    FLAT EPISODES TEST: test if time series is changing too slowly.   
    SPIKE EDIT: replace spikes with average of point and previous. 
    MAX/MIN VALUE TEST: for water column, check if values are sensible    
    MEAN SHIFT TEST: check for a shift in the mean in the series. 
    EQUAL PEAKS TEST: check for successive peaks with the same value.   
    ACCELERATION TEST: check if acceleration is greater than 1/3 g  
    MEAN CROSSING TEST: check if there are too few mean crossings.   
    PERIOD DISTRIBUTION TEST: check for excessive long-period waves.   
    UNCORRECTED ENERGY COMPARISON: compare time series variance.     
    DEPTH COMPARISON: compare time series means.     
    SERIES COMPARISON: check correlation of time series.     
    CORRECTED ENERGY COMPARISON: compare depth-corrected variance.     
    SPECTRAL VALUES
    TEST: description (click name for more details)ARBSDWNBPRSG
    INCIDENT WAVE TEST: check that directions are incident to shore.     
    DW STATUS/TRANSMISSION BYTE: discard imperfectly transmitted data.     
    BAND DIRECTION MAX/MIN: check Dmean for each band.     
    DW CHECK FACTORS: issue warning for bad check factors.     
    SUMMARY VALUE MAX/MIN: reject Hs, Tp values outside limits.     
    PARAMETER VALUES
    TEST: description (click name for more details)ARBSDWNBPRSG
    SPIKE TEST: check for abrupt changes in values between records.
    RANGE TEST: apply max/min tests to all parameters.
    CONSECUTIVE VALUE TEST: check for excessively constant values.
    Dp SPREAD TEST: check if Dp values are too spread out.    
    Dp RANDOM TEST: check if Dp values are too variable and random.    
    VISUAL INSPECTION: review monthly Hs, Tp, Dp plots.
    Official UCSD Web Page