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kvalobs:kvoss:system:qc2:requirements:algorithms:diptest03 [2011-11-28 09:52:37]
alexanderb Change title
kvalobs:kvoss:system:qc2:requirements:algorithms:diptest03 [2022-05-31 09:29:32] (current)
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-====== Dip test - QC2d-1 ======+====== QC2d-1: Dip test ======
  
-{{:kvoss:system:qc2:requirements:algorithms:dip.png|}}+{{kvalobs:kvoss:system:qc2:requirements:algorithms:dip.png|}}
  
    * fs=2 for A(t),     * fs=2 for A(t), 
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    * fs=1 for A(t-2)     * fs=1 for A(t-2) 
  
-A dip is detected if |A(t)-A(t-2)| < |A(t-1)-A(t-2)| and |A(t)-A(t-2)| < delta +A dip is detected if <m>|A(t)-A(t-2)| < |A(t-1)-A(t-2)|</m> and <m>|A(t)-A(t-2)| < delta</m> 
-where delta is specified in the algorithm configuration. +where <m>delta</m> is specified in the algorithm configuration. 
-A(t-1) then receives a corrected value by interpolation.+<m>A(t-1)</m> then receives a corrected value by interpolation.
  
 The neighboring points at t-2 and t may not have missing original values and have The neighboring points at t-2 and t may not have missing original values and have
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    δ(UU) = 30%  versus the Kvalobs step(UU) = 30%    δ(UU) = 30%  versus the Kvalobs step(UU) = 30%
    δ(FF) = 30 m/s versus the Kvalobs step(FF) = 10 or 12.5 m/s    δ(FF) = 30 m/s versus the Kvalobs step(FF) = 10 or 12.5 m/s
-   δ(TA) = 10.5 °C versus the Kvalobs step(TA) = 7,5 °C+   δ(TA) = 10.5 °C versus the Kvalobs step(TA) = 7.5 °C
  
-For wind and temperature the Kvalobs dip test will flag more often than by Øgland's formula. For humidity will Øgland's formula gives error flags without corresponding flag from the Kvalobs dip test. This occurs in a "skew" dip when the step test criterion is met in one of the two cases.+For wind and temperature the Kvalobs dip test will flag more often than Øgland's formula. For humidity Øgland's formula will flag for errors without corresponding flag from the Kvalobs dip test. This occurs in a "skew" dip when the step test criterion is met in one of the two cases.
  
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