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--- kvalobs:kvoss:system:qc2:requirements:algorithms:qc2d-4middelverdi [2010-05-27 12:21:15]
gabrielk created
+++ kvalobs:kvoss:system:qc2:requirements:algorithms:qc2d-4middelverdi [2022-05-31 09:29:32]
@@ Line 1: / Line 1: @@
-====== QC2d-4 Statistics control Mean Value Method ======
-==== Description of Method ====
-The arithmetic mean value of 30 days observations M is calculated.
-Day d is the date 15 days prior to present.
-Daily station specific normal values is extracted from the climate database. The value M' is the normal value of day d.
-Corresponding values at three neighbour stations are Mn1, Mn2, Mn3.
-Corresponding reference normal value at three neighbour stations are Mn'1, Mn'2, Mn'3.
-An error is detected when
-<nowiki>| M - M' | > tol1</nowiki>
-and at least two of the three following inequalities are satisfied
-<nowiki>| Mn1 - Mn'1 | < tol1</nowiki>
-<nowiki>| Mn2 - Mn'2 | < tol1</nowiki>
-<nowiki>| Mn3 - Mn'3 | < tol1</nowiki>
-==== Quality Control Level ====
-  * QC2d-4
-==== Run Parameters ====
-It shall be possible to run the algorithm for
-  * TA
-  * PR
-==== Characteristics of the data to which the method is applied ====
-__CONTROLINFO AND/OR USEINFO__
-  * none
-__TYPEID, OTHER METADATA__
-  * all typeid
-==== Flag Settings ====
-__SPECIFICATION OF CONTROLFLAGS TO BE SET FOR EXPECTED RESULTS OF THE ALGORITHM, I.E. CONSIDER BOTH POSITIVE AND NEGATIVE RESULTS__
-  * fstat=1
-  * fstat=2 on error detection
-__EXPECTIONS OF THE USEINFO FLAGS CORRESPONDING TO CONTROLINFO FLAG SETTINGS__
-  * fstat=2 -> useinfo(2)=2
-==== Dependencies ====
-  * Definition of neighbor stations
-  * Definition of regional reference stations when normal values is unavailable