QC2d-4 Statistics control Accumulation Method

Description of Method

The monthly accumulated precipitation RRM is calculated. The corresponding normal monthly accumulated precipitation RRM' is retrieved form the climate data base.

Corresponding accumulated value at three neighbour stations are RRMn1, RRMn2, RRMn3. Corresponding reference accumulated value at three neighbour stations are RRMn'1, RRMn'2, RRMn'3.

An error is detected when

| RRM - RRM' | > tol1

and at least two of the three following inequalities are satisfied

| RRMn1 - RRMn'1 | < tol1

| RRMn2 - RRMn'2 | < tol1

| RRMn3 - RRMn'3 | < tol1

where tol1 is a tolerance value.

Quality Control Level

QC2d-4

Run Parameters

It shall be possible to run the algorithm for

RR_1

RR_6

RR_12

RR_24

Characteristics of the data to which the method is applied

CONTROLINFO AND/OR USEINFO

none

TYPEID, PARAMIDS, 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 on no error detection

fstat = 2 on error detection

EXPECTIONS OF THE USEINFO FLAGS CORRESPONDING TO CONTROLINFO FLAG SETTINGS

fstat = 2 -> controlinfo(2) = 2

Dependencies

Definition of neighbour station

Definition of regions and related region reference station

Extracts from KDVH