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Definition

Standard deviation (std) of O-B values over a defined period 

Calculation

For each observed variable, the std of all valid data is computed for every station. 

Valid data

Data not flagged as missing value (O-B is not NULL) 

Minimum required valid data

Daily: 2 valid values 

Math expression

Screenshot 2023-01-19 at 17.21.19.pngImage Added, where Nj is number of valid data for variable j and the bar denotes the average as defined in Table 3.

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Image Added, where bias and std are the average and standard deviation of O-B departures over a vertical layer (Trop or Stra, in section 2.2)

Definition

rmse of O-B values over a layer

Calculation

For each observed variable, the rmse is computed based on valid data for every station. 

Valid data

Bias and std not NULL. 

Minimum required valid data

2 valid value. 

Math expression

page9image9629952Image Removed

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