OPERATIONAL DATA ASSIMILATION
The Global Data Assimilation (GDAS) is an important component of the Analysis/Forecast system which basically provides the initial condition to the numerical weather prediction model. The GDAS of NCMRWF is a 6-hourly intermittent (00UTC, 06UTC, 12UTC and 18UTC) scheme and consists of ( i) Data Reception, Data Decoding, Data Quality Control, Data Analysis based on SPECTRAL STATISTICAL INTERPOLATION (SSI) and (iii) the Global Weather Forecast Model. The Model provides the first Guess to the Analysis scheme.
[Flow Diagram of the NCMRWF GDAS is here]
Reception
of Observed Data at NCMRWF
Operational
Quality Control of Data