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Chapter 2. Observations: Types, variables and error statistics
Chapter 3. CMA creation (MAKEMA)
Chapter 4. The FEEBACK task
Chapter 5. The TOOLS task
Chapter 6. Central-memory array (CMA) structure/format
Chapter 7. BUFR feedback data structure/format
Chapter 8. SIMULATED-observations data structure/format
Chapter 9. NAMELISTS
Chapter 10. Processing of scatterometer data
REFERENCES
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5.1 Basic principles
The main purpose of this task is to perform various observation-processing-related diagnostics/debugging activities outside the data-assimilation cycle. By having it as a part of the OBSPROC, one makes use of the existing code structures already developed for two main tasks, the MAKECMA and the FEEDBACK.
There are three types of activities (sub-tasks) within the TOOLS task. These sub-tasks are:
| • CMA tools; |
| • BUFR tools; and |
| • SIMULATED-observations tools. |
As their names imply they are related to the specific data structures.
The TOOLS task, as with the other two, is invoked by starting the OBSPROC, via program AAOBPPRO. The subroutine CNTOBSPR is called next which in turn, after finding out that the TOOLS task is to be carried out, branches itself and calls the TOOLS subroutine (see Fig. 1.2 and Fig. 1.3 of Chapter 1 `Non-IFS observation processing (OBSPROC): General overview' ).
Once in the TOOLS subroutine (see Fig. 5.1 ) a partial pre-set is carried out first. This pre-set includes setting up the definitions of:
| • numerical limits (SULIM), |
| • variables' numbers (SUVNMB), |
| • level/layers structure (SULEVLAY), |
| • CMA observation and code types (SUCMOCTP), |
| • BUFR observation types and subtypes (SUBUOCTP), |
| • observation events (SUEVENTS), |
| • observation flags (SUFLTXT), |
| • various observation processing codes (SUCODES), |
| • BUFR data structure and format (SETBUFR), |
| • SIMULATED observation structure and format (SUSIM), |
| • CMA data structure and format (SUCMA), |
The next step is to print the chosen run set-up by calling PREAMB subroutine. Then, depending on the status of the NAMDIA namelist switches LCMATOOL, LBUFTOOL and LSIMTOOL, it will branch itself off to an appropriate section and start the sub-task. The CMA tool sub-task is invoked if LCMATOOL=.T., whereas the BUFR tool and the SIMULATED-observations tool are started if LBUFTOOL=.T. or LSIMTOOL=.T..
Before either of these two routines is called, the CMA file is initialized (INICMAIO) and the CMA DDRs read. As the read-in DDRs are reals at this stage, their integer and character sections are worked out by calling the CONRCD2I and CONRCD2C subroutines, respectively. Furthermore, at this stage, if the NAMDIA namelist switches LOPRCMD=.T., the CMA DDRs will be printed out (PRTDDR). The NAMDIA namelist switches the LOPRCMA and LCONVER control if either the IRETCMA or ICONVERG subroutine is called next. IRETCMA is the master subroutine for printing the CMA reports, whereas ICONVERG is the master routine for the convergence test. After returning from either of these two routines, some diagnostic print takes place by calling either the CMASTA or CONVSTA subroutine. The last step is to close the input CMA file (FINCMAIO).
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16.04.2002 |
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