Layered model structure. Eumetsat AWDP

NWP SAF

layer, see section 4.3.

AWDP User Manual and

Reference Guide

Doc ID : NWPSAF-KN-UD-005

Version : 2.3

Date : February 2014

Process arguments

Read input data

Pre-processing

Read full resolution data

Read/collocate GRIB data

Inversion

Ice screening

Ambiguity Removal

Post-processing

Write output BUFR message

Figure 4.1 Baseline of the ASCAT Wind Data Processor

4.1.2 Layered model structure

AWDP is a Fortran 90 program consisting of several Fortran 90 modules which are linked after their individual compilation. The AWPD program is set up from two layers of software modules.

The purpose of the layer structure is to divide the code into generic scatterometer processing software and ASCAT specific software. Details on the individual modules can be found in sections

4.2 and 4.3.

The first layer (the process layer) consists of modules which serve the main steps of the process.

Module name

Τasks Comments

awdp_data awdp_bufr awdp_pfs awdp_prepost awdp_grib

Definition of data structures

BUFR file handling

PFS file handling

Sorting of input

Quality control

Post processing

Monitoring

Clean up

GRIB file handling

Collocation of GRIB data

Interface to genscat/support/bufr

Interface to genscat/support/pfs

Duplicate rows are merged

Usability of input data is determined

Setting of flags

Deallocation of used memory

Interface to genscat/support/grib

NWP data are interpolated w.r.t. time and location

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