Bufr Decoding Software Windows
Command-line BUFR file decoding program. Version 0.1.0 100627. Initial release. Version 0.1.1 100630. Use PARutil to purge PAR cache. Version 0.2.0 121013. Uses latest BUFR decode engine and tables. Handles uncompressed BUFR files (see User Guide for CSV format changes). Release Linux versions (32 &.
- NCEP Home NCO Home Systems Integration Branch Decoders BUFRLIB BUFRLIB Table of Contents General-purpose utility for decoding BUFR files Printer Friendly Version Example Program: General purpose utility for decoding BUFR files. In this example, we show how various BUFRLIB subroutines and functions can be integrated within an application program to read and dump the.
- The NCEP PREPBUFR decoding program is written in Fortran 77 and has been successfully compiled on Linux computers using pgi90, SGI® computers with f77. The output of tar should yield individual 6-hourly NCEP PREPBUFR data files for the observations in the +/- 3-hour time windows of 00Z, 06Z, 12Z, and 18Z of.
BUFR File Summary
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There are zero file types associated with the BUFR File Extension, with the most widely-observed being the Binary Universal Form for the Representation format. According to our database, zero distinct software programs (conventionally, Binary Universal Form for the Representation developed by Unknown Developer) will enable you to view these files.
Both desktop and mobile devices enable you to view and (sometimes) edit these files, depending on the software used. The main BUFR file type has a Popularity Rating of 'Medium', meaning these files are intermittently observed on your typical desktop or mobile device.
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Although there is a lot more to know about BUFR files, those are the most important details of these types of files. If you are having trouble opening these files, or would like more detailed information, please see our comprehensive information below.
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The Binary Universal Form for the Representation of meteorological data (BUFR) is a binarydataformat maintained by the World Meteorological Organization (WMO). The latest version is BUFR Edition 4. BUFR Edition 3 is also considered current for operational use. BUFR was created in 1988 with the goal of replacing the WMO's dozens of character-based, position-driven meteorological codes, such as SYNOP (surface observations), TEMP (upper air soundings) and CLIMAT (monthly climatological data). BUFR was designed to be portable, compact, and universal. Any kind of data can be represented, along with its specific spatial/temporal context and any other associated metadata. In the WMO terminology, BUFR belongs to the category of table-driven code forms, where the meaning of data elements is determined by referring to a set of tables that are kept and maintained separately from the message itself.
BUFR is a complex format that can be difficult to use [1] and it presents some weaknesses[2]. The introduction of BUFR format lead to data 'disparition' and many formatting errors [3][4][5].
- 1Description of format
- 3External links
Description of format[edit]
A BUFR message is composed of six sections, numbered zero through five.
- Sections 0, 1 and 5 contain static metadata, mostly for message identification.
- Section 2 is optional; if used, it may contain arbitrary data in any form wished for by the creator of the message (this is only advisable for local use).
- Section 3 contains a sequence of so-called descriptors that define the form and contents of the BUFR data product.
- Section 4 is a bit-stream containing the message's core data and meta-data values as laid out by Section 3.
The product description contained in Section 3 can be made sophisticated and non-trivial by the use of replication and/or operator descriptors. (See below for a brief overview of the different kinds of descriptors; refer to the WMO Guide on BUFR for further detail.)
Templates[edit]
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Section 3 contains a short header followed by a sequence of descriptors that matches the contents of Section 4's bit-stream. The sequence of descriptors in Section 3 could be understood as the template of the BUFR message. The template contains the information necessary to describe the structure of the data values embedded in the matching bit-stream. It is to be interpreted in a step-by-step, algorithm-like manner. Given a set of BUFR messages, the values contained in Section 4 may differ from one message to the next, but their ordering and structure will be kept predictable if the template provided in Section 3 remains unchanged. Templates can be designed to meet the requirements of a specific data product (weather observations, for instance). Such templates can then be used to standardize the content and structure of BUFR data products. The WMO has released a number of BUFR templates for surface and upper air observational data.
Descriptors[edit]
All descriptors, 16 bits wide, have a F-X-Y structure, where F refers to the two most significant bits (leftmost); X refers to the 6 middle bits and Y to the least significant (rightmost) 8 bits. The F value (0 to 3) determines the type of descriptor.
- Element descriptors (F=0): As the name implies, these descriptors are used to convey elemental data and related meta-data.
The X value identifies the Class of the descriptor (i.e. Horizontal Coordinate parameters, Temperature parameters, etc.). The Y value is the descriptor's number within its class. Element descriptors classes 1 through 9 have the special property of remaining in effect from the moment they appear throughout the remainder of the BUFR template, unless contradicted or cancelled. In practice, class 1 through 9 descriptors are used for spatial, temporal and other meta-data that is applicable to the core data of the BUFR message.
All element descriptors are defined in a section of the BUFR specification known as 'Table B'. The addition of new element descriptors in Table B does not require changes to the BUFR software specification. The Table B definition of an element descriptor includes its number, short text definition, decoding parameters (bit width, scale factor, and bias), and type (numerical, character string, code table, etc.). - Replication descriptors (F=1): Special descriptors that allow for the controlled repetition of a chosen number of descriptors. This is a very powerful operation that introduces loop-like structures in BUFR templates. The X value specifies the number of following descriptors to be included in the replication; the Y value indicates how many times the replication is to take place. If Y=0, then the replication is called a 'delayed replication' and the number of replications is to be obtained from the value of a special element descriptor.
- Operator descriptors (F=2): These descriptors convey special operations that can modify the character of data or allow for the creation and manipulation of additional data alongside the original. The X value identifies the operator and the Y value is used to control its application. These descriptors are defined in a section of the BUFR specification known as 'Table C'. The addition of new operator descriptors in Table C does require changes to the BUFR software specification, and therefore leads to a new BUFR Edition Number.
- Sequence descriptors (F=3): A single sequence descriptor is an alias for a sequence of other descriptors, including replication descriptors and Table B, C and D entries. These descriptors are defined in a section of the BUFR specification known as 'Table D'. The use of the X and Y value is the same as with Element Descriptors.
Subsets[edit]
The data structure established in the Section 3 template may be re-used multiple times within a single BUFR message. In such a case, Section 4 will contain a succession of so-called subsets. For instance, subsets could be used to convey observations from several locations in a single message.
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References[edit]
- ^https://www.eumetsat.int/website/wcm/idc/idcplg?IdcService=GET_FILE&dDocName=PDF_CONF_P57_S5_01_KARHILA_V&RevisionSelectionMethod=LatestReleased&Rendition=Web
- ^https://ams.confex.com/ams/93Annual/webprogram/Paper221675.html
- ^http://science.sciencemag.org/content/352/6283/281
- ^https://ams.confex.com/ams/97Annual/webprogram/Paper305058.html
- ^https://software.ecmwf.int/wiki/display/TCBUF/ECMWF?preview=/29332277/46924609/Migration_2_BUFR_Report.pdf
External links[edit]
- WMO table-driven code forms guides (Expands on the BUFR Manual but should be considered a secondary source to the Manual)
- A third-party tutorial on creating BUFR templates (from Environment Canada)
Online BUFR validators[edit]
Software libraries[edit]
- ECMWF provided BUFRDC library and the new ecCodes library. Magics and Metview use these to process and visualise BUFR data.
- NCAR wmobufr library — Java library and XML implementation
- fortran and c-based python wrappers around the ECMWF library
- wreport Free Software C++ library implementing encoding and decoding of BUFR and CREX
- trollbufr, a FOSS pure Python BUFR reader and writer