/** \page synop_page SYNOP decoding \tableofcontents \section what_is_snyop What is Synop \subsection wether_data Weather data SYNOP, which stands for surface synoptic observations is a numerical code used for reporting weather observations made by manned and automated fixed land weather stations. It is also called FM-12 by the
World Meteorological Organization. It is closely associated to FM 13-XIV SHIP, for report of surface observation from a sea station (Created in 1982) and FM 14-XIV SYNOP MOBIL, for reports of surface observation from a mobile land station.
Here is an example of undecoded SYNOP weather report:
13586 31530 80000 10036 20029 39821 40218 53002 71022 886// 333 20029 88715= Many SYNOP reports are available on web sites such as Ogimet .
\subsection synop_reports Synop reports broadcasts The most important broadcaster on SYNOP data is DWD, in RTTY mode.
\subsubsection deutsche_schedule Deutsche Wetterdienst schedule SYNOP reports are typically sent every six hours by Deutscher Wetterdienst on shortwave and low frequency using RTTY. The baud rate must be 50 bauds.
Freq | Station | Time |
:-------------|:------|:--------------|:------------ 147,300 kHz | DDH47 | 05.00 - 22.00 | + / - 42,5 4583,000 kHz | DDK2 | 00.00 - 24.00 | + / - 225,0 7646,000 kHz | DDH7 | 00.00 - 24.00 | + / - 225,0 10100,800 kHz | DDK9 | 00.00 - 24.00 | + / - 225,0 11039,000 kHz | DDH9 | 05.00 - 22.00 | + / - 225,0 14467,300 kHz | DDH8 | 05.00 - 22.00 | + / - 225,0 \subsubsection other_broadcasters Other broadcasters Until recently, many shore stations used to transmit Synop reports by Morse Code (\"Ocean Yacht Navigator\", Kenneth Wilkes, 1976 ). Still, according to WMO information for shipping, a couple of maritime stations might broadcast these informations in different mode that RTTY, but this has not been tested yet. There are just anecdotically cited here. Maritime Radio Station of Mumbai Met codes: FM 12 - SYNOP, FM 13 - SHIP for Sea areas I.
Band | Freq :--------|:-------- WT (MF) | 500 kHz WT (MF) | 521 kHz WT (HF) | 8630 kHz WT (HF) | 12710 kHz
SYNOP decoding is not accessible fromMorse CW modem yet.
Navtex station of Mumbai. COMCEN FM 12 SYNOPSIS, FM 13 SHIP for sea area I (Time schedule 0900, 2100)

| Freq :----|:--------------- Navtex (Also called MSI as Maritime Safety Information) | 518 kHz
SYNOP decoding is not accessible from Navtex modem yet.
Marine Rescue Co-ordination Centre: Guayaquil, Radio IOA (Instituto Oceanografico Armada) o Radio Naval Meteorological information in process: Text, SHIP, SYNOP.
Mode | Freq :----|:--------------- AM | 1515 kHz
\section synop_parameters Parameters \image html config-rtty-synop.png "Synop configuration in RTTY tab" \image latex config-rtty-synop.png "Synop configuration in RTTY tab" width=5.0in
By default, there is not SYNOP decoding of RTTY reception, so its behavior does not change. However, it receives three new parameters related to Synop decoding. SYNOP reports can be saved to the current ADIF log file: They are visible in the journal of QSOs with the content of the report, the timestamp, and the Maidenhead locator equivalent to the geographical coordinates of the emitter of the report. SYNOP weather reports can also be plotted on KML files: They can then be visualized in KML viewers such as Google Earth. If SYNOP reports are saved either to ADIF or KML files, fldigi attempts to detect and decode RTTY messages. When these messages are detected, they are displayed in the reception window. An extra parameter allows to replace the coded Synop message, giving clarity at the risk of loosing information, or mix the decoded reports with the original group of digits (Interleaving of SYNOP and text). \section reception_window Reception window When SYNOP messages are detected, they are displayed in the reception window in \"red\" characters (depicted here in \"italic\"). Here are some examples (Interleaved text and SYNOP reports):
13661 16123 99276 70216 46/// WMO Station=13661 WMO station=WMO_13661 UTC observation time=2013-02-16 12:00 QLLLL token=Present Longitude=-21.6 Latitude=27.6 ///// 40206 52011 222// 00203; Sea surface temperature=20.3 --C Temperature type=Intake measurement 64522 16123 99591 70347 46/// WMO Station=64522 WMO station=WMO_64522 UTC observation time=2013-02-16 12:00 QLLLL token=Present Longitude=-34.7 Latitude=59.1 ///./ 49920 57004. ::(1056; , 26555 16123 998#6 WMO Station=26555 WMO station=WMO_26555 UTC observation time=2013-02-16 12:00 70269 46/// ///// 40168 52008; WMO Station=70269 WMO station=WMO_70269 Precipitations=Omitted, no observation Station type=Automated station. No observation (No 7WW) Visibility=Missing Wind direction=No motion or no waves Wind speed=0 knots (Estimated) Sea level pressure=1016 hPa Pressure tendency=Increasing steadily. Raises Pressure change=0.8 hPa 25617 16123 99867 1173!((6; WMO Station=25617 WMO station=WMO_25617 UTC observation time=2013-02-16 12:00 QLLLL token=Present 149 52001; 13660 16123 992!; WMO Station=13660 WMO station=WMO_13660 UTC observation time=2013-02-16 12:00 ).'/ ///// 40222 52&17 52"// 08)02; 44551 16123 99376 70378 46//. WMO Station=44551 WMO station=WMO_44551 UTC observation time=2013-02-16 12:00 QLLLL token=Present Longitude=-37.8 Latitude=37.6 ///// 40185 52022; Sea level pressure=1018 hPa Pressure tendency=Increasing steadily. Raises Pressure change=2.2 hPa 62680 16123 9958" WMO Station=62680 WMO station=Atbara UTC observation time=2013-02-16 12:00 70265 66//? BMPROIIO TUPEQ 222!/ 00078; 64527 16123 99593 70483 46/// WMO Station=64527 WMO station=WMO_64527 UTC observation time=2013-02-16 12:00 QLLLL token=Present Longitude=-48.3 Latitude=59.3 ///// 40095 52004 \section data_files Data files Several data files containing public information are used to decrypt SYNOP data. They come from various places on the Internet, with redundancy.

NOAA	WMO identifier, name and coordinates of thousands of weather stations in the world.
http://weather.noaa.gov/data/nsd_bbsss.txt
NOAA	Weather, drifting, moored and wave riders buoys. Oil platforms. Fixed and mobile offshore drilling unit.
ftp://tgftp.nws.noaa.gov/data/observations/marine/stations/station_table.txt
UK's National Weather Service	Name, country and description of weather ships
http://www.metoffice.gov.uk/media/csv/e/7/ToR-Stats-SHIP.csv
Joint WMO IOC Technical Commission for Oceanography and Marine Meteorology	Argos and Iridium buoys, with WMO identifiers.
ftp://ftp.jcommops.org/JCOMMOPS/GTS/wmo/wmo_list.txt

There is a specific window for downloading the latest version of these data files. It can be reached with the command "File/Folders":
\image html Opening-DataFiles-Menu.png "How to reach the data files sources menu" \image latex Opening-DataFiles-Menu.png "How to reach the data files sources menu" width=3.48in
These data files can also be found:

At installation time your fldigi binary comes with a package. All data files are silently installed on your machine.
When building your own binary from the sources, with the command make install. Similarly, all files are installed.
At first use and automatic installation, this opens the Data files sources menus, where you can download all or some data files used by fldigi.

\image html DataFilesSources.png "Downloading and updating data files used for various decodings" \image latex DataFilesSources.png "Downloading and updating data files used for various decodings" width=5.0in
\subsection synop_outputs Outputs Each message is a set of key-value pairs, associated to:
Description | Measurement :--------------------|:---------------- Wind direction | 315 degrees Wind speed | 8 m/s (Anemometer) Temperature | 0.0 deg C Dew point temperature | -3.8 deg C Station pressure | 1006 hPa Sea level pressure | 1030 hPa \subsection output_formats Output formats \subsubsection ADIF When the option is ticked, SYNOP weather reports are saved in a new ADIF record, in the default logfile.
The report itself is saved with field \. The length can be of several hundredth of chars, and accordingly to the ADIF standard, new-lines can appear in each report.
Example of \ field in an ADIF record: \verbatim Header ICAO indicator=LOWM Identification and location Land station observation Land observations Precipitations=Precipitation omitted, no precipitation Station type=Manned station. 7WW omitted, not significant Cloud base=600 to 1000 m Visibility=15 km Cloud cover=7/8 \endverbatim
\subsubsection KML SYNOP reports can generate \ref kml_page "KML" files for fixed stations, mobile weather ships, buoys etc... that is, every observation which can be associated to a set of coordinates. Several reports of the same station can be aggregated in a single place mark. Mobile stations have their path drawn, linking all coordinates spotted for a given station with an unique name.
KML data are are also saved in a display-independent format in \ tags, and thus can easily be reused by other software.
\section command_line_synop Command-line SYNOP decoder program : synop_tool The decoder comes with synop_tool, a command-line tool able to decode input text files and generate the same output files as fldigi. It is intended as a development for checking internal consistency, and accuracy of SYNOP decoding without the complexity of the graphical interface. It is accessible in the directory fldigi/src/synop-src and must be built with the command make.
Its command-line options are displayed with the option --help:
\verbatim [fldigi/src/synop-src]$ ./synop_tool --help Valid options are: data_dir # Where the data files are stored. For example /usr/local/share/fldigi/ kml_dir # Out put directory of created KML files. load_dir # Input directory of KML files loaded at startup. dbg # Verbose mode. usage # Print this message. test # Decoding preceded by an internal test. matrix # KML output in aggregated matrices (See KML documentation). regex # text output of regular expressions, not decoded reports. version # Prints version number. help # Prints this messages \endverbatim
\ref synop_page "Return to Top of Page"
\ref main_page "Return to Main Page" */