Join GitHub today
GitHub is home to over 28 million developers working together to host and review code, manage projects, and build software together.Sign up
Shell Makefile C M4
Fetching latest commit…
Cannot retrieve the latest commit at this time.
|Failed to load latest commit information.|
$Id: README,v 1.2 2005/06/23 07:07:18 kees-guest Exp $ METAR reports are meteorogical weather reports for aviation. Metar is a small program which downloads weather reports for user-specified stations and optionally decodes them into a human-readable format. Currently, metar supports decoding date/time, wind, visibility, cloud layers, temperature, air pressure and weather phenomena, such as rain, fog, etc. Also, more work in the area of clouds need to be done, as support for Cumulus or Cumulunimbus is not yet decoded. There is a distinct difference between European METAR reports and US Metar reports. A US METAR report typically looks like: KJFK 141751Z 33017G22KT 10SM FEW050 02/M10 A3005 RMK AO2 SLP174 T00221100 10033 20017 51007 This METAR can be decoded as follows: KJFK John F. Kennedy Airport, New York, New York, This is the ICAO identifier of the airport. 141751Z The report is of the 14th of the month, at 17:51Z (which is 12:51pm local time in New York in the winter.) 33017G22KT The wind is coming from the direction of 330 degrees (Northwest) at 17 knots, with wind gusts to 22 knots. 10SM Visibility at the ground is clear (10 statue miles or more) FEW050 FEW clouds at 5000 feet. Few is METAR-speak for 2/8 cloud cover. 02/M10 The temperature is 2 degrees Celcius, with the dewpoint at -10C. A3005 The altimeter setting (air pressure) is 30.05 inches Hg RMK etc Remarks local to the field. A European METAR report: EHAM 141825Z 18010KT 2700 BR SCT003 BKN004 04/04 Q1024 BECMG BKN003 EHAM Amsterdam Schiphol Airport, The Netherlands. 141825Z The report is of the 14th of the month, at 18:25Z (which is 19:25 local time in Amsterdam in the winter. 18010KT The wind is coming from 180 degrees (due South) at 10 knots. 2700 Visibility at ground level is 2700 meters. BR Mist (visibility at least 5/8 statue mile) SCT003 Scattered clouds at 300 ft (SCT is 4/8 cover) BKN004 Broken clouds at 400 ft (BKN is 5/8 through 7/8 cover) 04/04 Temperature 4 degrees C, dewpoint 4 C Q1024 Air pressure at 1024 hPa BECMG BKN003 Becoming BK003, cloud layer is changing to BKN at 300 ft. The program currently supports the following command line paramters: -d Decode METARs -h Show a short usage summary -v Be verbose Currently recognized weather phenomena are: Descriptors MI Shallow BL Blowing BC Patches SH Showers PR Partial DR Drifting TS Thunderstorm FZ Freezing VC Vicinity Weather phenomena DZ Drizzle IC Ice Crystals UP Unkniwn RA Rain PL Ice Pellets SN Snow GR Hail SG Snow Grains GS Small hail/snow pellets Obscuration BR Mist (or vis <= 5/8 sm) SA Sand FU Smoke HZ Haze VA Volcanic Ash PY Spray DU Widespread Dust Other SQ Squall FC Funnel Cloud SS Sand storm +FC Tornado/Watersprout DS Dust storm PO Well developed dust/sand swirls Metar sources and bug tracking are gracefully hosted by the Debian project. Please visit http://alioth.debian.org/projects/metar/ for more information. % END-OF-FILE