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some question about METAR RMKs

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2008-06-11
2013-05-20
  • kerry young

    kerry young - 2008-06-11

    Hello!
    I am a weather analyst. I find your project in google when I try to find the regional METAR encode rules. I use your live-demo, and i am very interesting with your program. It is useful. I have a question about METAR, and i think you can help me.

    Q: You know that the METAR is encoded according to "Manual on Codes" of WMO, but many countries have their own regional rules to encode METAR-RMK. For example,in this RMK "UHMM 300600Z 21005MPS .... RMK QFE735 88010070", 88010070 means the status of all runways.Why "88" means "all runways"?!
    If there are some encode rules of the Russian RMKs? I think you can help me.

    So can you send me the regional METAR RMK rules which you know? my e-mail : kerry.eva@gmail.com
    I have found some RMK rules about Mongolia(your live-demo can not decode) and Australia auto-station, and i wish to share with you, but i do not have your e-mail.
    Wait your nice reply.
    Thank you very much!

     
    • metaf2xml

      metaf2xml - 2008-06-11

      Hi Kerry,

      I'm not sure where I got the runway decoding from initially, but if you
      search for '"snoclo" "88"' in the 'net you will find many places where
      it is described:

          - 88:  all runways
          - 99:  previous runway repeated
          - >50: subtract 50 and append "R" ("74" becomes "24R")
         
      I think this is not specific to any region but used by many countries.
      I dont't know why it is coded like that.

      The only decoding rule for Mongolia (actually, the only airport I found
      is ZMUB) is the QFE, which I assume is the air pressure as measured at
      the station in mm Hg. It is special for stations with ICAO codes
      starting with U and ZM that they have a komma instead of the decimal
      point.

      Other remarks special to russian airports that are recognised:

          - UTxx: cloud types for low, middle, and high clouds
          - ULxx: runway wind
          - Uxxx: cloud type with cloud base
          - UTTP, UTSS: QFE in hPa

      My e-mail address is not a secret. Just click on the link in the By:
      line of this article, it is metaf2xml at users sourceforge net.
         
      Thanks for your interest!

      Looking forward to hearing from you,
      Thomas

       
    • metaf2xml

      metaf2xml - 2008-06-20

      Hi Kerry,

      just in case you are wondering why I did not reply to your e-mail: I haven't received any yet :-) If you already sent e-mail, it didn't come through. Maybe you have received my e-mail.

      Anyway, unless you want a private discussion via e-mail, we could also start to use the "Feature Requests" tool from the "Tracker" provided by sourceforge; that would make it easier for me, as I have access to e-mail less often than to the forums here.

      Thanks!
      Thomas

       

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