Re: Problem when there's no dew-point

[Tom M. <to...@un...>]

Ahhhh I see. So it's a bug with PHPWeather's handling of the METAR feed.
Interesting that the UK have different METAR coding rules than everyone
else. You'd have expected ICAO to have standardised it all. Though I guess
getting everyone to agree on something might be a tad optimistic ;)

Thanks for the reply, anyway.

Tom

> From: Nick B <nic...@ya...>
> Date: Sat, 14 Jun 2003 16:48:49 +0100
> To: php...@li...
> Subject: Re: Problem when there's no dew-point
> 
> Tom McDonald wrote:
> 
>> I assume that Leeds Bradford Airport are returning their metar reports in
>> the wrong format, and should just be returning "18/" if they are not
>> including dew point rather than "18///".
>> 
>>  
>> 
> Thats the correct format Tom. The UK METAR coding rules say that if dew
> point is not available the it should be replaced by a double ellipsis
> "//". I must have a word with my friends in ATC Engineering there and
> ask them to fix it ;-)
> 
> 
> To quote from UK AIP GEN 3.5.10:
> ----snip----
> 9 Air Temperature/Dewpoint
> 9.1 These are given in Degrees Celsius, M indicates a negative value .
>      Examples 10/03, 01/M01.
> 
>      If the dew point is missing, the temperature would be reported as
> 10///
> ----unsnip----
> 
> If anyone would like access to the UK AIP you can register for free at
> http://www.ais.org.uk/  . Publications are available in PDF format.
> 
> Regards,
> Nick B.
> 
> 
> 
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