Greg,
Ah... the joys of processing the metar "standard". I made a C program that
makes corrections to certain obvious errors in the metars. Over the years
I've been adding more and more "events". It's up to 25 now, with 2 more
waiting for my attention... The international sites are the most error
prone, but good ole USA sites are not immune. Quality control at data entry
sounds like a wonderful and logical idea. Therefore, according to Murphy's
Law, it'll never happen!
Steve
On Wed, Aug 9, 2017 at 10:21 AM, Greg Thompson <gthompsn@xxxxxxxx> wrote:
>
> Daryl,
>
> The number of *exceptions* for METARs, TAFs, and many other NWS products
> is insane. My software will ingest the incorrect MR0C just fine, and my
> program that seeks out unknown 4-letter IDs found in the METAR DB I
> maintain but are not known lat/lon will reveals many sites that were typos.
>
> When will someone ever employ software checking upon data entry to prevent
> things like this? Never at the rate we're going. The worse condition in
> my opinion is when the time stamp is completely wrong - such as POST-dated
> METAR data. It happens all the time and they merrily end up in final files
> as supposedly good info.
>
> --Greg
>
>
> On Tue, Aug 8, 2017 at 10:14 PM, daryl herzmann <akrherz@xxxxxxxxxxx>
> wrote:
>
>>
>> Oh the fun of processing METARs. Behold the METAR site MROC Juan
>> Santamaria, Costa Rica. Here's the 0z ob
>>
>> SACS31 MROC 090000
>> METAR
>> MROC 090000Z 25005KT 5000 BR FEW005 SCT015 23/23 A2993 NOSIG=
>>
>> and here's the 1z ob:
>>
>> SACS31 MROC 090100
>> METAR
>> MR0C 090100Z 24005KT 3000 BR FEW002 BKN010 23/22 A3000 NOSIG=
>>
>> Notice what's wrong? :) So the Oh became a zero! So the KWBC collective
>> then missed it.
>>
>> SACA35 KWBC 090100
>> METAR
>> ...snipped...
>> MROC NIL=
>>
>> So should I account for this in my METAR ingesting code somehow or alas,
>> the 1z ob on 9 August 2017 is lost forever for MROC :(
>>
>> daryl
>>
>> --
>> /**
>> * daryl herzmann
>> * Systems Analyst III -- Iowa Environmental Mesonet
>> * https://mesonet.agron.iastate.edu
>> */
>>
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>
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