Re: times in metar files

On Wed, 16 Nov 2005, Don Murray wrote:

> Robb-
>
> What do you consider the "nominal_time" variable to contain
> in the metar netCDF files?
Don,

nominal_time means the time the report is valid. the algorithm i use is if
the report is before 45 minutes after the hour then nominal_time == ob time
otherwise nominal_time is set to be the zero minute of the next hour. this
is what the documentation states but it's dated 1996 so i don't know if
the nominal_time definition has changed in the latest specs.


 Do you break the hour up
> into segments?

noop

  I see that some of them are only 60 seconds
> apart, so I'm wondering how they are being binned.
>
> Also, there's a typo for the weather variable long name.
> It reads:
>
>                  weather:long_name = "Weather phenomenia" ;
>
> it should be:
>
>                  weather:long_name = "Weather phenomena" ;
thanks
>
> Also, Chiz mentioned that he's working on a new station
> table because several stations have changed id's.  You
> might want to check with him on that.

i use the latest gempak tables for every release so i should be ok. maybe
i'll make a minor release for the tables.

robb...


>
> Don
> *************************************************************
> Don Murray                               UCAR Unidata Program
> address@hidden                        P.O. Box 3000
> (303) 497-8628                              Boulder, CO 80307
> http://www.unidata.ucar.edu/staff/donm
>          "Time makes everyone interesting, even YOU!"
> *************************************************************
>
>

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================