Reposting at John Caron's request:
-----------------
John,
I agree with Don.
Section 1 Octet 12 of GRIB2 files in most of the
NCDC-nomads archive ~ are entirely
= 1 "start of forecast". There is a bit of semantics
there.. but I believe this is intneded to be
analogous to the term "start of the model cycle's forecasts"
I think it is safe to assume it is a reference time when
this Octet 12 value is equal to 1.... or zero as well.
If its not 0 or 1.. more care needs to be taken.
Given the above is true...
In the case of a 12-24 hour valid time frame.
I would hope the start of time frame (P1) =12,
end of time frame (P2) = 24, with a type of statistical
processing set to average. These tiem frams are
defined in the PDS and are offsets to the reference time.
On Mon, Dec 2, 2013 at 11:39 AM, John Caron <caron@xxxxxxxxxxxxxxxx> wrote:
> Hi Dan - I cant find your post anywhere. Can you re-post?
>
> thredds@xxxxxxxxxxxxxxxx
> netcdf-java@xxxxxxxxxxxxxxxx
>
> On 12/2/2013 9:23 AM, Glenn Rutledge - NOAA Federal wrote:
>
>> yes John,
>> Dan Swank posted early on and it's not shown up....
>>
>>
>>
--
=======================================
Dan Swank
NCDC-NOMADS Project
Team ERT/STG
(NCDC Government Contractor)
Data Access & Applications Branch
Veach-Baley Federal Building
151 Patton Avenue
Asheville, NC 28801-5001
Email: Dan.Swank@xxxxxxxx
Phone: 828-271-4007
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Any opinions expressed in this message are mine personally and
do not represent any position from STG, ERT, NCDC, or NOAA
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