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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 ============================================ 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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