[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 20100513: new NDFD model data for conduit

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: Re: 20100513: new NDFD model data for conduit
  • Date: Mon, 14 Jun 2010 13:31:27 -0600 (MDT)
Timothy,

Thanks for the information in the previous email.
Working with the new NDFD data, I noticed that the given End time intervals were not consistent with other NCEP type models.
I was wondering why the NDFD data uses the start of interval as the given End of Interval using Octets 35-41 in PDS 4.8? It would of made more sense to me to use the End of Interval as it's calculated from the time 
ranges. Here's an example:

productType  8
Reference Time  Wed May 12 15:00:00 MDT 2010
End of Interval from time ranges Mon May 17 06:00:00 MDT 2010
End of Time Interval from octets 35-41 Sun May 16 06:00:00 MDT 2010
Interval Start Stop =87 111

RT = May 12 15:00:00
End of Time Interval from octets 35-41 = RT + 87 hours
End of Interval from time ranges = RT + 111
Almost all other NCEP models use the End of Interval from time ranges as the given End of Interval in Octets 35-41 

Thanks,
RObb...

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