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NCEP Reanalysis Temperature Data Problem [message #56518]

Thu, 25 October 2007 09:56

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

I am looking at some monthly NCEP Temperature Data, stored in a
NetCDF file:

http://www.cdc.noaa.gov/dtat.ncep.reanalysis.pressure.html

I have no problem reading the data file, but the time data,
which is suppose to be monthly from 1 Jan 1948 to present,
has a min and max values of 17067072 and 17590104. These looks like
Julian numbers to me, except they are off by several orders
of magnitude from anything that makes sense to me!!

IDL> Caldat, 17067072, m, d, y
IDL> Print, m, d, y
12 15 42015

These numbers are even several orders of magnitude bigger
than the number of SECONDS since 1948. :-(

Does anyone have any experience with this data set and
have some idea of how I can get these values into something
that makes sense?

Thanks,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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