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CDF_EPOCH (was Re: Time Woes) [message #30550 is a reply to message #30471]

Thu, 02 May 2002 12:05

Brian Jackel
Messages: 34
Registered: January 1998

Member

Hi

I've found the CDF_EPOCH routine to be very
useful for this kind of thing. For your example

CDF_EPOCH,epoch0,1980,1,1,0,0,0,/COMPUTE
CDF_EPOCH,today,2002,05,02,12,50,30,/COMPUTE
dt= (today-epoch0)/1.0d3 ;difference in seconds

This doesn't directly address the tricky question
of leap-seconds, but the CDF source code is available
(http://nssdc.gsfc.nasa.gov/cdf/cdf_home.html)
so in theory you could check it to see what goes on
inside.

Brian

David Fanning wrote:
>
> Folks,
>
> OK, I'm completely lost.
>
> I've been perusing the JHAPL IDL library for days, it seems like,
> but my eyes are still crossed.
>
> I have a time array that purports to be the number of seconds
> from 1 Jan 1980. How in the world do I convert that to something
> I can use with routines I have access to?
>
> Thanks,
>
> David

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[Message index]

		Time Woes By: David Fanning on Wed, 01 May 2002 12:41
		Re: Time Woes By: Craig Markwardt on Thu, 02 May 2002 15:26
		Re: Time Woes By: thompson on Thu, 02 May 2002 14:51
		Re: Time Woes By: btupper on Thu, 09 May 2002 07:21
		CDF_EPOCH (was Re: Time Woes) By: Brian Jackel on Thu, 02 May 2002 12:05
		Re: Time Woes By: Struan Gray on Thu, 02 May 2002 08:34
		Re: Time Woes By: David Fanning on Thu, 02 May 2002 06:38
		Re: Time Woes By: btupper on Thu, 02 May 2002 06:11
		Re: Time Woes By: Ken Mankoff on Thu, 02 May 2002 06:07
		Re: Time Woes By: Paul Van Delst[1] on Wed, 01 May 2002 14:24
		Re: Time Woes By: David Fanning on Wed, 01 May 2002 14:00
		Re: Time Woes By: Robert Stockwell on Mon, 06 May 2002 06:14
		Re: Time Woes By: Ken Mankoff on Wed, 01 May 2002 13:10

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