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Re: Julian Day Question [message #48853 is a reply to message #48851]

Tue, 30 May 2006 15:46

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

Paul Van Delst wrote:
> However, it the two julday results up top still seem inconsistent. If
> I'm an astronomer and my day start reference for input to the julday
> routine is 12 noon, then why do julday(1,1,1,0,0,0) and julday(1,1,1)
> provide different results? Doesn't julday(1,1,1,0,0,0) refer to 0hours,
> 0minutes, 0seconds beyond the (12noon) start of the day? Why does
> providing the ",0,0,0" hh,mm,ss data cause the start reference to
> suddenly shift by 12 hours?

It is not useful to ask how it *should* work and *why* it works the way
it does. It is only useful to observe *how * it works and find a way of
coping with it.

--
Mark Hadfield "Kei puwaha te tai nei, Hoea tahi tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Re: Julian Day Question By: David Fanning on Tue, 30 May 2006 16:02
		Re: Julian Day Question By: Mark Hadfield on Tue, 30 May 2006 15:46
		Re: Julian Day Question By: Mark Hadfield on Tue, 30 May 2006 15:42
		Re: Julian Day Question By: David Fanning on Fri, 26 May 2006 12:31
		Re: Julian Day Question By: K. Bowman on Fri, 26 May 2006 11:30
		Re: Julian Day Question By: Paul Van Delst[1] on Fri, 26 May 2006 10:09
		Re: Julian Day Question By: news.qwest.net on Fri, 26 May 2006 10:05
		Re: Julian Day Question By: news.verizon.net on Fri, 26 May 2006 09:57
		Re: Julian Day Question By: news.qwest.net on Fri, 26 May 2006 09:53
		Re: Julian Day Question By: Paul Van Delst[1] on Fri, 26 May 2006 09:43
		Re: Julian Day Question By: James Kuyper on Fri, 26 May 2006 09:20
		Re: Julian Day Question By: Paul Van Delst[1] on Fri, 26 May 2006 07:20
		Re: Julian Day Question By: David Fanning on Fri, 26 May 2006 07:17
		Re: Julian Day Question By: Mike Wallace on Fri, 26 May 2006 07:05
		Re: Julian Day Question By: Greg Hennessy on Fri, 26 May 2006 04:40
		Re: Julian Day Question By: David Fanning on Thu, 25 May 2006 23:48
		Re: Julian Day Question By: David Fanning on Thu, 25 May 2006 23:28
		Re: Julian Day Question By: David Fanning on Thu, 25 May 2006 23:21
		Re: Julian Day Question By: Craig Markwardt on Thu, 25 May 2006 22:52
		Re: Julian Day Question By: David Fanning on Thu, 25 May 2006 23:13
		Re: Julian Day Question By: David Fanning on Thu, 25 May 2006 23:03
		Re: Julian Day Question By: Mike Wallace on Thu, 25 May 2006 22:27
		Re: Julian Day Question By: Paul Van Delst[1] on Fri, 02 June 2006 10:03

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