comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Re: Time convertion

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Time convertion [message #24222 is a reply to message #24126]

Wed, 14 March 2001 11:52

tam
Messages: 48
Registered: February 2000

Member

JD Smith wrote:
... In any case,
> it is oh so trivial to convert date to systime, the inverse:
>
> st=(julday(month,day,year,hr,min,sec)-2440587.5D)*86400.0D
>
> That's it! For instance:
>
> IDL> st0=systime(0) & st1=systime(1)
> IDL> d=bin_date(st0)
> IDL> st=(julday(d[1],d[2],d[0],d[3],d[4],d[5])-2440587.5D)*86400. 0D
> IDL> print,FORMAT='(A,":",2D30.5)',st0,st1,st
>
...
>
> JD

How are leap seconds accounted for here? They usually cause
niggling problems if one actually needs to worry about
precision at the second level over periods of more than a
month or two. It looks like your code is ignoring them.
The biggest pain is that they are not predictable so the
code needs to access an external file, or update an
internal table periodically.

Regards,
Tom McGlynn

Report message to a moderator

[Message index]

		Re: Time convertion By: Pavel A. Romashkin on Wed, 14 March 2001 10:57
		Re: Time convertion By: John-David T. Smith on Wed, 14 March 2001 10:50
		Re: Time convertion By: Liam E. Gumley on Wed, 14 March 2001 10:17
		Re: Time convertion By: davidf on Wed, 14 March 2001 09:44
		Re: Time convertion By: Pavel A. Romashkin on Wed, 14 March 2001 09:09
		Re: Time convertion By: Alex Schuster on Tue, 20 March 2001 06:03
		Re: Time convertion By: R.Bauer on Mon, 19 March 2001 13:12
		Re: Time convertion By: tam on Wed, 14 March 2001 11:52
		Re: Time convertion By: Wayne Landsman on Wed, 14 March 2001 11:30
		Re: Time convertion By: Alex Schuster on Tue, 20 March 2001 06:04

Previous Topic:	AD&D site / sito AD&D
Next Topic:	Time convertion

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:46:49 PDT 2025

Total time taken to generate the page: 0.00530 seconds