comp.lang.idl-pvwave archive: archive » Re: convert from Julian date to calendar date and vice verse

Home » Public Forums » archive » Re: convert from Julian date to calendar date and vice verse

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

Re: convert from Julian date to calendar date and vice verse [message #80718]

Wed, 04 July 2012 08:19

wlandsman
Messages: 743
Registered: June 2000

Senior Member

Stefan, Sorry I misinterpreted your post. You didn't say that daycnv.pro had the wrong zero point, but that numbers given by the OP were not Julian dates since they had the wrong zero point.

Khaled, to convert your numbers to Julian day you need to add JULDAY(1,1,1) = 1721424 to all your dates. But are you sure that your numbers are not *hours* rather than days since 1-1-1? If it is days then they refer to a year far in the future, but if they are hours then they refer to the year 2012.

--Wayne

On Tuesday, July 3, 2012 7:15:44 PM UTC-4, wlandsman wrote:
> My posts from a few hours ago don't seem to have shown up -- sorry if they appear twice
>
> daycnv.pro does not have the wrong zero point. It converts to Gregorian (not Julian) calendar day, and JD 0.0 corresponds to November 24 4713 BC in the Gregorian calendar.
>
> ( e.g. http://www.hermetic.ch/cal_stud/jdn.htm#comp ). Cheers, --Wayne
>

Report message to a moderator

[Message index]

		Re: convert from Julian date to calendar date and vice verse By: wlandsman on Wed, 04 July 2012 08:19
		Re: convert from Julian date to calendar date and vice verse By: wlandsman on Tue, 03 July 2012 16:15
		Re: convert from Julian date to calendar date and vice verse By: stefan.meingast on Tue, 03 July 2012 03:32
		Re: convert from Julian date to calendar date and vice verse By: Andy Sayer on Mon, 02 July 2012 11:04

Previous Topic:	Re: vectors on map-- partvelvec?
Next Topic:	Re: Upgrade IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Nov 29 07:40:54 PST 2025

Total time taken to generate the page: 0.47878 seconds