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Leap Seconds and JULDAY() [message #91399]

Wed, 08 July 2015 15:23

MarioIncandenza
Messages: 231
Registered: February 2005

Senior Member

Hello IDL wizards!

I have data timestamped with "seconds-since-epoch," in this case the epoch is 1/1/1993 00:00.

My results had been 8 seconds off, which I never noticed, but then last week, I started to have problems, and found my results were 9 seconds off.

My method is this:

EPOCH=JULDAY(1,1,1993,0,0,0)
SECONDS_IN_A_DAY = DOUBLE(24l*60*60)
TIMESTAMP_UTC = EPOCH + (EPOCH_SECONDS/SECONDS_IN_A_DAY)

This gives the wrong answer, because JULDAY() doesn't have epoch seconds. This makes me sad, though there may be some detailed reason why it shouldn't.

--Edward H.

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[Message index]

		Leap Seconds and JULDAY() By: MarioIncandenza on Wed, 08 July 2015 15:23
		Re: Leap Seconds and JULDAY() By: Craig Markwardt on Wed, 08 July 2015 16:35
		Re: Leap Seconds and JULDAY() By: natha on Thu, 09 July 2015 08:47

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