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Re: Conversion of MS 64bit timestamps to JD [message #93865 is a reply to message #93861]

Sat, 12 November 2016 15:25

andrewcool777
Messages: 27
Registered: November 2012

Junior Member

Hi Dick,

This is Gold Star stuff! Maybe even an Elephant stamp too.

Of course, having the ability to record 100nanosecond intervals assunes that the Windows clock is up to that int eh first place, and well calibrated, but that's another story.

A friend and I recorded and occultation by the Centaur asteroid Chariklo
on Oct 1st, using SER format. I've written a converter to get individual FITS
files from the SER file, but it needs those 64bit timestamps converted too.

Many Thanks.

Andrew

Working the other way, to turn serDateTime into six parameters:

IDL> serDateTime = 636144921840000001 ; 2016-11-11T20:16:24.0000001 from above

IDL> Jul2Greg,(serDateTime / (24LL * 60 * 60 * 10000000)) + Greg2Jul(1,1,1,0,0,0),mo,d,y
IDL> increments = serDateTime MOD (10000000LL * 24 * 60 * 60)
IDL> s = increments MOD (10000000LL * 60) / 1D7
IDL> m = increments / (10000000LL * 60) MOD 60
IDL> h = increments / (10000000LL * 60 * 60)

This seems to have worked:

IDL> help,y,mo,d,h,m
Y LONG = 2016
MO LONG = 11
D LONG = 11
H LONG64 = 20
M LONG64 = 16

> Andrew

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[Message index]

		Conversion of MS 64bit timestamps to JD By: andrewcool777 on Thu, 10 November 2016 18:23
		Re: Conversion of MS 64bit timestamps to JD By: Dick Jackson on Fri, 11 November 2016 18:35
		Re: Conversion of MS 64bit timestamps to JD By: andrewcool777 on Sat, 12 November 2016 15:25
		Re: Conversion of MS 64bit timestamps to JD By: andrewcool777 on Sun, 13 November 2016 03:48
		Re: Conversion of MS 64bit timestamps to JD By: Dick Jackson on Mon, 14 November 2016 08:09

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