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Re: DPCC Time stamp from FITS header

Posted by karenacollins on Aug 09, 2018; 7:28pm
URL: http://astroimagej.170.s1.nabble.com/DPCC-Time-stamp-from-FITS-header-tp1031p1034.html

Hi Mark,

If the GPSSTART time is expected to be more precise than the source currently used for DATE-OBS, I would recommend copying the GPSSTART time into the DATE-OBS time in the header for maximum compatibility with all tools, if that is possible for your software developers to implement. If not, I can look at adding the GPSSTART time as a keyword used by AIJ, but at the moment I will not be able to implement a user selection, so I would need to understand the order that GPSSTART should be searched relative to DATE-OBS (for in the sequential search of several keywords by AIJ).

Karen

On 8/5/2018 4:05 AM, Mark Salisbury [via AstroImageJ] wrote:
Many thanks for the very quick response Karen.

I would just want to check with the software developers for the telescope that the FITS keywords are not going to change at all before you do any work.

Currently the FITS headers use DATE-OBS for the date and time.  The GPSSTART field uses the same format, example below.

32 DATE-OBS '2018-08-02T00:54:43.0112279' S
36 GPSEND '2018-08-02T00:56:45.9334801' S
37 GPSSTART '2018-08-02T00:54:45.9325047' S

Regards

Mark



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