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SonotaCo Site Admin
登録日: 2004.08.07 記事: 12671 所在地: 139.67E 35.65N
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日時: Thu Jul 05, 2012 7:50 am 記事の件名: Leap Second updated 20120701 |
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For all UFOAnalyzerV2, UFOOrbitV2 users
A leap second was added to UTC at 1/july/2012.
Here is latest leap second adjustment file (UFOx_LSec.csv) for UFO series.
Please replace same name file in UA2 and UO2 directory.
説明: |
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ファイル名: |
UFOx_LSec.csv |
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771 Bytes |
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624 回 |
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William Stewart
登録日: 2010.08.11 記事: 13
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日時: Tue Oct 30, 2012 5:08 pm 記事の件名: |
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Dear SonotaCo,
I have a question about the use of this updated file.
I have replaced the original "UFOx_LSec" file with the updated one in both UFO Analyser and UFO Orbit. In the event that I am analysing data that was acquired before 01st July 2012, do I need to replace the new "UFOx_LSec" file with the original one?
Or is it the case that both UFO Analyser and UFO Orbit take account of the data acquisition date and apply the appropriate correction from the new "UFOx_LSec" file?
Thanks in advance
William
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SonotaCo Site Admin
登録日: 2004.08.07 記事: 12671 所在地: 139.67E 35.65N
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日時: Tue Oct 30, 2012 6:13 pm 記事の件名: |
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William Stewart wrote: | I have replaced the original "UFOx_LSec" file with the updated one in both UFO Analyser and UFO Orbit. In the event that I am analysing data that was acquired before 01st July 2012, do I need to replace the new "UFOx_LSec" file with the original one?
Or is it the case that both UFO Analyser and UFO Orbit take account of the data acquisition date and apply the appropriate correction from the new "UFOx_LSec" file |
UFOAnalyzer and UFOOrbit compute a sidereal time of each event using corresponding records of UFOx_LSec table.
So the addition of this July 1st should be used for events after July 1st only.
But UFOx_LSec was not updated for almost two years, so it was added 4 or 5 new records(interpolating on every half year).
therefore it should be used for all event after 2010, for the purpose that requires less than one second of time accuracy.
Well, this leap second treatment of "below one second" is very special process of UFO series.
Even NASA's SPICE software library does not cares this. .
So please not be too sensitive.
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William Stewart
登録日: 2010.08.11 記事: 13
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日時: Wed Oct 31, 2012 12:46 am 記事の件名: |
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Hi SonotaCo,
Many thanks for your prompt reply and for your clarification. A colleague and I perform dual station orbit determination work so we will take this into account.
Best regards
William
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SonotaCo Site Admin
登録日: 2004.08.07 記事: 12671 所在地: 139.67E 35.65N
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日時: Wed Jul 01, 2015 7:40 am 記事の件名: 2015/07/01 |
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Leap seconds adjustment file was updated for the 2015/07/01 leap second insertion.
Download UFOx_LSec.csv from below, and replace all same name files in your system by it.
http://sonotaco.com/soft/download/UFOx_LSec.csv
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