>Message: 1 >Date: Mon, 4 Nov 2013 18:42:57 -0800 >From: Guy Harris <[email protected]> >To: Developer support list for Wireshark <[email protected]> >Subject: Re: [Wireshark-dev] adding IRIG time and time of day >Message-ID: <[email protected]> >Content-Type: text/plain; charset=iso-8859-1 > > >On Nov 1, 2013, at 1:39 PM, John Dill <[email protected]> wrote: > >> The timestamp is populated with a time of day starting with day 1 as Jan 1 >> 12:00:00am and wraps around at >>either day 365 or 366 which corresponds to >> Dec 31, 11:59:59pm. One slight issue is that the IRIG time does >>not >> capture the year, > >According to IRIG Standard 200-04 "IRIG SERIAL TIME CODE FORMATS": > >https://wsmrc2vger.wsmr.army.mil/rcc/manuals/200-04/TT-45.pdf ><https://www.greenfieldeng.com/exchweb/bin/redir.asp?URL=https://wsmrc2vger.wsmr.army.mil/rcc/manuals/200-04/TT-45.pdf> > > >"IRIG Standard 200-98 was last updated in May 1998 and defined the >characteristics of the serial time codes >A, B, D, E, G, and H This 2004 >edition of the Standard incorporates year information for codes A, B, E, and >G. >Codes D and H remain unchanged." > >So which IRIG time stamp are we talking about, and are we talking about the >1998 edition, in which there's >apparently no year information, or the 2004 >edition, in which there is year information? The IRIG Time Code Generator used is from ITS (GPS/IRIG B Time Code Generator/Reader, Model 6115G), and it outputs an IRIG-B time code signal which does not have the year embedded in it, so it's pre-2004 standard.
>> so some method will be needed to specify whether the date the leap year. I >> could use a heuristic like the >>date from the file, or use Ctrl + Alt + 8 >> to cycle between leap year and non-leap year displays. >> >> The data is not collected from Wireshark directly, but from an external >> board that uses a modified pcap driver >>(cpcap) that I use to stream >> collected packets to file. > >So are we talking about a board such as > >http://defense.ge-ip.com/products/cnic-a2pu4/p3437 ><https://www.greenfieldeng.com/exchweb/bin/redir.asp?URL=http://defense.ge-ip.com/products/cnic-a2pu4/p3437> > > >for which that page says "An IRIG-B receiver/generator is included for >synchronization to external IRIG-B time >sources and for synchronizing >multiple CNIC-A boards." We have a CNIC-A2P3 board installed in a Compact PCI chassis. http://defense.ge-ip.com/products/cnic-a2p3/p1046 I built the instrumentation package when it was still Condor Engineering around the 2007-08 timeframe. Best regards, John D.
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