From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,d4801f5d6baa249d X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news3.google.com!news4.google.com!news.glorb.com!news.aset.psu.edu!not-for-mail From: "Bob Spooner" Newsgroups: comp.lang.ada Subject: Re: F-22 Raptor software problem Date: Wed, 28 Feb 2007 10:47:36 -0500 Organization: Penn State University, Center for Academic Computing Message-ID: References: <1172502110.098416.297700@q2g2000cwa.googlegroups.com> <1172635528.435013.151190@m58g2000cwm.googlegroups.com> NNTP-Posting-Host: nat3.arl.psu.edu X-Trace: f04n12.cac.psu.edu 1172677657 36288 128.118.40.78 (28 Feb 2007 15:47:37 GMT) X-Complaints-To: usenet@f04n12.cac.psu.edu NNTP-Posting-Date: Wed, 28 Feb 2007 15:47:37 +0000 (UTC) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3028 X-RFC2646: Format=Flowed; Original X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 Xref: g2news2.google.com comp.lang.ada:9600 Date: 2007-02-28T10:47:36-05:00 List-Id: "Aurele" wrote in message news:1172635528.435013.151190@m58g2000cwm.googlegroups.com... > On Feb 27, 9:33 am, "Bob Spooner" wrote: >> "Aurele" wrote in message >> >> news:1172502110.098416.297700@q2g2000cwa.googlegroups.com...> On Feb 26, >> 3:55 am, "Alex R. Mosteo" wrote: >> >> > Well, someone is likely to lose their job for improperly implementing >> > the geoid and/or datum model! >> >> I would be inclined to think that the (derived) requirements were >> incompletely specified and therefore didn't cover the case of what >> happens >> when the nav system, while using GPS signals for time, crosses the date >> line >> (or something like that.) -- Bob > > I'm sure its not a drived requirement. The international date line has > been there forever! Also, time is always measured wrt Greenwich time > in England. So, not a big deal. As Simon above said, it is probably > just a test case that fell through the cracks! Go to > http://wwp.greenwichmeantime.com/info/timezone.htm for more info on > Time Zones. > > p.s. "or something like that" has very little meaning! :-) > Well, the reason I think that it is a derived requirement is because if it were explicit in the contract, there would have to be traceability to both the code implementation and to the test that verified that it was implemented correctly. Bob