Article View: sci.astro
Article #3620Re: Planetary Ephemeris Routines?
From: Husfeld, Dirk
Date: Mon, 25 Jan 1993 20:17
Date: Mon, 25 Jan 1993 20:17
29 lines
1976 bytes
1976 bytes
In <1993Jan22.182648.7390@zia.aoc.nrao.edu> cflatter@nrao.edu writes: > In article 1729@ryn.mro4.dec.com, randolph@est.enet.dec.com (Tom Randolph) writes: > > > >In article <3190@tymix.Tymnet.COM>, kopfj@bert.Tymnet.COM (John Kopf, X6305) writes... > >>I suspect that a FAQ describing common algorithms in ALGEBRA (rather than in a > >>particular computer language) would be welcome by many...I really hate the common > >>practice of displaying programs in BASIC, as it is most difficult to transcribe to > >>some other language. > >> > >>A discussion of "precision" would also be useful for those of us who are not > >>numerical analysts. > >> > >>JK > > > >This would quickly expand to occupy megabytes, which I imagine is why no one > >ever posts it here. There's really no way to give it proper treatment without a > >whole book's worth of formulae... hence the book references. "Astronomical > >Algorithms" by Meeus is excellent. > > Unfortunately his discussion of numerical precision is very outdated. Almost > anything you are likely to have on your desk these days will maintain much > better precision than Meeus would lead you to believe (most machines will > only lose one bit of precision in subtraction no matter how close the numbers > being subtracted for example). > > Chris Flatters > cflatter@nrao.edu >
Technical Details
Message-ID:
<1993Jan25.201723.10761@news.lrz-muenchen.de>Path:
arc1-ca.pugleaf.net!sparky!uunet!math.fu-berlin.de!informatik.tu-muenchen.de!lrz-muenchen.de!newsReferences:
<1993Jan21.190232.1729@ryn.mro4.dec.com> <1993Jan22.182648.7390@zia.aoc.nrao.edu>Show Full Headers
Complete Article Headers
Newsgroups: sci.astro Path: arc1-ca.pugleaf.net!sparky!uunet!math.fu-berlin.de!informatik.tu-muenchen.de!lrz-muenchen.de!news From: HUSFELD@usmv01.usm.uni-muenchen.de (Husfeld, Dirk) Subject: Re: Planetary Ephemeris Routines? In-Reply-To: cflatter@nrao.edu's message of Fri, 22 Jan 93 18: 26:48 GMT Message-ID: <1993Jan25.201723.10761@news.lrz-muenchen.de> Sender: news@news.lrz-muenchen.de (Mr. News) Organization: University Observatory Munich, FRG References: <1993Jan21.190232.1729@ryn.mro4.dec.com> <1993Jan22.182648.7390@zia.aoc.nrao.edu> Date: Mon, 25 Jan 1993 20:17:23 GMT X-News-Reader: VMS NEWS 1.20 Lines: 29