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- From: shirriff@sprite.berkeley.edu (Ken Shirriff)
- Newsgroups: sci.crypt
- Subject: Re: Zimmermann's responses to Sidelnikov's
- Date: 23 Jan 1993 01:46:35 GMT
- Organization: University of California, Berkeley
- Lines: 21
- Message-ID: <1jq81r$8dn@agate.berkeley.edu>
- References: <1993Jan21.143916.22207@colnet.cmhnet.org> <1993Jan22.154035.20835@shearson.com>
- NNTP-Posting-Host: sassafras.berkeley.edu
-
- In article <1993Jan22.154035.20835@shearson.com> dmandl@shearson.com writes:
- >> DO 10 I=1.5
- >If I remember correctly, it was an error exactly like this that
- >blew up a U.S. rocket (complete with astronauts) back in the '70s.
-
- Well, no. This has been rehashed extensively in comp.risks. The unmanned
- Mariner I flight to Venus on July 22, 1962 went off course and was destroyed.
- The cause was a missing hyphen in the hand-written guidance equations,
- causing a faulty implementation. Coupled with a failure of the onboard
- rate system hardware, the computer processed the tracking data incorrectly,
- the rocket went off course and was destroyed by the range safety officer.
- Look in the comp.risks archives for extensive, referenced discussion of
- this.
-
- The period-for-comma story has been circulating for years in relation to
- this incident, but according to the discussion on comp.risks, the missing
- hyphen was the real story.
-
- Followups probably belong in alt.folklore.computers, or somewhere.
-
- Ken Shirriff shirriff@sprite.Berkeley.EDU
-