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From: Mills@udel.edu
Newsgroups: comp.protocols.time.ntp
Subject: Re:  Multinet's NTP display & "where's" truechimer.cso?
Message-ID: <9103081747.aa24137@huey.udel.edu>
Date: 8 Mar 91 22:47:57 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: The Internet
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The truechimer.cso.uiuc.edu had a version-mismatch problem and has
been rewound.

See the man pages for the ntp.3.4 distribution for billboard 
interpretation. See the NTP version-2 spec (RFC-1119) for a description
of the reachability and dispersion variables. Reachability is shown 
in the billboard as an octal encoding of a shift register, with each
bit corresponding to a valid update message. Dispersion is a measure
of computed offset sample variance.

Dave