Guys,

You might find one or more of these interesting:

A proposal on adapting the NTP interleaved protocol to the Proximity-1
protocol used by Mars orbiters and rovers:
http://www.eecis.udel.edu/~mills/proximity.html

An update of the NTP interleaved protocol white paper:
http://www.eecis.udel.edu/~mills/onwire.html

An updated briefing on the interleaved protocols for both NTP and
Proximity-1:
http://www.eecis.udel.edu/~mills/dat...ief/onwire.ppt

Dave