The OP did not state a preferrence for TAI over UTC.
The OP _did_ repeat the old misguided "all I care about is
synchronization" meme about NTP. This is frequently uttered by people
who want to operate a stable time island and want to have it for free.
NTP needs a stable time base / frequency reference / what ever you
want to call it to achieve the best possible clock stability. Without
one your clocks are like a herd of kittens playing follow the leader.
UTC is ubiquitous and cheap. A stand alone rubidium based PPS source
will cost you at least $1K + the cost of integration.
Steve Kostecke < XXXX@XXXXX.COM >
NTP Public Services Project - http://www.yqcomputer.com/