RFC 34 Prelimary Notes on the ARC Clock February 1970 location is written each time the accumulator is updated. As above the short-term accuracy will be about 10 to 20 microseconds and the long- term accuracy will be the equivalent of one second every 250 days. [ This RFC was put into machine readable form for entry ] [ into the online RFC archives by Katsunori Tanaka 1/98 ]