tholmes at woh.rr.com said: > Hanging bridge? What is it; where is it found; and how does it form? Tom Clark and Rick Hambly: Timing for VLBI http://gpstime.com/files/tow-time2009.pdf tvb: Motorola GPS M12+ Sawtooth http://www.leapsecond.com/pages/m12/sawtooth.htm -- These are my opinions. I hate spam.