> Probably the way to go. > The less accurate clock can be a TCXO or VCXO phase locked to the 1 PPS > WWVB > signal. > Being phase locked means it IS going to oscillate around the 1 PPS signal. Don't lock to the 1PPS signal, lock to the carrier. WWVB carrier is _very_ accurate. Bob Ammerman RAm Systems > For your accurate clock, it is going to oscillate around some temperature > setting of it's own unless you are going to run it on some sort of forced > temperature ramp. > you will have to post process, either way. > > ----- > If going for the steady temperature idea, a tub of ice-water may help in > holding temperature control if you make your control temperature = 0 > celcius > Stick a radiator in the tub of water to control the ratio of ice to water. > > ...going back to the 10 meter long pole idea. > Have you thought about changing the pole to a large 10 meter spring idea > mounted in a fridge. large weight with a mirror. Temperature should add > rotation, Gravity should add lean or lift. > _______________________________________________ > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist