And in Japan, since the main transmitter for JJY is within the Fukushima evacuation zone, such watches have presumably been freerunning and accumulating errors without resets ever since the earthquake.
Fortunately (and uniquely) Japan has two time code transmitters; the one in NE Japan at 40 kHz and one in SW Japan at 60 kHz. Modern radio controlled clocks in Japan receive either frequency automatically. Even some RC clocks sold here (usually with the word "global" in them) are capable, if in range, of receiving either JJY station as well as WWVB and MSF and DCF in Europe. As they say, once you have receivers tuned for 40/60/77.5 kHz decoding the time code(s) is just a matter of software... Still, with one station down, I'm sure reception for many Japanese isn't as favorable as it once was. I'm waiting for confirmation of this or anecdotes by time nuts there. Right now they have bigger problems. Ironically the 40 kHz JJY station is only 10 miles from the power plant; no wonder they had to evacuate. I've looked at the raw data from JJY40 and you can see when the quake hit and a day later they had to shutdown and leave. There's a very nice per-hour animated map of average JJY signal strength here: http://jjy.nict.go.jp/fs/dis_contour_e.html I think this pair of graphs would make Edward Tufte proud. Anyway, thread is getting off-topic, so I'll leave it at that. /tvb http://www.cio.com.au/article/381374/nuclear_crisis_stopped_time_japan/ http://en.wikipedia.org/wiki/JJY http://maps.google.com/maps?q=37.372500,140.848889+(JJY40) http://maps.google.com/maps?q=37.316933,141.021713+(Daiichi) http://maps.google.com/maps?q=33.465556,130.175556+(JJY60) http://jjy.nict.go.jp/QandA/data/leapsec.pdf http://jjy.nict.go.jp/QandA/data/leapsec.html http://jjy.nict.go.jp/QandA/data/dut1.html _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
