http://www.boulder.nist.gov/timefreq/stations/wwvb.htm

The link above has information on it. Really, when you look at how simple the format is, you wonder why all of a sudden all these atomic clocks are around:P

Anyway, I was wondering if anyone knew how to make a simple reciver for this? Small as posable and simple as posable. I KNOW its posable, as my little Casio wrist watch uses this service and the thing weighs 4 oz:P

I mean, while I am not a radio man, this descrption looks like moorse code in a way.

Here is a snipit from the web site:

WWVB continuously broadcasts time and frequency signals at 60 kHz. The carrier frequency provides a stable frequency reference traceable to the national standard. There are no voice announcements on the station, but a time code is synchronized with the 60 kHz carrier and is broadcast continuously at a rate of 1 bit per second using pulse width modulation. The carrier power is reduced and restored to produce the time code bits. The carrier power is reduced 10 dB at the start of each second, so that the leading edge of every negative going pulse is on time. Full power is restored 0.2 s later for a binary “0”, 0.5 s later for a binary “1”, or 0.8 s later to convey a position marker. The binary coded decimal (BCD) format is used so that binary digits are combined to represent decimal numbers.