Chuck Mayfield wrote: > Wait! WWV and WWVB transmit UTC time codes. There is absolutely no > way for either station to 'know' in which time zone your atomic clock > is located. So .... How could they correct time for DST??? > > Enlighten me please
The WWVB signals include indicator bits for DST. These indicators can be used to determine whether DST is currently in effect, and whether DST transition is to occur within the current UTC day. See pages 19 through 21: http://tf.nist.gov/timefreq/general/pdf/1383.pdf So they don't correct for DST, but they provide enough information so that your clock can. The correction is a user-selectable option in most clocks. I have two WWVB clocks, one is set to display UTC without DST correction, and the other is set to display Eastern time with DST correction. -- 73 de Nick N2QZ Section Traffic Manager, Eastern New York Section Net Manager, NYS/E FISTS #11469 SKCC #1027
