Hal, > The NIST web page is here: > http://www.nist.gov/physlab/div847/grp40/wwvb.cfm [and the iers page and the historic leap second list, in a subsequent message.] > I assume you can find the fine print there, but they probably aren't easily > machine readable.
Yes, sure, I know about those resources. You're right, they're meant for eyeballs, not code. I remember seeing the IERS bulletin taped to the wall at WWVH the first time I visited, back in the late 80s or maybe early 90s. Back then, someone had to drive out to the site on the UTC day before a leap second (typically new year's eve) and flip a toggle switch to insert the :60. And then (harder, given parties and hangovers) the next day to prevent another from happening the next UTC midnight (2PM Hawaiian time). I did a bit more digging on the NIST site, and it appears that you can get the Leap info, DST-pending info and DUT1 (current but not pending) info via ACTS, the modem dialup service. But none of the internet services include those. There is a site name "acts.nist.gov" in the DNS, but nothing responds on any of the usual ports. So maybe they intend to work on this issue. > The NTP package includes a utility to generate the audio for WWV. > It's util/tg2.c in any recent NTP source package. Yup. Only tg.c in the production release, but tg2.c is in the development tarball -- hadn't seen the improved version. It looks like it does a good job on the IRIG and IEEE stuff. But the WWV / WWVH is kinda minimal. It says it is intended to test the detector code, but doesn't include the 500, 600 and 440 Hz tones, which it ought to for a proper test. Also, no double ticks for the DUT1, and no voice announcements. My own tcg code does all that, and adjusts for WWV vs WWVH tone schedule and tick frequency. (Not ready to release to the world, though. I should think about that.) This was written back when the RFP went out for the current generators to replace the Audichron drum announcers and add the new code stuff. I built a prototype, then decided it was nuts to submit an actual proposal. Tnx again & 73, Bob, K1BC _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
