Below is a high resolution snapshot of the WWVB subcode during the leap second at the end of 1998.
From: Tom Van Baak <tvb veritas.com> Subject: Leap Second, WWVB Date: 1999/01/03 Message-ID: <368F6319.4F21@veritas.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii Organization: VERITAS Software Mime-Version: 1.0 Reply-To: tvb veritas.com Newsgroups: comp.protocols.time.ntp Following are two transcripts of WWVB during the leap second. The first was made with the new UltraLink M320 (http://www.ulio.com/timepr.html) in diagnostic mode with data logged on a PC running local time (PST). '0' = zero bit, '1' = one bit, '2' = position marker. 1998-12-31.15:53/101000112001000011200110011000101000102001101001210000010022 1998-12-31.15:54/101001002001000011200110011020101000102001101001210000010012 1998-12-31.15:55/noise... 1998-12-31.15:58/101010002001000011200110011020101000102001101001210000010022 1998-12-31.15:59/1010100120010000112001100110201010001020011010012100000100222 1998-12-31.16:00/000000002000000000200000000020001001012011101001210010000022 1998-12-31.16:01/000000012000000000200000000020001001012011101001210010000022 1998-12-31.16:02/000000102000000000200000000020001001012011101001210010000022 1998-12-31.16:03/000000112000000000200000000020001001012011101001210010000022 The second transcript is the 1 Hz WWVB subcode received with a laboratory receiver and synchronously decoded by an A/D every 20 ms (50 samples per second, one line per second). 'X' = full power, '-' = reduced power. 1998-12-31.23:58:59/X----------------------------------------XXXXXXXXX 1998-12-31.23:59:00/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:01/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:02/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:03/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:04/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:05/X-------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:06/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:07/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:08/X-------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:09/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:10/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:11/------------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:12/---------------------------XXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:13/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:14/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:15/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:16/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:17/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:18/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:19/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:20/------------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:21/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:22/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:23/---------------------------XXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:24/------------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:25/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:26/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:27/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:28/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:29/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:30/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:31/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:32/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:33/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:34/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:35/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:36/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:37/X-------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:38/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:39/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:40/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:41/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:42/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:43/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:44/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:45/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:46/X----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:47/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:48/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:49/----------------------------------------XXXXXXXXXX 1998-12-31.23:59:50/-------------------------XXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:51/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:52/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:53/------------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:54/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:55/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:56/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:57/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:58/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1998-12-31.23:59:59/-----------------------------------------XXXXXXXXX 1998-12-31.23:59:60/-----------------------------------------XXXXXXXXX 1999-01-01.00:00:00/-----------------------------------------XXXXXXXXX 1999-01-01.00:00:01/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:02/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:03/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:04/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:05/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:06/-------------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:07/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:08/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:09/----------------------------------------XXXXXXXXXX 1999-01-01.00:00:10/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:11/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:12/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:13/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:14/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:15/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:16/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:17/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:18/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:19/-----------------------------------------XXXXXXXXX 1999-01-01.00:00:20/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:21/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:22/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:23/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:24/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:25/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:26/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:27/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:28/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:29/-----------------------------------------XXXXXXXXX 1999-01-01.00:00:30/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:31/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:32/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:33/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:34/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:35/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:36/---------------------------XXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:37/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:38/--------------------------XXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:39/----------------------------------------XXXXXXXXX- 1999-01-01.00:00:40/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:41/--------------------------XXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:42/--------------------------XXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:43/-------------------------XXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:44/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:45/---------------------------XXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:46/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:47/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:48/--------------------------XXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:49/-----------------------------------------XXXXXXXXX 1999-01-01.00:00:50/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:51/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:52/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:53/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:54/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:55/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:56/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:57/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:00:58/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:00:59/------------------------------------------XXXXXXX- 1999-01-01.00:01:00/-----------------------------------------XXXXXXXX- 1999-01-01.00:01:01/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:02/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:03/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:04/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX-XXXX- 1999-01-01.00:01:05/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:06/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:07/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:08/--------------------------XXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:09/------------------------------------------XXXXXXXX 1999-01-01.00:01:10/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:11/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:12/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:13/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:14/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:15/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:16/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:17/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:18/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:19/-----------------------------------------XXXXXXXX- 1999-01-01.00:01:20/----------XXXXXXXXXXXXXXXXXXXXXX-XXXXXXXXXXXXXXXX- 1999-01-01.00:01:21/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:22/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:23/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:24/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:25/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:26/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:27/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:28/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:29/-----------------------------------------XXXXXXXX- 1999-01-01.00:01:30/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:31/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:32/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:33/--------------------------XXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:34/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:35/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:36/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:37/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:38/--------------------------XXX-XXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:39/----------------------------------------XXXXXXXXX- 1999-01-01.00:01:40/-----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:41/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:42/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:43/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:44/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1999-01-01.00:01:45/-------------------------XXXXXXXXXXXXXXXXXXXXXXX-- 1999-01-01.00:01:46/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:47/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:48/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:49/----------------------------------------XXXXXXXXX- 1999-01-01.00:01:50/-------------------------XXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:51/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:52/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:53/------------------------XXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:54/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:55/---------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:56/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:57/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:58/----------XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX- 1999-01-01.00:01:59/---------------------------------------XXXXXXXXX-- 1999-01-01.00:02:00/----------------------------------------XXXXXXXXX- |
The above was an old posting of mine found in the Google Usenet archives.