{"id":13893,"date":"2015-07-01T12:36:08","date_gmt":"2015-07-01T16:36:08","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=13893"},"modified":"2015-07-01T16:23:05","modified_gmt":"2015-07-01T20:23:05","slug":"recording-the-2015-leap-second","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2015\/07\/recording-the-2015-leap-second\/","title":{"rendered":"Recording the 2015 Leap Second"},"content":{"rendered":"

\"Fullscreen<\/a><\/p>\n

Yesterday, I posted a brief article about the leap second<\/a> that occurred between 23:59:59 June 30, 2015\u00a0and 00:00:00 UTC July 01, 2015.<\/p>\n

I decided to record the leap second on as many shortwave time station frequencies as possible. The only viable options for me–based on time of day and my reception location–were the WWV frequencies 10, 15, 20, and 25 MHz,\u00a0and CHU frequencies 7,850 and 14,670 kHz.<\/p>\n

\"I<\/a>

I was able to monitor four different time station frequencies simultaneously on the TitanSDR Pro. (click to enlarge)<\/p><\/div>\n

Unfortunately, HF propagation was very<\/em> poor yesterday, so the higher WWV frequencies–20 and 25 MHz–were completely inaudible, as was CHU on 14,670 kHz. There were\u00a0numerous thunderstorms in our\u00a0area, so static crashes were prevalent.<\/p>\n

Still, since this was a\u00a0first\u00a0attempt\u00a0to record a “leap second,” I didn’t want to take any chances. \u00a0I had the Titan SDR Pro<\/a> monitoring and recording two CHU and two WWV frequencies [screenshot<\/a>], the Elad FDM-S2<\/a> recording WWV on 15 MHz [screenshot<\/a>], and the WinRadio Excalibur<\/a> on WWV’s 10 MHz frequency, as well as\u00a0recording the whole 31 meter band spectrum [screenshot<\/a>].<\/p>\n

In the end, the strongest frequencies I captured were CHU on 7,850 kHz and WWV on 15,000 kHz. WWV on 10,000 kHz was much weaker than normal and the band was quite noisy–still, it’s readable, so I included this recording, too. Recordings follow…<\/p>\n

Recordings<\/h2>\n
\"Photo<\/a>

The sign above WWV’s primary 10 MHz transmitter (2014).<\/p><\/div>\n

All of the recordings start just before the announcement of 23:59 UTC.<\/p>\n

WWV added the extra second and higher tone, then continued with their top of the hour announcements, including a note about leap second (which begins\u00a0after the 00:04 announcement). CHU simply injects a one second silence before the long tone.<\/p>\n

WWV on 15,000 kHz<\/a>\u00a0using the Elad FDM-S2:<\/p>\nhttps:\/\/archive.org\/download\/WWVLeapSecond15000kHz201506302FDMS2CLIP\/WWV-LeapSecond-15000kHz-2015_06_30-2-FDMS2-CLIP.mp3<\/a><\/audio>\n

CHU on 7,850 kHz<\/a>\u00a0using the TitanSDR Pro:<\/p>\nhttps:\/\/archive.org\/download\/WWVLeapSecond15000kHz201506302FDMS2CLIP\/CHU-LeapSecond-2015-06-30_23'46'35_0-CLIP.mp3<\/a><\/audio>\n

WWV on 10,000 kHz<\/a> using the WinRadio Excalibur:<\/p>\nhttps:\/\/archive.org\/download\/WWVLeapSecond15000kHz201506302FDMS2CLIP\/WWV-LeapSecond-10MHz-30JUNE2015-WinRadExcal.mp3<\/a><\/audio>\n

One interesting note about the 10 MHz WWV recording above: I believe I may be hearing BPM China in the background. I’m curious if anyone can confirm this because I don’t know BPM’s cadence\/pattern well enough to ID it.<\/p>\n

Other recordings…?<\/h2>\n

Did you record a shortwave time station as\u00a0leap second happened? If so, please comment,\u00a0and feel free to share\u00a0a link to your recording!<\/p>\n","protected":false},"excerpt":{"rendered":"

Yesterday, I posted a brief article about the leap second that occurred between 23:59:59 June 30, 2015\u00a0and 00:00:00 UTC July 01, 2015. I decided to record the leap second on as many shortwave time station frequencies as possible. The only viable options for me–based on time of day and my reception location–were the WWV frequencies […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[56,81,3,746,43,1167],"tags":[3944,3940,3942,13,3941,3945,3943,34,3939,1714,68,426],"class_list":["post-13893","post","type-post","status-publish","format-standard","hentry","category-broadcasters","category-current-events","category-news","category-recordings","category-shortwave-radio","category-whats-on-shortwave","tag-2015-leap-second","tag-bpm-china","tag-bsf-taiwan","tag-chu","tag-hla-south-korea","tag-leap-second","tag-matthew-deutch","tag-shortwave","tag-shortwave-radio-time-stations","tag-time-stations","tag-wwv","tag-wwvh"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-3C5","jetpack-related-posts":[{"id":13874,"url":"https:\/\/swling.com\/blog\/2015\/06\/hang-on-a-second-seriously\/","url_meta":{"origin":13893,"position":0},"title":"Hang on a second…seriously","author":"Thomas","date":"June 30, 2015","format":false,"excerpt":"Tonight, for the first time in three years, we will experience a leap second. What is a leap second? \u00a0Wikipedia provides\u00a0a concise explanation: A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC) in order to keep its time of day close to the\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"WWV-TimeCodeGenerator","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":23079,"url":"https:\/\/swling.com\/blog\/2016\/12\/leap-second-added-to-2016\/","url_meta":{"origin":13893,"position":1},"title":"Leap second added to 2016","author":"Thomas","date":"December 30, 2016","format":false,"excerpt":"(Source: NPR) Here's a timely reminder for all you would-be revelers out there: Be careful with your countdowns this New Year's Eve. There will be a little extra time to bask in the glow of a retreating 2016 \u2014 or curse its name, as the case may be. Whatever your\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":977,"url":"https:\/\/swling.com\/blog\/2010\/12\/at-the-tone-a-history-of-wwv-in-audio\/","url_meta":{"origin":13893,"position":2},"title":"“At The Tone”–A history of WWV in audio","author":"Thomas","date":"December 14, 2010","format":false,"excerpt":"If shortwave radio has a pulse, it is the constant beat of the WWV and WWVH time stations. Some of the first memories I have of hearing shortwave radio are of my father tuning in WWV each Sunday morning (on his RCA 6K3), to set his watch. Had this not\u2026","rel":"","context":"In "Reviews"","block_context":{"text":"Reviews","link":"https:\/\/swling.com\/blog\/category\/reviews\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/images\/WWVSM250.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":52730,"url":"https:\/\/swling.com\/blog\/2022\/05\/jock-explores-the-world-of-time-stations-and-beacons\/","url_meta":{"origin":13893,"position":3},"title":"Jock says, “It\u2019s about time…and beacons!”","author":"Thomas","date":"May 15, 2022","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor,\u00a0Jock Elliott, who shares the following guest post: It\u2019s about time . . . and beacons By Jock Elliott, KB2GOM Shortwave time stations can be incredibly useful for shortwave listeners, not just for checking the time, but also for finding out what\u2019s going on with radio signal\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/05\/IBPLocations.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/05\/IBPLocations.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/05\/IBPLocations.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/05\/IBPLocations.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":24303,"url":"https:\/\/swling.com\/blog\/2017\/02\/wwv-scheduled-broadcast-outage-february-21-22\/","url_meta":{"origin":13893,"position":4},"title":"WWV Scheduled Broadcast Outage February 21 & 22","author":"Thomas","date":"February 19, 2017","format":false,"excerpt":"(Source: WWV) NOTICE OF SCHEDULED BROADCAST OUTAGE: Due to an electrical upgrade, Radio Station WWV will be off the air on all frequencies on February 21 and 22, 2017. The outages will occur between 7:00 AM and 5:00 PM Mountain Standard Time, and will not exceed 8 hours\u00a0duration each day.\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/06\/WWV-TimeCodeGenerator-1024x582.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":41744,"url":"https:\/\/swling.com\/blog\/2020\/01\/washington-post-features-wwv-and-wwvb\/","url_meta":{"origin":13893,"position":5},"title":"Washington Post features WWV and WWVB","author":"Thomas","date":"January 26, 2020","format":false,"excerpt":"(Source: Washington Post via Ulis K3LU) If you tune a shortwave radio to 2.5, 5, 10 or 15 MHz, you can hear a little part of radio history \u2014 and the output of some of the most accurate time devices on Earth. 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