REAST Presentation Night - UTC and the Leap Second

We thank Peter Pokorny VK2EMR who will be taking us through a detailed look at the creation of Coordinated Universal Time and the need for Leap Seconds.

00:00:00 - Introduction Justin VK7TW
00:04:09 - WRC 15 was where the Leap Second issue became hot!
00:09:29 - International Earth Rotation Service IERS Reporting predicting leap seconds insertion
00:13:30 - GPS Leap Second Announcements - what is broadcast to users is UTC
00:17:00 - Leap Second chart - 2005 - 2020
00:18:40 - Earthquakes effects on earth rotation rate
00:19:45 - Ephemeris Time Scale (ET)
00:21:10 - Jump corrections to timescales
00:21:35 - Beginning of Coordinated Universal Time (UTC) from UT1 - 1959
00:24:43 - Types of "Universal Time" - UTC, DUT1, UTC(k), Terrestrial Time, TDB
00:26:50 - International Atomic Time
00:28:26 - UT0/1/2
00:29:20 - GPS Time
00:30:20 - SI Second Definition
00:31:25 - Solar Influences Data Analysis Center (SIDC)
00:31:55 - Responsibility for time - organisations
00:34:00 - Chart of all the organisations associated with time!
00:37:30 - BIPM Offices
00:37:58 - BIPM & IERS Responsibilities
00:39:55 - CIPM Committee
00:40:53 - IAU Responsibilities
00:41:26 - URSI & Leap Seconds
00:41:55 - Torino Colloquium (2003)
00:43:16 - IAU Working Group (2014)
00:44:00 - Early Radio Time Signals
00:45:15 - ITU Sectors
00:46:06 - Recalling RA-12 and WRC-12 - many administrations didn't know about leap seconds!
00:48:44 - Recalling WRC-15 (Agenda item 1.14)
00:50:45 - Changes made to the Radio Regulations
00:52:33 - Methods presented A, A1, A2, B, C, C1, C2
00:54:13 - Statements on adopting the Greenwich Meridian
00:56:09 - Recommendation ITU-R TF.460-6 Tolerance - IERS use these tolerances
00:57:25 - UTC between 1961 and 1972
01:01:35 - Offsets and step adjustment of UTC
01:04:22 - IERS Bulletin C & D
01:05:35 - ITU-R Publications
01:07:45 - Redefining the SI second (collection of standards) and Geodesy
01:11:00 - Atomic Clock Ensemble in Space (ACES)
01:12:00 - Pharao & Deep Space Atomic Clock
01:13:14 - Not all users are the same!
01:13:57 - Astronomical Communities
01:14:30 - Time related standards include
01:16:48 - Current Situation
01:17:15 - Can a decision be made in 2023?
01:25:37 - Summary final comment
01:26:00 - Thanks you from Peter and his Sextant and Qantas Clock in Canberra Airport.
01:27:10 - Questions and Answers
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