Hi, For those who missed it - IS-GPS-200 has been updated a few months ago. https://www.gps.gov/technical/icwg/IS-GPS-200J.pdf Leo Bodnar

Thanks Leo. For you low level time nerds, yes, even DoD can't get GPS time / UTC / UT1 / leap seconds right the first time. Synchronizing 3 time scales across a leap second discontinuity is really, really hard. More info about ICD rev-J here: https://www.gps.gov/technical/icwg/meetings/2018/PIRN-IS-200J-001.pdf "RFC Title: 2018 Proposed Changes to the Public Documents" or search for RFC 374 here (page 67/117): https://www.gps.gov/technical/icwg/meetings/2017/presentation.pdf "Global Positioning Systems (GPS) Public Interface Control Working Group and Public Forum" /tvb ----- Original Message ----- From: "Leo Bodnar" <leo@leobodnar.com> To: <time-nuts@lists.febo.com> Sent: Monday, July 30, 2018 12:58 PM Subject: [time-nuts] New GPS Interface Specification IS-GPS-200J is out > Hi, > > For those who missed it - IS-GPS-200 has been updated a few months ago. > > https://www.gps.gov/technical/icwg/IS-GPS-200J.pdf > > Leo Bodnar