The Air Force Second Space Operations Squadron (2 SOPS) has issued an Initial Use (USABINIT) NANU for SVN-74, the first of the new generation of GPS-III satellites. SVN-74 was launched on 23 December of 2018, JDAY 357 2018, and, having successfully undergone rigorous operational testing on orbit, SVN-74/PRN-04 has taken its place backing up SVN-68/PRN-9 at F3 in the active GPS constellation.   NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2020004 SUBJ: SVN74 (PRN04) USABLE JDAY 013/1734 NANU […]

All CGSIC, Recap of the 59th meeting of the U.S. Civil GPS Service Interface Committee The 59th meeting of the U.S. Civil GPS Service Interface Committee was held September 16-17, 2019, at the Hyatt Regency Miami hotel in Miami, FL in conjunction with the Institute of Navigation’s Global Navigation Satellite System (GNSS)+ conference. For readers who were unable to attend, a synopsis of the meeting is provided below. The full agenda and presentations are available for download from the […]

  GPS III Ground System Operations Contingency Program Nearing Operational Acceptance SMC Public Affairs / Published October 22, 2019 LOS ANGELES AIR FORCE BASE, Calif. -- The Global Positioning System enterprise reached another major milestone on Oct. 21, when the GPS III Contingency Operations Program (COps) successfully connected with the first GPS III satellite on orbit. The COps system will allow the Air Force to operationally command and control the new, more powerful GPS […]

  All CGSIC,        The Air Force Second Space Operations Squadron (2 SOPS) has issued a LAUNCH NANU for SVN-74, the first of the new generation of GPS-III satellites.  To clear up any confusion this may have caused, SVN-74 was launched on 23 December of 2018, JDAY 357 2018, but there is no provision in a strictly formatted LAUNCH NANU to list a previous year.  The first of its kind, this satellite was launched outside of the GPS Ground […]

  All CGSIC, Publication of New Graphic Representing GPS Satellite Slot and Plane Designations The Global Positioning System Directorate has approved a change to the Navstar GPS Control Segment to User Support Community Interfaces (ICD-GPS-240 and ICD-GPS-870) which will remove GPS satellite plane/slot and clock information from the Operational Advisory message. This change proposal was approved by the GPS Interface Control Working Group in December of 2018. SVN/PRN, Block Type, and […]