Civil GPS Service Interface Committee (CGSIC)
The Civil GPS Service Interface Committee (CGSIC) is the recognized worldwide forum for effective interaction between all civil GPS users and the U.S. GPS authorities. DOT chairs the CGSIC and the USCG Navigation Center (NAVCEN) serves as the Deputy Chair and Executive Secretariat.
Agenda from the 65th Meeting of the Civil GPS Service Interface Committee, April 20-21, 2026
The 65th meeting of the U.S. Government’s Civil GPS Service Interface Committee (CGSIC) was hosted by the U.S. Department of Transportation (DOT) Office of Positioning, Navigation, Timing (PNT) & Spectrum Management and the U.S. Coast Guard (USCG) Navigation Center (NAVCEN). The meeting was held on 20 & 21 April 2026 at the Department of Transportation Headquarters building in Washington, DC. DOT serves as the civil lead for the Global Positioning System (GPS) and chairs the CGSIC in this capacity. NAVCEN fulfills duties as Deputy Chair and Executive Secretariat for the CGSIC.
- U.S. National Space-Based PNT Update
Mr. Harold Martin, Director, National Coordination Office for Space-Based Positioning, Navigation, and Timing
View PDF (1,202 KB)
- GPS Civil Liaison Updates
Dr. Andrew Hansen and Mr. Shawn Skalski, U.S. Department of Transportation Volpe National Transportation Systems Center
View PDF (941 KB)
- CGSIC Attendee Packet: CGSIC_Attendee_Packet.pdf (1,430 KB)
Agenda from the 64th Meeting of the Civil GPS Service Interface Committee, September 16-17, 2024
- U.S. Department of Transportation Update
Ms. Karen Van Dyke, Director, PNT and Spectrum Management, U.S. Department of Transportation
View PDF (1,809 KB)
- U.S. National Space-Based PNT Update
Mr. Harold Martin, Director, National Coordination Office for Space-Based Positioning, Navigation, and Timing
View PDF (742 KB)
- GPS Civil Liaison Updates
Dr. Andrew Hansen and Mr. Shawn Skalski, U.S. Department of Transportation Volpe National Transportation Systems Center
View PDF (676 KB)
Agenda from the 63rd Meeting of the Civil GPS Service Interface Committee, September 11-12, 2023
- U.S. Department of Transportation Update
Ms. Karen Van Dyke and Dr. Andrew Hansen, Office of the Assistant Secretary for
Research and Technology, U.S. Department of Transportation
VIEW PDF (1,540 KB) - U.S. National Space-Based PNT Update
Mr. Stormy Martin, Director, National Coordination Office for Space-Based
Positioning, Navigation, and Timing
VIEW PDF (903 KB) - GPS Civil Liaison Updates
Dr. Andrew Hansen and Mr. Shawn Skalski, U.S. Department of Transportation Volpe National Transportation Systems Center
View PDF (538 KB) - History of the GPS Revolution on the Occasion of the 50th Anniversary of Gaining Initial Approval in December of 1973
Dr. Bradford Parkinson, Edward Wells Professor, Emeritus, Aeronautics and Astronautics (Recalled), Co-Director, Center for Position, Navigation and Time, Stanford University
"An Expurgated History of the GPS Revolution on the occasion of the 50th anniversary of its initial approval in December of 1973"
By Bradford Parkinson - (There at the beginning), September 12, 2023
DOWNLOAD, VIEW & LISTEN -> .MP4 VIDEO FILE (108.1 MB) (Note: Video stabilizes after 40 seconds)
DOWNLOAD, LISTEN ONLY -> .M4A AUDIO FILE (46.2 MB) Origins of the Civil GPS Service Interface Committee (CGSIC).
By Brent Renfro, The University of Texas Applied Research Labs (ARL-UT)
DOWNLOAD, VIEW & LISTEN .MP4 VIDEO FILE (428.4 MB) -> Renfro-CGSICHistory_Revised.mp4
