Air Force determines cause of GPS timing issue

February 2, 2016By

On Jan. 26 at 12:49 a.m. MST, the 2nd Space Operations Squadron (2 SOPS) at the 50th Space Wing, Schriever Air Force Base, Colo., verified users were experiencing GPS timing issues. Further investigation revealed an issue in the GPS ground software that only affected the time on legacy L-band signals. This change occurred when the oldest vehicle, SVN 23, was... read more

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2015 in review: Year of the GPS for 2 and 19 SOPS

January 6, 2016By

By 50th Space Wing Public Affairs, Schriever Air Force Base Throughout the years, GPS has achieved historic milestones and garnered recognition for its contributions to the betterment of humanity. 2015 was no different. GPS, operated by the dedicated men and women of the 2nd and 19th Space Operations Squadrons at Schriever Air Force Base, Colorado, is also the world’s largest military satellite constellation.... read more

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First GPS III Satellite Ready for Harsh Environment Testing

May 4, 2015By

Using a 10-ton crane, Lockheed Martin engineers and technicians gently lowered the system module of the U.S. Air Force’s first next generation GPS III satellite into place over its propulsion core, successfully integrating the two into one space vehicle. The April systems integration event brought together several major fully functional satellite components. The system module includes the navigation payload, which... read more

What to Do, Who to See at the 31st Space Symposium

April 8, 2015By

Every year before I attend the Space Symposium, I make a list of topics to explore and people to talk to, both as a journalist and in my senior space analyst profession. I thought I would share my topics and names with you, because you may have some of the same interests — including GPS III, OCX and up-and-coming executives and officers. read more

GPS IIF-9 Launches Wednesday

March 23, 2015By

The U.S. Air Force’s ninth GPS Block IIF satellite (GPS IIF-9) is set to launch Wednesday at 2:36 p.m. EDT (1836 GMT)  from Space Launch Complex 37 at Cape Canaveral Air Force Station, Fla. The GPS IIF-9 will ride aboard a United Launch Alliance (ULA) Delta IV rocket, marking the 29th Delta IV launch and the 57th operational GPS satellite to launch on... read more

Braxton LADO System Supports 10th GPS Satellite Initialization

April 21, 2014By

GPS IIF-5 was launched on February 20 and turned over to the 2nd Space Operations Squadron (2 SOPS) for operations on March 5. This was the 10th successful launch and initialization using Braxton Technologies‘ Launch, Anomaly Resolution, and Disposal Operations (LADO) system. LADO has performed all the mission planning, commanding and telemetry processing necessary to prepare all GPS satellites for... read more

Next-Generation Clock Increases Stability to 300 Picoseconds

February 11, 2014By

The U.S. Naval Observatory’s Alternate Master Clock on Schriever Air Force Base received its second rubidium fountain clock February 4 to ensure it has the most precise time in the world. Both the USNO’s Washington D.C.-based primary and its local Alternate Master Clock facility serve as the Department of Defense’s common time reference. Additionally, the USNO monitors the GPS constellation... read more

Directions 2014: Keeping Our Commitment to Civil Users

December 1, 2013By
Colonel William T. “Bill” Cooley.

The cliché “time flies when you’re having fun” accurately describes how quickly the past six months have passed for me. In a program as challenging, rewarding, and mission-critical as GPS, it is full-speed ahead all the time. As the GPS director, I am acutely aware of the importance of time — particularly high-accuracy time. Since declaring initial operational capability in December 1993, the extremely precise time service delivered by GPS has enabled numerous technological advances around the globe. read more