TAG: GPS IIF

GPS IIF-6 Launch Tracked by GPS, Not Radar

May 19, 2014By

Friday’s launch of a Delta 4 rocket carrying the latest GPS satellite was tracked via GPS itself instead of by radar, reports Spaceflight Now in an article. United Launch Alliance’s Atlas and Delta rockets are transitioning to GPS metric tracking for range safety functions, which protect the public and property should a launch vehicle veer off course. The move is a... read more

Disruption in Australia Traced to User Equipment

May 14, 2014By

User equipment incorrectly interpreting data from a satellite set “unhealthy” led to an apparent constellation outage for roughly 1,000 fleet vehicles across Australia in April. The problem was traced to the way a GPS/telecomm chip reacted to an extended navigation test aboard SVN-49, having to do with the recently launched IIF satellite, SVN-64. Although SVN-49 was set unhealthy at the... read more

GPS IIF-6 Launch Delayed until Friday Night

May 14, 2014By

Update: The launch of the GPS IIF-6 satellite has been delayed one day due to bad weather. Another GPS IIF satellite is expected to lift off aboard a United Launch Alliance Delta 4 rocket from Cape Canaveral at 8:08 p.m. EDT May 15 at the opening of an 18-minute launch window. The satellite, designated GPS IIF-6 and built by Boeing,... read more

New GPS IIF Satellite Launched

February 21, 2014By
A United Launch Alliance Delta IV lifts off from Space Launch Complex-37 with the Air Force's Global Positioning System (GPS) IIF-5 satellite. This launch marked the 25th Delta IV flight since the first flight in 2002.

News compiled with the assistance of CANSPACE listserv. After a brief delay due to concerns over solar radiation trends, the GPS IIF-5 satellite was successfully launched at the end of the designated launch window at 01:59 UTC on February 21. The satellite, attached to the launch rocket’s upper stage, was initially placed in a highly elliptical orbit. Following a third... 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

GPS III Prototype Proves Compatibility with Existing Constellation

November 21, 2013By
GPSIII-prototype-ocx-test-O

The Lockheed Martin prototype of the next-generation GPS satellite, the GPS III, has proven that it is backwardly compatible with the existing GPS satellite constellation in orbit. During tests that concluded on October 17, Lockheed Martin’s GPS III testbed successfully communicated via cross-links to Air Force simulators of the current GPS constellation in orbit. The current GPS constellation includes GPS... read more

GPS IIF-5 Launch Delayed

October 22, 2013By

The scheduled October 23 launch of GPS IIF-5, the fifth in the current “follow-on” generation of GPS satellites, has been postponed in order to complete a review of an adjustment made to the rocket’s upper stage engine. A fuel leak in that engine of the Delta 4 rocket during a GPS launch in October of last year created some worries... read more

Col. Bernard Gruber, GPS Directorate: Farewell Perspective on GPS Program

June 12, 2013By

I first met just-pinned-on, shiny and bright, Captain Bernard Gruber-USAF in 1992. Bernie had just arrived at the Space and Missile Systems Center at Los Angeles Air Force Base in California where he would hold several important positions. For those readers not aware of the mission and importance of the Space and Missile Systems Center (SMC), today SMC, which began... read more