GPS Modernization

DoT Disses DoD’s GPS Chops

January 9, 2014By

The departing Deputy Secretary of Transportation, John Porcari, wrote a letter in the closing days of 2013 opposing the U.S. Air Force’s announced plans to begin broadcasting Civil Navigation (CNAV) message-populated L2C and L5 signals as early as April 2014. Military personnel are incensed over what they see as Porcari’s impugning, when not ignoring, the Air Force 35-year track record... read more

The System: Two More Threes for Space

January 1, 2014By

A December 12 contract modification provided Air Force funding to Lockheed Martin to complete the fifth and sixth GPS III space vehicles (SV 05-06). Lockheeed originally received funding to procure long-lead parts for satellites five through eight (SV 05-08) in February 2013. read more

Raytheon Granted $8.5M Change Order for OCX M-Code Implementation

December 30, 2013By

Raytheon Intelligence and Information Systems has been awarded a change order for work that costs up to $8.5 million on its existing contract to ensure that the new military signal, M-code, works with the GPS Operational Control System, according to an announcement from the Pentagon as reported by Space News. Raytheon is building the ground station (OCX) for a new... read more

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Lockheed Receives $200M for GPS III 5 and 6

December 17, 2013By
GPSIII-prototype-ocx-test-O

Lockheed Martin Corporation has been awarded $200 million to produce GPS III satellites 05 and0 6 by the U.S. Air Force. Lockheed Marin originally received funding to procure long-lead parts for satellites five through eight (SV 05-08) in February. The award is a $200,700,415 cost-plus-incentive-fee modification (P00276) on an existing contract (FA8807-08-C-0010). Work will be performed at Littleton, Colorado, and... read more

Air Force Directs Early Civil Navigation (CNAV) Message-Populated L2C and L5 Signals

December 17, 2013By

The U.S. Air Force is directing transmission of continuous CNAV message-populated L2C and L5 signals starting in April 2014. The move is designed to help development of user equipment compatible with the civil signals. Full text of the CNAV memo appears below. MEMORANDUM FOR THE NATIONAL COORDINATION OFFICE FOR SPACE BASED POSITIONING, NAVIGATION AND TIMING ATTENTION: DR. JAN BRECHT-CLARK FROM:... read more

Directions 2014: Great Expectations

December 1, 2013By
Peter Large

By Peter O. Large, Vice President, Trimble November 29, 2013, marks the 210th anniversary of the birth of Christian Doppler. His work laid down the fundamental concepts that enabled researchers at Johns Hopkins University in the United States to make observations on the signals of Sputnik I during the International Geophysical Year of 1957. From those observations more than 60... 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