Eric D. Colburn, PLS

Professional Land Surveyor News

Professional Land Surveyor News: USAF Begins Test  Satellite GPS IIF Transmission of L5 Signal

LOS ANGELES AIR FORCE BASE, El Segundo, Calif. – Officials from the Space and Missile Systems Center’s Global Positioning Systems Wing announced that the first GPS IIF satellite, launched May 27, 2010, has begun test transmissions of the new Safety-of-Life (L5) navigation signal.

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Professional Land Surveyor News

Professional Land Surveyor News: Air Force Upgrades GPS Constellation

SCHRIEVER AIR FORCE BASE, Colo. — The 2nd and 19th Space Operations Squadron will soon take control of the Air Force’s newest GPS satellite following its tentative launch into orbit May 27 from Cape Canaveral Air Force Station, Fla.

The GPS IIF SV-1 satellite represents a substantial upgrade for the GPS constellation. Thanks to improvements with the cesium-based atomic clocks used for timing, the IIF is expected to provide more accurate navigation signals than those of its predecessors.

The new IIF satellite will also broadcast two new signals: a jam resistant military code signal and a third civil signal known as the L5.

This latest addition is part of an ongoing modernization effort for the GPS constellation by the Air Force.

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EL SEGUNDO, Calif., June 25, 2009 — Boeing [NYSE: BA] has shipped a Global Positioning System (GPS) IIF satellite to Cape Canaveral Air Force Station in Florida to conduct a series of key tests for the U.S. Air Force’s next-generation satellite navigation system.

Built at Boeing’s El Segundo satellite factory, Space Vehicle 2 (SV-2) is undergoing ground testing to prepare for the launch of SV-1, the first of 12 GPS IIF satellites. SV-2 arrived at Cape Canaveral May 7 aboard a C-17 Globemaster III.

SV-2 is being used to execute a consolidated system test (CST), which is a set of one-time, system-level design validation tests involving the space vehicle, the ground-based control segment, and user equipment. SV-2 is also being used as a “pathfinder” to validate satellite transportation processes and equipment, and to validate the launch site test program, procedures and equipment. After completion of the CST and pathfinder activities, SV-2 will return to El Segundo to prepare for its own launch from the Cape. Read the rest of this entry →