TAG: GPS IIF-3

Launch of GPS Satellite Struggled through Tense Moments

December 10, 2012By
United Launch Alliance Delta IV rocket blasts off from Space Launch Complex-37 with the U.S. Air Force’s Global Positioning System (GPS) IIF-3 satellite. This launch marks the 9th ULA launch this year, the 54th Evolved Expendable Launch Vehicle (EELV) mission, and the 65th launch since ULA was formed nearly six years ago.

A new report by Spaceflight Now reveals that the launch October 4 of a GPS satellite experienced tense touch-and-go moments. The Delta 4 rocket’s cryogenic upper stage engine experienced a fuel leak that caused a low-thrust condition. Four-and-a-half minutes into the launch, after the first stage had shut down and separated, the trouble began as the RL10B-2 engine on the... read more

ION, LightSquared, and GPS IIF-3

October 10, 2012By
Stained-glass

By Don Jewell It had to happen sometime. I just thought or hoped it might take a few more years. But I guess I should not be surprised since I experienced a wonderful 30-year U.S. Air Force (USAF) career and that has been over for more than a decade. I have been working GPS issues since 1978. So I guess... read more

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GPS IIF-3 Satellite Now Transmitting L1, L2 Signals

October 4, 2012By
A Delta IV rocket lifts-off with an advanced GPS satellite from Cape Canaveral on Thursday. (Credit: ULA/Atkeison).

Video of launch. UPDATE: The SVN65/PRN24 L5 transmitter has now been switched on. L5 is the civilian safety-of-life GPS signal, designed to meet demanding requirements for safety-of-life transportation and other high-performance applications. UPDATE: The GPS Block IIF-3 satellite, SVN65, began transmitting L1 and L2 signals as PRN24 on October 8. A number of stations of the International GNSS Service are... read more

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