Global Navigation Satellite Systems Engineering, Policy, and Design
The nation’s top GPS experts pressed the Air Force this week to turn on the full capability of the L2C civil GPS signal that the military has been broadcasting without a navigation message despite having had signal-equipped satellites on orbit for years.
By Inside GNSS
L-3 Interstate Electronics Corporation (IEC) will conduct an operational demonstration of its new TruTrak Evolution (TTE) Type II Selective Availability Anti-Spoofing Module (SAASM) GPS receiver at AUVSI’s Unmanned Systems North America 2012 conference taking place this week (August 6–9, 2012) in Las Vegas, Nevada.
The demonstration will highlight the new TruTrak receiver’s multi-use capabilities as a high-performing Ground-Based GPS Receiver Applications Module (GB-GRAM) for use on UAS platforms and precision weapons.
By Inside GNSS
Two industry experts on GNSS interference and jamming will lead an Inside GNSS web seminar scheduled for August 22. Tom Stansell and Logan Scott will join moderator Mark Petovello on a panel to discuss the subject, ““GNSS Jamming & Interference: Causes, Consequences, and Solutions.”
By Inside GNSS
Galileo IOV’s Composite Binary Offset Carrier (CBOC) modulation on E1 Open Service signal, courtesy of ESA Off-line Analysis SIS SoftwareThe first two Galileo in-orbit validation (IOV) satellites in space have achieved a new milestone, transmitting dummy signals in a modulation scheme designed to allow full interoperability with GPS once operational services start.
“This is an advanced modulation technique that offers robust protection against signal interference and the misleading signal reflections known as ‘multipath’,” said Marco Falcone, Head of Galileo System Services.
By Inside GNSS
ESA expert inspecting GIOVE-A in clean room in Baikonur Space Center, Kazakhstan. ESA photoWith the first two Galileo in-orbit validation (IOV) spacecraft working well, the European Space Agency (ESA) has decided to end the mission of its pioneering GIOVE-A satellite that had long exceeded it original purpose and design life.
Meanwhile, with the next Galileo launch approaching, ESA has expanded its Radio Navigation Laboratory (RNL) to meet the testing needs of Europe’s GNSS program.
By Inside GNSS
The convergence of mobile communications, information, and navigation technologies is driving the need to re-examine interference and jamming issues within a broader national and international cybersecurity framework, a U.S. homeland security official told a recent conference on GNSS vulnerability.
By Inside GNSS
Four months after the Federal Communications Commission (FCC) indicated its intention to backtrack on its conditional approval of LightSquared’s terrestrial wireless broadband network, a leading GNSS manufacturer is pressing the agency to finalize its decision.
By Inside GNSS
L-3 IEC Tru-Trak SIPL-3 Communications announced today (June 14, 2012) that its Interstate Electronics Corporation (L-3 IEC) business has successfully completed multiple test firings of its next-generation Military Code (M-code) GPS receiver technology.
This milestone represents a significant breakthrough in GPS receiver modernization and validates the unit’s survivability and performance in extreme, guided munitions environments, according to an L-3 IEC news release.
By Inside GNSS
EQUATIONS 1 -11GLONASS currently uses a frequency division multiple access (FDMA) technique to distinguish the signals coming from different satellites in the Russian GNSS constellation. The GLONASS L1 and L2 bands are divided into 14 sub-bands, and each satellite transmits in one of these.
The sub-bands are identified by frequency numbers k, from -7 to 6. The GLONASS L1 and L2 carrier frequencies, in hertz, at a frequency number k are defined by:
Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
By Inside GNSS
MBOC signal at top, BOC (1,1) at bottom(Updated May 21) U.S. warfighters could be affected and European navigation users could end up paying more if the British are able to enforce a patent on technology at the heart of the new GPS and Galileo civil signals.
By Inside GNSS
The launch of the first GPS III satellite has slipped to 2015 and completion of the ground control system is now delayed by up to two years, according to the chief of the Air Force’s space operations
“We’ll be ready to launch the first GPS III in 2015, but it now appears the next generation GPS Operational Control System, or OCX, won’t be ready for about a year or two after that,” General William L. Shelton, commander of Air Force Space Command told attendees at the 28th Annual National Space Symposium.
By Inside GNSS
