GNSS (all systems)

SYNTONY Awarded ONEWEB Contract

SYNTONY Awarded ONEWEB Contract

SYNTONY has been awarded a major contract by ONEWEB Company for the delivery of more than 15 GNSS Simulators.

ONEWEB is an Arlington, Virginia–based company that says it is building the largest satellite constellation ever to create a satellite-based Internet gateway, with 900 satellite launched. In that frame, SYNTONY will deliver his new released CONSTELLATOR product, capable of hardware-in-the-loop testing for low-Earth-orbit (LEO) satellite trajectories.

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By Inside GNSS
Septentrio Signs Deal with JPL, Rolls Out New GNSS Receiver

Septentrio Signs Deal with JPL, Rolls Out New GNSS Receiver

Septentrio has received a contract from the Jet Propulsion Laboratory (JPL) for 35 PolaRx5 GNSS receivers, the company said. The receivers, which consist of 25 reference stations and 10 timing instruments, will be used in the NASA Global GNSS Network (GGN).

In other company news, Septentrio rolled out its new PolaRx5TR GNSS receiver. The unit has 544 hardware channels, features a calibration circuit, and supports all major constellations including GPS, GLONASS, Galileo, BeiDou, QZSS, and IRNSS, the company said.

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By Inside GNSS
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IFEN Launches NCS TITAN GNSS Simulator

IFEN Launches NCS TITAN GNSS Simulator

IFEN has announced its new NCS TITAN multi-GNSS, multi-frequency and multi-RF output simulator.

With up to 256 channels and up to four RF outputs per chassis, the TITAN design avoids the extra complexity and cost of using additional signal generators or intricate architectures involv¬ing several hardware boxes, IFEN says, which improves reliability without compromising functionality.

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By Inside GNSS
Air Force Disposes of Long-Serving GPS IIA Satellite
September 16, 2016

Air Force Disposes of Long-Serving GPS IIA Satellite

The U.S. Air Force’s 2nd Space Operations Squadron (2SOPS) at the 50th Space Wing, Schriever Air Force Base, Colorado, has moved the longest-serving GPS satellite, space vehicle number (SVN) 23, into a disposal orbit several hundred miles above the operational GPS constellation.

The satellite, which was launched on November 26, 1990, had a rough start, the Air Force said. After early-orbit operations and initial stabilization in December 1990, SVN 23’s solar array stopped working.

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By Inside GNSS
Changing the Rules
September 9, 2016

Changing the Rules

How do you win when you are really losing?

Play a different game, move the goalposts, change the rules.

For several years now, a series of would-be wireless broadband service providers have been attempting to convince the Federal Communications Commission (FCC) to repurpose radio frequency spectrum near the GPS L1 band.

Past efforts have failed because of the transmissions’ demonstrated harmful effects on GPS and other GNSS signals. Now a new contender is trying to gain FCC’s approval by changing the way that those effects are measured.

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By Inside GNSS
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Single Versus Multiple
September 8, 2016

Single Versus Multiple

Dr. Kyle O’Keefe, University of Calgary

In the beginning, there was just one GNSS — the Global Positioning System — and just one fully available signal on the L1 frequency.

Eventually, some clever scientists discovered how to exploit certain characteristics of the encrypted L2 signal to come up with so-called codeless and semi-codeless techniques that enabled dual-frequency positioning. This hastened the development of user equipment that used the carrier phase of signals as well as the code to deliver high-precision results.

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By Inside GNSS
The Particular Importance of Galileo E6C

The Particular Importance of Galileo E6C

The Galileo E6 signal is centered at 1278.75 MHz, and comprises three signals: an authorized signal (E6A, the publicly regulated service, PRS plus two civilian signals), a data component (E6B), and a pilot component (E6C). Both E6B and C are modulated using binary-phase shift keying (BPSK) code division multiple access (CDMA) memory codes, having lengths of 5,115 chips and chipping rates of 5.115 Mcps.

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By Inside GNSS
It’s Time for 3D Mapping–Aided GNSS

It’s Time for 3D Mapping–Aided GNSS

Real-time position accuracy, achievable in dense urban areas using low-cost equipment, is currently limited to tens of meters. If this could be improved to five meters or better, a host of potential applications would benefit. These include situation awareness of emergency, security and military personnel and vehicles; emergency caller location, mobile mapping, tracking vulnerable people and valuable assets, intelligent mobility, location-based services and charging, augmented reality; and enforcement of curfews, restraining orders and other court orders.

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By Inside GNSS
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