From the Magazine

The Business — May 2015

May 1, 2015By

The Business section from the May 2015 issue. Download the PDF. Includes: Furuno Receiver Adopted for Parrot Bebop NovAtel Launches Relay RTK Radio Module Phantom 3 Has Indoor Positioning SBG Systems Selects Septentrio AsteRx4 for Apogee Series Hemisphere GNSS Offers RTK-Capable Antenna Applanix Offers Three New Marine Products Cobham Aeroflex Tester Used for ADS-B Briefs Events read more

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Expert Advice: Sensor Fusion for Highly Automated Driving

May 1, 2015By
Novatel-opener_EA

High-Precision GNSS Needs Help for Continuous Localization Reliability By Siamak Akhlaghi Automotive safety and comfort functions, known as Advanced Driver Assistance Systems (ADAS), have become an essential part of modern vehicles. These functions assist drivers in the driving process, providing capabilities such as adaptive cruise control or highway driving mode. To achieve a desired level of performance, the position of the... read more

Innovation: Carrier-Phase Ambiguity Resolution

April 3, 2015By
FIGURE 9. Network used for the triple-frequency PPP study.

Handling the Biases for Improved Triple-Frequency PPP Convergence
Precise point positioning (PPP) can be considered a viable tool in the kitbag of GPS positioning techniques. One precision aspect of PPP is its use of carrier-phase measurements rather than just pseudoranges. But there is a catch. Often many epochs of measurements are needed for a position solution to converge to a sufficiently high accuracy. In this month’s column, we look at how using measurements from three satellite frequencies rather than just two can help. read more

Galileo E1, E5a Performance for Multi-Frequency, Multi-Constellation GBAS

April 1, 2015By
Pullen-Galileo-O

Analysis of new Galileo signals at an GBAS compares noise and multipath in their performance to GPS L1 and L5. Even after smoothing, Galileo signals perform somewhat better than GPS and are less sensitive to the smoothing time constant. read more

The System: Celebrating 20 Years of GPS

April 1, 2015By
GPSIIF-launch-ULA-8

April marks the 20th anniversary of GPS FOC. U.S. Air Force Space Command declared Full Operational Capability (FOC) for the GPS constellation April 27, 1995, signifying the system met all requirements with 24 operational Block II/IIA satellites in their assigned orbital slots and providing both the military Precise Positioning Service (PPS) performance standard and the civil Standard Positioning Service (SPS)... read more

Expert Advice: Taking Up Positions — Galileo and E112

March 31, 2015By
Andy-Proctor-T

Europe is looking at the imposition of Galileo as part of an A-GNSS technology push for E112 emergency calling applications. E112 processes currently do not specify performance criteria for the position location accuracy. read more

Out in Front: The Things We Carry

March 31, 2015By
Alan Cameron, editor-in-chief

We have entered a discussion phase at the magazine, a fierce conversation if you will, occasioned on the one hand by the periodic need to freshen our appearance, but also to re-investigate and re-evaluate our whole approach. The way we do things, and the actual things we do. The thoughts and pre-conceptions and mental equipment we carry with us to... read more

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The Business — April 2015

March 30, 2015By

The Business section from the April 2015 issue. Download the PDF. Includes: Mobile World Congress Report; Rohde & Schwarz Adds Testing; FAA Seeks Comments on UAS; and more read more

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