Design & Test

Tallysman Offers Low Current Multi-Constellation Compact GPS Antennas

April 25, 2014By
Tallysman TW4327 and TW4329 antennas.

Tallysman Wireless, Inc., is offering a family of very low power, compact, high-performance GNSS antennas for precision, commercial, and military applications. Based in Ottawa, Canada, Tallysman Wireless,  is a designer and manufacturer of high-performance GNSS, Iridium, and Globalstar antennas and associated components. The TW4327 and TW4329 are low-power GPS L1 + GLONASS G1 antennas that feature current consumption of 1.75 mA... read more

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Spectracom Extends Local Service to the Asia-Pacific Region

April 17, 2014By

Spectracom, a business of the Orolia Group, has extended its global service capability through a partnership with EZU Technologies. Joining Spectracom  service centers in North America and Europe, EZU Technologies will support Spectracom users throughout the Asia-Pacific region from its facility in Hong Kong. Initially, services will include equipment calibration and repair services. Over time, more capability will be added... read more

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Spirent Enables Multi-GNSS Integration in Consumer Devices with New System

April 16, 2014By
GSS6300M

Spirent Communications today introduced the GSS6300M range of multi-channel GPS and multi-GNSS simulators for receiver integrators, application developers, aftercare and production testing environments. This entry-level test system readily enables laboratory evaluation of GPS performance across different locations and routes, Spirent said. In addition to being easy-to-use even for non-GPS experts, the GSS6300M range features competitive pricing for engineering teams looking... read more

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Locata Warns: Lessons to Be Learned from GLONASS Spasm

April 15, 2014By
Locata-O

Calling it an “unprecedented and deeply worrying total disruption . . . [that] shook the industry,” Locata Corporation reiterated its call for redundant terrestrial systems to back up GNSS in the wake of the April 1 11-hour GLONASS system outage. Nunzio Gambale, Locata CEO, said “We have been telling the industry for years that you cannot have a critically important... read more

Spectracom Offers GNSS Signal Generator for Production Testing

April 7, 2014By
GSG-51-GNSS-Signal-Generator-W

The GSG-51 GNSS signal generator provides a fast and cost-effective solution for production testing for Galileo and other GNSS. It emulates a single GNSS signal and can be upgraded for Galileo, as well as to increase the channel count, add receiver trajectory control, and add advanced features such as SBAS (WAAS, EGNOS,MSAS, or GAGAN), white noise generation, or multipath simulation.... read more

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How to Survive a Total Constellation Outage

April 3, 2014By
Broadcom-O3

Yesterday we posted news of an 11-hour downtime for the full GLONASS constellation, due to an upload of bad ephemerides. Coincidentally, during that 11-hour period, the mass-market chip company Broadcom was conducting multi-constellation receiver tests in Asia. Frank van Diggelen, Broadcom’s chief GNSS scientist and vice president says, “We have definitive data to show how a multi-constellation receiver survives such... read more

Innovation: Ground-Based Augmentation

April 2, 2014By
FIGURE 5. Research aircraft D-IBUF (Dornier Do 128-6).

Combining Galileo with GPS and GLONASS
While a GPS-based GBAS will offer improved navigation services for aircraft, might these services be even better if the systems were to use satellites from other constellations besides GPS? In this month’s column, the authors show how GBAS protocols might be modified to accommodate multiple constellations, offering results of preliminary tests using GPS, GLONASS, and Galileo simultaneously. read more

A Mass-Market Galileo Receiver

April 1, 2014By
mass-market-galileo-rx-O

Its Algorithms and Performance
The authors test three mass-market design drivers on a chip developed expressly for a new role as a combined GPS and Galileo consumer receiver: the time-to-first-fix for different C/N0, for hot, warm, and cold start, and for different constellation combinations. read more