Design & Test

Cobham Offers Aeroflex Tester for ADS-B

April 13, 2015By

Cobham AvComm, formerly the Aeroflex AvComm business unit, has introduced the ATC-5000NG NextGen ATC/DME Test Set. Designed for engineering development, design validation, manufacturing and return-to-service test applications, the ATC-5000NG is the replacement product for the legacy SDX-2000 and the ATC-1400A/S-1403DL. The software defined radio architecture supports more transponder RTCA DO-181E test capability than the legacy products did and has new capability... read more

Rohde & Schwarz Used to Test ERA-GLONASS Systems

April 13, 2015By

The Certification Center Svyaz-Certificate in Russia is now using the R&S CMW500 to certify ERA-GLONASS systems in line with the TR CU 018/2011 technical guideline. The independent Russian test lab is currently the only test lab in Russia accredited to certify these systems. The R&S CMW500 is a wideband radio communication tester. Equipped with the R&S CMW-KA095 application software, 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

Xsens Adds Active Heading Stabilization to IMU

April 2, 2015By

In the latest update of its Motion Tracker product portfolio, Xsens has added active heading stabilization (AHS) to its core sensor fusion algorithms on the MTi 10-series and MTi 100-series. Both series are MEMS-based inertial measurement units (IMU), attitude and heading reference systems (AHRS), and vertical reference units (VRUs). The AHS algorithm delivers fundamentally improved heading tracking accuracy, Xsens said. The improved robustness in... read more

Averna Partners with Investor Tandem Expansion

April 2, 2015By

Tandem Expansion Fund, a Canadian growth-equity investor, has acquired a majority interest in Averna, a developer of test solutions and services for communications and electronics device-makers, according to a news release from Averna. The transaction provides Averna with the financial resources to “accelerate organic and strategic growth as well as to expand its international presence,” the release said. Founded in 1999,... read more

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

April 1, 2015By
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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

ESNC 2015 Now Accepting Submissions

April 1, 2015By

The 2015 European Satellite Navigation Competition (ESNC), an international innovation competition that recognizes the best ideas in satellite navigation, will run from April 1 to June 30. Winners will be announced in October. There are more than 20 regions participating, and the ESNC will award prizes worth a total of €1 million in 30 categories. “Satellite navigation is an essential element of modern mobility and a... read more

Expert Advice: The Impact of RFI on GNSS Receivers

April 1, 2015By
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By Fabio Dovis When subjected to very strong interference, a GNSS receiver can be totally blinded and stop working. This is often the scope of intentional jammers. However, in a number of cases the presence of interference is severe enough to significantly decrease receiver performance, but not so much as to make the receiver lose its lock on the satellite signals... read more