Design & Test

UNB Technology Space Launch Delayed

September 16, 2013By
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Update: Elon Musk, SpaceX’s CEO and chief designer, has posted an update on the status of the upcoming Falcon 9 launch on his Twitter account. “Will do another static fire of rocket to make sure all is good & AF [[Air Force]] needs to test ICBMs, so probable launch Sept 29/30,” Musk tweeted. “The static fire is scheduled for later... read more

Loctronix Offers Software-Defined Radio Module

September 11, 2013By
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Loctronix Corporation, a provider of unified positioning solutions for GNSS-challenged environments, is making available its new software-defined radio (SDR) module, the ASR-2300, for developing high-performance positioning, navigation and timing, and communication applications. The ASR-2300 will be on display September 16-19 at the Institute of Navigation annual meeting, ION GNSS+ 2013, in Nashville, Tennessee. “The ASR-2300 delivers advanced SDR capabilities in... read more

Racelogic to Launch LabSat3 at ION GNSS+

September 11, 2013By
Racelogic LabSat3 simulator.

LabSat, the GPS record, replay, and simulation brand produced by Racelogic in the UK, is about to be augmented with the introduction of LabSat3. The key feature of the new product is its simplicity. It is, essentially, a single-box device that incorporates a GPS record-and-replay system without the need for a laptop or PC. Racelogic has designed the LabSat3 with... read more

Averna, National Instruments Team on Recording and Playback of RF Signals

September 4, 2013By

Averna, developer of test solutions and services for communications and electronics device-makers worldwide, now offers RF Studio for National Instruments Software Defined Radio Platform (USRP), converting the USRP into a portable and cost-effective RF system for the recording and playback of real-world GNSS signals. National Instruments USRP is an affordable, PC-hosted platform used with NI LabVIEW system design software to... read more

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Leica Camera Integrates u-blox GPS into M-System Series

September 3, 2013By
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Swiss-based u-blox has been chosen by Leica Camera as provider of GPS technology for its premium M-System camera and accessory series. Leica, which makes high-end and professional cameras, has integrated u-blox’ NEO GPS module into its new Multifunctional Handgrip M. The geotagging feature injects location data directly into each photo’s Exif header (Exchangeable image file format), allowing photos to be... read more

The System: IRNSS Signal Close up

September 1, 2013By and

IRNSS Signal Close up By Richard Langley, Steffen Thoelert, and Michael Meurer The spectrum of signals from IRNSS-1A, the first satellite in the Indian Regional Navigation Satellite System, as recorded by German Aerospace Center researchers in late July, appears to be consistent with a combination of BPSK(1) and BOC(5,2) modulation. Figure 1 shows that, centered at 1176.45 MHz, the signal... read more

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Innovation: Under Cover

September 1, 2013By
FIGURE 1. Artist’s impression of the synthetic-aperture GNSS system for surveying in a forest.

Synthetic-Aperture GNSS Signal Processing
We take a look at a novel GNSS signal-processing technique, which uses the principles of SAR to improve code and carrier-phase observations in degraded environments such as under forest canopy. The technique can simultaneously reject multipath signals while maximizing the direct line-of-sight signal power from a satellite. Along with a specially programmed software receiver, it uses either a single conventional antenna mounted, say, on a pedestrian’s backpack for GIS applications or a special rotating antenna for high-accuracy surveying. Want to learn more? Read on. read more

Signal Quality of Galileo, BeiDou

September 1, 2013By
Figure 1. 30-meter high-gain antenna.

Future positioning and navigation applications of modernizing and newly established GNSSs will require a higher degree of signal accuracy and precision. Thus, rigorous and detailed analysis of the signal quality of recently launched satellites, including the discovery of any possible imperfections in their performance, will have important implications for future users. read more