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ION 2011 International Technical Meeting
September 16, 2010

ION 2011 International Technical Meeting

Catamaran Hotel, San Diego

The Institute of Navigation International Technical Meeting (ITM) will take place January 24-26 at the Catamaran Hotel on Mission Bay in San Diego California.

Paul Kline of Honeywell Aerospace is the general chair. Jade Morton of Miami University, Ohio, is the program chair.

"Robotics Navigation" is the plenary session topic. Invited speakers will discuss current trends and future technologies that support navigation for surveillance, search and rescue, undergound and underwater robotics and unmanned air vehicles.

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By Inside GNSS
GNSS Simulation: A User’s Guide to the Galaxy
September 15, 2010

GNSS Simulation: A User’s Guide to the Galaxy

FIGURE 1: Screenshot of RF simulation software showing GPS + GLONASS + Galileo constellations

In the first article in this series (Inside GNSS, July/August, 2010) we looked at the range of tasks that require GNSS signal simulation during design, manufacturing, certification, and maintenance of GNSS equipment. The second installment (Inside GNSS, September, 2010) described a range of simulation solutions.

In this final article, we try to find a simulation solution that best suits a particular task.

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By Inside GNSS
ITN 2010: Infrastructure, Telematics and Navigation

ITN 2010: Infrastructure, Telematics and Navigation

Lingotto Fiere, Turin/Torino, Italy

The second European conference and exhibition on smart infrastructures, infomobility, telematics and Galileo and other GNSSes will take place at Lingotto Fiere in Turin, Italy on November 11-12, 2010.

Presenter abstracts are due by October 7, 2010.

These subjects will be covered in the conference and/or the exhibit area:

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By Inside GNSS
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When GNSS Goes Blind
September 7, 2010

When GNSS Goes Blind

A completely GPS-based navigation solution is generally not feasible in GNSS signal–challenged environments such as urban canyons. However, even in these difficult environments a partial set of GPS signal measurements may still be available. For instance, one or two satellites are generally still visible even in dense urban canyons.

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By Inside GNSS
A Fully Digital Model for Kalman Filters
August 17, 2010

A Fully Digital Model for Kalman Filters

Q: Is it possible to define a fully digital state model for Kalman filtering?

A: The Kalman filter is a mathematical method, purpose of which is to process noisy measurements in order to obtain an estimate of some relevant parameters of a system. It represents a valuable tool in the GNSS area, with some of its main applications related to the computation of the user position/velocity/time (PVT) solution and to the integration of GNSS receivers with an inertial navigation system (INS) or other sensors.

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By Inside GNSS
Aldacom Offers GPS/Linux PC/GPRS Breadboard
August 10, 2010

Aldacom Offers GPS/Linux PC/GPRS Breadboard

Aldacom GmbH, of Neu-Isenburg, Germany, recently announced the debut of the AldaLogic C10/3, a breadboard containing an embedded Linux PC on a surface measuring 104 x 63 millimeters.

The unit also contains a Quad-band GPRS module and SiRF3 GPS module, as well as interfaces for USB, RS232 and Ethernet components. An SD-card reader enables expansion of the standard 4 Mb of flash memory.

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By Inside GNSS
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Spectracom Launches GSG-54 8-Channel Simulator

Spectracom Launches GSG-54 8-Channel Simulator

Spectracom has introduced a new eight-channel GPS constellation simulator, the Pendulum GSG-54.

Designed to provide a wide-range of capabilities for in-line production testing of devices integrating GPS receivers, according to the company, the simulator features ease-of-operation, fast test cycles, and versatility in supporting the integration of GPS receivers into devices under development. The unit’s bench-top chassis is designed to be compact, portable, and easy to set up.

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By Inside GNSS
GNSS Simulators
July 27, 2010

GNSS Simulators

FIGURE 1: GNSS multi-channel signal simulator 10 years ago on its own (left) and with its ever-growing family (right)

For the complete story, including figures, graphs, and images, please download the PDF of the article, above.

In this article we describe the design and operation of a generic GNSS RF simulator. We also will look at the main types of GNSS RF simulators, their designs and specifics, their advantages and disadvantages.

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By Inside GNSS
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Help from Above

During flight testing, Boeing technical personnel have historically used a differential GPS (DGPS) system as the position truth reference for validating various production systems on the airplane. The majority of those tests occur on or near remote runways to capture specific environmental conditions.

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By Inside GNSS
Generating Carrier Phase Measurements
June 22, 2010

Generating Carrier Phase Measurements

Q: What is the carrier phase measurement? How is it generated in GNSS receivers?

A: Simply put, the carrier phase measurement is a measure of the range between a satellite and receiver expressed in units of cycles of the carrier frequency. This measurement can be made with very high precision (of the order of millimeters), but the whole number of cycles between satellite and receiver is not measurable.

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By Inside GNSS
Death of a Russian Engineer
May 31, 2010

Death of a Russian Engineer

Stas Sila-Novitsky (left) and Javad Ashjaee. Photo by Marc Cheves, American Surveyor

Very sad news from Moscow. Earlier this month, Stanislav Sila-Novitsky — Stas to his friends and colleagues — died unexpectedly after a short illness.

A member of the executive staff of Javad GNSS, Sila-Novitsky had a long career in space electronics engineering. During the Soviet era, he was the department head with the Russian Space Agency’s Institute of Space Device Engineering, which was responsible for the development of the overall GLONASS system electronics.

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By Inside GNSS
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