GNSS (all systems)

GNSS Simulation: A User’s Guide to the Galaxy

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
A Search for Spectrum: GNSS Signals in S-Band, Part II

A Search for Spectrum: GNSS Signals in S-Band, Part II

GNSS utilization of the S-band portion of the radio spectrum provides some challenges to designers of both GNSS navigation signals as well as signals used by other services, in terms of interference avoidance and signal power.

An important existing user of S-band spectrum is the Globalstar communications satellite system. The voice and data services provided by Globalstar employ the 2483.5–2500 MHz band for its satellite downlink communications to user terminals. Additionally, these satellites use multi-beam antennas to enable frequency reuse.

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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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2010 UN-IAF Workshop: GNSS Applications for Human Benefit and Development
September 14, 2010

2010 UN-IAF Workshop: GNSS Applications for Human Benefit and Development

Prague Congress Centre

The workshop on GNSS Applications for Human Benefit and Development is sponsored by the United Nations Office for Outer Space Affairs and the International Astronautical Federation (IAF).

It is the 20th joint UN-IAF workshop and will be held at the Prague Congress Centre (PCC) in Prague, Czech Republic just before the 61st International Astronautical Congress that runs from September 27-October 1.  Participants at either event are welcome at the other.

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By Inside GNSS
Oregon: More GPS Product Design and GNSS-related Industry Here Than You May Think
September 10, 2010

Oregon: More GPS Product Design and GNSS-related Industry Here Than You May Think

The Portland skyline with a GPSIIF satellite is featured in the Inside GNSS booth at ION GNSS 2010

by Glen Gibbons

Few would mistake Oregon for the beating heart of GNSS. Still,  for a medium-sized U.S. metro area in the Pacific Northwest, Portland  and Oregon’s I-5 corridor has enough relevant involvement with the industry to justify hosting the Institute of Navigation’s 2010 GNSS conference and exhibition.

Oregon has FLIR Systems, Cloud Cap Technology, TriQuint, Intel, Garmin and Inside GNSS magazine.

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By Inside GNSS
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
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A Search for Spectrum
August 17, 2010

A Search for Spectrum

In recent years, researchers have explored possible new allocations for Radio Determination Satellite Service (RDSS) and Radio Navigation Satellite Service (RNSS) spectrum from a regulatory point of view. These studies have mainly discussed S-band and C-band in addition to L-band.

The International Telecommunications Union (ITU) Radio Regulations define RNSS as a subset of RDSS. Although the allocations are differentiated — RDSS usually has a paired uplink — both can actually be used for satellite navigation.

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By Inside GNSS
A Fully Digital Model for Kalman Filters

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
Map Africa 2010
August 14, 2010

Map Africa 2010

Map Africa 2010 conference and exhibition will take place at the Cape Town International Convention Centre (CTICC) in the center of Cape Town, South Africa on November 23-25, 2010.

The theme is "Geospatial Readiness for Building Africa." The conference will focus on the most pressing areas that contribute to the nation’s growth, such as infrastructure and utilities, cadastral mapping, land information management system (LIS), land policies, mining and exploration and emergency management.

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By Inside GNSS
EIWAC 2010: 2nd ENRI Workshop on ATM/CNS

EIWAC 2010: 2nd ENRI Workshop on ATM/CNS

Japan’s Electronic Navigation Research Institute (ENRI) will present the second workshop on Communications, Navigation and Surveillance Systems for Air Traffic Management at the Akihabara Convention Hall in Tokyo on November 11 and 12, 2010.

Registration will close on October 30, 2010.

The theme is ForeSEE: Safety, Efficiency and Environment. The conference is free and will be held in English.

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By Inside GNSS
G-spatial EXPO 2010
August 13, 2010

G-spatial EXPO 2010

The theme of the G-spatial Expo is "When and Where," how geospatial information is changing our lives.The goal of the event is to promote space-based positioning, navigation and timing technologies and to inspire new businesses that use geospatial information.

It will take place at Pacifico Yokohama in Yokohama, Japan on September 19-21, where more than 30,000 visitors are expected during the run of the event.

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By Inside GNSS
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