Global Navigation Satellite Systems Engineering, Policy, and Design
[UPDATED Oct. 21, 2010] Contestants from all over the United States and the world have sent in their new GNSS apps to the USA Challenge — the North America regional contest in the 2010 European Satellite Navigation Competition (ESNC).
The judges, all GNSS business and technology experts, have ranked the submissions.
And the five best satellite navigation applications ideas are . . .
By Inside GNSS
Catamaran Hotel, San DiegoThe 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.
By Inside GNSS
Moscone CenterThe 2010 American Geophysical Union Fall Meeting will be held at the Moscone Convention Center in San Francisco, California from Monday, December 13 to Friday, December 17.
There are dozens of GNSS-related presentations at this AGU mega-meeting of 16,000 space and earth scientists. The preliminary program lists 770 scientific sessions in climate change, space weather, planetary exploration, volcanism and seismology, Earth’s magnetic field and more.
By Inside GNSS
FIGURE 1: Screenshot of RF simulation software showing GPS + GLONASS + Galileo constellationsIn 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.
By Inside GNSS
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.
By Inside GNSS
Lingotto Fiere, Turin/Torino, ItalyThe 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:
By Inside GNSS
Prague Congress CentreThe 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.
By Inside GNSS
The Portland skyline with a GPSIIF satellite is featured in the Inside GNSS booth at ION GNSS 2010by 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.
By Inside GNSS
Eclipse II GNSS OEM BoardHemisphere GPS announced its next-generation Eclipse II GNSS receiver technology today (September 8, 2010) and the release of the Eclipse II OEM board.
By Inside GNSS
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.
By Inside GNSS
The United States remains the current leader in space competitiveness, but its relative position is eroding in the face of increased funding, streamlined policy, and industrial improvements in other space-faring nations.
By Inside GNSS
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.
By Inside GNSS
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.
By Inside GNSS
