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IP Solutions Introduces ReGen GNSS Simulator

IP Solutions ReGen software simulator GUI

Tokyo, Japan–based IP Solutions has released its ReGen GNSS DIF Signal Simulator, a software simulator that simulates ionospheric effects, generates digital IF (DIF) signals similar to those recorded by an RF recorder, and comes with an optional capability of simulating integrated inertial navigation.

Various configurations can produce multichannel GPS and GLONASS L1 signals and single-channel GPS L1, L2, L5 and GLONASS L1 and L2 signals, as well as simulating noise and interference.

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By Inside GNSS
September 8, 2011

GPS III

FIGURE 1: GPS III On Orbit

In May 2008, Lockheed Martin Space Systems Company received a contract from the U.S. Air Force to develop a new, third generation of GPS satellites. The GPS III space vehicle (SV) has been designed (Figure 1, see inset photo, above right) and is now being built to bring new future capabilities to both military and civil positioning, navigation, and timing (PNT) users throughout the globe.

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By Inside GNSS
August 16, 2011

LightSquared Charges That GPS Receiver Manufacturers “Ignore” DoD Standards

LightSquared has opened a new rhetorical front in its battle with the GPS community over the company’s efforts to convert L-band frequencies into terrestrial wireless broadband services: claiming in an August 11 letter to the Federal Communications Commission (FCC) that receiver manufacturers “chose to ignore” Department of Defense (DoD) standards.

In response, the Coalition to Save Our GPS, a group of GPS receiver manufacturers opposed to LightSquared’s plans, called the company’s filing an act of "desperation."

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By Inside GNSS
July 11, 2011

GNSS-Based Attitude Determination

FIGURE 1: Heading, bank and elevation angles of an actual platform carrying two perpendicular two meter-long baselines. The attitude solutions are shown for both the derived, or float, measurements (top), as well as the carrier phase-based, or fixed, measurements obtained after having correctly resolved the integer ambiguities (bottom). Precision differs between the methods by two orders of magnitude. Gray dots represent the two-dimensional projections on each of the three coordinate planes.

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.

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By Inside GNSS

What is a virtual reference station and how does it work?

Q: What is a virtual reference station and how does it work?

A: To reach centimeter-level — or even better — accuracy of positioning typically requires use of precise dual-frequency carrier phase observations. Furthermore, these observations are usually processed using a differential GNSS (DGNSS) algorithm, such as real time kinematic (RTK) or post-processing (PP). Regardless of the specific differential algorithm, however, implicit in the process is an assumption that the quality of the reference station data is consistent with the desired level of positioning accuracy.

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By Inside GNSS

China Satellite Conference 2011

Hotel Nikko New Century in Haidian, Beijing

This officially sanctioned conference and equipment exhibtion addresses applications, technologies and trends for China’s satellite communications, broadcasting, remote sensing, navigation and positioning.It will be held at Hotel Nikko New Century in Beijing on October 26.28, 2011.

Subjects of most interest to Inside GNSS readers include:

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By Inside GNSS
July 5, 2011

UAV-g 2011: Unmanned Aerial Vehicle in Geomatics

ETH Hönggerberg from the south (Hannes Röst photo)

The Swiss Federal Institute of Technology (ETH) sponsors this conference and exhibition on UAVs and geomatics at Campus Science City (Hoenggerberg) in Zurich, Switzerland from September 14 through 16, 2011.

UAV-g 2011 will bring together experts in photogrammetry, surveying, robotics, computer vision, artificial intelligence and aerospace engineering.

Researchers, developers, service and systems providers and users are invited to exhibit and demonstrate their UAV systems in geomatics at at the Birrfeld airfield on Thursday, September 15.

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By Inside GNSS
July 1, 2011

Verification Testing

A GNSS signal simulator is mainly used to simulate GNSS signals transmitted by navigation satellites, propagated through the Earth’s atmosphere, and received by the receiver antenna. A simulator provides a convenient signal source for the test and validation of receiver function and performance and can also be used in GNSS experiments and studies of signal/data processing algorithms.

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By Inside GNSS
June 15, 2011

LightSquared Gets Two-Week Extension on GPS Interference Report; Congressman Calls on FCC to Rescind Waiver

LightSquared graphic

With test results and congressional sentiment running against it, LightSquared has received a two-week extension for filing its report and recommendations, due to the Federal Communications Commission (FCC) yesterday (June 15, 2011), on likely interference to the GPS L1 band.

Meanwhile, a congressional critic of LightSquared’s effort to roll out a 4G/LTE broadband cellular service adjacent to the GPS frequency has called on the agency to rescind its waiver of limits on the company’s plans to build a high-powered national network of terrestrial transmitters.

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By Inside GNSS
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