Global Navigation Satellite Systems Engineering, Policy, and Design
Spectracom has announced the GSG-52 RF Signal Generator, a new offering in its line of GPS constellation simulators.
The GSG-52 is designed for in-line product testing of navigation-fix and positioning functions of integrated GPS or other GNSS receivers. In a compact portable form factor, the signal generator offers four-channel simulation and a list price of less than $10,000.
By Inside GNSS
FIGURE 1: Competitive group skydiving is currently judged by overlaying a grid on a photo and evaluating location of divers within its cells. Photo by Mark Harris.»NovAtel Inc. wingsuit video
In 1589, at the age of 25, Galileo Galilei toiled up the 294 steps of a 55-meter bell tower in Pisa, Italy, where he was tutoring math students at the time.
According to his pupil and later biographer, Vincenzo Viviani, Galileo carried with him two cannonballs, one twice the weight of the other. When he reached the top of the tower, he went to the lower balcony of the tilted structure and dropped the two balls simultaneously.
By Inside GNSS
A Residenz courtyard, MunichThe 2012 Munich Satellite Navigation Summit will take place at the Residenz Munchen in Germany from March 13 to 15. This year’s opening plenary theme is "GNSS and Security."
This year marks the 10th anniversary of this key European and international event on the policies and direction of the global navigation satellite systems.
The program has been posted online.
Planned 2012 discussions include:
By Inside GNSS
IFEN GmbH has begun shipping its new NavX-NCS Essential, a multi‐constellation and single‐frequency GNSS RF navigation constellation simulator mainly targeting consumer and automotive applications.
The new simulator was developed in cooperation with WORK Microwave GmbH, of Holzkirchen, Germany, a long-time partner of Poing, Germany– based IFEN.
By Inside GNSS
NovAtel GPStation-6NovAtel Inc. has introduced its GPStation-6 GNSS Ionospheric Scintillation and TEC Monitor (GISTM) receiver designed for ionospheric monitoring and space weather applications.
By Inside GNSS
IP Solutions ReGen software simulator GUITokyo, 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.
By Inside GNSS
FIGURE 1: GPS III On OrbitIn 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.
By Inside GNSS
Kai BorreDownload Easy Suite II (Adobe Acrobat PDF)
In 2009, Inside GNSS began a two-year occasional series by Danish geodesist Kai Borre called "GPS Easy Suite II: A Matlab Companion."
By Inside GNSS
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."
By Inside GNSS
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.
By Inside GNSS
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.
By Inside GNSS
Hotel Nikko New Century in Haidian, BeijingThis 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:
By Inside GNSS
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.
By Inside GNSS
