Global Navigation Satellite Systems Engineering, Policy, and Design
Trimble has introduced its next generation AP Series of embedded GNSS-inertial OEM modules plus inertial measurement units (IMUs), featuring a 220-channel multi-frequency GNSS receiver with dual-antenna heading support.
The company announced the new products today (August 16, 2011) at AUVSI’s Unmanned Systems North America 2011 Conference and Exhibition.
By Inside GNSS
NovAtel Inc., announced today (August 16, 2011) the addition of four micro-electromechanical system (MEMS) inertial measurement units (IMUs) to its SPAN line of GNSS/INS products: the HG1900 and HG1930 IMUs from Honeywell International Inc. and the LandMark 20 and LandMark 40 IMUs from Gladiator Technologies Inc.
By Inside GNSS
Chris RizosThe founder of Australia’s largest concentration of GNSS research and development efforts has been named head of the International Association of Geodesy, part of the International Union of Geodesy and Geophysics (IUGG)
Chris Rizos put together the Satellite Navigation and Positioning laboratory (SNAP) at the University of New South Wales in the 1990s. He has been researching and writing about high precision technology and applications of GNSS since 1985 and is a professor and head of the surveying and spatial information school at the university.
By Inside GNSS
Find out more about 2011 USA Challenge applications ideas
Six judges — satellite navigation engineering experts from Stanford University, the Air Force Institute of Technology, Overlook Systems, NovAtel, KLA Global, the Institute of Navigation, and Inside GNSS — will select the finalists in the 2011 USA Challenge, one of 23 regional contests in this year’s European Satellite Navigation Competition (ESNC).
By Inside GNSS
One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder. 
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST
1. AQUARIUS
Buenos Aires, Argentina and Vandenberg AFB, California, USA
NovAtel OEM615 receiverNovAtel, Inc. has introduced the newest member of its OEM6 receiver family: the OEM615. Measuring only 46x71x11 millimeters (1.81×2.79×0.43 inches) and weighing 24 grams (0.84 ounces), the diminutive OEM615 provides precise positioning in a familiar, compact form factor.
By Inside GNSS
European Geostationary Navigation Overlay Service (EGNOS). ESA illustrationCiting European Space Agency (ESA) studies that showed “harmful interference” to Galileo receivers operating up to 1,000 kilometers from LightSquared base stations, a European Commission (EC) official has told the Federal Communications Commission (FCC) about his “deep concerns” about the wireless broadband company’s terrestrial transmissions in the 1525–1559 MHz band next to L1 GNSS frequencies.
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
Rathaus WilmersdorfThe International Symposium on Global Navigation Satellite Systems, Space-based and Ground-based Augmentation Systems and Aplications will take place at the Wilmersdorf in Berlin on October 10 and 11. The event will be held in English.
This year, the focus is on EUPOS, a ground-based European GNSS augmentation system, and on the regional geodetic reference frames and systems, ground-based GNSS infrastructures and technical developments in the field of DGNSS.
By Inside GNSS
El Fortin monument in Heredia, Costa RicaSIRGAS 2011, the annual working meeting of the organization in charge of the geocentric reference system for the Americas, will be held in Heredia, Costa Rica from August 8 to 10.
It will take place in Clodomiro Picado Twight auditorium at the Omar Dengo campus of the National University of Costa Rica.
By Inside GNSS
NavtechGPS will offer its 2011 east coast GNSS technical seminars at the Doubletree Hotel in Annapolis, Maryland from Monday, July 11 through Friday, July 15.
Over 25 years, NavtechGPS has organized basic and advanced GNSS seminars for engineers and technical professionals all over the United States and has provided GPS/GNSS applications solutions for military and research customers, with product choices from more than 30 manufacturers.
By Inside GNSS
