Survey and Mapping Archives - Page 17 of 27 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Survey and Mapping

Spoofs, Proofs & Jamming
September 3, 2012

Spoofs, Proofs & Jamming

TABLE 1. Spoofer antenna requirements for various hardened GPS signal types

“Here is Edward Bear, coming downstairs now, bump, bump, bump, on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn’t.”
– A.A. Milne, Winnie-the-Pooh

Is our faith in the integrity and infallibility of the Global Positioning System misplaced or, perhaps, insufficiently grounded?

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By Inside GNSS
Trimble Launches AP20-C GNSS Inertial OEM Module MEMS Sensors
August 7, 2012

Trimble Launches AP20-C GNSS Inertial OEM Module MEMS Sensors

Trimble AP20-C GNSS/inertial OEM board with MEMS sensors

Trimble introduced its AP20-C, the latest addition to its AP Series of embedded GNSS-inertial OEM boards, at AUVSI’s Unmanned Systems North America 2012 Conference and Exhibition today (August 7, 2012).

Incorporating a compact, custom-built inertial measurement unit (IMU) based on commercial micro-electromechanical mechnical system (MEMS) sensors, the AP20-C enables system integrators to achieve high-rate position and orientation measurements with exceptional accuracy, according to the company.

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By Inside GNSS
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SIDEBAR: Flight Control and Target Identification Requirements and Results with EGNOS and Multi-Constellation GNSS

SIDEBAR: Flight Control and Target Identification Requirements and Results with EGNOS and Multi-Constellation GNSS

Return to main article: "Drones to the Rescue!"

Following a route defined by application requirements and remotely sensing the environment in order to analyze and interpret the outcome on- and off-line: this is the axioma of every aerial remote-sensing mission and, indeed, also for search missions. Yet, the specific requirements for navigation might vary according to the application.

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By Inside GNSS
Drones to the Rescue!
July 5, 2012

Drones to the Rescue!

August 1994, early morning. Spain’s Central Pyrenees Mountains still in darkness.

At the outset of an ascent to a 3,000-meter peak along the international border, one of the co-authors encounters a group of tourist hikers who have begun searching for a colleague who had left the camp the previous evening. In the pre-sunrise gloom, helicopters cannot yet operate.

A week later, the body of the hiker is found. The rescue efforts came, unfortunately, too late.

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By Inside GNSS
Leica Geosystems and Locata Extend Technology Partnership
June 18, 2012

Leica Geosystems and Locata Extend Technology Partnership

Leica Geosystems Mining and Locata Corporation will continue their exclusive technology partnership in the mine machine automation and mine fleet management markets until at least June 2014. The extension guarantees the ongoing, commercial provision to the global mining industry of the Leica Jigsaw Positioning System (Jps), powered by Locata technology.

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By Inside GNSS
New Navigator Seminar
June 8, 2012

New Navigator Seminar

Business School, University of Nottingham Jubilee Campus

The Royal Institute of Navigation will hold a new navigator seminar and networking opportunity at the University of Nottingham on June 14, 2012 for new navigators, engineers, scientists and surveyors who are seeking careers in the industry.

Masters and doctoral level students will present on navigation and positioning topics, advanced undergraduates and postdocs will be in attendance. A number of industry and government representatives will exhibit or attend to listen to new research and meet the new talent.

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By Inside GNSS
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GSA Issues Second GNSS Market Report: 1.1 Billion Units by 2020
May 31, 2012

GSA Issues Second GNSS Market Report: 1.1 Billion Units by 2020

The European GNSS Agency (GSA) has published its second GNSS market report, including a special focus on maritime and surveying application markets and refining its projections of unit and sales revenue volumes through 2020.

According to the new GSA report, the worldwide GNSS market is growing rapidly with total market size expected to increase at an average of 13 percent per year until 2016. At that point, increasing market saturation, price erosion, and platform convergence will reduce the growth rate.

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By Inside GNSS
NovAtel, Interstate Electronics Team on SAASM RTK Receiver Board
May 30, 2012

NovAtel, Interstate Electronics Team on SAASM RTK Receiver Board

NovAtel Inc. today (May 30, 2012) announced the development of their OEM625S Selective Availability/Anti-Spoofing Module (SAASM) GNSS receiver, the first product emerging from a collaborative effort with L-3 Interstate Electronics Corporation (IEC).

The OEM625S, which becomes available for purchase in the third quarter of this year, will combine a commercial dual-frequency NovAtel GNSS receiver with an L-3 IEC XFACTOR SAASM in a single card solution, reducing overall size and power requirements for end customer applications.

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By Inside GNSS
Demystifying GLONASS Inter-Frequency Carrier Phase Biases
May 25, 2012

Demystifying GLONASS Inter-Frequency Carrier Phase Biases

EQUATIONS 1 -11

GLONASS currently uses a frequency division multiple access (FDMA) technique to distinguish the signals coming from different satellites in the Russian GNSS constellation. The GLONASS L1 and L2 bands are divided into 14 sub-bands, and each satellite transmits in one of these.

The sub-bands are identified by frequency numbers k, from -7 to 6. The GLONASS L1 and L2 carrier frequencies, in hertz, at a frequency number k are defined by:

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By Inside GNSS
Truth on the Range

Truth on the Range

Typical Rack-Mounted UHARS System

A next-generation “truth” reference system for the U.S. Air Force (USAF) — the Ultra High Accuracy Reference System (UHARS) — is currently under development by the 746th Test Squadron (746 TS) at Holloman Air Force Base, New Mexico.

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By Inside GNSS
TRANSNAV 2013: Marine Navigation and Safety of Sea Transportation
May 23, 2012

TRANSNAV 2013: Marine Navigation and Safety of Sea Transportation

Transnav 2011

The 10th TRANSNAV symposium will be held June 19-21, 2013 at Gdynia, Poland, a seaport and resort city on the south coast of the Baltic.

The biennial event is an opportunity for scientists and professionals in navigation, transport, ocean engineering and maritime technology to share knowledge and research on all aspects of maritime navigation and safety of sea transportation. The symposium is held in English.

The organizers expect 300 participants from 50 countries or more.

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By Inside GNSS
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