Archives

Innovation: Doppler-Aided Positioning

May 1, 2011 - By

Improving Single-Frequency RTK in the Urban Enviornment
A look at how Doppler measurements can be used to smooth noisy code-based pseudoranges to improve the precision of autonomous positioning as well as to improve the availability of single-frequency real-time kinematic positioning, especially in urban environments. read more

This article is tagged with , and posted in Algorithms & Methods, From the Magazine, Innovation

The System: Second Report by LightSquared/GPS Technical Working Group Maps Terrain, Does Not Yet Explore

May 1, 2011 - By

Plus: GLONASS CDMA Tracked, Third Beidou-2 Launched The second report from non‐governmental members of the LightSquared/GPS Technical Working Group (TWG) was filed with the Federal Communications Commission (FCC) on April 15. For those anxious to see actual results of interference/desensitization of GPS receivers by the proposed LightSquared terrestrial signal — or, conversely, absence of said results — the report does not contain... read more

This article is tagged with , and posted in GNSS, The System

Position: 20 Kilometers, Heavy Construction

May 1, 2011 - By

The Fehmarnbelt Positioning System between Denmark and Germany includes a geodetic basis, four permanent GNSS stations, and a real-time kinematic (RTK) service for construction of a road and rail causeway between the islands of Fehmarn, Germany, and Lolland, Denmark across the Fehmarnbelt, a 20-kilometer stretch of open water in the Baltic Sea. This homogeneous, consistent, coherent, highly accurate GNSS-based positioning system exemplifies comparable systems and services that can be established for any major construction site or infrastructure project. Now in use for environmental, geotechnical, and geophysical investigations, it provides cost-efficient operations and facilitates the precise navigation of large, costly offshore equipment. read more

This article is tagged with , , , and posted in Construction, Survey

On the Edge: Driving Reality Home

May 1, 2011 - By

A new navigation system looks to make driving safer by removing the need for drivers to look away from the road at their navigation device. With Wikitude Drive, as a driver moves down the road, the route is “drawn” onto the live video screen of an Android smartphone. How is this possible? Augmented reality. read more

Opening Up Indoors: Japan’s Indoor Messaging System, IMES

May 1, 2011 - By

An indoor messaging system (IMES) has been developed to meet the challenges of indoor and deep indoor positioning, as a system that can be implemented in any device that has a GPS/GNSS receiver without hardware modification. IMES can provide reliable 3D position data with a single transmitter device without performing range calculation. read more

This article is tagged with , , , , and posted in Indoor Positioning, LBS/Wireless