From the Magazine

A WINS for Warfighters

July 30, 2015By
The current WINS form factor (left) sits beside a prototype for the future incarnation.

A new device is being developed to enable foot soldiers to find their exact location in GPS-denied situations. If satellite signals are blocked by heavy jungle canopy, or because of enemy interference, soldiers — and Headquarters — will still know where they are with the Warfighter Integrated Navigation System (WINS). read more

Steep Questions: How Tall is K2?

July 29, 2015By
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Surveying the world’s highest peaks is a daunting task. One international survey team set out to measure the Himalaya’s K2 peak, the second highest in the world after Mount Everest. read more

The Business — July 2015

July 1, 2015By

The Business section from the July 2015 issue. Download the PDF. Includes: JAVAD GNSS Launches Remote Assistance and Monitoring Services Hemisphere GNSS Debuts Atlas GNSS Correction Service OriginGPS Unveils Multi-GNSS Module with Antenna NovAtel G-III Reference Receiver Technology Chosen for QZSS Briefs Events read more

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Innovation: Seeing the Light

July 1, 2015By
FIGURE 2. GRD-based image correspondence illustration as a function of 2-D relative navigation state.

We look at the development of a generalized vision-aided integrity monitor for precision relative navigation applications. A vision-aided integrity monitor could be extremely valuable in augmenting existing precision relative navigation systems, such as GPS, for many different safety-critical aerospace applications. read more

Street Smart: 3D City Mapping and Modeling for Positioning with Multi-GNSS

July 1, 2015By
Figure 1. Example of the GNSS signal propagation using ray-tracing and a 3D building map.

A particle-filter-based positioning method using a 3D map to rectify the errors created by multipath and non-line-of-sight signals on the positioning result delivered by a low-cost single-frequency GPS receiver takes a multi-GNSS approach, using the combined signals of GPS, GLONASS and QZSS. The method outperforms conventional positioning in availability and positioning accuracy. It will likely be fused with other sensors in a future pedestrian navigation application. read more

Mobile Computing Product Showcase

June 29, 2015By
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From our July issue comes this showcase featuring products for surveyors, geographic information systems (GIS) professionals, field workers, and anyone who is looking to expand the capabilities of their smartphone or tablet. Dedicated Survey/Geospatial Three-Accuracy Series The LT500 series of handheld GPS receivers, LT500H/T/N, covers three accuracy ranges from sub-meter to centimeter. It is a cost-effective full GNSS positioning solution for survey,... read more

Innovation: Carrier-Phase RF Ranging

June 8, 2015By
FIGURE 10. Histogram showing carrier-phase range accuracy.

Precise, Accurate and Multipath-Resistant Distance and Speed Measurements
In this month’s column, we take a look at a short-distance two-way ranging system using a 5.8-GHz carrier to supply not only precise and accurate distance measurements but also complementary measurements of speed. read more

The Business — June 2015

June 1, 2015By

The Business section from the June 2015 issue. Download the PDF. Includes: Hemisphere GNSS Releases Next-Generation GNSS RTK Engine CHC Introduces LT500 Handheld Apple Buys Coherent Navigation Forsberg Acquires StarLink Products Trimble Module Combines GNSS, MEMS Airbus A350 Airliner Comes EGNOS-Capable Briefs Events read more

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