TAG: real-time kinematic

Leica Releases Viva GNSS Unlimited Series

June 3, 2014By
Leica_Viva_GS10-O

The Leica Viva GNSS Unlimited Series, available in August, will allow customers to make a safe investment with future-proof GNSS receivers and smart antennas, Leica Geosystems said in announcing the new series. With a flexible design, the Viva GNSS sensors can be upgraded for maximum performance whenever needed. The Leica Viva GNSS range fully supports the Chinese BeiDou navigation system.... read more

Centimeter-Level RTK Accuracy More and More Available — for Less and Less

February 4, 2014By
Eric Gakstatter

Last month, I started off 2014 with a bang by listing all the public RTK bases available in the United States, most of them being free. I received a lot of positive feedback and some enlightenment. For example, I didn’t know that in California, there are more than 330 RTK public base stations accessible by anyone for free via the... read more

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

Finally, A List of Public RTK Base Stations in the U.S.

January 7, 2014By

First of all, let me wish a Happy New Year to all my friends around the world and a prosperous 2014. I’m as excited as I’ve ever been about GNSS technology. If I may ask for forgiveness from you if you live outside of the United States, I’d like to start out answering a question I’ve been asked about for... read more

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

Network RTK for Intelligent Vehicles

February 1, 2013By
opener

Adoption of network real-time kinematic GNSS positioning can lead to major improvements in vehicle localization, although implementation must overcome some real-world challenges. This article assesses the extent of GNSS signal outage in a motorway environment. The average total GNSS outage period and the average time to resolve ambiguity for the network RTK solution can help assess complimentary sensors for a ubiquitous positioning system. read more

Leadership Awards 2012: Real-Time Kinematic in Your Palm

December 1, 2012By

This article reproduces the acceptance speeches given by the winners of GPS World’s 2012 Leadership Awards, at the Leadership Dinner in Nashville in September. The Leadership Dinner was sponsored by Lockheed Martin and Deimos Space. read more

This article is tagged with , , and posted in From the Magazine, Opinions

Real-Time Extended GNSS Positioning: A New Generation of Centimeter-Accurate Networks

July 1, 2012By
FIGURE 2. CenterPoint RTX tracking network distribution. (Click to enlarge.)

A new method brings together advantages of real-time kinematic (RTK) and precise point positioning (PPP) in a technique that does not require local reference stations, while still providing the the high productivity and accuracy of RTK systems with the extended coverage area of solutions based on global satellite corrections. The real-time centimeter-level accuracy without reference-station infrastructure is suitable for many market segments — and is applicable to multi-GNSS constellations. read more

The Kinematic GPS Challenge: First Gravity Comparison Results

March 14, 2012By

By Theresa Diehl The National Geodetic Survey (NGS) has issued a “Kinematic GPS Challenge” to the community in support of NGS’ airborne gravity data collection program, called Gravity for the Redefinition of the American Vertical Datum (GRAV-D). The “Challenge” is meant to provide a unique benchmarking opportunity for the kinematic GPS community by making available two flights of data from... read more

Innovation: Doppler-Aided Positioning

May 1, 2011By
Figure 1. Satellite tracking and carrier-phase anomaly summary during the observation time-span. These data were collected in a dense urban environment in both static and kinematic mode. The superimposed red-points show epochs where carrier-phase observables are either missing or contaminated with cycle slips, loss of locks, and/or other measurement anomalies.

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