A team of Swiss researchers is using data from a network of GPS receivers and the technique of tomography to obtain profiles of how moisture is distributed with height, which might lead to better weather forecasts. By Simon Lutz, Marc Troller, Donat Perler, Alain Geiger, and Hans-Gert Kahle INNOVA...
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As NextGen air traffic management increasingly relies on GNSS for safety-critical functions, some form of backup is needed in the event of GNSS signal loss, whether due to intentional jamming or other causes. A group working under the auspices of the Federal Aviation Administration (FAA) Navigation ...
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A virtual reference station network covering a metropolitan area supplies position corrections to commuter buses equipped with a driver-assist system to enable safe operation, even under harsh weather conditions, along high-volume roadways. By Craig Shankwitz Bus-only shoulders on major traffic arte...
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By Jürgen Rossmann, Petra Krahwinkler, and Markus Emde Modern machines such as wood harvesters can automatically cut trees and remove branches, but an expert is still needed to plan a thinning and to mark the trees to be felled. The process can be accelerated if the forest ranger can virtually mar...
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This month’s professional OEM newsletter by Rob Lorimer is about the use of GPS and other positioning technologies in open-pit mining and compliments a GPS World webinar on this subject scheduled for 1 p.m. PST May 20. The article also appeared in the August 2010 issue of GPS World magazine with a...
Read More →By Brady O’Hanlon, Mark L. Psiaki, Paul M. Kintner Jr., and Steven P. Powell Anomalous behavior of the L1 C/A-code carrier phase has been detected on PRN07/SVN-48. The anomalies are sudden step-like changes of phase by about 10 degrees/5 millimeters. These steps are followed by negative steps ...
Read More →Galileo ICD, Free at Last The European Commission (EC) has published an updated Galileo Open Service Signal-In-Space Interface Control Document (OS SIS ICD) giving technical specifications and performance expectations for the future system. As reported by GPS World in October 2009, the EC will not c...
Read More →Perhaps we should call this The Interquel rather than The Sequel, as the latter will take place September 23 in Portland, Oregon, during the ION GNSS 2010 Conference. In January, 12 brave individuals joined me in San Diego to see if this thing would work at all. It did! The exercise revealed man...
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