August 17, 2017

Air Force Weighs Shorter Lived GPS Satellites 
The U. S. Air Force is weighing shortening the design life of the GPS satellites it buys after it finishes filling out the constellation with the final tranche of GPS III spacecraft. (more)


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Feature Selection for GNSS Receiver Fingerprinting 
Fingerprinting is the process of gathering information about an electronic device to generate specific signatures to identify the device itself. This working paper investigates potential strategies for fingerprinting a GNSS receiver. Several metrics computed from the time series provided by the receiver are analyzed and considered as candidate features for fingerprinting. It is shown that features computed from the receiver clock drift are the most appropriate to determine the receiver signature. Three clock-derived metrics are sufficient to determine a receiver fingerprint and to build a "white list" for receiver identification.  ( more )  
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NASA Statement, Website, Address How Total Eclipse May Impact GNSS 
By now, we've all heard plenty about the upcoming eclipse of the sun. On Monday, August 21, all of North America will be treated to an eclipse of the sun, and the rare event is creating quite a buzz, so much so that NASA developed a website to offer guidance and has issued a statement about its effect on GNSS users.  ( more )  

DHS hosts 2017 First Responder Electronic Jamming Exercise
The U.S. Department of Homeland Security (DHS) Science and Technology Directorate (S&T) is resolute in making first responders safer and more aware of jamming and its potential impact to their communications, safety and ability to execute their mission. S&T is combatting jamming threats by evaluating the threat, developing and testing mitigation technologies, working with public safety agencies to update training procedures, and raising awareness of jamming threats and characteristics. ( more )  

How is Public Safety reliant on GNSS and is this a concern?
"GNSS Solutions" is a regular column featuring questions and answers about technical aspects of GNSS. Readers are invited to send their questions to the columnist, Dr. Mark Petovello, Department of Geomatics Engineering, University of Calgary, who will find experts to answer them. ( more)
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