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Extremely low frequency plasma turbulence recorded by the DEMETER satellite in the ionosphere over the Abruzzi region prior to the April 6, 2009, L’Aquila earthquake
ionosphere turbulence earthquake
2015/8/24
The present study analyzes the low frequency fluctuations of the magnetic and electric fields prior to the earthquake with magnitude M.6.3 on April 6, 2009, in the Abruzzi region in Italy. This includ...
Providing Integrity for Satellite Navigation:Lessons Learned (Thus Far) from the Financial Collapse of 2008 – 2009
Providing Integrity Satellite Navigation Financial Collapse
2015/6/25
This paper examines the failures in risk assessment and risk management that contributed directly to the worldwide financial crisis of 2008 - 2009 and identifies lessons that are applicable to risk ma...
GPS Ephemeris Error Screening and Results for 2006–2009
GPS Ephemeris Error Screening Results
2015/6/25
For the Global Positioning System (GPS), real-time satel-lite orbits and clock biases are derived from predicted ephemeris and clock parameters in broadcast navigation messages. The performance of bro...