GPS World, February 2018

MONITORING OF WIDE AREA OSCILLATIONS IN PRESENCE OF GPS SPOOFING ATTACKS By Yongqiang Wang and Aranya Chakrabortty Clemson University IEEE Power and Energy Society General Meeting September 2017 P hasor Measurement Units PMU are playing an increasingly important role in wide area monitoring and control of power systems PMUs allow synchronous real time measurements of voltage phase angle and frequency from multiple remote locations in the grid enabled by their ability to align to GPS clocks Given that this ability is vulnerable to GPS spoofing attacks which have been confirmed easy to launch this paper proposes a distributed real time wide area oscillation estimation approach that is robust to GPS spoofing on PMUs and their associated Phasor Data Concentrators PDCs The approach employs the idea of checking update consistency across distributed nodes and can tolerate up to one third of compromised nodes Numerical simulations confirmed the effectiveness of the proposed approach The lead author an assistant professor of electrical and computer engineering at Clemson leads a team that received 1 million from the National Science Foundation to fortify computers and devices against cyberattacks associated with timekeeping We want to provide secure timing solutions by securing the two most commonly used time distribution approaches GPS receivers and NTP Galactic Continued from page 12 GPS level accuracy on the order of a meter or less is not necessary when navigating the far reaches of the solar system where distances between objects measure in the millions of miles In deep space we hope to reach accuracies in the hundreds of feet said Mitchell Next Steps The team will now focus on updating and fine tuning both flight and ground software in preparation for a second experiment later in 2018 The ultimate goal which may take years to realize is to develop detectors and other hardware to make pulsar based navigation readily available on future spacecraft To advance the technology for operational use teams will focus on reducing the size weight and power requirements and improving the sensitivity of the instruments The SEXTANT team now also is discussing the possible application of X ray navigation to support human spaceflight If an interplanetary mission to the moons of Jupiter or Saturn were equipped with such a navigational device for example it would be able to calculate its location autonomously for long periods of time without communicating with Earth This successful demonstration firmly establishes the viability of X ray pulsar navigation as a new autonomous navigation capability We have shown that a mature version of this technology could enhance deep space exploration anywhere within the solar system and beyond said project manager Jason Mitchell ADVERTISER INDEX COMPANIES FEATURED IN THIS ISSUE ADVERTISER PAGE S CAST NAVIGATION INSIDE FRONT COVER GEO BUSINESS CONFERENCE 33 GENEQ 45 INSTITUTE OF NAVIGATION ION 41 JAVAD 19 26 LIDAR USA 13 MUNICH SATELLITE NAVIGATION SUMMIT 8 NEARMAP 31 NOVATEL BACK COVER ADVERTISER PAGE S PANASONIC 5 RACELOGIC INSIDE BACK COVER ROHDE SCHWARZ 11 SBG SYSTEMS 29 SEPTENTRIO 9 SPIRENT FEDERAL 7 SUZHOU FOIF 47 TALEN X 17 UNICORE COMMUNICATIONS 15 FEBRUARY 2018 WWW GPSWORLD COM GPS WORLD 49