1 Fusion of Carrier-Phase Differential GPS, Bundle-Adjustment-Based Visual SLAM, and Inertial Navigation for Precisely and Globally-Registered Augmented Reality Masters Thesis Daniel Shepard 2013
2 A Probabilistic Framework for Global Navigation Satellite System Signal Timing Assurance Conference Paper Kyle Wesson, Brian Evans, Todd Humphreys Under Review
3 GPS Vulnerabilities and Implications for Telecom Presentation Todd Humphreys 2013
4 GAIN: Collaborative Opportunistic Navigation Poster Zak Kassas, Todd Humphreys 2013
5 UAV Integration: Privacy and Security Hurdles Presentation Todd Humphreys 2013
6 Extreme GPS: Limits of Security & Precision Presentation Todd Humphreys 2013
7 Secure Navigation and Timing Presentation Todd Humphreys 2012
8 Future Directions in GNSS Research Presentation Todd Humphreys 2012
9 Evaluation of the Vulnerability of Phasor Measurement Units to GPS Spoofing Journal Paper Daniel Shepard, Todd Humphreys, Aaron Fansler 2012
10 Highlight: Collaborative Opportunistic Navigation Magazine Article Zak Kassas To Appear
11 Position Paper: Secure Time Transfer for CPS White Paper Kyle Wesson, Todd Humphreys, Brian Evans 2012
12 Probabilistic Secure Time Transfer: Challenges and Opportunities in a Sub-Millisecond World Presentation Kyle Wesson, Todd Humphreys, Brian Evans 2012
13 Statement on Privacy Issues Related to the Domestic Use of Unmanned Aerial Vehicles Testimony Todd Humphreys 2012
14 The Texas Spoofing Test Battery: Toward a Standard for Evaluating GPS Signal Authentication Techniques Conference Paper Todd Humphreys, Todd Humphreys, Jahshan Bhatti, Daniel Shepard, Kyle Wesson 2012
15 Observability and Estimability of Collaborative Opportunistic Navigation with Pseudorange Measurements Conference Paper, Presentation Zak Kassas, Todd Humphreys 2012
16 Evaluation of Smart Grid and Civilian UAV Vulnerability to GPS Spoofing Attacks Conference Paper, Presentation Daniel Shepard, Jahshan Bhatti, Todd Humphreys, Aaron Fansler, Todd Humphreys, Aaron Fansler 2012
17 Precise Augmented Reality Enabled by Carrier-Phase Differential GPS Conference Paper, Presentation Daniel Shepard, Ken Pesyna Jr, Todd Humphreys 2012
18 Practical Cryptographic Civil GPS Signal Authentication Journal Paper Kyle Wesson, Mark Rothlisberger, Todd Humphreys 2012
19 Going Up Against Time: The Power Grid’s Vulnerability to GPS Spoofing Attacks Trade Magazine Article Daniel Shepard, Todd Humphreys, Aaron Fansler 2012
20 Drone Hack: Spoofing Attack Demonstration on a Civilian Unmanned Aerial Vehicle Trade Magazine Article Daniel Shepard, Jahshan Bhatti, Todd Humphreys 2012
21 Secure Civil Navigation and Timing Presentation Todd Humphreys 2012
22 Statement on the Vulnerability of Civil Unmanned Aerial Vehicles and Other Systems to Civil GPS Spoofing Testimony Todd Humphreys 2012
23 Observability Analysis of Opportunistic Navigation with Pseudorange Measurements Conference Paper, Presentation Zak Kassas, Todd Humphreys 2012
24 Detection Strategy for Cryptographic GNSS Anti-Spoofing Journal Paper Todd Humphreys To Appear
25 GPS Spoofing Detection via Dual-Receiver Correlation of Military Signals Journal Paper Mark Psiaki, Brady O'Hanlon, Jahshan Bhatti, Daniel Shepard, Todd Humphreys To Appear
26 Constructing a Continuous Phase Time History from TDMA Signals for Opportunistic Navigation Conference Paper, Presentation, Video Presentation Ken Pesyna Jr, Zak Kassas, Todd Humphreys 2012
27 Development and Demonstration of a TDOA-Based GNSS Interference Signal Localization System Conference Paper Jahshan Bhatti, Todd Humphreys, Brent Ledvina 2012
28 Collaborative Opportunistic Navigation Poster Zak Kassas, Ken Pesyna Jr, Todd Humphreys 2012
29 The GPS Dot and Its Discontents: Privacy vs. GNSS Integrity Trade Magazine Article Todd Humphreys 2012
30 Evaluation of the Vulnerability of Phasor Measurement Units to GPS Spoofing Attacks Conference Paper Daniel Shepard, Todd Humphreys, Aaron Fansler 2012
31 Development and Testing of a Minaturized, Dual-Frequency GPS Receiver for Space Applications Conference Paper, Presentation Andrew Joplin, Glenn Lightsey, Todd Humphreys 2012
32 Straight Talk on Anti-Spoofing: Securing the Future of PNT Trade Magazine Article Kyle Wesson, Daniel Shepard, Todd Humphreys 2012
33 Know Your Enemy: Signal Characteristics of Civil GPS Jammers Trade Magazine Article Ryan Mitch, Ryan Dougherty, Mark Psiaki, Steven Powell, Brady O'Hanlon, Jahshan Bhatti, Todd Humphreys 2012
34 A Testbed for Developing and Evaluating GNSS Authentication Techniques Journal Paper Todd Humphreys, Daniel Shepard, Jahshan Bhatti, Kyle Wesson In Preparation
35 Development and Testing of a Miniaturized, Dual-Frequency, Software-Defined GPS Receiver for Space Applications Masters Thesis Andrew Joplin 2011
36 A Collection of Observations and Advice on University Teaching White Paper Todd Humphreys 2011
37 Radionavigation Robustness and Security Presentation Todd Humphreys 2011
38 CubeSat-Sized GNSS Radio Occultation Experiments Presentation Todd Humphreys 2011
39 GPS-assisted Femtocell Synchronization and Localization Through Tightly-Coupled Opportunistic Navigation Poster Ken Pesyna Jr, Kyle Wesson, Robert Heath Jr, Todd Humphreys 2011
40 Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor Positioning Presentation, Conference Paper Ken Pesyna Jr, Zak Kassas, Jahshan Bhatti, Todd Humphreys 2011
41 Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor Positioning Poster Zak Kassas, Ken Pesyna Jr, Jahshan Bhatti, Todd Humphreys 2011
42 Characterization of Receiver Response to a Spoofing Attack Presentation, Conference Paper Daniel Shepard, Todd Humphreys 2011
43 An Evaluation of the Vestigial Signal Defense for Civil GPS Anti-Spoofing Presentation, Conference Paper Kyle Wesson, Daniel Shepard, Jahshan Bhatti, Todd Humphreys 2011
44 A Proposed Navigation Message Authentication Implementation for Civil GPS Anti-Spoofing Presentation, Conference Paper Kyle Wesson, Mark Rothlisberger, Todd Humphreys 2011
45 Civilian GPS Spoofing Detection based on Dual-Receiver Correlation of Military Signals Conference Paper Mark Psiaki, Brady O'Hanlon, Jahshan Bhatti, Daniel Shepard, Todd Humphreys 2011
46 Signal Characteristics of Civil GPS Jammers Conference Paper Ryan Mitch, Ryan Dougherty, Mark Psiaki, Steven Powell, Brady O'Hanlon, Jahshan Bhatti, Todd Humphreys 2011
47 CASES: A Smart, Compact GPS Software Receiver for Space Weather Monitoring Conference Paper Brady O'Hanlon, Mark Psiaki, Steven Powell, Jahshan Bhatti, Todd Humphreys, Geoff Crowley, Gary Bust 2011
48 CASES: A Novel Low-Cost Ground-based Dual-Frequency GPS Software Receiver and Space Weather Monitor Conference Paper Geoff Crowley, Gary Bust, Adam Reynolds, Irfan Azeem, Rick Wilder, Brady O'Hanlon, Mark Psiaki, Steven Powell, Todd Humphreys, Jahshan Bhatti 2011
49 Extending the Reach of GPS-assisted Femtocell Synchronization and Localization Through Tightly-Coupled Opportunistic Navigation Conference Paper, Video Presentation, Presentation Ken Pesyna Jr, Kyle Wesson, Robert Heath Jr, Todd Humphreys 2011
50 GPS Spoofing and the Financial Sector White Paper Todd Humphreys 2011
51 Characterization of Receiver Response to Spoofing Attacks Undergraduate Honors Thesis Daniel Shepard 2011
52 State of the Art and Future Trends in Radionavigation Presentation Todd Humphreys 2011
53 Indoor GPS: Tightly Coupled Opportunistic Navigation Poster Ken Pesyna Jr, Kyle Wesson, Jahshan Bhatti, Todd Humphreys 2010
54 GPS Spoofing Detection System Poster Brady O'Hanlon, Mark Psiaki, Jahshan Bhatti, Todd Humphreys 2010
55 Spoofing the Timing Signal: What Else is Vulnerable? Presentation Todd Humphreys 2010
56 The GPS Assimilator: a Method for Upgrading Existing GPS User Equipment to Improve Accuracy, Robustness, and Resistance to Spoofing Conference Paper, Presentation Todd Humphreys, Jahshan Bhatti, Brent Ledvina 2010
57 Opportunistic Frequency Stability Transfer for Extending the Coherence Time of GNSS Receiver Clocks Conference Paper, Presentation Kyle Wesson, Ken Pesyna Jr, Jahshan Bhatti, Todd Humphreys 2010
58 Advances in GNSS Equipment Presentation Todd Humphreys 2010
59 GNSS Assimilator: A method for upgrading existing GNSS user equipment to improve accuracy, robustness, and resistance to spoofing Trade Magazine Article Todd Humphreys, Brent Ledvina 2010
60 Frontiers in Radionavigation Presentation Todd Humphreys 2010
61 Radionavigation Integrity Presentation Todd Humphreys 2010
62 Riding out the rough spots: Scintillation-robust GNSS carrier tracking Presentation Todd Humphreys 2010
63 A data-driven testbed for evaluating GPS carrier tracking loops in ionospheric scintillation Journal Paper Todd Humphreys, Mark Psiaki, Brent Ledvina, Alessandro Cerruti, Paul Kintner Jr 2010
64 Modeling the effects of ionospheric scintillation on GPS carrier phase tracking Journal Paper Todd Humphreys, Mark Psiaki, Paul Kintner Jr 2010
65 Development and Field Testing of a DSP-Based Dual-Frequency Software GPS Receiver Conference Paper Brady O'Hanlon, Mark Psiaki, Paul Kintner Jr, Todd Humphreys 2009
66 Receiver-Autonomous Spoofing Detection: Experimental Results of a Multi-antenna Receiver Defense Against a Portable Civil GPS Spoofer Conference Paper Paul Montgomery, Todd Humphreys, Brent Ledvina 2009
67 Assessing the Civil GPS Spoofing Threat Presentation Todd Humphreys, Jahshan Bhatti, Brent Ledvina, Mark Psiaki, Brady O'Hanlon, Paul Kintner Jr, Paul Montgomery 2009
68 Exploiting Multicore Technology in Software-Defined GNSS Receivers Conference Paper Todd Humphreys, Jahshan Bhatti, Thomas Pany, Brent Ledvina, Brady O'Hanlon 2009
69 Simulating Ionosphere-Induced Scintillation for Testing GPS Receiver Phase Tracking Loops Journal Paper Todd Humphreys, Mark Psiaki, Joanna Hinks, Brady O'Hanlon, Paul Kintner Jr 2009
70 A Multi-Antenna Defense: Receiver-Autonomous GPS Spoofing Detection Trade Magazine Article Paul Montgomery, Todd Humphreys, Brent Ledvina 2009
71 GNSS and Ionospheric Scintillation: How to Survive the Next Solar Maximum Trade Magazine Article Paul Kintner Jr, Todd Humphreys, Joanna Hinks 2009
72 Evaluating GPS Receiver Robustness to Ionospheric Scintillation Conference Paper Joanna Hinks, Todd Humphreys, Brady O'Hanlon, Mark Psiaki, Paul Kintner Jr 2008
73 Assessing the Spoofing Threat: Development of a Portable GPS Civilian Spoofer Conference Paper Todd Humphreys, Brent Ledvina, Mark Psiaki, Brady O'Hanlon, Paul Kintner Jr, Brent Ledvina 2008
74 Considerations for Future IGS Receivers Conference Paper Todd Humphreys, Larry Young, Thomas Pany 2008
75 A Technique for Determining the Carrier Phase Differences between Independent GPS Receivers during Scintillation Conference Paper Shan Mohiuddin, Todd Humphreys, Mark Psiaki 2007
76 Searching for Galileo Conference Paper Mark Psiaki, Todd Humphreys, Shan Mohiuddin, Steven Powell, Alessandro Cerruti, Paul Kintner Jr 2006
77 GNSS Receiver Implementation on a DSP: Status, Challenges, and Prospects Conference Paper Todd Humphreys, Mark Psiaki, Paul Kintner Jr, Brent Ledvina 2006
78 The Semidiurnal Variation in GPS-derived Zenith Neutral Delay Journal Paper Todd Humphreys, Michael Kelley, Norbert Huber, Paul Kintner Jr 2005
79 GPS Carrier Tracking Loop Performance in the presence of Ionospheric Scintillations Conference Paper Todd Humphreys, Mark Psiaki, Paul Kintner Jr, Brent Ledvina 2005
80 Analysis of Ionospheric Scintillations using Wideband GPS L1 C/A Signal Data Conference Paper Todd Humphreys, Brent Ledvina, Mark Psiaki, Paul Kintner Jr 2004

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