Publications

TitleAuthorsTypeYear
Carrier-phase and IMU based GNSS Spoofing Detection
for Ground Vehicles
Z. Clements, J.E. Yoder, T.E. HumphreysConference Paper2022
Low-Cost Inertial Aiding for Deep-Urban
Tightly-Coupled Multi-Antenna Precise GNSS
J.E. Yoder, T.E. Humphreys
Journal PaperUnder Review
Analysis of OFDM Signals for Ranging and CommunicationsA.M. Graff, W.N. Blount, P.A. Iannucci, J.G. Andrews, T.E. HumphreysConference Paper2021
Optimized Bit-Packing for Bit-Wise Software-Defined GNSS RadioZ. Clements, P.A. Iannucci, T.E. HumphreysConference Paper2021
Orbital War Driving: Assessing Transient GPS Interference from LEOD.M. LaChapelle, L. Narula, T.E. HumphreysConference Paper2021
Autonomous Signal-Situational-Awareness in a Terrestrial Radionavigation SystemR.X.T. Kor, P.A. Iannucci, T.E. HumphreysConference Paper2021
A Proposal for Securing Terrestrial Radio-Navigation SystemsR.X.T. Kor, P.A. Iannucci, L. Narula, T.E. HumphreysConference Paper2020
Multi-Antenna Vision-and-Inertial-Aided CDGNSS for Micro Aerial Vehicle Pose EstimationJ.E. Yoder, P.A. Iannucci, L. Narula, T.E. HumphreysConference Paper2020
Open-World Virtual Reality Headset TrackingT.E. Humphreys, R.X.T. Kor, P.A. Iannucci, J.E. YoderConference Paper2020
Long Range, Low SWaP-C FMCW RadarW.A. Lies, L. Narula, P.A. Iannucci, T.E. HumphreysJournal Paper2021
First results from three years of GNSS Interference Monitoring from Low Earth OrbitM.J. Murrian, L. Narula, P.A. Iannucci, S. Budzien, B.W. O'Hanlon, M.L. Psiaki, T.E. HumphreysJournal Paper2021
Towards All-Weather sub-50-cm Radar-Inertial PositioningL. Narula, P.A. Iannucci, T.E. HumphreysJournal Paper2021
Cross-Modal Localization: Using Automotive Radar for Absolute Geolocation within a Map Produced with Visible-Light ImageryP.A. Iannucci, L. Narula, T.E. HumphreysConference Paper2020
Economical Fused LEO GNSSP.A. Iannucci, T.E. HumphreysConference Paper2020
Intercepting Unmanned Aerial Vehicle Swarms with Neural-Network-Aided Game-Theoretic Target AssignmentN.G. Montalbano, T.E. HumphreysConference Paper2020
Low SWaP-C Radar for Urban Air MobilityW.A. Lies, L. Narula, P.A. Iannucci, T.E. HumphreysConference Paper2020
Automotive-Radar-Based 50-cm Urban PositioningL. Narula, P.A. Iannucci, T.E. HumphreysConference Paper2020
TEX-CUP: The University of Texas Challenge for Urban PositioningL. Narula, D.M. LaChapelle, M.J. Murrian, J.M. Wooten, T.E. Humphreys, E. de Toldi, G. Morvant, J-B LacambreConference Paper2020
Automotive Collision Risk Estimation Under Cooperative SensingD.M. LaChapelle, T.E. Humphreys, L. Narula, P.A. Iannucci, E. Moradi-PariConference Paper2020
Deep-Urban Unaided Precise Global Navigation Satellite System Vehicle PositioningT.E. Humphreys, L. Narula, M.J. MurrianJournal Paper2020
Accuracy Limits for Globally-Referenced Digital Mapping Using Standard GNSSL. Narula, M.J. Murrian, T.E. HumphreysConference Paper2018
Accurate Collaborative Globally-Referenced Digital Mapping with Standard GNSSL. Narula, J.M. Wooten, M.J. Murrian, D.M. LaChapelle, T.E. HumphreysJournal Paper2018
A Comparison of Methods for Online Lever Arm Estimation in GPS/INS IntegrationN. Montalbano, T.E. HumphreysConference Paper2018
Exploiting a Prior 3D Map for Object RecognitionS. Kaki, T.E. Humphreys, M. AkellaUndergraduate Honors Thesis2018
Position Domain Integrity Analysis for Generalized Integer Aperture BootstrappingG.N. Green, T.E. HumphreysJournal Paper2018
Data-Driven Generalized Integer Aperture Bootstrapping for High-Integrity PositioningG.N. Green, T.E. HumphreysJournal Paper2018
Low-cost Precise Vehicular Positioning in Urban EnvironmentsT.E. Humphreys, M.J. Murrian, L. NarulaConference Paper2018
Advanced Techniques for Safety-of-Life Carrier Phase Differential GNSS Positioning with Applications to Triplex ArchitecturesG.N. GreenPh.D. Dissertation2017
Requirements for Secure Clock SynchronizationL. Narula, T.E. HumphreysJournal Paper2018
Assured Navigation and TimingT. E. HumphreysPresentation2017
Robust Precise LocationT. E. HumphreysPresentation2017
Counter UAV ChallengesT. E. HumphreysPresentation2017
Exploiting antenna motion for faster initialization of centimeter-accurate GNSS positioning with low-cost antennasK. M. Pesyna, Jr., T. Novlan, C. Zhang, R. W. Heath, Jr., and T. E. HumphreysJournal Paper2017
GNSS Signal Authentication via Power and Distortion MonitoringK. D. Wesson, J. Gross, T. E. Humphreys, and B. L. EvansJournal Paper2017
Low-cost Precise Urban PositioningT.E. HumphreysPresentation2016
Secure Perception in Connected VehiclesT.E. Humphreys, L. NarulaPoster2016
Dense RTK: Mass-Market Positioning for Automated VehiclesT.E. HumphreysPresentation2016
Low-cost Precise Positioning for Automated VehiclesM.J. Murrian, C.W. Gonzalez, T.E. Humphreys, K.M. Pesyna, Jr, D.P. Shepard, A.J. KernsTrade Magazine Article2016
Attackers can spoof navigation signals without our knowledge. Here's how to fight back GPS liesT.E. Humphreys, M.L. Psiaki, B. StaufferMagazine Article2016
Data-Driven Generalized Integer Aperture Bootstrapping for Real-Time High Integrity ApplicationsG.N. Green, M. King, T.E. HumphreysConference Paper2016
Requirements for Secure Wireless Time TransferL. Narula, T.E. HumphreysConference Paper2016
On the Feasibility of cm-Accurate Positioning via a Smartphone’s Antenna and GNSS ChipT.E. Humphreys, M.J. Murrian, F. van Diggelen, S. Podshivalov, K.M. PesynaConference Paper2016
A Dense Reference Network for Mass-Market Centimeter-Accurate PositioningM.J. Murrian, C.W. Gonzalez, T.E. HumphreysConference Paper2016
GNSS Spoofing and DetectionM.L. Psiaki, T.E. HumphreysJournal Paper2016
Sensor Deception Detection and Radio-Frequency Emitter LocalizationJ.A. BhattiPh.D. Dissertation2015
Advanced Techniques for Centimeter-Accurate GNSS Positioning on Low-Cost Mobile PlatformsK.M. PesynaPh.D. Dissertation2015
Fault Free Integrity of Mid-Level Voting for Triplex Differential GPS SolutionsG.N. Green, M. King, T.E. HumphreysConference Paper2015
Toughening Techniques for GPS Receivers: Navigation Message AuthenticationT.E. HumphreysPresentation2015
Statement on the Security Threat Posed by Unmanned Aerial Systems and Posssible CountermeasuresT.E. HumphreysTestimony2015
Accuracy in the Palm of Your HandK.M. Pesyna, R.W. Heath, T.E. HumphreysTrade Magazine Article2015
Development of a Micro-Mobility Analysis System Using Precise GPS TracesS. MukherjiUndergraduate Honors Thesis2014
GNSS SecurityT. HumphreysPresentation2014
Centimeter Positioning with a Smartphone-Quality GNSS AntennaK.M. Pesyna, R.W. Heath, T.E. HumphreysConference Paper2014
Adaptive Estimation of Signals of OpportunityZ.M. Kassas, V. Ghadiok, T.E. HumphreysConference Paper2014
GNSS Vulnerabilities and ThreatsT. HumphreysPresentation2014
GNSS Spoofing Detection using Two-Antenna Differential Carrier PhaseM.L. Psiaki, B.W. O'Hanlon, S.P. Powell, J.A. Bhatti, K.D. Wesson, T.E. Humphreys, A. SchofieldConference Paper2014
A Testbed for Developing and Evaluating GNSS Authentication TechniquesT.E. Humphreys, J.A. Bhatti, D.P. Shepard, and K.D. WessonConference Paper2014
Secure Navigation and Timing Without Local Storage of Secret KeysK. WessonPh.D. Dissertation2014
Ionospheric irregularities during a substorm event: Observations of ULF pulsations and GPS scintillationsH. Kim, C.R. Clauer, K. Deshpande, M.R. Lessard, A.T. Weatherwax, G.S. Bust, G. Crowley, T.E. HumphreysJournal Paper2014
High-Precision Globally-Referenced Position and Attitude via a Fusion of Visual SLAM, Carrier-Phase-Based GPS, and Inertial MeasurementsD.P. Shepard and T.E. HumphreysConference Paper2014
Analysis and Synthesis of Collaborative Opportunistic Navigation SystemsZ.M. KassasPh.D. Dissertation2014
Demonstration of a Space Capable Miniature Dual Frequency GNSS ReceiverE.G. Lightsey, T.E. Humphreys, J.A. Bhatti, A.J. Joplin, B.W. O’Hanlon, and S.P. PowellJournal Paper2014
Secure Perception for Autonomous SystemsT. HumphreysPresentation2014
A Blueprint for Civil GPS Navigation Message AuthenticationA.J. Kerns, K.D. Wesson, and T.E. HumphreysConference Paper2014
A Phase-Reconstruction Technique for Low-Power Centimeter-Accurate Mobile PositioningK.M. Pesyna Jr., Z.M. Kassas, R.W. Heath Jr., T.E. HumphreysJournal Paper2014
Unmanned Aircraft Capture and Control via GPS SpoofingA.J. Kerns, D.P. Shepard, J.A. Bhatti, T.E. HumphreysJournal Paper2014
Autonomous Adaptive Low-Power Instrument Platform (AAL-PIP) for remote high latitude geospace data collectionC.R. Clauer, H. Kim, K. Deshpande, Z. Xu, D. Weimer, S. Musko, G. Crowley, C. Fish, R. Nealy, T.E. Humphreys, J.A. Bhatti, A.J. RidleyJournal Paper2014
Receding Horizon Trajectory Optimization in Opportunistic Navigation EnvironmentsZ.M. Kassas and T.E. HumphreysJournal Paper2015
Greedy Motion Planning for Simultaneous Signal Landscape Mapping and Receiver LocalizationZ.M. Kassas, A. Arapostathis, and T.E. HumphreysJournal Paper2015
Hostile Control of Ships via False GPS Signals: Demonstration and DetectionJ.A. Bhatti and T.E. HumphreysJournal Paper2017
Unhackable Drones: The Challenges of Securely Integrating Unmanned Aircraft into the National AirspaceK. Wesson and T. HumphreysMagazine Article2013
Real-Time GPS Spoofing Detection via Correlation of Encrypted SignalsB.W. O'Hanlon, M.L. Psiaki, J.A. Bhatti, D.P. Shepard, T.E. HumphreysJournal Paper2013
Secure PNT for Autonomous SystemsT. HumphreysPresentation2013
Precision Limits of Low-Energy GNSS ReceiversK.M. Pesyna, R.W. Heath, and T.E. HumphreysConference Paper2013
Cost Analysis of Square Root Information Filtering and Smooting with Mixed Real-Integer StateK. Pesyna Jr and T. HumphreysWhite Paper2013
Achieving the Cramer-Rao Lower Bound in GPS Time-of-Arrival Estimation: A Frequency Domain Weighted Least-Squares Estimator ApproachK. Pesyna, T. HumphreysWhite Paper2013
Receding Horizon Trajectory Optimization for Simultaneous Signal Landscape Mapping and Receiver LocalizationZ. Kassas, J. Bhatti, and T. HumphreysConference Paper2013
Observability Analysis of Collaborative Opportunistic Navigation with Pseudorange MeasurementsZ.M. Kassas and T.E. HumphreysJournal Paper2013
The Price of Anarchy in Active Signal Landscape Map BuildingZ. Kassas, T. HumphreysConference Paper2013
A Graphical Approach to GPS Software-Defined Receiver ImplementationZ. Kassas, J. Bhatti, T. HumphreysConference Paper2013
A Combined Symmetric Difference and Power Monitoring GNSS Anti-Spoofing TechniqueK. Wesson, B. L. Evans, and T. HumphreysConference Paper2013
A Probabilistic Framework for Global Navigation Satellite System Signal Timing AssuranceK.D. Wesson, B.L. Evans, and T.E. HumphreysConference Paper2013
GPS Spoofing & Implications for TelecomK. WessonPresentation2013
GPS Software-Defined Receiver and Radio Frequency Signal Landscape SimulatorZ. KassasPresentation2013
Highlight: Collaborative Opportunistic NavigationZ.M. KassasMagazine Article2013
Motion Planning for Optimal Information Gathering in Opportunistic Navigation SystemsZ. Kassas and T. HumphreysConference Paper2013
GPS Spoofing Detection via Dual-Receiver Correlation of Military SignalsPsiaki, M.L., B.W. O'Hanlon, J.A. Bhatti, D.P. Shepard, and T.E. HumphreysJournal Paper2013
Fusion of Carrier-Phase Differential GPS, Bundle-Adjustment-Based Visual SLAM, and Inertial Navigation for Precisely and Globally-Registered Augmented RealityD. ShepardMasters Thesis2013
GPS Vulnerabilities and Implications for TelecomT. HumphreysPresentation2013
Detection Strategy for Cryptographic GNSS Anti-SpoofingHumphreys, T.E.Journal Paper2013
GAIN: Collaborative Opportunistic NavigationZ. Kassas, T. HumphreysPoster2013
UAV Integration: Privacy and Security HurdlesT. HumphreysPresentation2013
Extreme GPS: Limits of Security & PrecisionT. HumphreysPresentation2013
Secure Navigation and TimingT. HumphreysPresentation2012
Future Directions in GNSS ResearchT. HumphreysPresentation2012
Initial GPS scintillation results from CASES receiver at South Pole, AntarcticaK.B. Deshpande, G. S. Bust, C. R. Clauer, H. Kim, J. E. Macon, T. E. Humphreys, J. A. Bhatti, S. B. Musko, G. Crowley, and A. T. WeatherwaxJournal Paper2012
Evaluation of the Vulnerability of Phasor Measurement Units to GPS Spoofing AttacksD.P. Shepard, T.E. Humphreys, A.A. FanslerJournal Paper2012
Position Paper: Secure Time Transfer for CPSK.D. Wesson, T.E. Humphreys, and B.L. EvansWhite Paper2012
Probabilistic Secure Time Transfer: Challenges and Opportunities in a Sub-Millisecond WorldK. Wesson, T. Humphreys, B. EvansPresentation2012
Statement on Privacy Issues Related to the Domestic Use of Unmanned Aerial VehiclesT. HumphreysTestimony2012
The Texas Spoofing Test Battery: Toward a Standard for Evaluating GPS Signal Authentication TechniquesT.E. Humphreys, J.A. Bhatti, D.P. Shepard, and K.D. WessonConference Paper2012
Observability and Estimability of Collaborative Opportunistic Navigation with Pseudorange MeasurementsZ.M. Kassas and T.E. HumphreysConference Paper2012
Evaluation of Smart Grid and Civilian UAV Vulnerability to GPS Spoofing AttacksD.P. Shepard, J.A. Bhatti, T.E. Humphreys, A.A. FanslerConference Paper2012
Precise Augmented Reality Enabled by Carrier-Phase Differential GPSD.P. Shepard, K.M. Pesyna, and T.E. HumphreysConference Paper2012
Practical Cryptographic Civil GPS Signal AuthenticationWesson, K., M. Rothlisberger, and T. E. HumphreysJournal Paper2012
Going Up Against Time: The Power Grid’s Vulnerability to GPS Spoofing AttacksD.P. Shepard, T.E. Humphreys, and A.FanslerTrade Magazine Article2012
Drone Hack: Spoofing Attack Demonstration on a Civilian Unmanned Aerial VehicleD.P. Shepard, J.A. Bhatti, and T.E. HumphreysTrade Magazine Article2012
Secure Civil Navigation and TimingT. HumphreysPresentation2012
Statement on the Vulnerability of Civil Unmanned Aerial Vehicles and Other Systems to Civil GPS SpoofingT. HumphreysTestimony2012
Observability Analysis of Opportunistic Navigation with Pseudorange MeasurementsZ.M. Kassas and T.E. HumphreysConference Paper2012
Constructing a Continuous Phase Time History from TDMA Signals for Opportunistic NavigationK.M. Pesyna Jr.,  Z.M. Kassas, T.E. HumphreysConference Paper2012
Development and Demonstration of a TDOA-Based GNSS Interference Signal Localization SystemJ.A. Bhatti, T.E. Humphreys, and B.M. LedvinaConference Paper2012
Collaborative Opportunistic NavigationZ. Kassas, K. Pesyna, T. HumphreysPoster2012
The GPS Dot and Its Discontents: Privacy vs. GNSS IntegrityT.E. HumphreysTrade Magazine Article2012
Evaluation of the Vulnerability of Phasor Measurement Units to GPS Spoofing AttacksD.P. Shepard, T.E. Humphreys, and A.A. FanslerConference Paper2012
Development and Testing of a Minaturized, Dual-Frequency GPS Receiver for Space ApplicationsJoplin, A.J., E.G. Lightsey, T.E. HumphreysConference Paper2012
Straight Talk on Anti-Spoofing: Securing the Future of PNTWesson, K., D. Shepard, and T. HumphreysTrade Magazine Article2012
Know Your Enemy: Signal Characteristics of Civil GPS JammersMitch, R.H., R.C. Dougherty, M.L. Psiaki, S.P. Powell, B.W. O’Hanlon, J.A. Bhatti, and T.E. HumphreysTrade Magazine Article2012
Development and Testing of a Miniaturized, Dual-Frequency, Software-Defined GPS Receiver for Space ApplicationsJoplin, A.J.Masters Thesis2011
A Collection of Observations and Advice on University TeachingT.E. HumphreysWhite Paper2011
Radionavigation Robustness and SecurityT. HumphreysPresentation2011
CubeSat-Sized GNSS Radio Occultation ExperimentsT. HumphreysPresentation2011
GPS-assisted Femtocell Synchronization and Localization Through Tightly-Coupled Opportunistic NavigationK. Pesyna, K. Wesson, R. Heath, T. HumphreysPoster2011
Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor PositioningPesyna, Jr., K.M., Z.M. Kassas, J.A. Bhatti, and T.E. HumphreysConference Paper2011
Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor PositioningZ. Kassas, K. Pesyna, J. Bhatti, T. HumphreysPoster2011
Characterization of Receiver Response to Spoofing AttacksShepard, D.P. and T.E. HumphreysConference Paper2011
An Evaluation of the Vestigial Signal Defense for Civil GPS Anti-SpoofingWesson, K.D., D.P. Shepard, J.A. Bhatti, and T.E. HumphreysConference Paper2011
A Proposed Navigation Message Authentication Implementation for Civil GPS Anti-SpoofingWesson, K.D., M.P. Rothlisberger, and T.E. HumphreysConference Paper2011
Civilian GPS Spoofing Detection based on Dual-Receiver Correlation of Military SignalsPsiaki, M.L., B.W. O'Hanlon, J.A. Bhatti, D.P. Shepard, T.E. HumphreysConference Paper2011
Signal Characteristics of Civil GPS JammersMitch, R.H., R.C. Dougherty, M.L. Psiaki, S.P. Powell, B.W. O'Hanlon, J.A. Bhatti, and T.E. HumphreysConference Paper2011
CASES: A Smart, Compact GPS Software Receiver for Space Weather MonitoringO'Hanlon, B.W., M.L. Psiaki, S. Powell, J.A. Bhatti, T.E. Humphreys, G. Crowley, G.S. BustConference Paper2011
CASES: A Novel Low-Cost Ground-based Dual-Frequency GPS Software Receiver and Space Weather MonitorCrowley, G., G.S. Bust, A.Reynolds, I.Azeem, R.Wilder, B.W. O’Hanlon, M.L. Psiaki, S.Powell, T.E. Humphreys, and J.A. BhattiConference Paper2011
Extending the Reach of GPS-assisted Femtocell Synchronization and Localization Through Tightly-Coupled Opportunistic NavigationPesyna, Jr., K. M., K. D. Wesson, R. W. Heath, Jr., T. E. HumphreysConference Paper2011
GPS Spoofing and the Financial SectorHumphreys, T.E.White Paper2011
Characterization of Receiver Response to Spoofing AttacksD. ShepardUndergraduate Honors Thesis2011
State of the Art and Future Trends in RadionavigationT. HumphreysPresentation2011
Indoor GPS: Tightly Coupled Opportunistic NavigationK. Pesyna, K. Wesson, J. Bhatti, T. HumphreysPoster2010
GPS Spoofing Detection SystemM. Psiaki, B. O'Hanlon, T. Humphreys, J. BhattiPoster2010
Spoofing the Timing Signal: What Else is Vulnerable?T. HumphreysPresentation2010
The GPS Assimilator: a Method for Upgrading Existing GPS User Equipment to Improve Accuracy, Robustness, and Resistance to SpoofingHumphreys, T.E., J.A. Bhatti, B.M. LedvinaConference Paper2010
Opportunistic Frequency Stability Transfer for Extending the Coherence Time of GNSS Receiver ClocksWesson, K.D., K.M. Pesyna, Jr., J.A. Bhatti, T.E. HumphreysConference Paper2010
Advances in GNSS EquipmentT. HumphreysPresentation2010
GNSS Assimilator: A method for upgrading existing GNSS user equipment to improve accuracy, robustness, and resistance to spoofingHumphreys, T.E., B.M. LedvinaTrade Magazine Article2010
Frontiers in RadionavigationT. HumphreysPresentation2010
Radionavigation IntegrityT. HumphreysPresentation2010
Riding out the rough spots: Scintillation-robust GNSS carrier trackingT. HumphreysPresentation2010
A data-driven testbed for evaluating GPS carrier tracking loops in ionospheric scintillationHumphreys, T.E., M.L. Psiaki, B.M. Ledvina, A.P. Cerruti, and P.M. Kintner, Jr.Journal Paper2010
Modeling the effects of ionospheric scintillation on GPS carrier phase trackingHumphreys, T.E., M.L. Psiaki, and P.M. Kintner, Jr.Journal Paper2010
Development and Field Testing of a DSP-Based Dual-Frequency Software GPS ReceiverO’Hanlon, B.W., M.L. Psiaki, P.M. Kintner, Jr., T.E. HumphreysConference Paper2009
Receiver-Autonomous Spoofing Detection: Experimental Results of a Multi-antenna Receiver Defense Against a Portable Civil GPS SpooferMontgomery, P.Y., T.E. Humphreys, and B.M. LedvinaConference Paper2009
Assessing the Civil GPS Spoofing ThreatT. Humphreys, J. Bhatti, B. Ledvina, M. Psiaki, B. O'Hanlon, P. Kintner, P. MontgomeryPresentation2009
Exploiting Multicore Technology in Software-Defined GNSS ReceiversHumphreys, T.E., J.A. Bhatti, T. Pany, B.M. Ledvina, B.W. O’HanlonJournal Paper
Simulating Ionosphere-Induced Scintillation for Testing GPS Receiver Phase Tracking LoopsHumphreys, T.E., M.L. Psiaki, J.C. Hinks, B.W. O’Hanlon and P.M. Kintner, Jr.Journal Paper2009
A Multi-Antenna Defense: Receiver-Autonomous GPS Spoofing DetectionMontgomery, P.Y., T.E. Humphreys, B.M. LedvinaTrade Magazine Article2009
GNSS and Ionospheric Scintillation: How to Survive the Next Solar MaximumKintner, Jr., P.M., T.E. Humphreys, J. HinksTrade Magazine Article2009
Evaluating GPS Receiver Robustness to Ionospheric ScintillationHinks, J.C., T.E. Humphreys, B.W. O'Hanlon, M.L. Psiaki, P.M. Kintner, Jr.Conference Paper2008
Assessing the Spoofing Threat: Development of a Portable GPS Civilian SpooferHumphreys, T.E., B.M. Ledvina, M.L. Psiaki, B.W. O'Hanlon, P.M Kintner, Jr.Conference Paper2008
Considerations for Future IGS ReceiversHumphreys, T.E., L. Young, T. PanyConference Paper2008
A Technique for Determining the Carrier Phase Differences between Independent GPS Receivers during ScintillationMohuiddin, S., T.E. Humphreys, M.L. PsiakiConference Paper2007
Searching for GalileoPsiaki, M.L., T.E. Humphreys, S. Mohiuddin, S.P. Powell, A.P. Cerruti, and P.M. Kintner, Jr.Conference Paper2006
GNSS Receiver Implementation on a DSP: Status, Challenges, and ProspectsHumphreys, T.E., M.L. Psiaki, P.M. Kintner, Jr., B.M. LedvinaConference Paper2006
The Semidiurnal Variation in GPS-derived Zenith Neutral DelayHumphreys, T.E., Kelly, M.C., Huber, N., Kintner, Jr., P.M.Journal Paper2005
GPS Carrier Tracking Loop Performance in the presence of Ionospheric ScintillationsHumphreys, T.E., M.L. Psiaki, P.M. Kintner, Jr., B.M. LedvinaConference Paper2005
Magnetometer-based Attitude and Rate Estimation for a Spacecraft with Wire BoomsT.E. Humphreys, M.L. Psiaki, E.M. Klatt, S.P. Powell, P.M. Kintner, Jr.Journal Paper2005