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Frank Van Graas

Russ Professor
Electrical Engineering and Computer Science, Avionics Engineering Center
STKR 345
vangraas@ohio.edu
Phone: 740.593.1586

http://www.ohio.edu/people/vangraas

Frank joined the electrical engineering faculty in 1988. He is an Ohio University presidential research scholar and a past president of the Institute of Navigation (1998/1999). He served as the Institute of Navigation (ION) executive branch fellow at NASA headquarters in the Space Communications and Navigation office in 2009. He was a visiting professor at Delft University of Technology (1995, 1996) and Leeds University (1994-2003). He is the director of the Consortium of Ohio Universities on Navigation and Timekeeping (COUNT), treasurer of ION (2011-2013); executive committee member of the ION/IEEE Position, Location and Navigation Symposium; and a key technical advisor to the Federal Aviation Administration’s Ground-Based Augmentation Systems program.


Research Interests: Electronic navigation systems, aircraft precision appproach and landing, integrated navigation systems, remote sensing and surveillance systems, electro-optical and infrared camera-based navigation, ionospheric signal propagation, integration with inertial navigation sensors, aviation safety, autonomous vehicles.

All Degrees Earned: Ph.D., Electrical Engineering, Ohio University, 1988. M.S., Electrical Engineering, Delft University of Technology, 1985.

Publications:

  • 1. van Graas, F., Craig, S., Pelgrum, W., “Laboratory and Flight-Test Analysis of Rubidium Frequency Reference Performance Under Dynamics,” Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 2950-.
  • Bruckner, D. C., Van Graas, F., Skidmore, T., Algorithm and Flight Test Results to Exchange Code Noise and Multipath for Biases in Dual Frequency Differential GPS for Precision Approach, NAVIGATION: Journal of The Institute of Navigation, Vol. 57, No. 3, 2010.
  • Van Graas, F., Soloviev, A., Uijt de Haag, M., Gunawardena, S., Closed-Loop Sequential Signal Processing and Open-Loop Batch Processing Approaches for GNSS Receiver Design, IEEE Journal of Selected Topics in Signal Processing, Special Issue on: Advanced Signal Processing for GNSS and Robust Navigation, Vol. 3, Issue 4, August 2009.
  • Van Graas, F., Soloviev, A. Precise Velocity Estimation Using a Stand-Alone GPS Receiver, NAVIGATION: Journal of The Institute of Navigation, Vol. 51, No. 4, 2004.
  • Van Graas, F., Diggle, D. W., Hueschen, R. M., Interferometric GPS Flight Reference/Autoland System: Flight Test Results, NAVIGATION: Journal of The Institute of Navigation, Vol. 41, No.1, Spring 1994.

Patents:

  • Systems and Methods for Acquisition and Tracking of Low CNR GPS Signals, F. van Graas, A. Soloviev, S. Gunawardena, UK Patent No.: GB2435755, Filing date: 5 October 2005, Date of Patent: 28 April 2009; US Filing date: 22 September 2005. US Patent No.: 8013789, Filing date: 22 September 2005, Date of Patent: 6 September 2011.
  • Precision Approach Guidance System and Associated Method, J. Campbell, F. van Graas, M. Uijt de Haag, US Patent No.: 7920943, Filing date: 24 January 2006, Date of Patent: 5 April 2011.

Awards:

  • Johannes Kepler Award for ""sustained and significant contributions to satellite navigation,"" from the Satellite Division of The Institute of Navigation, 20 September 1996.
  • Fellow, The Institute of Navigation, June 2001.
  • Colonel Thomas L. Thurlow Award for ""outstanding contribution to the science of navigation,"" from The Institute of Navigation, June 2002. 2010 Dr. Samual Burka Award from the Institute of Navigation to recognize outstanding achievement in the preparation of papers contributing to the advancement of navigation and space guidance for the journal paper “Algorithm and Flight Test Results to Exchange Code Noise and Multipath for Biases in Dual Frequency Differential GPS for Precision Approach” published in the Fall 2010 issue of NAVIGATION, Journal of The Institute of Navigation, Vol. 57, No. 3, pp 213.
  • 2010 John Ruth Avionics Award from American Institute of Aeronautics and Astronautics (AIAA) “For Outstanding Lifetime Achievement in the Area of GPS Navigation, presented on October 19, 2011.

Journal Article, Academic Journal (41)

  • Van Graas, F., Craig, S., Pelgrum, W., Ugazio, S. Laboratory and Flight Test Analysis of Rubidium Frequency Reference Performance. 2. NAVIGATION; 60: 123-131.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Mitigation of GPS Cross-Correlation Errors Using Semi-Codeless Tracking. 1. IEEE Transactions on Aerospace and Electronic Systems; 48.
  • Van Graas, F., Cohenour, C. GPS Orbit and Clock Error Distributions. 1. NAVIGATION; 58: 17-28.
  • Bruckner, D., Van Graas, F., Skidmore, T. Algorithm and Flight Test Results to Exchange Code Noise and Multipath for Biases in Dual Frequency Differential GPS for Precision Approach. 3. Journal of The Institute of Navigation; 57.
  • Bruckner, D., Van Graas, F., Skidmore, T. Approximations to Composite GPS Protection Levels for Aircraft Precision Approach and Landing. GPS Solutions.
  • Soloviev, A., Van Graas, F., , . Beam Steering in Global Positioning System Receivers using Synthetic Phased Arrays. 3. IEEE Transactions of Aerospace and Electronic Systems; 46.
  • Bruckner, D., Van Graas, F., Skidmore, T. Statistical Characterization of Composite Protection Levels for GPS. GPS Solutions.
  • Soloviev, A., Van Graas, F. Beam Steering in Global Positioning System Receivers using Synthetic Phased Arrays. 3. IEEE Transaction on Aerospace and Electronic Systems; 46: 1513-1522.
  • Stepaniak, M., Uijt de Haag, M., Van Graas, F. Field Programmable Gate Array-Based Attitude Stabilization. 7. AIAA Journal of Aerospace Computing, Information and Communication; 6.
  • Huang, J., Van Graas, F. A Carrier Phase Batch Processor for Differential Global Positioning System: Simulation and Real-Data Results. Measurement Science and Technology.
  • Van Graas, F., Soloviev, A., Uijt de Haag, M., Gunawardena, S. Closed-Loop Sequential Signal Processing and Open-Loop Batch Processing Approaches for GNSS Receiver Design. 4. IEEE Journal of Selected Topics in Signal Processing; 3.
  • Gunawardena, S., Zhu, Z., Uijt de Haag, M., Van Graas, F. Remote-Controlled Continuously Operating GPS Anomalous Event Monitor. 2. NAVIGATION: Journal of The Institute of Navigation; 56.
  • Cohenour, C., Van Graas, F. Temporal Decorrelation Distributions of GPS Range Measurements due to Satellite Orbit and Clock Errors. Navigation the Journal of the Institute of Navigation.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Decoding Navigation Data Messages from Weak GPS Signals. 2. IEEE Transactions on Aerospace and Electronic Systems; 45.
  • Zhu, Z., Van Graas, F. Earth-Surface Multipath Detection and Error Modeling for Aircraft GPS Receivers. 1. NAVIGATION: Journal of The Institute of Navigation; 56.
  • Cohenour, C., Van Graas, F. GPS Orbit and Clock Error Distributions. Navigation the Journal of the Institute of Navigation.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Deeply Integrated GPS/Low-Cost IMU for Low CNR Signal Processing: Concept Description and In-Flight Demonstration. 1. NAVIGATION: Journal of The Institute of Navigation; 55.
  • Gunawardena, S., Zhu, Z., Uijt de Haag, M., Van Graas, F. Remote-Controlled, Continuously Operating GPS Anomalous Event Monitor. NAVIGATION, Journal of the Institute of Navigation.
  • Soloviev, A., Van Graas, F. Batch-Processing of Inertial Measurements for Mitigation of Sculling and Commutation Errors. 4. NAVIGATION: Journal of The Institute of Navigation; 54.
  • Huang, J., Van Graas, F., Cohenour, C. Characterization of Tropospheric Spatial Decorrelation Errors Over a 5-km Baseline. 4. NAVIGATION: Journal of The Institute of Navigation; 54.
  • Huang, J., Van Graas, F. Comparison of Tropospheric Decorrelation Errors in the Presence of Severe Weather Conditions in Different Areas and Over Different Baselines. 3. Journal of The Institute of Navigation; 54.
  • Soloviev, A., Van Graas, F. Enhancement of Integrated GPS/INS Performance Utilizing Frequency Domain Implementation of INS Calibration. 2. Journal of The Institute of Navigation; 54.
  • Campbell, J., Uijt de Haag, M., Van Graas, F. Terrain-Referenced Precision Approach Guidance: Proof-of-Concept Flight Test Results. 1. Journal of The Institute of Navigation; 54.
  • Gunawardena, S., Soloviev, A., Van Graas, F. Wideband Transform-Domain GPS Instrumentation Receiver for Signal Quality and Anomalous Event Monitoring. 4. NAVIGATION: Journal of the Institute of Navigation; 54.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Decoding Navigation Data Messages from Weak GPS Signals. IEEE Transactions on Aerospace and Electronic Systems.
  • Gunawardena, S., Van Graas, F. Split-Sum Correlator Simplifies Range Computations in GPS Receiver. 25. IEE Electronics Letters; 42: 1469-1471.
  • Campbell, J., Uijt de Haag, M., Van Graas, F. Terrain-Referenced Navigation Using Airborne Laser Scanner. 4. Journal of The Institute of Navigation; 52.
  • Van Graas, F., Soloviev, A. Precise Velocity Estimation Using a Stand-Alone GPS Receiver. 4. Journal of The Institute of Navigation; 51.
  • Marti, L., Van Graas, F. The Effects of Aircraft Overflights on GPS Measurements. 2. Journal of The Institute of Navigation; 51.
  • Aloi, D., Van Graas, F. Ground Multipath Mitigation via Polarization Steering of GPS Signal. 2. IEEE Transactions on Aerospace and Electronic Systems; 40.
  • Thornberg, D., Thornberg, D., DiBenedetto, M., Braasch, M., Van Graas, F., Bartone, C. The LAAS Integrated Multipath Limiting Antenna (IMLA). 2. Journal of the Institute of Navigation; 50.
  • Gray, R., Van Graas, F. Inflight Detection of Errors for Enhanced Aircraft Flight Safety using DTED with GPS and Radar Altimeter. 4. Journal of The Institute of Navigation; 47.
  • Bartone, C., Van Graas, F. Airport Pseudolite for Local Area Augmentation. 1. Institute of Electrical and Electronics Engineers, Transactions on Aerospace and Electronics Systems; 36: 278-286.
  • Van Graas, F., Diggle, D., Uijt de Haag, M., Skidmore, T., DiBenedetto, M., Wullschleger, V., Velez, R. Ohio University/FAA Flight Test Demonstration Results of the Local Area Augmentation System (LAAS). Journal of The Institute of Navigation.
  • Van Graas, F., Diggle, D., Uijt de Haag, M., Skidmore, T., DiBenedetto, M. Ohio University/FAA Flight Test Demonstration of Local Area Augmentation System (LAAS). 2. Journal of the Institute of Navigation; 45.
  • Van Graas, F., Lee, S. High-Accuracy Differential Positioning for Satellite-Based Systems Without Using Code-Phase Measurements. 4. Journal of The Institute of Navigation; 42.
  • Van Graas, F., Diggle, D., Hueschen, R. Interferometric GPS Flight Reference/Autoland System: Flight Test Results. 1. Journal of The Institute of Navigation; 41.
  • Farrell, J., Van Graas, F. Statistical Validation for GPS Integrity Test. 2. Journal of The Institute of Navigation; 39.
  • Van Graas, F., Braasch, M. GPS Interferometric Attitude and Heading Determination: Initial Flight Test Results. 4. Navigation: Journal of The Institute of Navigation; 38.
  • Enge, P., Vicksell, F., Goddard, R., Van Graas, F. Combining Pseudoranges from GPS and LORAN-C for Air Navigation. 1. Journal of The Institute of Navigation; 37.
  • Van Graas, F. Sole Means Navigation Through Hybrid LORAN-C and GPS. 2. Journal of The Institute of Navigation; 35.

Book, Chapter in Scholarly Book (2)

  • Campbell, J., Uijt de Haag, M., Van Graas, F. Terrain-Referenced Precision Approach Guidance Proof-of-Concept Flight Test Results. Institute of Navigation; 7.
  • Enge, P., Van Graas, F. GPS/Loran. Washington, D.C.: Book Chapter in: The Global Positioning System - Theory and Application, American Institute of Aeronautics and Astronautics.

Technical Report (2)

  • Bruckner, D., Skidmore, T., Van Graas, F. Difficulties in Estimating Phase and Code Reference Points in Controlled Reception Pattern Antenna (CRPA) Systems. Athens, OH: Technical Memorandum OU/AEC 06-31TM-JPALS, Avionics Engineering Center, Ohio University.
  • Skidmore, T., Cohenour, C., DiBenedetto, M., Van Graas, F. Land Based JPALS Follow-On Technology Development Tactical System Performance Analysis. Athens, OH: Technical Memorandum OU/AEC 06-04TM04/283OU/AEC 05, Avionics Engineering Center.

Journal Article, Professional Journal (4)

  • Stepaniak, M., Van Graas, F., Uijt de Haag, M. Design of an Electric Propulsion System for a Quadrotor Unmanned Aerial Vehicle. 3. AIAA Journal of Aircraft; 46.
  • Zhu, Z., Van Graas, F., Starzyk, J. GPS Signal Acquisition Using the Repeatability of Successive Code Phase Measurements. 1. GPS Solutions, Springer Berlin/Heidelberg; 12.
  • Zhu, Z., Van Graas, F., Starzyk, J. GPS signal acquisition using the repeatability of successive code phase measurements. GPS Solutions, Springer.
  • Pang, J., Van Graas, F., Starzyk, J. Fast Direct GPS P-Code Acquisition. 3. GPS Solutions, Springer-Verlag Heidelberg; 7.

Conference Proceeding (137)

  • Gunawardena, S., Van Graas, F. Analysis of GPS-SPS Inter-PRN Pseudorange Biases due to Receiver Front-End Components.
  • Zhu, Z., Van Graas, F. Implications of C/A Code Cross Correlation on GPS and GBAS. IEEE/ION Position location and Navigation Symposium.
  • Gunawardena, S., Van Graas, F. An Empirical Model for Computing GPS SPS Pseudorange Natural Biases Based on High Fidelity Measurements from a Software Receiver. The Institute of Navigation; 1341-1358.
  • Craig, S., Naab-Levy, A., Li, K., Duan, P., Pelgrum, W., Van Graas, F., Uijt de Haag, M., , . Autonomous Snowplow Design. The Institute of Navigation; 2044-2057.
  • Cohenour, C., Van Graas, F. GPS Orbit and Clock Error Distributions, 2005-2012. Institute of Navigation; 946-958.
  • Craig, S., Van Graas, F. In-Flight Measurements and Correction Model for Rubidium Oscillator Specific Force and Magnetic Field Susceptibility. Institute of Navigation; 567-576.
  • Vinande, E., Pujara, N., Morton, Y., Marcus, R., Van Graas, F., Pelgrum, W. International Collaborative Navigation Research. Institute of Navigation; 1104-1109.
  • Van Graas, F., Kollar, R. Processing of GPS Station Data for Prediction Algorithm Analysis of the 2011 Tohoku Earthquake. Institute of Navigation; 62-68.
  • Ugazio, S., Van Graas, F., Pelgrum, W. Total Electron Content Measurements with Uncertainty Estimates. Proceedings of Navitec 2012, European Space Agency.
  • Byrne, E., Nguyen, T., Boehnke, L., Van Graas, F., Stein, S. Clock Steering using Frequency Estimates from Stand-alone GPS Receiver Carrier Phase Observations. The Institute of Navigation; 211-220.
  • Gunawardena, S., Van Graas, F. Analysis of GPS Pseudorange Natural Biases Using a Software Receiver, Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012). Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012).
  • Pelgrum, W., Li, K., Smearcheck, M., Van Graas, F. eDME Architecture Development and Flight-Test Evaluation. Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012).
  • Gunawardena, S., Van Graas, F. High Fidelity Chip Shape Analysis of GNSS Signals Using a Wideband Software Receiver. Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012).
  • Craig, S., Kollar, R., Lee, K., Duang, P., Pelgrum, W., Van Graas, F., Uijt de Haag, M. Laser-Guided Autonomous Snowplow Design. Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012).
  • Wang, J., Morton, Y., Zhou, Q., Van Graas, F., Pelgrum, W. Time-Frequency Analysis of Ionosphere Scintillations Observed by a GNSS Receiver Array. Proceedings of IEEE/ION Position, Location and Navigation Symposium.
  • Peng, S., Morton, Y., Pelgrum, W., Van Graas, F. High Latitude Ionosphere Scintillations at GPS L5 Band. Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011).
  • Van Graas, F., Graig, S., Pelgrum, W. Laboratory and Flight-Test Analysis of Rubidium Frequency Reference Performance Under Dynamics. Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011).
  • Craig, S., Miltner, M., Fulk, D., Pelgrum, W., Van Graas, F. Monocular Autonomously-Controlled Snowplow. Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011).
  • Gunawardena, S., Van Graas, F. Multi-Channel Wideband GPS Anomalous Event Monitor. Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011).
  • Pelgrum, W., Morton, Y., Van Graas, F., Vikram, P., Peng, S. Multi-Domain Analysis of the Impact of Natural and Man-Made Ionosphere Scintillations on GNSS signals Propagations. Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011).
  • Van Graas, F., Zhu, Z. C/A Code Cross Correlation Error with Carrier Smoothing - the Choice of Time Constant: 30 s vs. 100 s. Proceedings of the 2011 International Technical Meeting of The Institute of Navigation.
  • Bruckner, D., Van Graas, F., Skidmore, T. Flight Test Results and Multipath Mitigation for Ionosphere-Free, Dual-Frequency Code Noise and Multipath (CNMP) Algorithm on King Air and DC-3 Airframes. Proceedings of the 2011 International Technical Meeting of The Institute of Navigation.
  • Pelgrum, W., Morton, Y., Van Graas, F., Gunawardena, S., Bakich, M., Cherney, D., Peng, S., Triplett, J., Vemuru, A., Vikram, P. Measurement and Analysis of Artificially-Generated and Natural Ionosphere Scintillations Effects on GNSS Signals. Proceedings of the 2011 International Technical Meeting of The Institute of Navigation.
  • Van Graas, F., Zhu, Z. Tropospheric Delay Threats for the Ground Based Augmentation System. Proceedings of the 2011 International Technical Meeting of The Institute of Navigation.
  • Farrell, J., Van Graas, F. Containment Limits for Free-Inertial Coast. Proceedings of the 23rd International Technical Meeting of The Satellite Division of the Institute of Navigation.
  • Zhang, L., Morton, Y., Van Graas, F., Beach, T. Characterization of GNSS Signal Parameters Under Ionosphere Scintillation Conditions using Software-based Tracking Algorithms. Proceedings of IEEE/ION PLANS 2010.
  • Bruckner, D., Van Graas, F., Skidmore, T. Carrier-phase Position Domain Smoothing (CDPS) Algorithm and Flight Test Results for New Dual-Frequency Differential Architecture. Proceedings of the 2010 International Technical Meeting of The Institute of Navigation.
  • Morton, Y., Moore, R., Van Graas, F. GPS Signal Propagation Mode Impact on Receiver Position Errors. Proceedings of the 2010 International Technical Meeting of The Institute of Navigation.
  • Matteo, N., Morton, Y., Chandrasekaran, P., Van Graas, F. Higher Order Ionosphere Errors at Arecibo, Millstone, and Jicamarca. Proceedings of the 22nd International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2009).
  • Soloviev, A., Van Graas, F., Gunawardena, S., Miller, M. Synthetic Aperture GPS Signal Processing: Concept and Feasibility Demonstration. Anaheim, CA: Proceedings of the International Technical Meeting of the ION.
  • Gunawardena, G., Zhu, Z., Van Graas, F. Triple Frequency RF Front-End for GNSS Instrumentation Receiver Applications. Savannah, GA: Proceedings of Institute of Navigation GNSS 2008.
  • Morton, Y., Zhou, Q., Van Graas, F. Assessment of Second Order Ionospheric Error in GPS Range Measurements Using Arecibo Incoherent Scatter Radar Measurements. Alexandria, VA: Proceedings of the 12th International Ionospheric Effects Symposium.
  • Soloviev, A., Van Graas, F. Utilizing Multipath Reflections in Deeply Integrated GPS/INS Architecture for Navigation in Urban Environments. Proceedings of IEEE/ION Position Location and Navigation Symposium.
  • DeVilbiss, S., Van Graas, F. AngelFire. Las Vegas, NV: Joint Navigation Conference.
  • Bruckner, D., Soloviev, A., Van Graas, F. Characterization of GPS Signals in Urban Environments. Ankara, Turkey: Proceedings of SET-104 North Atlantic Treaty Organization (NATO) Symposium on Military Capabilities Enabled by Advanced in Navigation Sensors.
  • Soloviev, A., Bruckner, D., Van Graas, F. Characterization of GPS Signals in Urban Environments Using Deeply Integrated GPS/IMU. Antalya, Turkey: Proceedings of the NATO Sensors and Electronics Technology Panel Symposium on Advanced Navigation Sensors and Systems for Urban, Indoor and Subterranean Environments ; (SET-104/RSY021/MSE).
  • Soloviev, A., Bates, D., Van Graas, F. Tight Coupling of Laser Scanner and Inertial Measurements for a Fully Autonomous Relative Navigation Solution. Ankara, Turkey: SET-104 North Atlantic Treaty Organization (NATO) Symposium on Military Capabilities Enabled by Advanced in Navigation Sensors.
  • Bates, D., Van Graas, F., Vadlamani, A. Continued Design and Development of the Ohio University Robotic Lawnmower. Ft. Worth, TX: Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigatio.
  • Parikh, N., Soloviev, A., Van Graas, F. Implementation of the Least Mean Square Approach for a Low-Cost Short Baseline Attitude Determination. Ft. Worth, TX: Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation.
  • Brenneman, M., Morton, J., Yang, C., Van Graas, F. Mitigation of GPS Multipath Using Polarization and Spatial Diversities. Ft. Worth, TX: Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation.
  • Zhu, Z., Gunawardena, S., Uijt de Haag, M., Van Graas, F. Advanced GPS Performance Monitor. Fort-Worth, TX: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Huang, J., Van Graas, F. A DGNSS Single Frequency Carrier Phase Batch Processor with High Integrity. Cambridge, MA: Proceedings of the 63rd Annual Meeting of The Institute of Navigation.
  • Huang, J., Cohenour, C., Van Graas, F. Characterization of Tropospheric Spatial Decorrelation Errors Over a 5-km Short Baseline. Cambridge, Massachusetts: Proceedings of the 63rd Annual Meeting of the Institute of Navigation; 397-412.
  • Bates, D., Van Graas, F. Covariance Analysis Considering the Propagation of Laser Scanning Errors for Use in LADAR Navigation. Cambridge, MA: Proceedings of the 63rd Annual Meeting of The Institute of Navigation.
  • Soloviev, A., Van Graas, F. Decorrelation Errors on Inertial Coasting Performance. Cambridge, MA: Proceedings of the 63rd Annual Meeting of The Institute of Navigation.
  • Zhu, Z., Gunawardena, S., Uijt de Haag, M., Van Graas, F. Satellite Anomaly and Interference Detection Using the GPS Anomalous Event Monitor. Cambridge, MA: Proceedings of the 63rd Annual Meeting of the Institute of Navigation.
  • Soloviev, A., Bruckner, D., Van Graas, F. Assessment of GPS Signal Quality in Urban Environments Using Deeply Integrated GPS/IMU. San Diego, CA: Proceedings of the Institute of Navigation National Technical Meeting.
  • Soloviev, A., Bates, D., Van Graas, F. Tight Coupling of Laser Scanner and Inertial Measurements for a Fully Autonomous Relative Navigation Solution. San Diego, CA: Proceedings of the Institute of Navigation National Technical Meeting.
  • Skidmore, T., Cohenour, C., Van Graas, F., DiBenedetto, M., Peterson, B. JPALS Tactical System Performance Evaluation Using a Controlled Reception Pattern Antenna. Fort Worth, Texas: Proceedings of the 19th International Technical Meeting of the Satellite Division of the Institute of Navigation ION GNSS 2006; 738-753.
  • Van Graas, F., Huang, J. Comparison of Tropospheric Decorrelation Errors in the Presence of Severe Weather Conditions in Different Areas and Over Different Baseline Lengths. Fort Worth, TX: Proceedings of the Institute of Navigation GNSS-06 Meeting.
  • Bates, D., Van Graas, F. GPS-Guided Autonomous Lawnmower with Scanning Laser Obstacle Detection. Fort Worth, TX: Proceedings of the Institute of Navigation GNSS-06 Meeting.
  • Gunawardena, S., Uijt de Haag, M., Van Graas, F., Zhu, Z. Remote-Controlled, Continuously Operating GPS Anomalous Event Monitor. Fort-Worth, TX: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Cutright, C., Sayre, J., Van Graas, F. Analysis of the Effects of Atmospheric Noise on Loran-C. Santa Barbara, CA: International Loran Association 34th Annual Convention and Technical Symposium.
  • Zhu, Z., Van Graas, F. Operational Considerations for C/A Code Tracking Errors Due to Cross Correlation. Long Beach, CA: Proceedings of the Institute of Navigation GNSS-05 Meeting.
  • Van Graas, F., Soloviev, A., Uijt de Haag, M., Gunawardena, S., Braasch, M. Comparison of Two Approaches for GNSS Receiver Algorithms: Batch Processing and Sequential Processing Considerations. Long Beach, CA: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Development of High Performance High Update Rate Reference GPS Receiver. Long Beach, CA: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Gunawardena, S., Soloviev, A., Van Graas, F. Wideband Dual-Frequency Transform-Domain GPS Instrumentation Receiver for Signal Quality and Anomalous Event Monitoring. Cambridge, MA: Proceedings of the 61st Annual Meeting of the Institute of Navigation.
  • Bartone, C., Van Graas, F., Arthur, T. A High Accuracy Relative DGPS Antenna Baseline Measurement System for Sensor Stabilization. San Diego, CA: Institute of Navigation – National Technical Meeting; 980-992.
  • Zhu, Z., Van Graas, F. Effects of Cross Correlation on High Performance C/A Code Tracking. San Diego, CA: Proceedings of the Institute of Navigation Technical Meeting.
  • Campbell, J., Uijt de Haag, M., Van Graas, F. Terrain Referenced Precision Approach Guidance. San Diego, CA: Proceedings of the Institute of Navigation Technical Meeting.
  • Skidmore, T., Van Graas, F. An Investigation of Tropospheric Errors on Differential GNSS Accuracy and Integrity. Long Beach, CA: Proceedings of the International Meeting of the Satellite Division of The Institute of Navigation, GPS/GNSS 2004.
  • Campbell, J., Uijt de Haag, M., Van Graas, F., Arthur, T., Dickman, J. DC-3 Flying Laboratory – Navigation Sensor and Remove Sensing Flight Test Results. Long Beach, CA: Proceedings of the International Meeting of the Satellite Division of The Institute of Navigation, GPS/GNSS 2004.
  • Marti, L., Van Graas, F. Terrain Referenced Navigation using Airborne Laser Scanner (ALASCA): Preliminary Flight Test Results. Long Beach, CA: Proceedings of the International Meeting of the Satellite Division of The Institute of Navigation, GPS/GNSS 2004.
  • Soloviev, A., Gunawardena, S., Van Graas, F. Deeply Integrated GPS/Low-Cost IMU for Low CNR Signal Processing: Flight Test Results and Real Time Implementation. Long Beach, CA: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Braasch, M., Van Graas, F. Avionics Education and Research at Ohio University. Dayton, OH: Proceedings of the Institute of Navigation Annual Meeting.
  • Van Graas, F., Krishnan, V., Suddapalli, R., Skidmore, T. Conspiring Biases in the Local Area Augmentation System. Dayton, OH: Proceedings of the Annual Meeting of The Institute of Navigation.
  • Gunawardena, S., Soloviev, A., Van Graas, F. Real Time Implementation of Deeply Integrated Software GPS Receiver and Low Cost IMU for Processing Low-CNR GPS Signals,. Dayton, OH: Proceedings of the 60th Annual Meeting of the Institute of Navigation.
  • Campbell, J., Uijt de Haag, M., Van Graas, F. Terrain Referenced Navigation using Airborne Laser Scanner (ALASCA): Preliminary Flight Test Results. Dayton, OH: Proceedings of the Annual Meeting of The Institute of Navigation.
  • Marti, L., Van Graas, F. Bias Detection and its Confidence Assessment in Global Positioning System Signals. Big Sky, Montana: Proceedings of 2004 IEEE Aerospace Conference.
  • Van Graas, F., Bartone, C., Arthur, T. GPS Antenna Phase and Group Delay Corrections. San Diego, CA: Proceedings of the National Technical Meeting of The Institute of Navigation; 399-408.
  • Soloviev, A., Van Graas, F., Gunawardena, S. Implementation of Deeply Integrated GPS/Low-Cost IMU for Reacquisition and Tracking of Low CNR GPS Signals. San Diego, CA: Proceedings of the Institute of Navigation National Technical Meeting.
  • Gunawardena, S., Van Graas, F., Soloviev, A. Real Time Block Processing Engine for Software GNSS Receivers. San Diego, CA: Proceedings of the Institute of Navigation National Technical Meeting.
  • Lad, M., Van Graas, F., Cutright, C., Diggle, D. Characterization of Atmospheric Noise in the Loran-C Band. Boulder, Colorado: Proceedings of ILA-32, International Loran Association.
  • Skidmore, T., Van Graas, F., Marti, L. Characterization of the DC-3 In-Flight GPS Antenna Performance. Portland, Oregon: Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation.
  • Campbell, J., Uijt de Haag, M., Van Graas, F., Young, S. Light Detection and Ranging-Based Terrain Navigation – A Concept Exploration. Portland, Oregon: Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation.
  • Liou, L., Tsui, J., Lin, D., Schamus, J., Van Graas, F., Morton, Y. Passive Altimeter Study Using GPS Flight Data. Portland, Oregon: Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation.
  • Alaqeeli, A., Starzyk, J., Van Graas, F. Real-Time Acquisition and Tracking for GPS Receivers. Bangkok, Thailand: 2003 IEEE International Symposium on Circuits and Systems (ISCAS 2003).
  • Kelly, J., DiBenedetto, M., Van Graas, F. A Dynamic GPS Multipath Model for Differential Reference Station Site Evaluation. Big Sky, MT: 2003 IEEE Aerospace Conference.
  • Van Graas, F., Soloviev, A. Precise Velocity Estimations Using Carrier-Phase Measurements from a Stand-Alone GPS. Anaheim, CA: Proceedings of the National Technical Meeting of The Institute of Navigation.
  • Soloviev, A., Van Graas, F. Review of Potential Applications of Low-Cost GPS/INS for General Aviation. Anaheim, CA: Proceedings of the National Technical Meeting of The Institute of Navigation.
  • Soloviev, A., Van Graas, F. Investigation into Performance Characteristics of Frequency Domain INS Calibration Procedure under Noisy GPS Environments. Portland, OR: Proceedings of the 15th International Technical Meeting of the Satellite Division of the ION.
  • Thornberg, D., Thornberg, D., DiBenedetto, M., Braasch, M., Van Graas, F., Bartone, C. The LAAS Integrated Multipath Limiting Antenna (IMLA). Portland, OR: Proceedings of the Fifteenth International Meeting of the Satellite Division of the Institute of Navigation (ION GPS-2002).
  • Soloviev, A., Van Graas, F. Mitigation of Coning and Sculling Errors by Frequency Domain Development of INS Algorithmic Part. Proceedings of the National Technical Meeting of the ION.
  • Marti, L., Van Graas, F., Kelly, J. The Effects of Aircraft Overflights on GPS Measurements. Proceedings of the National Technical Meeting of the ION.
  • Gunawardena, S., Van Graas, F. On Implementing GPS Block Processing Techniques in Fixed Point Programmable Hardware. Salt Lake City, UT: Proceedings of the International Technical Meeting of the Institute of Navigation Satellite Division.
  • Van Graas, F., Farrell, J. GPS/INS: A Very Different Way. Albuquerque, NM: Proceedings of the Annual Meeting of the ION.
  • Soloviev, A., Van Graas, F. Performance Enhancement of GPS/INS Systems by Frequency-Domain Implementation of Algorithmic Part. Saint Petersburg, Russia: 8th Saint Petersburg International Conference on Integrated Navigation Systems.
  • Van Graas, D., Van Graas, F. Aircraft Loran-C H-Field Antenna System Design and Flight Test. Long Beach, CA: Proceedings of the Technical Meeting of the ION.
  • Soloviev, A., Van Graas, F. Enhancement of GPS/INS Integrated System Performance Utilizing Frequency Domain Realization of INS Algorithms. Salt Lake City, UT: International Technical Meeting of the Institute of Navigation Satellite Division.
  • Mathur, N., Van Graas, F. Feasibility of Using a Low-Cost Inertial Measurement Unit with Centimeter-Level GPS. San Diego, CA: International Association of Institutes of Navigation World Congress in Association with the U.S. Institute of Navigation Annual Meeting; 712-720.
  • Saks, S., Farrell, J., Van Graas, F., Stevenson, J. Modern Generic IMU Interface Standard. San Diego, CA: International Association of Institutes of Navigation World Congress in Association with the U.S. Institute of Navigation Annual Meeting; 84-89.
  • Van Graas, F., Hall, J., Williams, II, R. Inertial Measurement Unit Calibration Platform. Cincinnati, OH: Proceedings of the Sixth Conference on Applied Mechanisms and Robotics.
  • Feng, G., Van Graas, F. GPS ReceiverBlock Processing. Nashville, TN: Proceedings of the ION GPS-99 meeting.
  • Gray, R., Van Graas, F. Inflight Detection of Errors for Enhanced Aircraft Flight Safety using DTED with GPS and Radar Altimeter. Nashville, TN: Proceedings of the ION GPS-99 meeting.
  • Van Graas, F., Aloi, D. Analysis of the Effects of Earth-Surface-Based Multipath Reflections on GPS Code Phase Measurements. Cambridge, MA: Proceedings of the Annual Meeting of The Institute of Navigation.
  • Snyder, C., Feng, G., Van Graas, F. GPS Anomalous Event Monitor. Cambridge, MA: Proceedings of the Annual Meeting of The Institute of Navigation.
  • Uijt de Haag, M., Van Graas, F. GPS/IMU Integration Using Block-Processing Techniques. Cambridge, MA: Proceedings of the Annual Meeting of The Institute of Navigation.
  • Skidmore, T., Van Graas, F., Uijt de Haag, M. Considerations for the FAA Category I Local Area Augmentation System Ground Specification. Denver, CO: Proceedings of the Institute of Navigation Annual Meeting.
  • Bartone, C., Van Graas, F. Airport Pseudolite for Local Area Augmentation. Palm Springs, CA: Institute of Electrical and Electronics Engineers, Position Location and Navigation Symposium (IEEE PLANS-98); 479-486.
  • Lee, S., Van Graas, F. A Preliminary Simulation Result of Integrating a LEO Satellite for Carrier Phase Differential Positioning Systems. Long Beach, CA: Proceedings of the National Technical Meeting of The Institute of Navigation.
  • Van Graas, F., Dutton, K. Experiments with Two-Satellite Attitude Determination. Kansas City, Missouri: Proceedings of the ION GPS-97 Meeting.
  • Skidmore, T., Van Graas, F., Uijt de Haag, M. Flight Test Results of the LAAS Navigation Augmentation Broadcast System. Kansas City, Missouri: Proceedings of the ION GPS-97 Meeting.
  • Van Graas, F., Diggle, D., Uijt de Haag, M., Skidmore, T., DiBenedetto, M., Wullschleger, V., Velez, R. Ohio University/FAA Flight Test Demonstration of Local Area Augmentation System (LAAS). Kansas City, Missouri: Proceedings of the ION GPS-97 Meeting.
  • Bartone, C., Van Graas, F. Airport Pseudolite for Precision Approach Applications. Kansas City, Missouri: Institute of Navigation - Global Positioning System 1997; 1841-1850.
  • Skidmore, T., Liu, F., Van Graas, F. Ohio University LAAS Monitoring: Design and Performance. Kansas City, Missouri: Proceedings of the ION GPS-96 Meeting.
  • Van Graas, F. GNSS Augmentation for High Precision Navigation Services. North Atlantic Treaty Organization Advisory Group for Aerospace Research & Development (NATO AGARD), Lecture Series 207: System Implications and Innovative Applications of Satellite Navigation.
  • Van Graas, F. Requirements on GNSS for Civil Navigation. North Atlantic Treaty Organization Advisory Group for Aerospace Research & Development (NATO AGARD), Lecture Series 207: System Implications and Innovative Applications of Satellite Navigation.
  • Van Graas, F. Signals Integrity. North Atlantic Treaty Organization Advisory Group for Aerospace Research & Development (NATO AGARD), Lecture Series 207: System Implications and Innovative Applications of Satellite Navigation.
  • Kaufmann, D., Van Graas, F., Swider, R., Enge, P., Wullschleger, V., Mackin, C., Velez, R., Braff, R., O'Donnell, P. FAA's CAT III Feasibility Program: Status and Accomplishments. Palm Springs, CA: Proceedings of the ION GPS-95 Meeting.
  • Van Graas, F., Diggle, D., Uijt de Haag, M., Wullschleger, V., Velez, R., Lamb, D., Dimeo, M., Kuehl, G., Hilb, R. FAA/Ohio University/United Parcel Service DGPS Autoland Flight Test Demonstration. Palm Springs, CA: Proceedings of the ION GPS-95 Meeting.
  • Van Graas, F., Diggle, D., Lake, L., Newman, S. Laboratory Testing of an Interferometric GPS Flight Reference System. Colorado Springs, CO: Proceedings of the 51st Annual Meeting of The Institute of Navigation.
  • Walter, T., Enge, P., Van Graas, F. Integrity for the Wide Area Augmentation System. Bergen, Norway: Proceedings of the Fourth International Conference on Differential Satellite Navigation Systems.
  • Van Graas, F., Diggle, D., Wullschleger, V., Velez, R., Kuehl, G., Hilb, R., Dimeo, M. FAA/Ohio University/UPS Autoland Flight Test Results. Anaheim, CA: Proceedings of the National Technical Meeting of The Institute of Navigation.
  • Van Graas, F., Lee, S. High-Accuracy Differential Positioning for Satellite-Based Systems Without Using Code-Phase Measurements. Anaheim, CA: Proceedings of the National Technical Meeting of The Institute of Navigation.
  • Skidmore, T., Van Graas, F. DGPS Ground Station Integrity Monitoring. San Diego, CA: Proceedings of the 1994 National Technical Meeting of The ION.
  • Farrell, J., Van Graas, F. Integrity Testing for GNSS Sole Means. San Diego, CA: Proceedings of the 1994 National Technical Meeting of The ION.
  • Van Graas, F., Diggle, D., Hueschen, R. Interferometric GPS Flight Reference/Autoland System: Flight Test Results. Salt Lake City, Utah: Proceedings of ION GPS-93.
  • Van Graas, F., Farrell, J. Baseline Fault Detection and Exclusion Algorithm. Cambridge, MA: Proceedings of the 49th Annual Meeting of The Institute of Navigation.
  • Skidmore, T., Van Graas, F. GPS Integrity Monitoring and Multipath Error Distributions. Cambridge, MA: Proceedings of the 49th Annual Meeting of The Institute of Navigation.
  • Van Graas, F. Toward Achieving Global Sole Means of Navigation. Ottawa, Canada: NATO AGARD, Guidance and Control Panel, Navigation Specialist's Meeting.
  • Braasch, M., Van Graas, F. Mitigation of Multipath in DGPS Ground Reference Stations. San Diego, CA: Proceedings of the Institute of Navigation National Technical Meeting.
  • Braasch, M., Van Graas, F. Guidance Accuracy Considerations for Realtime GPS Interferometry. Albuquerque, NM: ION GPS-91.
  • Farrell, J., Van Graas, F. Statistical Validation for GPS Integrity Test. Albuquerque, NM: Proceedings of the 4th International Meeting of the ION Satellite Division.
  • Van Graas, F., Braasch, M. GPS Interferometric Attitude and Heading Determination: Initial Flight Test Results. Williamsburg, VA: Proceedings of the 47th Annual Meeting of the Institute of Navigation.
  • Farrell, J., Van Graas, F. Receiver Autonomous Integrity Monitoring (RAIM): Techniques, Performance and Potential. Williamsburg, VA: Proceedings of the 47th Annual Meeting of The Institute of Navigation.
  • Van Graas, F. In-Flight Demonstration of Hybrid GPS/LORAN RAIM. Phoenix, AZ: Proceedings of The Institute of Navigation National Technical Meeting.
  • Farrell, J., Van Graas, F. That All-Important Interface. Colorado Springs, CO: Proceedings of the Third International Technical Meeting of the ION Satellite Division.
  • Van Graas, F., Kline, P. Integrated Inertial/GPS Navigation. NASA Conference Publication 3095.
  • Enge, P., Vicksell, F., Goddard, R., Van Graas, F. Analysis of Loran-C/GPS Interoperability for Air Navigation. Hyannis, MA: Proceedings of the 18th Annual Technical Symposium of the WGA.
  • Van Graas, F., Kline, P., Waid, J. Flight-Test Results for a Prototype Hybrid GPS/LORAN Receiver. Hyannis, MA: Proceedings of the 18th Annual Technical Symposium of the WGA.
  • Kelly, R., Van Graas, F., Kuhl, M. Improved Effectiveness of GPS RAIM Through Ridge Regression Signal Processing. Colorado Springs, CO: Proceedings of the 2nd International Satellite Division Meeting of the ION.
  • Van Graas, F. Interoperability of NAVSTAR GPS and LORAN-C. NASA Conference Publication 3028.
  • Van Graas, F. Integrated Multisensor Navigation Systems. NASA Conference Publication 2502.
  • Van Graas, F. Sole Means Navigation and Integrity Through Hybridized LORAN-C and NAVSTAR GPS. Santa Barbara, CA: Proceedings of the 5th National Technical Meeting of The Institute of Navigation.
  • Edwards, F., Hegarty, D., Turner, R., Van Graas, F., Sharma, S. Validating the Airborne and Ground Based Components of a Differential GPS System. Santa Barbara, CA: Proceedings of the 5th National Technical Meeting of the ION.
  • Van Graas, F. Sole Means Navigation and Integrity Through Hybridized LORAN-C and NAVSTAR GPS. Rockville, Maryland: Proceedings of the WGA Technical Conference.
  • Turner, R., Van Graas, F., Van Dierendonck, A., Hua, Q. Architecture and Performance of a Real Time Differential GPS Ground Station. Seattle, Washington: Proceedings of the 42nd Annual Meeting of the ION.

Other (1)

  • Van Graas, F., Braasch, M., Skidmore, T. Satellite-Based System Precision Approaches. Athens, Ohio: Avionics Engineering Center, Department of Electrical and Computer Engineering, Ohio University.

Book, Chapter in Non-Scholarly Book (1)

  • Van Graas, F., Braasch, M. “Selective Availability,” Chapter 17 of Global Positioning System: Theory and Applications. Washington, D.C.: American Institute of Aeronautics and Astronautics; 1.

Journal Article, Public or Trade Journal (1)

  • Morton, Y., Van Graas, F., Zhou, Q., Herdtner, J. Assessment of Second Order Ionosphere Error in GPS Range Observables using Arecibo Incoherent Scatter Radar Measurements. Radio Science; 44.

Patents

  • Van Graas, F., Soloviev, A., Gunawardena, S. Systems and Methods for Acquisition and Tracking of Low CNR GPS Signals. 8013789.
  • Uijt de Haag, M., Van Graas, F., Campbell, J. Precision approach guidance system and associated method . 7,920,943.
  • Van Graas, F., Soloviev, A., Gunawardena, S. Systems and Methods for Acquisition and Tracking of Low CNR GPS Signals. UK Patent No.: GB2435755.
  • Soloviev, A., Van Graas, F. Method and Apparatus for Using Multipath Signal in GPS Architecture.
  • Van Graas, F., Soloviev, A., Gunawardena, S. Systems and Methods for Acquisition and Tracking of Low CNR GPS Signals. WO/2006/137904.
  • Van Graas, F., Soloviev, A., Gunawardena, S. Systems and Methods for Acquisition and Tracking of Low CNR GPS Signals. 20060071851.
  • Van Graas, F., Campbell, J., Uijt de Haag, M. Precision Approach Guidance System and Associated Method.