Axelrad, Penina | CU Experts

Research

research overview

Professor Axelrad's primary research focus is on methods and applications for Global Navigation Satellite Systems (GNSS) or GPS. She is particularly interested in GNSS for aerospace applications and remote sensing using GNSS occultations and reflections. Her other research areas include more general problems in spacecraft orbit estimation for space situational awareness and autonomous rendezvous and docking.

keywords

Global Navigation Satellite Systems (GPS / GNSS) technology and applications, Space Situational Awareness

Publications

selected publications

book
- Global Positioning System: Theory and Applications. Ed. Axelrad, Penina. 1996
chapter
- GPS Navigation Algorithms. 409-433. 1996
conference proceeding
- A Framework for Regional GNSS Situational Awareness. 2452-2466. 2018
- Investigation of CSAC Driven One-Way Ranging Performance for CubeSat Navigation 2018
- A COMPARISON OF WAVEFORM MODEL RE-TRACKING METHODS USING DATA FROM CYGNSS. 4289-4292. 2018
- Assessing the Altimetric Measurement from CYGNSS Data. 8292-8295. 2018
- A Framework for Regional GNSS Situational Awareness. 2452-2466. 2017
- Boundaries on Range-Range Constrained Admissible Regions for Optical Space Surveillance 2017
- Harnessing Orbital Debris to Sense the Space Environment 2017
- Cubesat Cluster Deployment Tracking with a CPHD Filter 2017
- Multipath Modeling and Validation for GPS Onboard the International Space Station 2017
- Utilizing novel non-traditional sensor tasking approaches to enhance the space situational awareness picture maintained by the Space Surveillance Network 2016
- Characterization of Specialized Geosynchronous Elements for Space Situational Awareness Applications 2016
- Validation of GNSS Multipath Model for Space Proximity Operations Using the Hubble Servicing Mission 4 Experiment. 3635-3643. 2016
- Fast and Reliable GNSS Attitude Estimation Using a Constrained Bayesian Ambiguity Resolution Technique (C-BART). 2809-2820. 2015
- Evaluation of the GNSS Multipath Environment in Space Proximity Operations: Experimental and Simulation Studies of Code Correlations in Hubble Servicing Mission 4. 863-871. 2015
- Analysis of Error Sources in Phase Rate Measurements in GPS Radio Occultation. 1478-1491. 2014
- Characterization of Expected Multipath Error for the NICER X-Ray Telescope Payload. 2448-2456. 2014
- COMPARISON OF MULTITARGET FILTERING METHODS AS APPLIED TO SPACE SITUATIONAL AWARENESS. Advances in the Astronautical Sciences. 959-976. 2013
- Turbulence Retrievals from Radio Occultations 2013
- Detection of Atmospheric Turbulence in GPS-RO Amplitude Spectra. 3380-3391. 2012
- A NEW NUMERICAL INTEGRATION TECHNIQUE IN ASTRODYNAMICS. Advances in the Astronautical Sciences. 1709-+. 2012
- MINIMUM L1 NORM ORBIT DETERMINATION USING A SEQUENTIAL PROCESSING ALGORITHM. Advances in the Astronautical Sciences. 1457-1473. 2012
- EARTH ORIENTATION PARAMETER CONSIDERATIONS FOR PRECISE SPACECRAFT OPERATIONS. Advances in the Astronautical Sciences. 1919-1931. 2011
- OVERVIEW OF SPACE APPLICATIONS OF GLOBAL NAVIGATION SATELLITE SYSTEMS. Advances in the Astronautical Sciences. 23-35. 2011
- GEO Satellite Positioning Using GPS Collective Detection. 2706-2716. 2010
- Performance Analysis of Collective Detection of Weak GPS Signals. 3041-3053. 2010
- ANALYSIS OF SPECIALIZED COORDINATE REPRESENTATION FOR DYNAMIC MODELING AND ORBIT ESTIMATION IN THE GEOSYNCHRONOUS REGIME. Advances in the Astronautical Sciences. 2075-+. 2010
- Enhancing GNSS Acquisition by Combining Signals from Multiple Channels and Satellites. 2617-2628. 2009
- Effects of orbital perturbations on the performance of a relative navigation filter for high Earth orbits. Advances in the Astronautical Sciences. 819-848. 2007
- A Modular GPS Remote Sensing Software Receiver for Small Platforms. 634-642. 2006
- Assessment of Digital Terrain Models for Multipath Prediction at Geodetic GNSS Installations. 2815-2823. 2006
- Measurement of backscattered GPS signals. 664-+. 2006
- Analysis of relative navigation in highly eccentric orbits. Advances in the Astronautical Sciences. 291-+. 2006
- Airborne GPS bistatic radar soil moisture measurements during SMEX02. 896-898. 2003
- Seasonal polarimetric measurements of soil moisture using tower-based GPS bistatic radar. 781-783. 2003
- Automated operational orbit determination for the ICESat mission. Advances in the Astronautical Sciences. 399-414. 2003
- Applications of drag-free technology to precision satellite navigation. Advances in the Astronautical Sciences. 1757-1768. 2001
- GPS-based remote sensing of ocean-surface wind speed from space. 2522-2524. 2001
- Student reflected GPS experiment (SuRGE). 1518-1520. 2001
- ICESat attitude algorithm for maintained reference groundtrack pointing. Advances in the Astronautical Sciences. 1115-1130. 1999
- Reducing selective availability effects on post-processed orbits for satellites with limited GPS telemetry. Advances in the Astronautical Sciences. 1477-1489. 1999
- Adaptive detection of code delay and multipath in a simplified GPS signal model. 569-581. 1997
- Initial demonstration of a point solution algorithm for orbit determination using the microGPS receiver. 377-386. 1997
- The student nitric oxide explorer. 121-132. 1996
- Application of the extended Kalman filter for relative navigation in an elliptical orbit. Advances in the Astronautical Sciences. 693-712. 1996
- Precision orbit determination for GFO and GFO-2. Advances in the Astronautical Sciences. 1331-1342. 1996
- A comparison of GPS-based attitude estimation techniques for spinning satellite. 1785-1796. 1995
- Relative motion in highly elliptical orbits. Advances in the Astronautical Sciences. 1359-1376. 1995
- AN INTEGRATED GPS ATTITUDE DETERMINATION SYSTEM FOR JAWSAT. 1251-1261. 1994
- THE USE OF GPS BUOYS TO CALIBRATE ALTIMETRIC SATELLITES. 221-230. 1994
- USE OF SIGNAL-TO-NOISE RATIO FOR MULTIPATH ERROR CORRECTION IN GPS DIFFERENTIAL PHASE MEASUREMENTS - METHODOLOGY AND EXPERIMENTAL RESULTS. 655-666. 1994
- DISTURBANCE LEARNING CONTROL FOR SMALL SATELLITES. 2882-2886. 1994
- ON-ORBIT GPS BASED ATTITUDE & ANTENNA BASELINE ESTIMATION. 441-450. 1994
journal article
- Search-Detect-Track Sensor Allocation for Geosynchronous Space Objects. IEEE Transactions on Aerospace and Electronic Systems. 2788-2808. 2018
- Parallel initial orbit determination using angles-only observation pairs. Celestial Mechanics and Dynamical Astronomy. 2018
- Global Ocean Altimetry With GNSS Reflections From TechDemoSat-1. IEEE Transactions on Geoscience and Remote Sensing. 4088-4097. 2018
- Improved prediction of GPS satellite clock sub-daily variations based on daily repeat. GPS Solutions. 2018
- Sensor Allocation for Tracking Geosynchronous Space Objects. Journal of Guidance, Control, and Dynamics. 149-163. 2018
- An Assessment of the Precision and Accuracy of Altimetry Retrievals for a Monterey Bay GNSS-R Experiment. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 4660-4668. 2016
- Influence of ITRS/GCRS implementation for astrodynamics: Coordinate transformations. Advances in Space Research. 850-866. 2016
- Bandlimited implicit Runge-Kutta integration for Astrodynamics. Celestial Mechanics and Dynamical Astronomy. 143-168. 2014
- Satellite clock bias estimation for iGPS. GPS Solutions. 381-389. 2013
- Observability of Relative Hybrid Elements, Given Space-Based Angles-Only Observations. Journal of Guidance, Control, and Dynamics. 1681-1686. 2012
- Along-Track Separation Uncertainty Modeling Given Space-Based Optical Observations. Journal of Guidance, Control, and Dynamics. 732-739. 2012
- Progress in turbulence detection via GNSS occultation data. Atmospheric Measurement Techniques. 789-808. 2012
- A Study of the Achievable Geosynchronous Angles-Only Orbit Estimation Accuracy. Journal of the Astronautical Sciences. 275-290. 2011
- Specialized Coordinate Representation for Dynamic Modeling and Orbit Estimation of Geosynchronous Orbits. Journal of Guidance, Control, and Dynamics. 1824-1836. 2010
- Bistatic Scattering of GPS Signals Off Arctic Sea Ice. IEEE Transactions on Geoscience and Remote Sensing. 1548-1553. 2010
- Mounting-Angle Estimation for Personal Navigation Devices. IEEE Transactions on Vehicular Technology. 1129-1138. 2010
- Mars Aerobraking Spacecraft State Estimation by Processing Inertial Measurement Unit Data. Journal of Guidance, Control, and Dynamics. 1802-1813. 2008
- Using GPS multipath to measure soil moisture fluctuations: initial results. GPS Solutions. 173-177. 2008
- Modeling GPS phase multipath with SNR: Case study from the Salar de Uyuni, Boliva. Journal of Geophysical Research. Solid Earth. 2008
- Improving the precision of high-rate GPS. Journal of Geophysical Research. Solid Earth. 2007
- Analysis of relative navigation in high earth orbits. Journal of the Astronautical Sciences. 23-52. 2007
- Sea ice roughness from airborne LIDAR profiles. IEEE Transactions on Geoscience and Remote Sensing. 3032-3037. 2006
- Automated operational orbit determination for the Ice Cloud and Land Elevation Satellite mission. Journal of Spacecraft and Rockets. 1048-1053. 2006
- Formation design in eccentric orbits using linearized equations of relative motion. Journal of Guidance, Control, and Dynamics. 146-160. 2006
- Modified sidereal filtering: Implications for high-rate GPS positioning. Geophysical Research Letters. 2004
- Initial results of land-reflected GPS bistatic radar measurements in SMEX02. Remote Sensing of Environment. 507-520. 2004
- Using GPS reflections for satellite remote sensing. Acta Astronautica. 39-49. 2004
- Retrieval of ocean surface wind speed and wind direction using reflected GPS signals. Journal of Atmospheric and Oceanic Technology. 515-526. 2004
- Application of successive interference cancellation to the GPS pseudolite near-far problem. IEEE Transactions on Aerospace and Electronic Systems. 481-488. 2003
- Orbit determination for the QuikSCAT spacecraft. Journal of Spacecraft and Rockets. 852-858. 2002
- GPS signal scattering from sea surface: Wind speed retrieval using experimental data and theoretical model. Remote Sensing of Environment. 162-174. 2000
- Satellite attitude determination based on GPS signal-to-noise ratio. Proceedings of the IEEE. 133-144. 1999
- Ill-conditioned covariance matrices in the first-order two-step estimator. Journal of Guidance, Control, and Dynamics. 754-760. 1998
- Precision orbit determination for the GEOSAT Follow-On satellites. Journal of Spacecraft and Rockets. 336-341. 1998
- Adaptive SNR-based carrier phase multipath mitigation technique. IEEE Transactions on Aerospace and Electronic Systems. 264-276. 1998
- Attitude estimation algorithms for spinning satellites using global positioning system phase data. Journal of Guidance, Control, and Dynamics. 164-169. 1997
- Spacecraft attitude estimation using the global positioning system: Methodology and results for RADCAL. Journal of Guidance, Control, and Dynamics. 1201-1209. 1996
- The analysis of GPS attitude data from a slowly rotating, symmetrical gravity gradient satellite. Journal of the Astronautical Sciences. 515-539. 1996
- SNR-based multipath error correction for GPS differential phase. IEEE Transactions on Aerospace and Electronic Systems. 650-660. 1996
- CALIBRATION OF THE TOPEX ALTIMETER USING A GPS BUOY. Journal of Geophysical Research: Oceans. 24517-24526. 1994

editor of

book
- Global Positioning System: Theory and Applications 1996

Teaching

courses taught

ASEN 2003 Aerospace 3: Introduction to Dynamics and Systems (Spring 2019)
ASEN 2849 Independent Study (Spring 2019)
ASEN 4849 Independent Study (Spring 2019)
ASEN 5018 Graduate Projects I (Spring 2019)
ASEN 5849 Independent Study (Spring 2019)
ASEN 6028 Graduate Projects II (Spring 2019)
ASEN 6849 Independent Study (Spring 2019)
ASEN 6949 Master's Candidate for Degree (Spring 2019)
ASEN 6950 Master's Thesis (Spring 2019)
ASEN 8990 Doctoral Thesis (Spring 2019)
ASEN 2849 Independent Study (Fall 2018)
ASEN 4849 Independent Study (Fall 2018)
ASEN 5090 Introduction to Global Navigation Satellite Systems (Fall 2018)
ASEN 5849 Independent Study (Fall 2018)
ASEN 6849 Independent Study (Fall 2018)
ASEN 6949 Master's Candidate for Degree (Fall 2018)
ASEN 6950 Master's Thesis (Fall 2018)
ASEN 8990 Doctoral Thesis (Fall 2018)
ASEN 2849 Independent Study (Summer 2018)
ASEN 4849 Independent Study (Summer 2018)
ASEN 5849 Independent Study (Summer 2018)
ASEN 6849 Independent Study (Summer 2018)
ASEN 8990 Doctoral Thesis (Summer 2018)
ASEN 2849 Independent Study (Spring 2018)
ASEN 4849 Independent Study (Spring 2018)
ASEN 5849 Independent Study (Spring 2018)
ASEN 6849 Independent Study (Spring 2018)
ASEN 6949 Master's Candidate for Degree (Spring 2018)
ASEN 6950 Master's Thesis (Spring 2018)
ASEN 8990 Doctoral Thesis (Spring 2018)

Background

education and training

Ph.D., Stanford University 1991
M.S., Massachusetts Institute of Technology 1986
B.S., Massachusetts Institute of Technology 1985

awards and honors

Membership (National Academy of Engineering), conferred by National Academy of Engineering, 2019
Aerospace Educator Award (Women in Aerospace), conferred by Women in Aerospace, 2015
Engr Dean's Performance Awards in Professional Progress (College of Engineering and Applied Science), conferred by College of Engineering and Applied Science, 2011
Summerfield Book Award (American Institute of Aeronautics and Astronautics), conferred by American Institute of Aeronautics and Astronautics, 2011
Burka Award (Institute of Navigation), conferred by Institute of Navigation, 2011
Johannes Kepler Award (Institute of Navigation), conferred by Institute of Navigation, 2009
AIAA Fellow (American Institute of Aeronautics and Astronautics), conferred by American Institute of Aeronautics and Astronautics, 2008
Fellow (Institute of Navigation), conferred by Institute of Navigation, 2004
Tycho Brahe Award (Institute of Navigation), conferred by Institute of Navigation, 2002

CU Experts

Axelrad, Penina The Nagler Endowed Professor

Positions

Research Areas

Research

research overview

keywords

Publications

selected publications

book

chapter

conference proceeding

journal article

editor of

book

Teaching

courses taught

Background

education and training

awards and honors

International Activities

global connections related to teaching and scholarly work (in recent years)

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