{"id":179,"date":"2024-03-11T05:23:17","date_gmt":"2024-03-11T05:23:17","guid":{"rendered":"https:\/\/engineering.purdue.edu\/RNL\/?page_id=179"},"modified":"2026-10-22T22:29:23","modified_gmt":"2026-10-22T22:29:23","slug":"people","status":"publish","type":"page","link":"https:\/\/engineering.purdue.edu\/RNL\/people\/","title":{"rendered":"People"},"content":{"rendered":"\n
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James L. Garrison<\/h2>\n\n\n\n

Lab Director<\/strong><\/p>\n\n\n\n

2000 – Professor of Aeronautics and Astronautics
Professor of Electrical and Computer Engineering (by courtesy)
University Faculty Scholar, 2022-2027<\/strong><\/p>\n\n\n\n

Interests<\/h3>\n\n\n\n

Earth remote sensing, Global Navigation Satellite Systems (GNSS), bistatic radar, signals of opportunity.<\/p>\n\n\n\n

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More<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

Ph.D. Students<\/h1>\n\n\n\n
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Siddharth Subramanyam<\/strong><\/a><\/p>\n\n\n\n

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Weihang Li<\/strong><\/a><\/p>\n<\/div>\n\n\n\n

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Rozaine Wijekularatne<\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Archana Choudhari<\/a><\/strong><\/p>\n<\/div>\n\n\n\n

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Jordan Alexander<\/a><\/strong><\/p>\n<\/div>\n\n\n\n

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Divya Krishnan<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Abi Komanduru<\/strong><\/p>\n<\/div>\n\n\n\n

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William Yu<\/strong><\/p>\n<\/div>\n\n\n\n

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<\/p>\n<\/div>\n<\/div>\n\n\n\n

Master’s Students<\/h1>\n\n\n\n
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Megan Collins<\/strong><\/p>\n<\/div>\n\n\n\n

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Jackson Braun<\/a><\/h4>\n<\/div>\n\n\n\n
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Undergraduate Students <\/h2>\n\n\n\n
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Elena Lehner<\/strong><\/p>\n<\/div>\n\n\n\n

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Graduated Ph.D. Alumni <\/h2>\n\n\n\n

Kevin Shi<\/a><\/strong>, Ph.D.,2026, ASSIMILATION OF GNSS-R OBSERVABLES INTO A ONE-DIMENSIONAL HYDROLOGICAL MODEL FOR ROOT ZONE SOIL MOISTURE ESTIMATION<\/p>\n\n\n\n

Priyankar Bhattacharjee<\/a><\/strong>, Ph.D.,2026, Ocean surface wind field retrieval from GNSS-R delay Doppler maps using a sequential estimator and collection of an airborne GNSS-R dataset for future model improvement<\/p>\n\n\n\n

Seho Kim<\/a><\/strong>, Ph.D., 2023, Multiple Signals Of Opportunity For Land Remote Sensing<\/p>\n\n\n\n

Benjamin Nold<\/strong>, Ph.D., 2023, Spaceborne Demonstration of P-band Signals of Opportunity Remote Sensing: Instrument Modeling and Validation<\/p>\n\n\n\n

Soon Chye Ho<\/strong>, Ph.D., 2021, Wideband Ocean Altimetry Using Ku and K-band Satellite Signals of Opportunity (SoOp)<\/p>\n\n\n\n

Huang, Feixiong<\/strong>, Ph.D., 2020, Assimilation of GNSS-R Delay-Doppler Maps into Weather Models<\/p>\n\n\n\n

Zhang, Han<\/strong>, Ph.D., 2019, New Algorithms for Ocean Surface Wind Retrievals Using Multi-Frequency Signals of Opportunity<\/p>\n\n\n\n

Lin, Yao-Cheng<\/strong>, Ph.D., 2017, Multi-Frequency Remote Sensing of Soil Moisture with Signal of Opportunity<\/p>\n\n\n\n

Benjamin Ashman<\/strong>, Ph.D., 2016, Incorporation of GNSS Multipath to Improve Autonomous Rendezvous, Docking, and Proximity Operations in Space<\/p>\n\n\n\n

Lee, See-Chen (Gary)<\/strong>, Ph.D. 2015, Simulated GPS Observation of Traveling Ionospheric Disturbance from Ground-Based Receivers<\/p>\n\n\n\n

Wang, <\/span>Kuo-Nung (Eric)<\/strong>, Ph.D. 2015, Signal Analysis and Radioholographic Methods for Airborne Radio Occultations<\/p>\n\n\n\n

Rashmi Shah<\/strong>, Ph.D. 2014, Remote Sensing of Ocean Surface Using Digital Communication Signals<\/p>\n\n\n\n

Alinda Mashiku (Aligawesa)<\/strong>, Ph.D., 2013, Information Measures in Statistical Orbit Determination<\/p>\n\n\n\n

Yang, Yu-Ming (Oscar)<\/strong>, Ph.D., 2013, A Study of Wavelet Approaches to the Detection of Ionospheric Disturbances<\/p>\n\n\n\n

Paytsar Muradyan<\/strong>, Ph.D. 2012, Profiling the Atmosphere with the Airborne Radio Occultation Technique,\u201d 2012 (Co-advised with Jennifer Haase)<\/p>\n\n\n\n

You, Huai-Tzu<\/strong>, Ph.D. 2005, Stochastic Model for Ocean Surface Reflected GPS Signals and Satellite Remote Sensing Applications<\/p>\n\n\n\n

Nesreen Ziedan<\/strong>, Ph.D. 2004, Global Navigation Satellite System Receiver for Weak Signals Under All Dynamic Conditions<\/p>\n\n\n\n

Graduated Master’s Alumni <\/h2>\n\n\n\n

Eric Smith, 2025<\/p>\n\n\n\n

Elisa Rivera<\/strong>, 2023, A Comparative Study Of Three Methods Used Inglobal Navigation Satellite Systemreflectometry (Gnss-r) For Specular Point Calculation Applied To Signals Of Opportunity P-band Investigation (Snoopi)<\/p>\n\n\n\n

Sidd Subramanyam<\/strong>, 2021, Time Delay of Arrival Based Orbit Determination of Geosynchronous Signals of Opportunity<\/p>\n\n\n\n

Archana Suhas Choudhari,<\/strong> 2020, Surface Soil Moisture Retrieval Using Reflectometry of S-Band Signals of Opportunities<\/p>\n\n\n\n

Jared Covert<\/strong>, 2020, Unmanned Aerial Vehicle Remote Sensing of Soil Moisture With I-Band Signals of Opportunity<\/p>\n\n\n\n

Benjamin Nold<\/strong>, 2019, Design of an Instrument for Soil Moisture and Above Ground Biomass Remote Sensing using Signals of Opportunity<\/p>\n\n\n\n

Abi Komanduru<\/strong>, 2016, Remote Sensing of Snow Using Bistatic Radar Reflectometry<\/p>\n\n\n\n

Nick Rainville<\/strong>, 2014, Design and testing of an airborne receiver for signals of opportunity, using field programmable gate arrays<\/p>\n\n\n\n

Ulvi Acikoz<\/strong>, 2011, Open Loop Tracking of Rising GPS Occultations from an Airborne Platform<\/p>\n\n\n\n

Michael Walker<\/strong>, 2011, Extended Propagation GNSS Ephemerides Employing Measurement Fusion<\/p>\n\n\n\n

Rashmi Shah<\/strong>, 2010, Analysis of the Correlation Properties of Digital Satellite Signals and Their Applicability in Bistatic Remote Sensing<\/p>\n\n\n\n

Paul Creekmore<\/strong>, 2010, Open-Loop Signal Tracking for Alt-BOC Modulated GNSS Signals<\/p>\n\n\n\n

Tyler Lulich<\/strong>, 2010, Open Loop Tracking of Radio Occultation Signals from an Airborne Platform<\/p>\n\n\n\n

Gregory W. Heckler<\/strong>, 2006, Implementation and Testing of an Unaided Method for the Acquisition of Weak GPS C\/A Code Signals<\/p>\n\n\n\n

Brian Ventre<\/strong>, 2006, Open-Loop Tracking of an Occulting GNSS Signal<\/p>\n\n\n\n

Brenda Eichel<\/strong>, 2005, Model-Based Compression of GPS Ephemerides<\/p>\n\n\n\n

Dino Smajlovic<\/strong>, 2005, Obtaining Ocean Roughness Statistics From Reflected GPS Signals<\/p>\n\n\n\n

See-Chen (Gary) Lee<\/strong>, 2005, Investigation of Transient Ionospheric Perturbation Observed in the GPS Signal<\/p>\n\n\n\n

Liang Liang<\/strong>, 2004, Numerical Simulation of GPS Code Tracking Loops<\/p>\n\n\n\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

Ph.D. Students Siddharth Subramanyam Weihang Li Rozaine Wijekularatne Archana Choudhari Jordan Alexander Divya Krishnan Abi Komanduru William Yu Master’s Students Megan Collins Jackson Braun Undergraduate Students Elena Lehner Graduated Ph.D. Alumni Kevin Shi, Ph.D.,2026, ASSIMILATION OF GNSS-R OBSERVABLES INTO A ONE-DIMENSIONAL HYDROLOGICAL MODEL FOR ROOT ZONE SOIL MOISTURE ESTIMATION Priyankar Bhattacharjee, Ph.D.,2026, Ocean surface wind … <\/p>\n

Read more “People”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":69,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-179","page","type-page","status-publish","has-post-thumbnail","hentry"],"featured_media_urls":{"thumbnail":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-150x150.jpg",150,150,true],"medium":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-300x169.jpg",300,169,true],"medium_large":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-768x432.jpg",768,432,true],"large":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-1024x576.jpg",950,534,true],"1536x1536":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-1536x864.jpg",1536,864,true],"2048x2048":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-2048x1152.jpg",2048,1152,true],"inspiro-featured-image":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-2000x1125.jpg",2000,1125,true],"inspiro-loop":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-950x320.jpg",950,320,true],"inspiro-loop@2x":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-1900x640.jpg",1900,640,true],"portfolio_item-thumbnail":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-600x400.jpg",600,400,true],"portfolio_item-masonry":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-600x338.jpg",600,338,true],"portfolio_item-thumbnail_cinema":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-800x335.jpg",800,335,true],"portfolio_item-thumbnail_portrait":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-600x900.jpg",600,900,true],"portfolio_item-thumbnail_square":["https:\/\/engineering.purdue.edu\/RNL\/wp-content\/uploads\/2023\/03\/3ScvWqzRiSvnv8cWtM46Xa-1-800x800.jpg",800,800,true]},"_links":{"self":[{"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/pages\/179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/comments?post=179"}],"version-history":[{"count":53,"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/pages\/179\/revisions"}],"predecessor-version":[{"id":502,"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/pages\/179\/revisions\/502"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/media\/69"}],"wp:attachment":[{"href":"https:\/\/engineering.purdue.edu\/RNL\/wp-json\/wp\/v2\/media?parent=179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}