Single Platform Relative Positioning for Sensor Stabilization
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Ohio University / OhioLINK
2008
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1210187565 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou12101875652021-08-03T05:45:41Z Single Platform Relative Positioning for Sensor Stabilization Dickman, Jeff Electrical Engineering Engineering GPS INS multipath sensor stabilization high accuracy relative positioning navigation carrier phase <p>Intelligence, Surveillance, and Reconnaissance (ISR) sensors such as radio detecting and ranging, laser detecting and ranging, electro-optic / infra-red, and other remote sensing activities are becoming increasingly dependent on their position and orientation in time and space. The higher dynamics of flight and the increased sensor requirements have led to the need for sensor stabilization by direct motion measurement. A stabilization system based on the Global Positioning System (GPS) can provide good performance, but high frequency ISR sensor pointing applications have led to the need for additional measurement bandwidth, accuracy, and robustness. Two significant issues will be addressed in this dissertation to improve the stabilization system robustness and accuracy at the mm level: GPS Carrier Phase measurement noise using inertial measurements and carrier phase multipath. Higher bandwidth requirements (i.e., hundreds of Hz) will be addressed with the incorporation of a high-rate inertial measurement unit. All concepts developed in this dissertation will be illustrated using real sensor data from either static aircraft tests on the tarmac or dynamic flight tests. </p><p>The work to be described in this document will expand the state-of-the-art in the area of navigation sensor noise reduction while preserving high measurement bandwidth. Coupling GPS and inertial measurements has demonstrated the required improvements in similar applications, but an approach was sought which was tailored for the stabilization application. This dissertation will examine both optimal and non-optimal coupling of navigation sensors to form optimized high-accuracy single-platform relative position measurements with the intent to coherently stabilize ISR sensors. </p><p>This dissertation also examines GPS carrier phase multipath as an error contributor in the ground calibration of the ISR sensor antenna baseline. Several indicators will be examined as a means to exclude satellites from the calibration data. Also, the narrowlane measurement combination technique will be used as a means to mitigate the remaining carrier phase multipath in the baseline solution. </p><p>The contributions of this work include a framework for the single-platform stabilization problem, sensor integration and alignment techniques for single-platform baseline stabilization, an inertial synthesized baseline technique for smoothing noise in the GPS measurements, multipath considerations pertaining to the ground-calibration of sensors, and a demonstration of the utility of the narrow-lane linear combination for dual frequency GPS noise and multipath reduction.</p> 2008-07-18 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1210187565 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1210187565 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Electrical Engineering Engineering GPS INS multipath sensor stabilization high accuracy relative positioning navigation carrier phase |
| spellingShingle |
Electrical Engineering Engineering GPS INS multipath sensor stabilization high accuracy relative positioning navigation carrier phase Dickman, Jeff Single Platform Relative Positioning for Sensor Stabilization |
| author |
Dickman, Jeff |
| author_facet |
Dickman, Jeff |
| author_sort |
Dickman, Jeff |
| title |
Single Platform Relative Positioning for Sensor Stabilization |
| title_short |
Single Platform Relative Positioning for Sensor Stabilization |
| title_full |
Single Platform Relative Positioning for Sensor Stabilization |
| title_fullStr |
Single Platform Relative Positioning for Sensor Stabilization |
| title_full_unstemmed |
Single Platform Relative Positioning for Sensor Stabilization |
| title_sort |
single platform relative positioning for sensor stabilization |
| publisher |
Ohio University / OhioLINK |
| publishDate |
2008 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1210187565 |
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AT dickmanjeff singleplatformrelativepositioningforsensorstabilization |
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