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You searched for subject:(geoPebble). Showing records 1 – 2 of 2 total matches.

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Penn State University

1. Conway, Michael J. Large-scale Wireless Sensor Networks in Harsh Environments.

Degree: 2012, Penn State University

Originally developed for military applications, wireless sensor networks have become an important research topic and have been adapted for numerous applications. Global warming has also become an important research topic with particular emphasis on the study of ice sheets. This work couples the research interest in wireless sensor networks and the study of ice sheets by developing the geoPebble wireless sensor network. Not only will the geoPebble network provide geoscientists with invaluable knowledge about ice sheets, but it provides a path for the development of large-scale sensor networks. The geoPebble network is targeted for the ice sheets of Antarctica, which present numerous challenges. This work addresses the challenge of making an RF link between each geoPebble and the base station. It is shown that, although snow typically presents a major challenge with RF links, Antarctic snow is unique in that it does not severely attenuate an RF wave. Using this fact, a Snow{Air model is presented to predict the total attenuation an RF wave experiences as it travels from a geoPebble buried in the snow to a nearby access point. Finally, three deployment scenarios are presented: a 200-m square grid, 1000-m square grid, and a 1414-m square grid. It is shown that a link meeting throughput requirements is possible in each of these deployment scenarios. Advisors/Committee Members: Sven G Bilen, Thesis Advisor/Co-Advisor.

Subjects/Keywords: Wireless Sensor Network; WSN; geoPebble

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Conway, M. J. (2012). Large-scale Wireless Sensor Networks in Harsh Environments. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15502

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Conway, Michael J. “Large-scale Wireless Sensor Networks in Harsh Environments.” 2012. Thesis, Penn State University. Accessed April 10, 2021. https://submit-etda.libraries.psu.edu/catalog/15502.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Conway, Michael J. “Large-scale Wireless Sensor Networks in Harsh Environments.” 2012. Web. 10 Apr 2021.

Vancouver:

Conway MJ. Large-scale Wireless Sensor Networks in Harsh Environments. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Apr 10]. Available from: https://submit-etda.libraries.psu.edu/catalog/15502.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Conway MJ. Large-scale Wireless Sensor Networks in Harsh Environments. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/15502

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Penn State University

2. Volpe, Marc. Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval.

Degree: 2019, Penn State University

The GlacierHawk Unmanned Aerial System (UAS) serves as a data retrieval platform in support of the geoPebble sensor system developed at the Pennsylvania State University. The mission of the distributed sensor network is to wirelessly collect seismic and movement data across areas of interest on glacial surfaces over a multi-day deployment period. Due to the cragginess and volatility of the ice, the sensors are inaccessible except by air and may not be recoverable at the end of the defined deployment period. Should a sensor be lost to ice calving or system failure, some or all of its data may be lost, so the ability to retrieve data on demand during a deployment is of significant value. Furthermore, beyond serving as a backup, mid-deployment retrieval provides earlier access for analysis during longer deployments. The cost, risk, logistics, and required expertise of helicopter-based access to the geoPebbles makes such a method infeasible except for sensor installation and removal, so the concept of a drone-based solution quickly becomes attractive. This thesis outlines the design, development, and concept of operations of the GlacierHawk UAS, from initial concept generation to field testing over Helheim Glacier in southeast Greenland. The importance of endurance to the geoPebble mission, coupled with Helheim’s remote, austere operating environment, make battery selection and rugged, modular design two of the most critical factors in this application. To accommodate transport and field assembly, the GlacierHawk’s thin-walled composite airframe consists of a square-section fuselage tube and two cylindrical arm tubes, both of which are durable and easily removable. Battery storage and most cable routing are internal, whereas the Pixhawk autopilot, sensors, and Wi-Fi access point payload are externally mounted. The construction process leverages conventional production methods and materials with composites and additive manufacturing. Commercial-off-the-shelf components and systems are also leveraged with custom fabrication whenever suitable. During field testing with a deployed sensor array, the resulting 11.6-kg, 30+-minuteendurance quadcopter demonstrated the capability of flying glacier transit profiles and facilitating geoPebble data retrieval. Insights gained from the Greenland proof-of-concept mission are presented as concepts for implementation in future vehicle designs and field deployments. Identified areas for improvement include, among others, robustness of the positioning system and data links, redesigned landing gear, motor tilt for improved maneuverability, and increased endurance to support longer, more complex mission profiles. Advisors/Committee Members: Jacob Willem Langelaan, Thesis Advisor/Co-Advisor, Sridhar Anandakrishnan, Committee Member, Amy Ruth Pritchett, Program Head/Chair, Sven G Bilen, Committee Member.

Subjects/Keywords: Unmanned Aerial System; glaciology; geoscience; aircraft design; aerospace engineering; rotorcraft; flight; Greenland; Helheim; glacier; geoPebble; sensor

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Volpe, M. (2019). Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/17310mrv12

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Volpe, Marc. “Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval.” 2019. Thesis, Penn State University. Accessed April 10, 2021. https://submit-etda.libraries.psu.edu/catalog/17310mrv12.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Volpe, Marc. “Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval.” 2019. Web. 10 Apr 2021.

Vancouver:

Volpe M. Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval. [Internet] [Thesis]. Penn State University; 2019. [cited 2021 Apr 10]. Available from: https://submit-etda.libraries.psu.edu/catalog/17310mrv12.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Volpe M. Design, Development, and Field Testing of the GlacierHawk: an Unmanned Aerial System for Geoscience Data Retrieval. [Thesis]. Penn State University; 2019. Available from: https://submit-etda.libraries.psu.edu/catalog/17310mrv12

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.