{"657791":{"#nid":"657791","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - David Richardson","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003EUnifying VLF Transmitter and Lightning-driven D-Region Ionosphere Remote Sensing\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Cohen, Advisor\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Peterson, Chair\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Anderson\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003EThe objective of the proposed research is to develop a model of the D-region ionosphere\u0026rsquo;s electron density by leveraging both VLF transmitter and lightning driven remote sensing techniques. The D-region ionosphere (60\u0026minus;90 km in altitude) plays an important role in long-range and aviation communication systems, and it responds to space weather disturbances. Unfortunately, due to its altitude range, it is difficult to directly measure the D region\u0026rsquo;s electrical properties. The D region lies above the altitudes reachable by high-altitude balloons and below the altitudes reachable by satellites. Sounding rocket measurements are possible, and have been done in the past; however, they are costly and difficult to use on a large scale. Instead, very low frequency (VLF, 3\u0026minus;30 kHz) and low frequency (LF, 30\u0026minus;300 kHz) waves have been used to infer various properties of the D-region. Existing techniques have relied on either VLF transmitters or emissions from lightning, known as sferics, but never together in one model as the two are very different. VLF transmitters provide a steady and reliable, but narrow-frequency, signal, while sferics are chaotic and spatially random, but broadband. In this document, the current state of the art for both transmitter-based and sferic-based techniques is explored. Additionally, methods for unifying these two differing approaches are proposed.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Unifying VLF Transmitter and Lightning-driven D-Region Ionosphere Remote Sensing"}],"uid":"28475","created_gmt":"2022-04-29 07:44:00","changed_gmt":"2022-04-29 07:44:00","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-05-16T14:00:00-04:00","event_time_end":"2022-05-16T16:00:00-04:00","event_time_end_last":"2022-05-16T16:00:00-04:00","gmt_time_start":"2022-05-16 18:00:00","gmt_time_end":"2022-05-16 20:00:00","gmt_time_end_last":"2022-05-16 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434371","name":"ECE Ph.D. Proposal Oral Exams"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"},{"id":"1808","name":"graduate students"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}