{"id":{"repo_id":"rice","oai_identifier":"oai:repository.rice.edu:1911/104100"},"canonical_url":"https://search.dev.ndltd.org/etd/rice/oai:repository.rice.edu:1911/104100","repository":{"repo_id":"rice","name":"Rice University","base_url":"https://repository.rice.edu/server/oai/request"},"display":{"title":"Stratospheric scattering of radio waves and the Jicamarca radio telescope","abstract":"Radar backscatter from the 15 to 35 km height range provides information about the dynamics and turbulent mixing of the stratosphere. The 3-dimensional space spectrum of turbulent fluctuations, the mean wind velocity, and the root-mean-square velocity fluctuations are directly related to the autocorrelation function of the scattered signals. The theory and mechanisms of stratospheric scattering of radio waves is discussed. The equipment and procedures used in previous experiments at the Jicamarca Radio Observatory are examined in detail, and are found to require modification in some cases. The theory of phased arrays is presented, and the correct and complete array factor pertinent to the Jicamarca antenna is derived. Information about the side lobes and precise positions of various beams is considered, and three beams are selected for use in a proposed stratospheric backscatter experiment. The phasing cables needed for the implementation of two off-vertical beams are available at the observatory, while new phasing cables must be manufactured for the realization of the vertical beam.","abstract_html":"Radar backscatter from the 15 to 35 km height range provides information about the dynamics and turbulent mixing of the stratosphere. The 3-dimensional space spectrum of turbulent fluctuations, the mean wind velocity, and the root-mean-square velocity fluctuations are directly related to the autocorrelation function of the scattered signals. The theory and mechanisms of stratospheric scattering of radio waves is discussed. The equipment and procedures used in previous experiments at the Jicamarca Radio Observatory are examined in detail, and are found to require modification in some cases. The theory of phased arrays is presented, and the correct and complete array factor pertinent to the Jicamarca antenna is derived. Information about the side lobes and precise positions of various beams is considered, and three beams are selected for use in a proposed stratospheric backscatter experiment. The phasing cables needed for the implementation of two off-vertical beams are available at the observatory, while new phasing cables must be manufactured for the realization of the vertical beam.","abstract_has_math":false,"creators":["Fleisch, Daniel Alfred"],"institution":"Rice University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Natural Sciences","degree_department":null,"school":null,"contributors":[],"advisors":["Gordon, William E."],"committee_chairs":[],"committee_members":[],"year":1977,"date_issued":"1977","date_published":"1977","updated_at":"2026-07-24T04:10:39Z","subjects":[],"languages":["eng"],"rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1911/104100","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Gordon, William E."]},{"key":"dc:creator","label":"Author","values":["Fleisch, Daniel Alfred"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-12-18T21:17:25Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2018-12-18T21:17:25Z"]},{"key":"dc:date.issued","label":"Date","values":["1977"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Natural Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Rice University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author, unless otherwise indicated. 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The equipment and procedures used in previous experiments at the Jicamarca Radio Observatory are examined in detail, and are found to require modification in some cases. The theory of phased arrays is presented, and the correct and complete array factor pertinent to the Jicamarca antenna is derived. Information about the side lobes and precise positions of various beams is considered, and three beams are selected for use in a proposed stratospheric backscatter experiment. The phasing cables needed for the implementation of two off-vertical beams are available at the observatory, while new phasing cables must be manufactured for the realization of the vertical beam."]},{"key":"dc:title","label":"Title","values":["Stratospheric scattering of radio waves and the Jicamarca radio telescope"]}]}],"canonical_facts":{"dc:contributor.advisor":["Gordon, William E."],"dc:creator":["Fleisch, Daniel Alfred"],"dc:date.accessioned":["2018-12-18T21:17:25Z"],"dc:date.available":["2018-12-18T21:17:25Z"],"dc:date.issued":["1977"],"dc:description.abstract":["Radar backscatter from the 15 to 35 km height range provides information about the dynamics and turbulent mixing of the stratosphere. The 3-dimensional space spectrum of turbulent fluctuations, the mean wind velocity, and the root-mean-square velocity fluctuations are directly related to the autocorrelation function of the scattered signals. The theory and mechanisms of stratospheric scattering of radio waves is discussed. The equipment and procedures used in previous experiments at the Jicamarca Radio Observatory are examined in detail, and are found to require modification in some cases. The theory of phased arrays is presented, and the correct and complete array factor pertinent to the Jicamarca antenna is derived. Information about the side lobes and precise positions of various beams is considered, and three beams are selected for use in a proposed stratospheric backscatter experiment. The phasing cables needed for the implementation of two off-vertical beams are available at the observatory, while new phasing cables must be manufactured for the realization of the vertical beam."],"dc:identifier.uri":["https://hdl.handle.net/1911/104100"],"dc:language.iso":["eng"],"dc:rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"dc:title":["Stratospheric scattering of radio waves and the Jicamarca radio telescope"],"dc:type":["Thesis"],"thesis:degree_discipline":["Natural Sciences"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Rice University"]},"updated_at":"2026-07-24T04:10:39Z"}