{"id":122,"date":"2018-08-06T14:30:40","date_gmt":"2018-08-06T18:30:40","guid":{"rendered":"http:\/\/www.bu.edu\/csp\/?post_type=profile&#038;p=122"},"modified":"2021-07-13T09:58:10","modified_gmt":"2021-07-13T13:58:10","slug":"josh-semeter","status":"publish","type":"profile","link":"https:\/\/www.bu.edu\/csp\/profiles\/josh-semeter\/","title":{"rendered":"Joshua Semeter"},"content":{"rendered":"<p><strong>Research Interests:<\/strong> <em>Ionospheric and space-plasma physics; radar signal processing; spectroscopy of atmospheric airglow and aurora; optical sensors; image reconstruction and tomography<\/em><\/p>\n<p><strong>Website<\/strong><span>:\u00a0<\/span><a target=\"_blank\" href=\"http:\/\/people.bu.edu\/jls\" rel=\"noopener noreferrer\">http:\/\/people.bu.edu\/jls<\/a><\/p>\n<p class=\"paragraph_style_2\">Dr. Semeter\u2019s research concerns interactions between the Earth\u2019s ionized outer atmosphere (the ionosphere) and the space environment.\u00a0\u00a0 One manifestation is the aurora-borealis, produced by the release of electromagnetic energy stored in the distant magnetosphere.\u00a0\u00a0 The ionosphere is electrically conducting, and so it absorbs, refracts, and modulates radio waves.\u00a0 Understanding these effects is essential for the design and operation of global navigation (GPS) and communication systems.\u00a0 Electric currents flowing in the ionosphere also affects terrestrial technologies, such as power grids and pipelines, via induction.\u00a0 Ionospheres are inherent to all stellar-planetary systems, and their connection with the absorption of ionizing radiation suggests a fundamental connection with the evolution of habitable environments in the universe.<\/p>\n<p class=\"paragraph_style_2\">Activities in Dr. Semeter\u2019s lab include the development of optical and magnetic sensor technologies, radar experiment design and signal processing (with focus on incoherent scatter radar), and the application of tomographic and other inversion techniques to the analysis of distributed, multi-mode measurements of the space environment.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"author":9387,"template":"","_links":{"self":[{"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/profile\/122"}],"collection":[{"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/profile"}],"about":[{"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/types\/profile"}],"author":[{"embeddable":true,"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/users\/9387"}],"version-history":[{"count":7,"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/profile\/122\/revisions"}],"predecessor-version":[{"id":2493,"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/profile\/122\/revisions\/2493"}],"wp:attachment":[{"href":"https:\/\/www.bu.edu\/csp\/wp-json\/wp\/v2\/media?parent=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}