{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T18:26:58Z","timestamp":1773512818795,"version":"3.50.1"},"reference-count":19,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2019,5,27]],"date-time":"2019-05-27T00:00:00Z","timestamp":1558915200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004225","name":"Petrobras","doi-asserted-by":"publisher","award":["PT-136.01.12512"],"award-info":[{"award-number":["PT-136.01.12512"]}],"id":[{"id":"10.13039\/501100004225","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004225","name":"Petrobras","doi-asserted-by":"publisher","award":["PT-151.01.12842"],"award-info":[{"award-number":["PT-151.01.12842"]}],"id":[{"id":"10.13039\/501100004225","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>A novel system to monitor methane fugitive emissions was developed using passive optical sensors to attend to the natural gas production and transportation industry. The system is based on optical time domain reflectometry and direct optical absorption spectroscopy. The system was tested in a gas compressor station for four months. The system was capable to measure methane concentration at two points showing its correlation with meteorological data, specially wind velocity and local temperature. Methane concentrations varied from 2.5% to 15% in the first monitored point by sensor 1, and from 5% to 30%, in the second point with sensor 2. Both sensors exhibited a moderate negative correlation with wind velocity with a mean Pearson coefficient of \u22120.61, despite the external cap designed to avoid the influence of wind. Sensor 2 had a modification to its external package that reduced this mean correlation coefficient to \u22120.30, considered to be weak to negligible. Regarding temperature, a moderate mean correlation of \u22120.59 was verified for sensor 1 and zero mean correlation was found for sensor 2. Based on these results the system was proven to be robust for installation in gas transportation or processing facilities.<\/jats:p>","DOI":"10.3390\/rs11101249","type":"journal-article","created":{"date-parts":[[2019,5,27]],"date-time":"2019-05-27T11:19:27Z","timestamp":1558955967000},"page":"1249","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Evaluation of Environmental Influences on a Multi-Point Optical Fiber Methane Leak Monitoring System"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8339-6001","authenticated-orcid":false,"given":"Claudio","family":"Floridia","sequence":"first","affiliation":[{"name":"CPqD Research and Development Center, Campinas - SP 13086-902, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8648-957X","authenticated-orcid":false,"given":"Joao Batista","family":"Rosolem","sequence":"additional","affiliation":[{"name":"CPqD Research and Development Center, Campinas - SP 13086-902, Brazil"}]},{"given":"Jo\u00e3o Paulo Vicentini","family":"Fracarolli","sequence":"additional","affiliation":[{"name":"CPqD Research and Development Center, Campinas - SP 13086-902, Brazil"}]},{"given":"F\u00e1bio Renato","family":"Bassan","sequence":"additional","affiliation":[{"name":"CPqD Research and Development Center, Campinas - SP 13086-902, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4197-0164","authenticated-orcid":false,"given":"Rivael Strobel","family":"Penze","sequence":"additional","affiliation":[{"name":"CPqD Research and Development Center, Campinas - SP 13086-902, Brazil"}]},{"given":"Larissa Maria","family":"Pereira","sequence":"additional","affiliation":[{"name":"CENPES Petrobras Research and Development Center, Rio de Janeiro - RJ 21941-915, Brazil"}]},{"given":"Maria Ang\u00e9lica Carmona","family":"da Motta Resende","sequence":"additional","affiliation":[{"name":"CENPES Petrobras Research and Development Center, Rio de Janeiro - RJ 21941-915, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2019,5,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Yamate, T. 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