{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T14:46:23Z","timestamp":1773845183508,"version":"3.50.1"},"reference-count":21,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2023,7,21]],"date-time":"2023-07-21T00:00:00Z","timestamp":1689897600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Space Agency (ESA)","award":["4000108671\/13\/D\/MRP"],"award-info":[{"award-number":["4000108671\/13\/D\/MRP"]}]},{"name":"European Space Agency (ESA)","award":["SSA P3-SST-IV-CHEIA PHASE 1"],"award-info":[{"award-number":["SSA P3-SST-IV-CHEIA PHASE 1"]}]},{"name":"European Space Agency (ESA)","award":["SSA P3-SST-V-CHEIA PHASE 2"],"award-info":[{"award-number":["SSA P3-SST-V-CHEIA PHASE 2"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>This paper describes the work for the radar signal processor, the core of the Cheia space surveillance radar. It presents the basic operation, the requirements and the achieved processing performance together with a description of optimizations both in terms of signal-to-noise ratio and in terms of software processing. The Cheia Radar is financed by the European Space Agency and will be used for the tracking of low Earth orbit objects and for refining the international catalogs of space objects.<\/jats:p>","DOI":"10.3390\/rs15143630","type":"journal-article","created":{"date-parts":[[2023,7,24]],"date-time":"2023-07-24T01:12:28Z","timestamp":1690161148000},"page":"3630","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Radar Signal Processor of the First Romanian Space Surveillance Radar"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7111-6324","authenticated-orcid":false,"given":"C\u0103lin","family":"B\u00eer\u0103","sequence":"first","affiliation":[{"name":"Faculty of Electronics, Telecommunications and Information Technology, Politehnica University of Bucharest, 060042 Bucharest, Romania"}]},{"given":"Liviu","family":"Ionescu","sequence":"additional","affiliation":[{"name":"RARTEL S.A., 011041 Bucharest, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3242-3561","authenticated-orcid":false,"given":"Alexandru","family":"Rusu-Casandra","sequence":"additional","affiliation":[{"name":"Faculty of Electronics, Telecommunications and Information Technology, Politehnica University of Bucharest, 060042 Bucharest, Romania"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,21]]},"reference":[{"key":"ref_1","unstructured":"EUSST Consortium (2022, July 02). ESA Safeguarding European Space Infrastructure. Available online: https:\/\/www.eusst.eu\/about-us\/."},{"key":"ref_2","unstructured":"(2023, February 02). Societatea Na\u0163ional\u0103 de Radiocomunica\u0163ii S.A. (RADIOCOM), Centrul de Comunica\u0163ii Prin Satelit CHEIA. Available online: https:\/\/www.radiocom.ro\/Materiale\/Cheia\/Centrul%20de%20Comunicatii%20prin%20Satelit%20CHEIA.pdf."},{"key":"ref_3","unstructured":"Ionescu, I., Scagnoli, R., Istriteanu, D., and Turcu, V. (2019, January 22\u201324). Cheia Antennas Retrofit to a Space Tracking Radar. Proceedings of the European Space Agency 1st NEO and Debris Detection Conference NEOSST1, Darmstadt, Germany. Available online: https:\/\/conference.sdo.esoc.esa.int\/proceedings\/neosst1\/paper\/415\/NEOSST1-paper415.pdf."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Schirru, L., Pisanu, T., and Podda, A. (2021). 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