{"id":57194,"date":"2026-03-16T13:17:19","date_gmt":"2026-03-16T12:17:19","guid":{"rendered":"https:\/\/www.nae.fr\/2026\/03\/16\/detection-of-gnss-interference-using-reflected-signal-observations-from-the-leo-satellite-constellation\/"},"modified":"2026-03-16T13:17:19","modified_gmt":"2026-03-16T12:17:19","slug":"detection-of-gnss-interference-using-reflected-signal-observations-from-the-leo-satellite-constellation","status":"publish","type":"post","link":"https:\/\/www.nae.fr\/en\/2026\/03\/16\/detection-of-gnss-interference-using-reflected-signal-observations-from-the-leo-satellite-constellation\/","title":{"rendered":"Detection of GNSS Interference Using Reflected Signal Observations from the LEO Satellite Constellation"},"content":{"rendered":"
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\n\nRadio Frequency Interference (RFI) is a growing concern for Global Navigation Satellite System (GNSS) reliability. The Cyclone GNSS (CYGNSS) constellation, designed for ocean wind retrieval via GNSS reflectometry (GNSS-R), provides Delay-Doppler Maps (DDMs) with noise floor metrics exploitable for spaceborne RFI detection. This study proposes a maximum-based DDM noise floor strategy that selects the highest noise floor value among four simultaneous GNSS reflections at each 0.5-second epoch, rather than their mean, preventing dilution of anomalous signals by unaffected channels. To suppress false alarms, a two-tier verification framework is introduced: (1) multi-satellite concurrent detection, confirming RFI when two or more CYGNSS satellites independently flag the same geographic region, and (2) temporal persistence verification, confirming a single-satellite detection only if threshold exceedance persists over a 10-second window. The physical basis for this criterion is established through slant-range geometry analysis between a ground-based jammer and the orbiting satellite.\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/blockquote>\n
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\n\nPour en savoir plus : Detection of GNSS Interference Using Reflected Signal Observations from the LEO Satellite Constellation<\/a>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Radio Frequency Interference (RFI) is a growing concern for Global Navigation Satellite System (GNSS) reliability. The Cyclone GNSS (CYGNSS) constellation, designed for ocean wind retrieval via GNSS reflectometry (GNSS-R), provides Delay-Doppler Maps (DDMs) with noise floor metrics exploitable for spaceborne RFI detection. This study proposes a maximum-based DDM noise floor strategy that selects the highest […]<\/p>\n","protected":false},"author":1,"featured_media":56493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24,16],"tags":[35],"class_list":["post-57194","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite-spatial","category-rti","tag-actualites"],"acf":[],"yoast_head":"\nDetection of GNSS Interference Using Reflected Signal Observations from the LEO Satellite Constellation - NAE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.nae.fr\/en\/2026\/03\/16\/detection-of-gnss-interference-using-reflected-signal-observations-from-the-leo-satellite-constellation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Detection of GNSS Interference Using Reflected Signal Observations from the LEO Satellite Constellation - NAE\" \/>\n<meta property=\"og:description\" content=\"Radio Frequency Interference (RFI) is a growing concern for Global Navigation Satellite System (GNSS) reliability. The Cyclone GNSS (CYGNSS) constellation, designed for ocean wind retrieval via GNSS reflectometry (GNSS-R), provides Delay-Doppler Maps (DDMs) with noise floor metrics exploitable for spaceborne RFI detection. 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