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eess.SP2026
Earth-baseline VLBI restores the observability of a lunar surface station in joint orbit-and-clock determination
Chakshu Baweja
Lunar positioning, navigation, and timing (PNT) is moving from concept to hardware, ESA's Moonlight/LCNS, NovaMoon reference stations, LunaNet, and Coordinated Lunar Time, all redu…
eess.SP2026
A Conditional Timing Protection Level: Holdover-Limited Undetected Time Error Under GNSS Spoofing
Chakshu Baweja
A GNSS timing receiver under spoofing has no nominal-geometry fault for position-domain RAIM to bound: the threat is a slow, common-mode pull of served clock time that the receiver…
eess.SP2026
Anticipating the Optimism Gap: Predicting Distribution-Shift Degradation of RF-Impairment Detectors from In-Distribution Statistics
Chakshu Baweja
Detectors for GNSS radio-frequency impairments (jamming, spoofing, multipath) are usually reported with a single AUC measured on the distribution they were tuned on. That number fa…