Results 11 to 20 of about 5,140 (182)
Development of Comprehensive PNT and Resilient PNT [PDF]
Journal of Geodesy and Geoinformation Science, 2023 Any single Positioning, Navigation and Timing (PNT) technology has its vulnerability and limits, even the powerful Global Navigation Satellite System (GNSS) is no exception.
Xia REN, Yuanxi YANG
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IEEE Access, 2022 More and more satellites are populating the sky nowadays in the Low Earth orbits (LEO). Most of the targeted applications are related to broadband and narrowband communications, Earth observation, synthetic aperture radar, and internet-of-Things (IoT ...
F. S. Prol +18 more
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Resilient PNT Concept Frame [PDF]
Journal of Geodesy and Geoinformation Science, 2019 The concept of resilient positioning, navigation and timing (PNT) is described. The definition of resilient PNT is given, the relationship between integrated (or comprehensive) PNT and resilient PNT is analyzed, and it is pointed out that the integrated ...
Yuanxi YANG
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On PNT equivalences for Beurling numbers [PDF]
Monatshefte Fur Mathematik, 2016 In classical prime number theory several asymptotic relations are considered to be "equivalent" to the prime number theorem. In the setting of Beurling generalized numbers, this may no longer be the case. Under additional hypotheses on the generalized integer counting function, one can however still deduce various equivalences between the Beurling ...
Gregory Debruyne +2 more
exaly +5 more sources
ETS transcription factor pointed controls germline survival in Drosophila. [PDF]
PLoS GeneticsProper gonad development is a pre-requisite for gametogenesis and reproduction. During female gonad formation in Drosophila, the EGF receptor (EGFR) signalling pathway ensures the correct number of primordial germ cells (PGCs) populate the larval gonad ...
Alicia E Rosales-Nieves +4 more
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METTL3 inhibits primed-to-naïve transition of pluripotent stem cells through m6A-YTHDF2-pluripotency/Gstp1 mRNA degradation axis [PDF]
Cell RegenerationN6-methyladenosine (m6A) plays crucial roles in development and cellular reprogramming. During embryonic development, pluripotency transitions from a naïve to a primed state, and modeling the reverse primed-to-naïve transition (PNT) provides a valuable ...
Sa Li +13 more
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Pentostatin Biosynthesis Pathway Elucidation and Its Application
Fermentation, 2022 Pentostatin (PNT), a nucleoside antibiotic with a 1,3-diazo ring structure, is distributed in several actinomycetes and fungi species. Its special structure makes PNT possess a wide spectrum of biological and pharmacological properties, such as ...
Hongyu Zhang +4 more
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Sensors, 2020 Global Navigation Satellite System (GNSS) meaconing and spoofing are being considered as the key threats to the Safety-of-Life (SoL) applications that mostly rely upon the use of open service (OS) signals without signal or data-level protection. While a
Silvio Semanjski +3 more
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Fault-Free Protection Level Equation for CLAS PPP-RTK and Experimental Evaluations
Sensors, 2022 Centimeter level augmentation system (CLAS) of the quasi-zenith satellite system (QZSS) is the first precise point positioning-real time kinematic (PPP-RTK) augmentation system of the global navigation satellite system (GNSS), which is currently ...
Euiho Kim +6 more
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Analysis of Baseband Algorithms for LEO PNT
ENC 2023, 2023 This paper provides an analysis of the impact of transmitter dynamics on baseband algorithms for position, navigation and timing applications using a low Earth orbit constellation. In particular, the acquisition and tracking of signals with high dynamics have larger Doppler and Doppler drift values that might impair the use of standard methods.
Fran Fabra +2 more
openaire +5 more sources