Results 161 to 170 of about 1,122,620 (213)

A Novel Approach for Kalman Filter Tuning for Direct and Indirect Inertial Navigation System/Global Navigation Satellite System Integration. [PDF]

Sensors (Basel)
Tavares AJA, Oliveira NMF.
europepmc   +1 more source

Hijri Month Determination in Southeast Asia: An Illustration Between Religion, Science, and Cultural Background. [PDF]

Heliyon
Mohd Nawawi MSA, Faid MS, Saadon MHM, Wahab RA, Ahmad N.   +4 more
europepmc   +1 more source

Combining semiparametric and machine learning approaches for short-term prediction of satellite clock bias. [PDF]

Sci Rep
Jin L, Zhao W, Pan X, Ai Q, Cai M, Ruan X.   +5 more
europepmc   +1 more source

Intelligent algorithmic framework for detection and mitigation of BeiDou spoofing attacks in vehicular ad hoc networks (VANETs). [PDF]

PeerJ Comput Sci
Tariq U.
europepmc   +1 more source

A Study of Outliers in GNSS Clock Products. [PDF]

Sensors (Basel)
Maciuk K, Varna I, Krzykowska-Piotrowska K.   +2 more
europepmc   +1 more source

An ultra-short-period super-Earth with an extremely high density and an outer companion. [PDF]

Sci Rep
Livingston JH, Gandolfi D, Trani AA, Herath M, Barragán O, Hatzes A, Luque R, Fukui A, Nowak G, Palle E, Hellier C, Fridlund M, de Leon J, Hirano T, Narita N, Albrecht S, Dai F, Deeg H, Van Eylen V, Korth J, Tamura M.   +20 more
europepmc   +1 more source

Multiwavelength constraints on the origin of a nearby repeating fast radio burst source in a globular cluster. [PDF]

Nat Astron
Pearlman AB, Scholz P, Bethapudi S, Hessels JWT, Kaspi VM, Kirsten F, Nimmo K, Spitler LG, Fonseca E, Meyers BW, Stairs IH, Tan CM, Bhardwaj M, Chatterjee S, Cook AM, Curtin AP, Dong FA, Eftekhari T, Gaensler BM, Güver T, Kaczmarek J, Leung C, Masui KW, Michilli D, Prince TA, Sand KR, Shin K, Smith KM, Tendulkar SP.   +28 more
europepmc   +1 more source

Ephemeris and Timing Error Disambiguation Enabling Precise LEO PNT

IEEE Transactions on Aerospace and Electronic Systems
— The ephemeris and timing errors of low Earth orbit (LEO) satellites are modeled, leading to an approach to disambiguate these errors from pseudorange-type measurements.
Joe Saroufim, Zaher M. Kassas
semanticscholar   +3 more sources

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Comparing the Timescales in Public, Precise Ephemeris Products

The Precise Time and Time Interval Systems and Applications Meeting, 2021
Given the importance of GPS multiple organizations regularly process satellite position and clock data to create publicly available, precise ephemeris products. Underlying each product is a timescale that describes the satellite clock biases.
William Konyk
semanticscholar   +3 more sources

Precise Ephemeris Reconstruction Using the Clohessy-Wiltshire Frame and Multiple Sequential Compressions

Journal of Guidance, Control, and Dynamics, 2003
A precise onboard ephemeris propagation method that uses a multiple sequential compression is developed. A least-square regression is used to dee ne the reference orbit in the form of polynomial functions. Then the position and velocity residuals in terms of rectangular coordinates are generated by subtracting the reference orbit from a numerically ...
Deok Jin Lee, Tae Soo No, Seok-Woo Choi, Sang-Ryul Lee, Hak-Jung Kim, Kyle T. Alfriend   +5 more
openalex   +3 more sources