Results 191 to 200 of about 13,063 (249)

Lightning-induced relativistic electron precipitation from the inner radiation belt. [PDF]

Nat Commun
Feinland M, Blum LW, Marshall RA, Gan L, Shumko M, Looper M.   +5 more
europepmc   +1 more source

Navigating latency hurdles: an in-depth examination of a cloud-powered GNSS real-time positioning application on mobile devices. [PDF]

Sci Rep
Hernández Olcina J, Anquela Julián AB, Martín Furones ÁE.   +2 more
europepmc   +1 more source

Adaptive Resource Optimization for LoRa-Enabled LEO Satellite IoT System in High-Dynamic Environments. [PDF]

Sensors (Basel)
Zhang C, Peng H, Ji Y, Hong T, Zhang G.
europepmc   +1 more source

Ephemeris of comet 1892a

The Astronomical Journal, 1892
openaire   +1 more source

A Study on Graph Optimization Method for GNSS/IMU Integrated Navigation System Based on Virtual Constraints. [PDF]

Sensors (Basel)
Qiu H, Zhao Y, Wang H, Wang L.
europepmc   +1 more source

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Ephemeris Error Modeling in Opportunistic LEO Satellite Tracking with Pseudorange and Doppler Measurements

Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), 2023
A framework for tracking the ephemerides of low Earth orbit (LEO) satellites is presented. This framework considers a known receiver that tracks the position and velocity states of LEO satellites using pseudorange or Doppler measurements extracted ...
S. Hayek, Joe Saroufim, Z. M. Kassas
semanticscholar   +1 more source

Satellite Ephemeris Broadcasting Architecture for 5G Integrated LEO Satellite Internet

International Conference on Speech Technology and Human-Computer Dialogue, 2022
This paper proposes a satellite ephemeris broadcasting architecture for 5G integrated low earth orbit (LEO) Satellite Internet based on two-line element (TLE) ephemeris. By periodically broadcasting the TLE ephemeris, which can be used to assist the user
Jianwei Li, Dongdong Wang, Lizhe Liu, Bin Wang, Chenhua Sun   +4 more
semanticscholar   +1 more source

Eclipse-Conscious Transfer to Lunar Gateway Using Ephemeris-Driven Terminal Coast Arcs

Journal of Guidance Control and Dynamics, 2021
A novel methodology is proposed for designing low-thrust trajectories to quasi-periodic, near-rectilinear Halo orbits that leverages ephemeris-driven, “invariant manifold analogs” as long-duration ...
Sandeep K. Singh, J. Junkins, B. Anderson, E. Taheri   +3 more
semanticscholar   +1 more source

Ephemeris Closed-Loop Tracking of LEO Satellites with Pseudorange and Doppler Measurements

Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021), 2021
A framework for refining the ephemerides of low Earth orbit (LEO) space vehicles (SVs) is presented. This framework is based on a known receiver that tracks the LEO SVs using pseudorange and Doppler measurements extracted from the LEO SVs’ signals.
Nadim Khairallah, Z. Kassas
semanticscholar   +1 more source