Results 41 to 50 of about 143,499 (172)

Neighbourhood-aware counter-based broadcast scheme for wireless ad hoc networks [PDF]

, 2008
Broadcasting is a vital operation in mobile ad hoc networks (MANETs) and it is crucial to enhance its efficiency to ensure successful deployment. Although flooding is ideal for broadcast operations due to its simplicity and high reachability it ...
Jamaldeen Abdulai, Jamaldeen, A., Sarah Omar al-Humoud, Lewis M. Mackenzie, Mackenzie, L.M., al-Humoud, S.O.   +5 more
core   +1 more source

The Holland broadcast language [PDF]

, 2006
The broadcast language is a programming formalism devised by Holland in 1975, which aims at allowing Genetic Algorithms (GAs) to use an adaptable representation. A GA may provide an efficient method for adaption but still depends on the efficiency of the
Decraene, James
core   +3 more sources

Empirical Assessment of Storm‐Time Thermospheric Density Inversion Methods From LEO POD Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Thermospheric mass density is one of the largest sources of operational uncertainty for spacecraft in low Earth orbit, particularly during geomagnetic storms. The growing population of Global Navigation Satellite System‐equipped satellites presents a data set of opportunity: precise orbit determination (POD) data streams can be used to ...
Charles Constant, Indigo Brownhall, Anasuya Aruliah, Marek Ziebart, Santosh Bhattarai   +4 more
wiley   +1 more source

LOBEFIT: LEO satellite broadcast ephemeris fitting open-source software based on automatic differentiation technique

SoftwareX
LEO (Low Earth Orbit)-based PNT (Positioning, Navigation and Timing) has become a research topic of much interest and a focus of development. As LEO satellites for PNT are expected to independently provide space-time references in the future, similar to ...
Zhao Xi, Yu Baoguo, Luo Bin
doaj   +1 more source

High‐Latitude GPS Position Error During Substorms

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Substorms produce rapid fluctuations in Global Navigation Satellite System (GNSS) signals, leading to degraded positioning performance at high latitudes. This study investigates the correlation of auroral structures on Global Positioning System (GPS) Precise Point Positioning (PPP) error during three substorm events with different strengths ...
Weixuan Liao, Yukitoshi Nishimura, Waqar Younas, Wen Li, Keith M. Groves, Eric F. Donovan, Vassilis Angelopoulos   +6 more
wiley   +1 more source

Refinement of a Framework for Moving Aircraft River Velocimetry (MARV) and Application to Particle Tracking Along Alaskan Rivers

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Information on river velocities enhances understanding flood hazards, evaluating habitat conditions, and predicting the transport of floating materials. In this follow‐up study, we used data from two new sites, one with a more complex morphology and the other with a lower suspended sediment concentration, to provide further evidence that ...
Carl J. Legleiter, Paul J. Kinzel, Mark Laker, Jeffrey S. Conaway   +3 more
wiley   +1 more source

A Robust Autonomous Timekeeping Scheme For Navigation Constellations Using Inter‐Satellite Links

Electronics Letters, Volume 62, Issue 1, January/December 2026.
This letter proposes a robust autonomous timekeeping scheme for navigation constellations that utilises inter‐satellite link measurements to mitigate on‐orbit clock anomalies. By cross‐evaluating clock stability between two independent ensemble groups and dynamically optimising their weights via particle swarm optimisation, the method effectively ...
Lihao Yin, Mingyuan Zhang, Qianyi Ren, Wenbin Gong   +3 more
wiley   +1 more source

Research on the Autonomous Orbit Determination of Beidou-3 Assisted by Satellite Laser Ranging Technology

Remote Sensing
The Beidou Global System (BDS-3) innovatively achieves autonomous navigation using inter-satellite links (ISL) across the entire constellation, but it still faces challenges such as the limitations of the prior constraint orbital accuracy and the overall
Wei Xiao, Zhengcheng Wu, Zongnan Li, Lei Fan, Shiwei Guo, Yilun Chen   +5 more
doaj   +1 more source

Estimation of Ionospheric Delay and Differential Code Bias Based on Regionally Distributed Reference Stations

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This paper proposes an efficient method to estimate regional ionospheric map and differential code biases simultaneously. Compared to the conventional research works, the proposed methodology is advantageous since it does not require any external aiding information and relies solely on information from basic CORSs (Continuously Operated Reference ...
Hyung Keun Lee, Jeongrae Kim, Kwan‐Dong Park, Byung‐Kyu Choi, Moon Beom Heo   +4 more
wiley   +1 more source

Ephemerides of Visual Binaries of highly eccentric orbits [PDF]

, 2013
Ephemerides of binary stars are important information for astronomical observation and research. In this paper, ephemerides of the visual binaries ADS784, ADS13665, A1529, ADS836, ADS 3434, ADS1105 and ADS 3315 have been calculated using a computational ...
Elsanhoury, Waleed, H., W., W. H., Waleed Elsanhoury   +3 more
core   +1 more source