Results 31 to 40 of about 1,808,593 (336)

Analysis of GPS P(Y) signal power enhancement based on the observations with a semi-codeless receiver

Satellite Navigation, 2022
The Global Position System (GPS) satellites of Block IIR-M and later versions can turn on the signal power enhancement if needed. In recent years, this power enhancement has been triggered several times when the U.S force was involved in local conflicts,
Xiaomei Tang, Muzi Yuan, Feixue Wang
doaj   +1 more source

On the Orbits of Infalling Satellite Halos [PDF]

, 2010
The orbital properties of infalling satellite halos set the initial conditions which control the subsequent evolution of subhalos and the galaxies that they host, with implications for mass stripping, star formation quenching, and merging.
Abadi, Andrew R. Wetzel, Angulo, Aubert, Bardeen, Barnes, Baugh, Benson, Biviano, Blumenthal, Bond, Boylan-Kolchin, Boylan-Kolchin, Colberg, Conroy, Cox, D'Onghia, D'Onghia, Davis, Dekel, Dekel, Dekel, Dubinski, Dunkley, Eisenstein, Faltenbacher, Faltenbacher, Gill, Gill, Gnedin, Gunn, Hausman, Herbert-Fort, Hopkins, Jiang, Kereš, Khochfar, Klypin, Kowalski, Kravtsov, Ludlow, McCarthy, Mo, Moore, Moore, Natarajan, Navarro, Ostriker, Percival, Reed, Sales, Sheth, Springel, Taylor, Toomre, Tormen, Tormen, van den Bosch, Vikhlinin, Vitvitska, Wang, Wang, Warren, Wetzel, Wetzel, Wetzel, Wetzel, White, White, White, Zel'Dovich, Zentner   +71 more
core   +1 more source

Refining the ERA5-based global model for vertical adjustment of zenith tropospheric delay

Satellite Navigation, 2022
Tropospheric delay is an important factor affecting high precision Global Navigation Satellite System (GNSS) positioning and also the basic data for GNSS atmospheric research.
Ge Zhu, Liangke Huang, Yunzhen Yang, Junyu Li, Lv Zhou, Lilong Liu   +5 more
doaj   +1 more source

Dynamical friction on satellite galaxies

, 2005
For a rigid model satellite, Chandrasekhar's dynamical friction formula describes the orbital evolution quite accurately, when the Coulomb logarithm is chosen appropriately.
Fujii, Michiko, Funato, Yoko, Makino, Junichiro   +2 more
core   +1 more source

Characterization of multi-scale ionospheric irregularities using ground-based and space-based GNSS observations

Satellite Navigation, 2021
Ionospheric irregularities can adversely affect the performance of Global Navigation Satellite System (GNSS). However, this opens the possibility of using GNSS as an effective ionospheric remote sensing tool.
YuXiang Peng, Wayne A Scales, Michael D Hartinger, Zhonghua Xu, Shane Coyle   +4 more
doaj   +1 more source

Culture conditions influence satellite cell activation and survival of single myofibers [PDF]

, 2018
Single myofiber isolation protocols allow to obtain an in vitro system in which the physical association between the myofiber and its stem cells, the satellite cells, is adequately preserved.
Adamo, Sergio, Benedetti, Anna, Bouche', Marina, Moresi, Viviana, Renzini, Alessandra, Silvestroni, Leopoldo   +5 more
core   +2 more sources

Experimental Demonstration of High-Security and Low-CSPR Single-Sideband Transmission System Based on 3D Lorenz Chaotic Encryption

Photonics
Broadcast-style downlinks (e.g., PONs and satellites) expose physical waveforms despite transport-layer cryptography, motivating physical-layer encryption (PLE).
Chao Yu, Angli Zhu, Hanqing Yu, Yuanfeng Li, Mu Yang, Peijin Hu, Haoran Zhang, Xuan Chen, Hao Qi, Deqian Wang, Yiang Qin, Xiangning Zhong, Dong Zhao, Yue Liu   +13 more
doaj   +1 more source

A joint InSAR-GNSS workflow for correction and selection of interferograms to estimate high-resolution interseismic deformations

Satellite Navigation, 2023
Knowledge of the spatial distribution of interseismic deformations is essential to better understand earthquake cycles. The existing methods for improving the reliability of the obtained deformations often rely on visual inspection and prior model ...
Hongzhi Liu, Lei Xie, Guoqiang Zhao, Eslam Ali, Wenbin Xu   +4 more
doaj   +1 more source

Assessment of tomographic window and sampling rate effects on GNSS water vapor tomography

Satellite Navigation, 2023
The ground-based Global Navigation Satellite System (GNSS) water vapor tomography is increasingly important in GNSS meteorology. As the multi-GNSS and more ground-based GNSS sites can be incorporated into the regional water vapor tomographic model ...
Fei Yang, Yilin Sun, Xiaolin Meng, Jiming Guo, Xu Gong   +4 more
doaj   +1 more source

The Planes of Satellite Galaxies Problem, Suggested Solutions, and Open Questions

, 2018
Satellite galaxies of the Milky Way and of the Andromeda galaxy have been found to preferentially align in significantly flattened planes of satellite galaxies, and available velocity measurements are indicative of a preference of satellites in those ...
Pawlowski, Marcel S.
core   +1 more source