Results 61 to 70 of about 868,877 (296)

GPS Radio Occultation: Results from CHAMP, GRACE and FORMOSAT-3/COSMIC

Terrestrial, Atmospheric and Oceanic Sciences, 2009
The Taiwan/US FORMOSAT-3/COSMIC (FORMOsa SATellite mission - 3/Constellation Observing System for Meteorology, Ionosphere and Climate) satellite nstellation was successfully launched on 14 April 2006. It is expected to leverage the use of the GPS (Global
Jens Wickert, Grzegorz Michalak, Torsten Schmidt, Georg Beyerle, Chio-Zong Cheng, Sean B. Healy, Stefan Heise, Cheng-Yung Huang, Norbert Jakowski, Wolfgang Kohler, Christoph Mayer, Dave Offiler, Eiji Ozawa, Alexander G. Pavelyev, Markus Rothacher, Byron Tapley, Christina Arras   +16 more
doaj   +1 more source

A NOVEL PROPOSAL OF GAOFEN-3 SATELLITE CONSTELLATION FOR MULTI-APPLICATIONS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Gaofen-3 is the first C-band fully polarimetric SAR satellite in China, which is widely used in various fields such as ocean monitoring, disaster reduction and so on. In this paper, a new satellite constellation is proposed based on the orbit of Gaofen-3
X. Qiu, X. Qiu, X. Qiu, C. Ding, C. Ding, C. Ding, B. Lei, B. Lei, B. Han, B. Han, F. Li, F. Li   +11 more
doaj   +1 more source

Satellite-enabled LTE systems in LEO constellations [PDF]

2017 IEEE International Conference on Communications Workshops (ICC Workshops), 2017
LTE-based satellite systems in LEO constellations are a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure. However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges to a traditional LTE system.
Alessandro Guidotti, Alessandro Vanelli-Coralli, Màrius Caus, Joan Bas, Giulio Colavolpe, Tommaso Foggi, Stefano Cioni, Andrea Modenini, Daniele Tarchi   +8 more
openaire   +6 more sources

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

Satellite Constellation Networks [PDF]

, 2003
This is one of the first books to be focused on the internetworking and computing aspect of satellite networks.
openaire   +2 more sources

Ambient‐Stable Transparent P‐Type CuI Transistors Via Room‐Temperature Pulsed Laser Deposition

Advanced Functional Materials, EarlyView.
An in situ PLD fabricated AlOx${\rm AlO}_x$/CuI/AlOx${\rm AlO}_x$ sandwich structure enables stable CuI TFTs with a field‐effect mobility of 2.3 ±$\pm$ 0.7 cm2${\rm cm}^{2}$ V−1${\rm V}^{-1}$ s−1${\rm s}^{-1}$ and excellent ambient stability. Complementary inverters based on CuI:Rb and ZnO:Al exhibit rail‐to‐rail voltage transfer characteristics and an
Yang Chen, Susanne Selle, Michael S. Bar, Michael Lorenz, Holger von Wenckstern, Marius Grundmann   +5 more
wiley   +1 more source

Analysis on the coverage performance and networking scheme of an MEO constellation

Dianxin kexue, 2022
Geostationary earth orbit (GEO) satellite orbit position resources have been scarce for a long time.The development of giant low-orbit satellite constellations has made the low-orbit resources unprecedentedly scarce.As a compromise between GEO and low ...
Yanbin ZHAO, Renning WANG, Peipei HU
doaj   +2 more sources

Semiconducting Polymers Post‐Functionalized With Ureido‐Pyrimidinone for Robust Stretchable Transistors

Advanced Functional Materials, EarlyView.
The design of intrinsically robust stretchable semiconducting polymers was achieved through OTBS‐mediated post‐functionalization of PDPP2T side chains with UPy units, generating dual hydrogen‐bonding motifs comprising weaker urethane linkages and strong quadruple UPy interactions along the long alkyl side chain, which is crucial for achieving desirable
Dinda Bazliah, Livy Laysandra, Kosuke Terayama, Xingyu Yang, Atsushi Isobe, Tai‐Chin Chiang, Tsuyoshi Michinobu, Yu‐Cheng Chiu   +7 more
wiley   +1 more source

Development conception of space-ground inteyrated information network LEO mobile and broadband internet constellation

Dianxin kexue, 2017
With the extension of global internet and IoT (internet of things),LEO (low earth orbit) communication constellation which can achieve seamless coverage of the world including the two poles once again meets the opportunity for development.An innovative ...
Chenhua SUN, Yongwei XIAO, Weisong ZHAO, Po ZHOU   +3 more
doaj   +2 more sources

Get the MOST Out of LEO Satellite Constellations Topology Design

IEEE Open Journal of the Communications Society
As Low-Earth Orbit (LEO) satellite deployments scale to thousands of nodes, the design of satellite network topologies becomes increasingly complex yet critical for achieving the desired performance. Since each LEO satellite can only provide service to a
Robert Esswein, Quincy Bayer, Samuel Mergendahl, Mai Abdelhakim, Robert K. Cunningham   +4 more
doaj   +1 more source