Results 71 to 80 of about 44,451 (275)

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

Aerospace
In recent years, the number of expected missions to the Moon has increased significantly. With limited terrestrial-based infrastructure to support this number of missions, as well as restricted visibility over intended mission areas, there is a need for ...
Joshua J. R. Critchley-Marrows, Xiaofeng Wu, Yosuke Kawabata, Shinichi Nakasuka   +3 more
doaj   +1 more source

Modulation and coding technology for deep space and satellite applications [PDF]

Modulation and coding research and development at the Jet Propulsion Laboratory (JPL) currently emphasize Deep Space Communications Systems and advanced near earth Commercial Satellite Communications Systems.
Rafferty, W., Yuen, J. H.
core   +1 more source

STE-QUEST Mission and System Design - Overview after completion of Phase-A

, 2014
STE-QUEST is a fundamental science mission which is considered for launch within the Cosmic Vision programme of the European Space Agency (ESA). Its main scientific objectives relate to probing various aspects of Einstein's theory of general relativity ...
Beck, Jan, Hechenblaikner, Gerald, Hess, Marc-Peter, Vitelli, Marianna   +3 more
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Analysis of Beam Walk in Inter-Satellite Laser Link: Implications for Differential Wavefront Sensing in Gravitational Wave Detection

Applied Sciences
Achieving space-based gravitational wave detection requires the establishment of an interferometer constellation. It is necessary to establish and maintain stable laser interferometric links using the differential wavefront sensing (DWS) technnique. When
Xing-Guang Qian, Zhao Cui, Hao-Qi Shi, Xue Wang, Wei-Lai Yao, Rui-Hong Gao, Yi-Kun Wang   +6 more
doaj   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

Inter-Satellite Link Optimization of Two Collocated Geostationary Satellites

IEEE Access
With the growing number of geostationary satellites and the limited availability of orbital slots, satellite operators increasingly collocate multiple satellites within the same slot, necessitating coordination through inter-satellite links (ISL).
Fatemeh Amozegay, Amirreza Kosari, Amir Labibian   +2 more
doaj   +1 more source

Space-based Aperture Array For Ultra-Long Wavelength Radio Astronomy

, 2015
The past decade has seen the rise of various radio astronomy arrays, particularly for low-frequency observations below 100MHz. These developments have been primarily driven by interesting and fundamental scientific questions, such as studying the dark ...
Arts, Michel, Belien, Frederik, Bentum, Mark, Boonstra, Albert-Jan, Klein-Wolt, Marc, Rajan, Raj Thilak, Saks, Noah, van der Veen, Alle-Jan   +7 more
core   +1 more source

Stoichiometry‐Programmed MXenes via Precursor Engineering for High‐Performance EMI Shielding and Energy Storage

Advanced Materials, EarlyView.
Precursor carbon stoichiometry programs internal strain and oxygen substitution in Ti3AlCxO2‐x, deterministically switching Ti3CxO2‐xTz MXenes between highly aligned 2D nanosheets and spontaneous 1D nanoscrolls. This synthesis‐stage architecture control enables ultrathin X/W‐band EMI shielding with outstanding mass‐normalized performance and bending ...
Jaeeun Park, Ju‐Hyoung Han, Yujin Chae, Mincheal Kim, Juwon Han, Younggeun Jang, Young Ho Jin, Jaewon Wang, Shi‐Hyun Seok, Yeoseon Sim, Zonghoon Lee, EunMi Choi, Soon‐Yong Kwon   +12 more
wiley   +1 more source

Hybrid Deep Learning-Based Adaptive Modulation for Free Space Optical (FSO) Communication

IEEE Access
Throughput values are closer to the required values of some current wireless systems, and free-space optics (FSO) has several promising applications in scenarios where high bandwidth demand necessitates a low-cost electronic warfare (EW) strategy.
Ammar Ali Sahrab, Safaa Albasri
doaj   +1 more source