Results 71 to 80 of about 3,019,942 (301)

Bayesian Adaptive Extended Kalman-Based Orbit Determination for Optical Observation Satellites

Sensors
As the number of satellites and amount of space debris in Low-Earth orbit (LEO) increase, high-precision orbit determination is crucial for ensuring the safe operation of spacecraft and maintaining space situational awareness.
Yang Guo, Qinghao Pang, Xianlong Yin, Xueshu Shi, Zhengxu Zhao, Jian Sun, Jinsheng Wang   +6 more
doaj   +1 more source

Satellite monitoring systems

Eos, Transactions American Geophysical Union, 1979
A circular describing satellite telemetry systems that can collect and transmit environmental data from remote regions of the world to regional resource information centers has been published by the U.S. Geological Survey.The 21‐page circular attempts to answer the most common questions asked about various satellite data collection systems and ...
openaire   +1 more source

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

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

Satellite rainfall monitoring

Eos, Transactions American Geophysical Union, 1978
Imagery from earth‐orbiting satellites can be used to estimate rainfall from convective clouds according to researchers at NOAA. William L. Woodley and Cecilia Griffith see this as a possible method of monitoring rainfall constantly around the world.The technique, developed for estimating rainfall from convective weather systems in the tropics for NOAA'
openaire   +1 more source

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 more
wiley   +1 more source

Near Real-Time Disturbance Detection in Terrestrial Ecosystems Using Satellite Image Time Series: Drought Detection in Somalia [PDF]

Near real-time monitoring of ecosystem disturbances is critical for addressing impacts on carbon dynamics, biodiversity, and socio-ecological processes.
Martin Herold, Jan Verbesselt, Achim Zeileis   +2 more
core  

In-flight Monitoring of TerraSAR-X Radar Instrument Stability [PDF]

, 2007
For calibrating and monitoring the radiometric stability, the radar instrument of TerraSAR-X hosts a passive calibration network coupling into an additional port of the T/R modules. Three different types of calibration pulses are applied, whereby sets of
Schwerdt, Marco, Bachmann, Markus, Bräutigam, Benjamin   +2 more
core  

Gradient‐Conductivity Architecture Enables Synchronous Enhancement of Sensitivity and Detection Range in Multifunctional All‐Paper Sensors

Advanced Functional Materials, EarlyView.
A gradient‐engineered all‐paper sensor is fabricated by integrating MXene and in situ grown AgNPs within hierarchical cellulose networks. The device breaks the sensitivity–detection range trade‐off through cascaded conductive pathways, enabling ultrahigh pressure sensitivity, humidity–pressure decoupled dual‐mode sensing, and outstanding EMI shielding,
Ao Li, Jun Xu, Dezhong Xu, Zhaohui Zhang, Jiyi Li, Daxian Cao, Kefu Chen, Mizi Fan   +7 more
wiley   +1 more source

On the quality of VoIP with DCCP for satellite communications [PDF]

, 2012
We present experimental results for the performance of selected voice codecs using DCCP with CCID4 congestion control over a satellite link. We evaluate the performance of both constant and variable data rate speech codecs for a number of simultaneous ...
Emmanuel Lochin, Roksana Boreli, Lochin, Emmanuel, Golam Sarwar, Sarwar, Golam, Boreli, Roksana   +5 more
core   +1 more source