Articles tagged with Satellite Communications
A new algorithm was proposed to predict a satellite's attitude without sensor data, crucial for debris tracking and damage reduction. The method uses quaternions and an extended Kalman filter to estimate the satellite's state, followed by a neural network to extract unmodeled environmental torque.
A new Ka-band CMOS phased-array transmitter has been designed for small satellites, achieving 63.8 dBm equivalent isotropically radiated power with a 62% reduction in power consumption compared to state-of-the-art transmitters. The design uses an active hybrid coupler to select transmission modes and save power.
Researchers at Northumbria University are developing artificial intelligence to forecast space weather and predict serious space storms. The technology aims to protect the Earth's power grid and communication systems from disruptions caused by solar eruptions.
Researchers demonstrated high-visibility quantum interference between two independent semiconductor quantum dots, an important step toward scalable quantum networks. The observed interference visibility is up to 93%, paving the way for solid-state quantum networks with distances over 300 km.
The study found that earthquake-accelerated landslides (EALs) can maintain accelerated motion for a long time after the earthquake, causing particularly serious human casualties in seismically active areas. Satellite radar observations detected and investigated EALs in Central Italy, leading to the first ever complete EAL inventory.
Researchers have created a more robust and accurate positioning system that surpasses GPS, particularly in urban settings. The new mobile network infrastructure achieved an accuracy of 10 centimeters, making it suitable for applications such as automated vehicles and quantum communication.
New research from British Antarctic Survey predicts climate change will extend the lifetime of space debris and elevate the risk of collisions between satellites, due to reduced atmospheric density. The study's findings highlight the need for action to control space pollution and ensure the upper atmosphere remains usable in the future.
Scientists at Duke University have engineered materials capable of producing tunable plasmonic properties while withstand extremely high temperatures. The new high-entropy carbides can achieve improved communications and thermal regulation in aerospace technologies, including satellites and hypersonic aircraft.
Researchers demonstrate a compact QKD system that paves the way for cost-effective satellite-based quantum networks. The system successfully distributes secure keys between a space lab and four ground stations, representing an important step toward practical QKD networks.
The development of LEO mega constellations has significantly impacted human scientific progress in communication, navigation, and remote sensing. However, unrestrained deployment poses a threat to spacecraft safety and space environment stability, requiring rational surveillance and governance mechanisms.
The Madrid Flight On Chip (MFOC) project has successfully implemented advanced technological products and introduced disruptive changes in the design and verification of complex space systems. The project, which ran for over three years, focused on Multi-Processor System on Chip (MPSoC) components and aimed to reduce testing costs.
MIT scientists have developed 3D-printed plasma sensors that can be produced for tens of dollars in a matter of days, ideal for CubeSats. The sensors use a glass-ceramic material and can withstand wide temperature swings, measuring energy and conducting chemical analyses to predict weather or monitor climate change.
Researchers analyzed the Hunga Tonga-Hunga Ha'apai volcano's eruption to understand its effects on atmospheric waves. The blast provided an unprecedented view of atmospheric waves, allowing scientists to better predict the weather and climate.
Researchers at Carnegie Mellon University are developing a new approach to harness the power of nanosatellites, collecting data insights while in orbit and reducing latency issues. This initiative will lay groundwork for innovative applications in fields like carbon mapping, traffic management, and precision agriculture.
Three African vulture species have significantly larger home ranges than existing protected areas, increasing exposure to human-related food sources and environmental toxins. Conservation efforts require addressing challenges outside protected areas.
Researchers from Tokyo Institute of Technology have developed a novel Ka band dual circular polarization transmitter, reducing signal losses and increasing transmission efficiency. The design integrates adaptive impedance tuning and calibration techniques, enabling practical devices with improved power efficiency and wide-angle coverage.
Researchers at the University of Birmingham have developed a new beam-steering antenna that increases data transmission efficiency, particularly at higher frequencies. The technology is fully compatible with existing 5G specifications and has been demonstrated to provide unprecedented data transmission efficiency.
A team of researchers led by Prof. Federico Rosei is developing high-power active optical fibers doped with erbium and ytterbium for ultra-fast satellite communications. The goal is to convert heat dissipated by the fibers into electrical energy, enabling near real-time Earth observation imaging.
A team of researchers from Lund University analyzed ice cores from Greenland and Antarctica to discover a massive solar storm occurring during a quiet phase about 9,200 years ago. The study challenges the current understanding that solar storms are more likely to occur during active phases of the sun.
NCAR's new WindCube mini-satellite will measure the intense heating of the Sun at high altitudes, improving models of the upper atmosphere. The satellite's data will help scientists better predict impacts on communication systems and satellites due to disruptions in Earth's upper atmosphere.
The UK Space Agency has awarded £650,000 to Northumbria University to develop a commercially available laser-based inter-satellite communications system. The new technology promises to transform the satellite communications industry by transmitting data 1,000 times faster and more securely.
Researchers at UC San Diego developed a system that splits a single millimeter wave beam into multiple paths to improve reliability and throughput. The technology achieved high speeds of up to 800 Mbps with 100% reliability, even in outdoor tests over distances of 262 feet.
Researchers at ETH Zurich and partners have demonstrated a method to send precise reference frequencies via conventional telecommunications infrastructure, enabling chemical spectroscopy analyses that are 100 times more accurate than before. The approach uses the L band frequency, which is less congested by data traffic, allowing for h...
The paper presents a comprehensive overview of protected satellite communications systems, highlighting critical technologies and practical application scenarios. The authors discuss the importance of protected SatComs in military communications and identify remaining challenges and future research directions.
Researchers at Pusan National University designed a foldable, deployable antenna for CubeSats that can receive and transmit data in low-earth orbit. The antenna weighs just 5 grams and has remarkable dimensions when folded, making it ideal for nanosatellite communications.
A NASA mission will test technologies for satellite swarms to operate autonomously in low-Earth orbit, setting the stage for thousands of small satellites working cooperatively. The V-R3x mission will deploy three CubeSats into polar orbit, exchanging radio signals and measuring distance between satellites.
The team has established a quantum key distribution system over a total distance of 4,600 kilometers for users across China. The system uses trusted relays, ground-based fiber networks, and satellite-to-ground links to achieve unhackable encryption for secure information transfer.
The article outlines four key paradigm shifts for 6G wireless communication networks: global coverage through non-terrestrial networks, full spectrum exploration for increased data rates, AI-powered smart applications, and enhanced network security. The future of 6G promises faster and more secure communications, blurring the lines bet...
A new device created by researchers at the University of Texas at Austin can overcome challenges like bad weather to deliver more secure, reliable communications. The chip operates in mid infrared light spectrum, allowing signal to penetrate through clouds, rain and other weather conditions without significant loss.
A new optical communications ground station is being built in Western Australia to receive high-speed data transmissions from space. The station will be part of a larger network and support groundbreaking projects, including NASA's Artemis mission.
A new £20M research program will enhance UK's space weather monitoring capability, enabling faster and more accurate predictions of solar superstorms and severe space weather events. The University of Birmingham leads the effort, developing data modeling technology to underpin the work.
Researchers are exploring a human-centric approach for 6G communications, emphasizing the need for secure, affordable, and accessible networks that protect users' mental and physical health. The technology will also require innovative solutions such as decentralized blockchain networks and artificial intelligence to enhance performance.
Researchers have developed algorithms that limit control information without affecting network performance, enabling IoT via satellite to become more efficient and accessible. This is crucial for applications like smart farming and home automation, where wireless communication between machines is essential.
A secure data backup system has been developed to store and restore medical records via a satellite link, enabling prompt restoration within 9 seconds. The system uses secret sharing and secure communications technologies to protect confidential personal information.
The Kennedy Uplink Station is a critical component of NASA's Launch Communications Segment, providing uplink and downlink communications between Artemis astronauts and mission controllers. The segment has reduced costs and simplified operations, enabling NASA to save tens of millions of dollars in operating costs over its lifetime.
Physicist Yue Deng is developing a space weather simulator to predict how energy is distributed during solar flares and magnetic storms. The goal is to improve models' accuracy, affecting GPS and communication systems.
Researchers propose inventory control method to efficiently swap out broken satellites, ensuring continuous global coverage. The 'warehouse strategy' utilizes lower-altitude parking orbits and batch launches to minimize costs and maximize efficiency.
The SULIS mission aims to understand the nature of solar eruptions and track magnetic clouds of charged gas. It will also demonstrate new technologies in space and precision alignment of small satellites flying in formation.
Australia has launched a $245 million national research hub to develop new generation satellite technologies, projected to boost its space industry from $3 billion to $12 billion by 2030, generating 20,000 jobs.
Researchers have demonstrated feasible global quantum communication between high-orbiting satellites and a ground station, exchanging single photons over 20,000km. This milestone experiment proves secure quantum communications on a global scale using the Global Navigation Satellite System.
Researchers create integrated quantum transceiver capable of sending and receiving quantum information over various waveforms, enabling fast, robust and photon-efficient quantum communications. The team aims to develop a single-chip system that can be used for both free space and optical fiber communication.
Researchers at UNIGE have developed a laser that can create a temporary hole in clouds to transmit data, overcoming the limitations of radio frequency signals. This technology has the potential to enable global implementation by 2025.
ELFIN aims to measure magnetic waves and 'lost' electrons, verifying the causal mechanism behind energetic electrons escaping the Van Allen Belts. The mission uses two CubeSats to observe electron precipitation across space and time.
Professor Atiquzzaman, an international expert in satellite communications, receives the prestigious award for his research achievements in next-generation computer networks and wireless mobile networks.
NASA's GOLD instrument successfully completed its initial power-on test, paving the way for further research into space weather events. The mission aims to improve forecasting models and understand the dynamic intermingling of space and Earth's uppermost atmosphere.
A cross-disciplinary team developed a satellite, Micius, to facilitate secure quantum key distribution globally. The system has achieved significant milestones, including decoy-state QKD with kHz rates over 1200 km distances, demonstrating the potential for an ultra-long-distance global quantum network.
Archaeologists have uncovered a vast, structured surveillance and communication network dating back to the Middle Bronze Age in northern Syria. The network, comprising fortresses, small forts, towers, and enclosures, stretched across approximately 7,000 km2 and was designed to protect urban areas and transport corridors.
A researcher at University of Akron is helping NASA develop smart satellites that can recognize environmental threats and complete tasks automatically. The goal is to reduce the need for real-time predictions and enable more efficient space exploration.
The Tracking and Data Relay Satellites (TDRS) have provided critical communication services to NASA's missions since the 1980s, increasing global communication coverage to over 99%. The TDRS network will continue to play a vital role in space communications for years to come.
Scientists successfully demonstrated quantum communication between a satellite and a ground station, enabling the development of future satellite constellations. The technology uses lasers for high power efficiency and smaller terminals, facilitating the adoption of quantum key distribution for secure information transmission.
Ground-based measurements of quantum states sent by a laser aboard a satellite demonstrate the feasibility of a satellite-based quantum communication network. This breakthrough could enable an extremely secure way to encrypt data sent over long distances, potentially cutting development time in half.
Researchers have successfully transmitted quantum key distribution signals from a ground transmitter to a moving aircraft, paving the way for global-scale quantum communication. The system achieved secure keys up to 868 kb in length and demonstrated viability of satellite-based quantum communications.
NASA has adopted a 'sneaker depth' method to visualize and communicate water clarity, inspired by Bernie Fowler's data. The algorithm relates satellite measurements of red light reflection to physical measurements of shoe visibility.
The Tracking and Data Relay Satellite (TDRS) project is completing final testing on a new satellite that will extend NASA's Space Network capabilities. The addition of TDRS-M will provide nearly continuous coverage for an additional 15 years.
Photonics may provide solutions to NASA's pressing challenges in future spaceflight, including improved space communications and reducing mission payloads. Laser communications have the potential to increase data rates at least 10 to 100 times better than RF systems.
Researchers have developed a new approach to destroying hazardous space debris using laser impulses. By pushing the debris into the Earth's atmosphere, the debris can be destroyed, posing less of a threat to active communication and navigation satellites used by billions of people on Earth.
The C/NOFS satellite provided comprehensive observations of the ionosphere, improving models to predict satellite trajectories and orbital drag. The data revealed strong interactions between charged particles and neutral particles in the atmosphere, affecting radio wave navigation and communication systems.
The Magnetospheric Multiscale (MMS) mission successfully launched a unique formation of four identical spacecraft to study magnetic reconnection, driving space weather events that disrupt Earth's orbit. The Goddard-developed Navigator GPS receiver enabled precise navigation and tracking in weak signal areas.
Researchers at CIFAR have developed a method to compress quantum information into fewer qubits while preserving its content. This breakthrough has significant implications for efficient quantum computing and communication.
Researchers successfully tested a ZigBee wireless sensor network in space, demonstrating the feasibility of using this technology for satellite communication. The experiment achieved remarkable inter-satellite communications over long distances, with theoretical estimates suggesting a range of up to 15.552 km.