Showing 20 articles starting at article 1201
Categories: Ecology: Invasive Species, Space: Exploration
Published Maintaining large-scale satellite constellations using logistics approach
(via sciencedaily.com) Researchers have identified a critical hidden challenge about replacing the broken satellites in megaconstellations and proposed a unique solution with inventory control methods.
Published New high-definition satellite radar can detect bridges at risk of collapse from space
(via sciencedaily.com) An early warning system to identify at-risk structures using Synthetic Aperture Radar (SAR) has been developed. The system could be applied to infrastructure projects including roads, railways and building developments at lower cost and greater accuracy than existing techniques.
Published How icy outer solar system satellites may have formed
(via sciencedaily.com) Beyond the orbit of the planet Neptune, there are a multitude of icy and rocky small bodies, smaller than planets but larger than comets. These likely formed at the same time as the Solar System, and understanding their origin could provide important clues as to how the entire Solar System originated. Using sophisticated computer simulations and observations of TNOs, astronomers have shown how these so-called trans-Neptunian Objects (or TNOs) may have formed.
Published Auroral 'speed bumps' are more complicated, scientists find
(via sciencedaily.com) Researchers find that 'speed bumps' in space, which can slow down satellites orbiting closer to Earth, are more complex than originally thought.
Published New model accurately predicts harmful space weather
(via sciencedaily.com) A new, first-of-its-kind space weather model reliably predicts space storms of high-energy particles that are harmful to many satellites and spacecraft orbiting in the Earth's outer radiation belt.
Published Measuring impact of drought on groundwater resources from space
(via sciencedaily.com) A team of scientists has been using the latest space technology, combined with ground measurements, to assess the health of one of the nation's most important sources of underground water, a large aquifer system located in California's San Joaquin Valley.
Published Tiny Neptune moon spotted by Hubble may have broken from larger moon
(via sciencedaily.com) After several years of analysis, a team of planetary scientists using NASA's Hubble Space Telescope has at last come up with an explanation for a mysterious moon around Neptune that they discovered with Hubble in 2013.
Published River levels tracked from space
(via sciencedaily.com) The 4,300 kilometer Mekong River is a lifeline for South-East Asia. If this mighty river system bursts its banks, flooding can affect the lives and livelihoods of millions of people. A new method makes it possible to monitor complex river basins using satellite data only.
Published The lonely giant: Milky Way-sized galaxy lacking galactic neighbors
(via sciencedaily.com) Long ago in a galaxy far, far away, fewer galaxies were born than expected -- and that could create new questions for galaxy physics, according to a new study.
Published Astronomers find first compelling evidence for a moon outside our solar system
(via sciencedaily.com) On the hunt for distant worlds, researchers have identified an exomoon candidate around the transiting exoplanet Kepler-1625b that indicates the presence of a previously unknown gas-giant moon.
Published Satellites more at risk from fast solar wind than a major space storm
(via sciencedaily.com) Satellites are more likely to be at risk from high-speed solar wind than a major geomagnetic storm according to a new study.
Published Satellite measurements of the Earth's magnetosphere promise better space weather forecasts
(via sciencedaily.com) A Japan-based research team led by Kanazawa University equipped the Arase satellite with sensors to study the convoluted interactions between high-energy particles in the inner magnetosphere and the Earth's electric and magnetic field. They have collected their first set of data from the satellite and from ground-based sensors, which they will soon analyze. Their approach promises to provide better predictions of harmful bursts of high-energy particles from the magnetosphere.
Published Last of universe's missing ordinary matter
(via sciencedaily.com) Researchers have helped to find the last reservoir of ordinary matter hiding in the universe.
Published Options to optimize profit in broadband satellite constellations
(via sciencedaily.com) Several large telecommunications companies have proposed plans to provide global broadband services by launching hundreds and even thousands of satellites into orbit. Although broadband for everyone sounds like a great idea, it also carries great financial risk, resulting in bankruptcy for some who've tried it. Recent research suggests a more cost-effective strategy using regional coverage and staged deployment.
Published Researchers shine a light on more accurate way to estimate climate change
(via sciencedaily.com) By using satellite data from different major land-based ecosystems around the globe, researchers have found that the photosynthesis glow is the same across all vegetation, no matter the location. This first-of-its-kind global analysis could have significance in providing more accurate data for scientists working to model carbon cycle and eventually help better project climate change.
Published Frequency-stable laser systems for space
(via sciencedaily.com) For the first time a frequency reference based on molecular iodine was successfully demonstrated in space! What sounds a bit like science fiction is an important step towards laser interferometric distance measurements between satellites as well as for future global navigation satellite systems based on optical technologies. The frequency reference tests were carried out on May 13 on board the sounding rocket TEXUS54.
Published May the forest be with you: GEDI moves toward launch to space station
(via sciencedaily.com) GEDI (pronounced like 'Jedi,' of Star Wars fame) is a first-of-its-kind laser instrument designed to map the world's forests in 3-D from space. These measurements will help fill in critical gaps in scientists' understanding of how much carbon is stored in the world's forests, the potential for ecosystems to absorb rising concentrations of carbon dioxide in Earth's atmosphere, and the impact of forest changes on biodiversity.
Published Weather satellites aid search and rescue capabilities
(via sciencedaily.com) Original source The same satellites that identify severe weather can help save you from it. NOAA's GOES series satellites carry a payload supported by NASA's Search and Rescue (SAR) office, which researches and develops technologies to help first responders locate people in distress worldwide, whether from a plane crash, a boating accident or other emergencies.
Published Laser-ranged satellite measurement now accurately reflects Earth's tidal perturbations
(via sciencedaily.com) Original source Tides on Earth have a far-reaching influence, including disturbing satellites' measurements by affecting their motion. The LAser RElativity Satellite (LARES), is the best ever relevant test particle to move in the Earth's gravitational field. In a new study, LARES proves its efficiency for high-precision probing of General Relativity and fundamental physics.