Articles tagged with Radar
The Technical University of Munich (TUM) has developed an adaptive algorithm called ALES+, which can accurately measure sea levels in both open and ice-covered ocean areas. This improvement enables researchers to track changes in sea level and ocean currents, crucial for understanding climate change.
The University of Oklahoma Advanced Radar Research Center is developing new antenna and related technologies for the US Navy's next-generation radar systems. The team aims to improve agility and multi-functionality, enabling future implementation on various surfaces and platforms.
Two newly discovered subglacial lakes beneath the Devon Ice Cap in the Canadian Arctic are thought to be the first isolated hypersaline lakes in the world. The lakes, containing water four to five times saltier than seawater, exist at temperatures below freezing and have the potential to support microbial life.
The Global Precipitation Measurement (GPM) mission observed heavy convective rainfall southeast of Tropical Cyclone Iris' surface center. Heavy precipitation rates were recorded at over 59 mm per hour in that area.
Tropical Cyclone Iris has taken a long and fluctuating trek since its formation in the Coral Sea. The GPM core satellite analyzed heavy rainfall as it lingered near the Queensland coast before weakening and moving away from the coast.
Researchers developed cognitive ground-penetrating radar technology, enabling real-time underground infrastructure mapping and inspection. The technology has been showcased at the National Smart Cities Conference and won a Smart 50 Award, aiming to reduce construction permits from 18 months to hours.
The GPM satellite detected strong convective storms dropping rain at a rate of over 264 mm/hour, with some reaching heights of nearly 18 km. Favorable conditions are expected to aid Jelawat's rapid intensification and make it the first western Pacific Ocean typhoon of 2018.
Researchers from Southern Methodist University used radar satellite imagery to detect significant ground movement across a 4,000-square-mile area in four Texas counties. The study found that the movement is associated with decades of oil activity and its effect on rocks below the surface.
GPM's Dual Frequency Precipitation Radar data revealed intense convective storms in Tropical Cyclone Eliakim's northwest quadrant, dropping rain at over 205 mm/hour. The storm showed improved organization and powerful convective storms on its way to landfall in Madagascar.
Tropical cyclone Eliakim is intensifying in the Indian Ocean, with NASA's GPM satellite monitoring its formation. The storm is expected to bring heavy rainfall and potentially devastating flooding to northern Madagascar, following recent tropical cyclones Ava and Dumazile.
NASA's GPM core satellite detected towering thunderstorms southeast of Tropical Cyclone Linda's center, producing heavy rainfall at rates exceeding 7.1 inches per hour. The storm's convective activity is decreasing due to dry air moving into the system and increasing vertical wind shear.
Tropical Cyclone Hola dropped heavy rainfall on Vanuatu and New Caledonia, with maximum sustained winds of 95 knots (~ 105 mph) reported. The Joint Typhoon Warning Center expects the cyclone to recurve southeastward, avoiding a direct impact with New Caledonia.
Tropical Cyclone Dumazile brought extremely heavy rainfall to Madagascar, with over 210 mm of precipitation reported along the northeastern coast. The GPM satellite detected intense bands of rain and storms dropping rain at rates of up to 160 mm/hour, causing widespread flooding.
Tropical Cyclone Gita is weakening due to vertical wind shear, posing threats to New Caledonia and New Zealand. The storm will encounter cooler ocean waters and transition into an extra-tropical low on February 20.
The APSOS facility in Tibet provides range-resolved profiles of atmospheric variables and constituents, including temperature, wind, water vapor, and greenhouse gases. Long-term measurements are being taken to establish the first whole-atmosphere measurement database over the Tibetan Plateau.
A team of researchers at the University of Delaware is developing an augmented reality system that can spot explosive hazards precisely and from a safe distance. The technology uses traditional cameras, thermal infrared sensing, and ground penetrating radar to detect IEDs up to 30 meters away.
Tropical Cyclone Cebile in the Southern Pacific Ocean is experiencing strong vertical wind shear, causing rainfall to be pushed away from its center. The heaviest precipitation was found southeast of Cebile's center, with powerful storms on the southern side still dropping rain at high rates.
NASA's GPM satellite measured Tropical Cyclone Cebile's rainfall intensity at over 228 mm/h on January 31, 2018. The storm's eye featured a clear circular structure with deep convective banding and sharp eyewall.
A new study by Stanford researchers found that a large and unstable Antarctic glacier may be melting farther inland than previously thought, posing a threat to global sea levels. The Pine Island Glacier's Southwest Tributary could trigger or accelerate ice loss in Thwaites Glacier, potentially speeding the rate of sea-level rise.
Tropical Cyclone Irving was hurricane-force in the Southern Indian Ocean, with heavy rainfall rates of over 93 mm/h reported by GPM's DPR Ku Band. The storm's 3-D precipitation structure was examined, revealing powerful storms at altitudes of up to 17 km.
Tropical Depression Bolaven caused flooding, landslides, and at least two deaths in the Philippines with heavy rain falling at a rate of almost 121 mm per hour. A NASA satellite observed the storm's 3-D structure, revealing storm tops exceeding 16 km high.
Tropical Storm Kai-Tak generated heavy rainfall in central and southern Philippines, causing major flooding and landslides. The storm's estimated precipitation totals reached up to 512 mm (20.2 inches) along its track.
Tropical Storm Kai-tak developed near the east central Philippines, producing strong convective storms with heavy precipitation. GPM data showed intense storms dropping rain at a rate of over 143 mm/h and reaching altitudes of over 16 km.
A short-lived tropical cyclone in the Bay of Bengal produced moderate to heavy rainfall along northeastern India's coastline. The analysis used data from NASA's IMERG mission showed that more than 508 mm of rain fell in the Bay of Bengal, with storm tops reaching heights of over 11.5 km.
Researchers tracked bumblebee flight paths and found they refined routes to reduce travel distance, providing insights into route optimization in logistics and robotics. The study's large dataset offers a unique understanding of how animals solve spatial problems.
NASA's GPM mission observed remnants of Tropical Cyclone Ockhi reaching the Indian coast with heavy rainfall exceeding 101.6 mm per hour. The storms' displacement indicates strong vertical wind shear, pushing them away from the center.
Tropical Cyclone Ockhi was found to produce very heavy rainfall, with storms northwest of the eye dropping precipitation at rates over 60 mm/hour. The storm's vertical wind shear caused it to weaken, leading to a final landfall near the Gulf of Khambhat on Dec. 6.
Tropical Depression Dahlia's center was found to be devoid of rainfall by NASA's Global Precipitation Measurement mission. The storm was weakening and moving south at 10 knots, with cooler sea surface temperatures and wind shear expected to lead to its dissipation.
Heavy downpours caused schools and universities to close in Jeddah, with GPM's radar measuring precipitation at rates of over 115.5 mm/h and 90 mm/h. A 3-D view of the storms was created using data from NASA's Global Precipitation Measurement Mission.
Researchers have obtained detailed maps of Pine Island Glacier, the fastest melting glacier in Antarctica, using radar surveys and snowmobiles. The findings show a surprisingly diverse landscape under the ice, with mountains and deep scour marks that will influence the flow and behavior of the ice.
The NASA GPM satellite collected detailed data on the storm's distribution and intensity of precipitation, revealing intense rain rates over 2 inches per hour. The storm's freezing level and wind gusts were also mapped, indicating heights of up to 5.6 miles and winds greater than 70 mph.
NASA's Global Precipitation Measurement mission observed strong storms and heavy rainfall on Tropical Storm Saola, with rain rates exceeding 66 mm per hour in feeder bands. The storm showed significant structural improvement over the course of several hours, with peak intensity predicted for the following day.
Tropical Storm Saola is being affected by vertical wind shear and displaying powerful convective storms with rainfall rates exceeding 252 mm/h. The storm's height was measured to be above 17.5 km, indicating intense thunderstorms.
Typhoon Lan's powerful thunderstorms are stretching high into the troposphere, fueled by extremely warm ocean waters. The storm is expected to continue intensifying as it moves toward higher latitudes, potentially becoming a powerful typhoon with winds of up to 127mph.
The Global Precipitation Measurement mission found Ophelia's heaviest rainfall south of the center, with rain falling at a rate of almost 3.2 inches per hour. The storm strengthened into a hurricane on Oct. 11, with maximum sustained winds near 90 mph and higher gusts.
Researchers develop magnet-free non-reciprocal components on silicon chips for millimeter-wave frequencies, enabling full-duplex wireless communications, high-speed data transfer for self-driving cars and virtual reality, and transforming 5G networks.
A team led by Professor Steven Rutledge will test the SEA-POL radar in the intertropical convergence zone near the Equator. The radar uses dual polarization technology to measure ocean rainfall and collect detailed information about clouds.
Researchers found that katabatic winds in Antarctica cause sublimation of snowflakes, reducing precipitation and affecting the ice sheet's mass balance. This phenomenon could be worsened by climate change.
Penn State researchers create a low-cost delivery system for probes to collect thermodynamic data in storms, with successful launches into supercell storms. The new system aims to link temperature data with radar wind data to predict tornado formation and improve forecasts.
Hurricane Jose was found to have extremely intense downpours within its powerful convective storms, with rain falling at rates of over 8.9 inches per hour. The GPM satellite's 3D cross-section revealed storm tops reaching altitudes greater than 10.85 miles high.
Research at USC Viterbi School of Engineering has provided evidence for the occurrence of ground ice on protoplanet Vesta, a NASA-sponsored study that utilized bistatic radar techniques. The findings suggest large, smooth areas on Vesta correlated with higher hydrogen concentrations, supporting the presence of ground ice.
The GPM core observatory satellite passed over Irma on September 5, 2017, revealing intense rainfall within the storm's eyewall. The satellite's radar data showed extremely powerful storms reaching altitudes of over 10 miles, with precipitation rates exceeding 10.8 inches per hour.
The UK will build a cutting-edge space weather radar in the Arctic, providing unprecedented detail to understand space weather's effects on technology and society. The EISCAT_3D radar will measure the upper atmosphere and near-Earth space, helping scientists better comprehend the connections between Earth's magnetic field and atmosphere.
The Journal of Applied Remote Sensing has awarded three exceptional articles for their outstanding contributions to remote sensing research and applications. The winning articles focus on ice cloud measurement, a neural-network architecture for scene classification, and through-wall imaging.
The Global Precipitation Measurement mission detected extremely heavy rainfall in Tropical Storm Harvey, with rates reaching almost 5.8 inches per hour. The satellite's radar showed powerful convective storms west of the storm's center, creating a 3D image of the rainfall structure.
NASA analyzed data from Tropical Storm Franklin before it made landfall in east-central Mexico, revealing intense storms with tops reaching heights of over 9.4 miles. The analysis showed heavy rainfall rates of over 2.4 inches per hour in bands around the storm's southwestern side.
A team of researchers led by Daniel Sheldon at the University of Massachusetts Amherst is developing new analytic methods using archived radar scans from the national weather radar network. They plan to estimate bird densities and migration patterns across the US, using machine learning and computer vision techniques.
Tropical Storm Fernanda has weakened due to cooler water, dry air, and southwesterly vertical wind shear. GPM's radar revealed powerful convective storms dropping rain at nearly 7.2 inches per hour in the northwestern quadrant.
NASA's Suomi NPP and GPM satellites observed Tropical Storm Don developing in the North Atlantic, producing moderate to heavy rainfall rates of over 4.4 inches before weakening into a remnant low pressure area.
Heavy rain caused significant flooding in the US Midwest from July 7 to 14, 2017. NASA's satellite data showed parts of Wisconsin, Illinois, Indiana, and Ohio received over 6 inches of rain.
Tropical Storm Eugene is weakening due to cooler sea surface temperatures, with decreasing rainfall rates measured by NASA's Global Precipitation Measurement mission. The storm is expected to degenerate into a remnant low later in July, generating life-threatening surf and rip currents along the US west coast.
Tropical Depression 4 formed over the central Atlantic Ocean on July 6, with heavy showers and rain rates exceeding 44mm/hour. The depression is moving west-northwest at 16mph and is expected to remain a depression for several days before potentially reaching tropical storm status.
New research on Titan's lakes reveals that most waves reach only about 1 centimeter high, making it a serene environment suitable for safe landing of future probes. The study suggests that the winds are likely low, with patches of smooth and rough surfaces detected.
NASA's Global Precipitation Measurement mission tracked Dora's transformation from moderate rainfall to barely any, revealing a rapid dissipation process. The storm's convection was absent in most of its southeastern side, and its low-level center exposed to outside winds
NASA monitored Tropical Storm Cindy using its Aqua satellite's infrared light and GPM satellite's radar, revealing areas of heaviest rainfall and storm tops reaching over 7.2 miles high. The National Hurricane Center warned of life-threatening flash flooding due to heavy rainfall expected in parts of the US Gulf Coast states.
A developing low-pressure area in the Gulf of Mexico is being monitored by NASA's GPM core satellite, which gathered rainfall and storm height information. The system has triggered Tropical Storm Warnings and Watches along the U.S. Gulf Coast, with a potential tropical cyclone expected to reach the coast late Wednesday or Wednesday night.
Researchers from TUM develop new algorithm to reconstruct 4D point clouds of cities from satellite images, enabling early detection of dangers like subsidence and collapse. The method improves precision on a fraction of the radar wavelength, allowing for monitoring of urban growth and development.
NASA tracked Tropical Storm Merbok's rainfall rates and 3D structure before it made landfall east of Hong Kong. The storm showed intense precipitation patterns, with rain falling at a rate of over 57 millimeters per hour in one of its rain bands.
NASA's Global Precipitation Measurement mission detected intense rainfall in southeastern Florida, with rates exceeding 7.5 inches per hour. The GPM core satellite captured detailed images of the storms' vertical structure, showing thunderstorm tops reaching altitudes of over 9 miles.
A new millimeter-wave amplifier developed by Hiroshima University and Mie Fujitsu Semiconductor can operate at a power supply voltage of 0.5 V, significantly reducing energy consumption and increasing reliability. This technology has the potential to improve driver-assistance and self-driving capabilities in vehicles.