Articles tagged with Radar
Glaciologists from UCI and partner institutions have found Patagonia's ice sheets to be significantly more massive than expected, with some glaciers reaching depths of over 1,600 meters. This new understanding will help model the effects of global warming on freshwater resources and ecosystems in the region.
Newly discovered layers of ice on Mars reveal a record of past climate and could hold the key to understanding if the planet was ever habitable. The ice reserves are estimated to be as much as 90% water, equivalent to a global layer 1.5 meters deep.
Researchers developed a wireless radar system to monitor vital signs without cumbersome wires, achieving accuracy comparable to standard equipment in uncontrolled environments. The system detected subtle chest movements for sleep apnea monitoring with high precision.
Researchers at KAUST have developed a compact radar with short wavelengths to enhance close-range detection capabilities. The device is capable of target detection, speed estimation, and tracking at ranges of up to 12 meters, making it suitable for visually impaired people and unmanned devices.
Researchers propose a unified approach to optimize radar polarimetry data for precise weather forecasting. This combines observation-based retrievals with model-based analysis to improve quantitative precipitation estimation, warnings, and forecasts.
A new Tel Aviv University study demonstrates improved radar detection using low-bandwidth technology, with applications in the automotive industry and beyond. The research, published in Nature Communications, uses a partially coherent approach to achieve high-range resolution without broadband signals.
A new satellite mission has captured precise data on the elevation of the Antarctic ice sheet, demonstrating its potential as a valuable tool for long-term monitoring efforts. The Sentinel-3 satellite's performance over ice sheets shows promise in detecting areas where the ice surface is rapidly lowering.
Researchers found seasonal variations in raindrop size distribution in East China, with summer having larger raindrops and higher mean rain rates. These findings have implications for microwave communication, radar, and satellite remote sensing, as well as numerical weather prediction models.
NIST researchers demonstrate deep learning algorithms outperform traditional methods for detecting offshore radars, improving spectrum sharing. The new approach provides occupancy statistics for the 3.5 GHz band, enabling commercial users to determine when to yield to naval operations.
A new study reveals that an average of 2.1 billion birds migrate along the 1,680-mile Gulf Coast each spring, with peak activity in a specific 18-day period. The research also highlights the importance of understanding migration timing to mitigate threats from human activities.
Tropical Cyclone Kenanga is weakening due to dry air within the storm. The GPM satellite captured the storm's eye filling in and powerful storms south of its center producing heavy rainfall.
Researchers at Ohio University have found that tornadoes form from the ground up, contrary to long-held theories. This discovery has significant implications for tornado forecasting and warning systems.
A recent study found that Tehran is experiencing rapid land subsidence due to groundwater depletion and exploitation. The city's surface has sunk by several meters, posing significant environmental concerns, including cracks in building walls and crevices in the ground.
A kilometer-wide iron asteroid impact crater has been discovered in Greenland's Hiawatha Glacier, hidden under a half-mile-thick ice sheet. The crater, dated to the end of the Pleistocene era, was identified using radar data collected between 1997 and 2014.
Researchers have identified a large impact crater beneath Hiawatha Glacier in northwest Greenland, measuring 31 kilometers wide and featuring three distinct ice layers. The discovery suggests that the impactor could have been more than a kilometer wide, leading to significant environmental consequences.
The Global Precipitation Measurement mission provided detailed insights into Tropical Cyclone Alcide's heavy rainfall, revealing convective storms dropping rain at rates of over 255 mm/h. The satellite data showed the most powerful storms were located in the western eye wall, reaching heights above 16 km.
Tropical cyclone Alcide formed in the South Indian Ocean northeast of Madagascar, prompting NASA's Global Precipitation Measurement mission to analyze its rainfall. GPM's data revealed strong convective storms dropping rain at a rate of over 44 mm/hour, with measurements of precipitation heights made possible by DPR Ku Band radar.
Tropical Storm Xavier weakened to a remnant low pressure area on Nov 6, 2018, with strong southwesterly vertical wind shear observed. The GPM core satellite analyzed the storm's precipitation structure, revealing powerful convective storms reaching altitudes of up to 11.1 km.
A new study uses ground-penetrating radar to locate a potential mass grave site in Lithuania, shedding light on the Holocaust's dark history. The research aims to amass evidence for federal memorials and honors the victims of the Holocaust.
Hurricane Oscar has transitioned into an extra-tropical low pressure area, characterized by a loss of tropical characteristics and poleward displacement. The storm is expected to bring winds and rain to Ireland over the weekend of Nov. 3 and 4.
Typhoon Yutu's heavy rainfall was revealed by NASA's GPM satellite, affecting an area the size of Luzon. The storm's southwestern eye wall showed extreme precipitation falling at over 178 mm per hour.
A six-week scientific campaign, RELAMPAGO, aims to discover why thunderstorms in a particular region of Argentina are among the most extreme in the world. Researchers will use advanced instruments to study storm formation and behavior, with a focus on improving knowledge and prediction of violent storms.
Hurricane Willa strengthened into a Category 5 hurricane with maximum sustained winds of about 160 mph, producing heavy rainfall over western Mexico, threatening life-threatening flash flooding and landslides.
Ground penetrating radar can accurately estimate soil water content by analyzing the strength of early time signals. This technology allows for quick measurement across large field sites, enabling farmers to optimize water usage and test irrigation system efficiency.
The Global Precipitation Measurement mission analyzed Tropical Storm Sergio's rainfall in the Eastern Pacific Ocean. Rainfall rates of over 2.2 inches per hour were measured north of the storm's eye feature.
The University of Oklahoma is developing the fastest and most advanced radar in the nation with a $3.4 million grant. The HORUS radar can scan the atmosphere in 30 seconds or less and distinguish between snowflakes, raindrops, hail stones or other targets within a storm, critical for forecasting and prediction.
Researchers found that children of radar soldiers who were exposed to high doses of radiation had a higher rate of multisite de novo mutations and chromosomal alterations compared to offspring of non-radiation exposed parents. The results support the idea that accumulation of genotype damage by radiation can occur in the next generation.
The University of Oklahoma Advanced Radar Research Center is developing a mobile radar testbed to address operational missions and increase public safety outcomes. The all-digital polarimetric phased array system will provide multiple radar modes, including weather monitoring and air traffic surveillance and control.
Hurricane Walaka strengthened into a powerful hurricane with intense convective storms and rainfall rates of up to 6.5 inches per hour. The Global Precipitation Measurement mission's data revealed a well-organized storm with rapid intensification forecasted through Tuesday.
Tropical Storm Kirk is regenerating in the Lesser Antilles, bringing intense convective activity and heavy rainfall. The NASA GPM core satellite detected strong radar echoes of over 60 dBZ, indicating intense precipitation falling at rates of over 69 mm/h.
Researchers at the University of Kansas are part of a project using ultra-wideband radar to measure US snowpack depth and density. The goal is to predict snowmelt runoff and flooding potential for managing national water resources.
A new study uses weather forecasts and machine learning to predict bird migration across the United States, explaining 80% of variation in intensity. This tool helps reduce human-made threats during the migration journey, crucial for conserving migratory birds.
GPM analyzed Typhoon Jebi as it approached Japan, revealing intense feeder bands of thunderstorms and powerful downpours. The typhoon is forecast to intensify due to favorable environmental conditions, posing a threat to the Japanese islands.
Tropical cyclones regularly develop in the Eastern Pacific Ocean. NASA's GPM mission observed intense rainfall near Tropical Storm Miriam's center, with rain falling at over 190 mm per hour. The satellite's radar data revealed the 3D structure of precipitation within the storm, providing insights into energy release and fuel formation.
The GPM satellite provided highly accurate information about precipitation within Hurricane Lane, revealing intense feeder bands and eye wall storms. Rainfall rates reached over 89 mm/hour near the hurricane's eye, with some areas dropping rain at a rate of over 143 mm/hour.
A GPM satellite scan revealed Hurricane Lane's strengthening to a Category 2 hurricane, with intense rainfall rates of over 128 mm/hour and towering cloud heights. The storm's formation eye wall was accurately mapped using the satellite's radar data.
Researchers at FAU developed a procedure for detecting and diagnosing heart sounds using radar, with high correlation to traditional methods. The technology has the potential to replace stethoscopes and enable touch-free monitoring of patients' vital functions.
The Global Precipitation Measurement mission provided detailed coverage of hurricane John, revealing heavy rainfall in the eastern half of the hurricane. The satellite's radar data showed extremely heavy rainfall rates of over 2 inches per hour just east of John's eye, with storms reaching altitudes of up to 13.5 km.
The Global Precipitation Measurement mission observed Tropical Storm John's strengthening on August 6, 2018, with intense rainfall in feeder bands. The satellite's radar data revealed storm tops reaching heights above 13.7 km, indicating the storm's potential for intensification into a hurricane.
Researchers developed a more comprehensive method for measuring the Earth's boundary layer depth using radar, which constantly ebbs and flows. This improvement in accuracy can lead to better forecasts for severe weather events, air pollution, and wildfire forecasting.
Tropical Storm Hector is forming in the eastern Pacific Ocean, southwest of Mexico, according to NASA's GPM satellite observations. The storm is expected to strengthen into a hurricane with maximum sustained winds reaching 80 knots (92 mph) early next week.
Typhoon Jongdari is another dangerous storm affecting southern Japan and potentially South Korea, with intense rainfall and extreme wind speeds.
The Upper Guadiato Archaeological Ager Mellariensis project has analyzed 49 km2 of the territory containing ancient Roman city Mellaria using the COSMO-SkyMed constellation. The satellite technology has revealed invisible moist and floodable areas, groundwater flow, and lost medieval roads.
A 20-kilometer-wide lake of liquid water has been detected beneath Mars' southern ice cap using the Mars Advanced Radar for Subsurface and Ionosphere Sounding instrument. The presence of dissolved salts could lower the melting point, allowing the lake to remain liquid
Tropical Storm Ampil showed intense downpour in a band of thunderstorms northeast of its center with precipitation rates over 139 mm/h. The storm's heaviest rainfall shifted from the northern quadrant to the southern quadrant after passing by NASA's GPM and Aqua satellites
NASA's Global Precipitation Measurement mission tracked Tropical Cyclone Son-Tinh's trail of heavy rainfall, revealing intense precipitation rates of over 97 mm/hour. The storm made landfall in northern Vietnam on July 18, bringing strong winds and heavy rain to the region.
The Global Precipitation Measurement mission detected moderate to heavy rainfall from Tropical Cyclone Son-Tinh near the northern Philippines. Extremely heavy precipitation was recorded at a rate of over 6.5 inches per hour in some areas.
The Global Precipitation Measurement mission observed intense bands of precipitation wrapping around the eastern side of intensifying tropical storm Chris. Rainfall rates reached over 123 mm per hour in strong convective storms east of Chris' forming eye.
The Global Precipitation Measurement mission saw Tropical Storm Fabio intensify into a hurricane, with maximum sustained winds reaching near 75 mph. The storm's height of thunderstorms was estimated to be around 16 km, and rainfall measurements showed intense convective storms producing heavy precipitation.
Heavy rainfall was observed in Tropical Storm Prapiroon's southwestern side, with precipitation rates exceeding 192 mm/hour. The storm is expected to intensify into a typhoon and make landfall in South Korea.
The Global Precipitation Measurement mission captured extreme rainfall rates of up to 3.5 inches per hour in the northwestern Gulf of Mexico. Heavy flooding is expected along the coast of Texas into Louisiana, with a high risk of rip currents and minor coastal flooding.
Researchers from the University of Missouri developed a system that improves rainfall forecast accuracy by considering evaporation. This method uses dual-polarization radar to track raindrops and a model assessing atmospheric humidity, resulting in more accurate forecasts for locations 30 miles or more from National Weather Service radar.
NASA observed hurricane Aletta's intense rainfall rates and powerful storms before it weakened due to adverse conditions. The storm produced heavy precipitation, with radar data indicating a rate of over 142 mm per hour.
Tropical Storm Aletta was found to have intense rain bands with rainfall rates over 187 mm, and storm top heights of over 12 km. The Global Precipitation Measurement mission revealed these findings using GPM precipitation measurements.
NASA satellites provided an infrared, night-time and precipitation analysis of Tropical Cyclone Mekun, revealing powerful convective storms southwest of the center. The storm's cloud top temperatures were as cold as -63.1°C, indicating potential for heavy rainfall.
Firat Testik, a UTSA professor, aims to enhance rainfall estimations and climate modeling with his research on microphysics of rainfall. He will focus on understanding raindrop collisions and size distribution to develop more accurate weather radar predictions.
Researchers at Cornell University have combined weather radar and human observations to study bird migration patterns in North America. The study confirms key predictions of migration theory, including the role of body size, wind compensation, and behavioral shifts during migration.
Scientists from CReSIS and the US/UK will deploy radar technology to map Thwaites Glacier's bed topography and measure ocean interaction. This effort aims to predict the glacier's rapid retreat and resulting sea-level rise.
The GPM core satellite analyzed severe weather in the US, predicting a surge of spring tornadoes after a drought. Moisture-laden air from the Gulf of Mexico interacted with dry air, resulting in thunderstorms that spawned rotation and tornadoes.
Tropical Cyclone Fakir is expected to intensify as it moves southeastward, with heavy rainfall rates reaching over 8.6 inches per hour in some areas. The GPM satellite revealed bands of extremely heavy rainfall spiraling into the cyclone's southeastern side, and predicted that the storm could peak in strength on April 24.