Articles tagged with Radar
IceBridge began its 2014 Arctic campaign with two sea ice surveys north of Greenland, focusing on changes in sea ice elevation and thickness. The mission aims to collect more data, including cross-basin surveys over the Arctic Ocean and flights over the Beaufort and Chukchi seas.
The University of Oklahoma's new radar system, part of the Dallas-Fort Worth Urban Demonstration Network, aims to improve severe weather warning operations. The network will use data from local, state, and federal agencies, as well as private sector sources, to provide real-time analysis and forecasts.
Researchers discovered a new aquifer in the Greenland Ice Sheet that holds liquid water all year long, covering 27,000 square miles. This find is crucial for understanding the contribution of snowmelt and ice melt to rising sea levels.
IceBridge collected data on many facets of Antarctic land and sea ice, including ice elevation and thickness. The mission also took measurements of sea ice in the Ross Sea, an area with comparatively little attention compared to other parts of the Southern Ocean.
The NASA airborne mission is using a low-frequency radar instrument to map the sub-glacial bedrock hidden beneath thick ice sheets. The Multichannel Coherent Radar Depth Sounder (MCoRDS) measures ice thickness and maps sub-ice rock by sending radar waves down through polar ice.
NASA's TRMM satellite monitored Tropical Storm Melissa's transition to a tropical storm, revealing intense rainfall rates of up to 55 mm/hour. The satellite's Precipitation Radar data also showed the storm's structure, including towering convection near its center.
The cloak effectively hides objects from radio waves by radiating an electromagnetic field that cancels out reflections. The system can be scaled up to cloak larger objects and has potential applications in telecommunications and surveillance.
Typhoon Krosa made landfall in extreme northern Luzon, bringing strong winds and heavy rainfall. The storm's center was located near Manila, Philippines, with maximum sustained winds of 90 knots.
Typhoon Francisco was already impacting southern Japanese islands on Oct. 22 when NASA's TRMM satellite captured its intense rainfall and cloud heights. The storm was weakening with estimated winds of less than 75 knots, but heavy rain continued to fall at a rate of over 3 inches per hour.
Typhoon Francisco is expected to make a brief landfall near Tokyo as it moves towards Japan. NASA satellites captured detailed data on the storm's structure and rainfall patterns, revealing extreme precipitation rates of over 207 mm per hour in violent storms southwest of its eye.
Typhoon Usagi made landfall in Guangdong Province on September 22 with maximum sustained winds near 110 mph, displacing over 310,000 residents and causing widespread destruction. Heavy rainfall rates reached up to 6.7 inches per hour along China's coast.
Supertyphoon Usagi's rapid intensification by 65 knots in just 24 hours is more than twice the threshold for defining such an event. The storm's well-organized structure and efficient heat engine contribute to its extreme behavior.
Hurricane Humberto's strongest precipitation was concentrated in the northwestern quadrant due to intense southwesterly wind shear. The storm is expected to weaken to a tropical storm late on September 13, with winds near 75 mph and shifting trajectory towards the west-northwest.
Heavy rainfall was detected south of Tropical Storm Humberto's center with rain rates reaching 2 inches per hour. The storm strengthened to near 65 mph winds and is expected to turn northwest before moving north, posing threat to the Atlantic Ocean season.
A new FINDER technology uses microwave radar to detect human breathing patterns and heartbeats in rubble. The system is sensitive enough to locate victims buried under 30 feet of debris, revolutionizing search and rescue operations.
A massive canyon hidden under a mile of ice has been discovered in Greenland, stretching over 460 miles and reaching depths of 2,600 feet. The feature is thought to be ancient, pre-dating the current ice sheet, and plays a crucial role in transporting sub-glacial meltwater.
Researchers have used innovative radar analysis to accurately image the vast subglacial water system under Thwaites Glacier, a Florida-sized outlet glacier in Antarctica. The findings suggest that the dynamics of this water system may play a crucial role in predicting the fate of the glacier.
GROVER successfully demonstrated autonomous operation in Greenland's harshest environment, collecting radar data and transmitting information in real-time. The robot's performance was affected by extreme polar conditions, but the results promise potential for future autonomous robotic platforms to support scientific research.
Tropical Storm Rumbia brought heavy rainfall to southern China with rainfall rates over 92mm/hour, impacting areas near the Gulf of Tonkin. NASA's TRMM satellite data showed intense thunderstorms streaming heavy rainfall into China from the South China Sea.
Researchers at MIT have developed a system called Wi-Vi that uses low-cost Wi-Fi technology to track human movement through walls and closed doors. The system cancels out reflections from static objects, allowing it to detect only moving humans.
D.J. Seo's research will provide timely and location-specific information for dispatching emergency personnel in flash-flooding situations, reducing response times by up to 30 minutes. The prototype will also examine the impact of development on rainfall-runoff response and improve water conservation programs in North Texas.
Margaret Cheney, a leading researcher in inverse problems and radar imaging, will deliver the AWM-SIAM Sonia Kovalevsky Lecture. Her work has developed solutions to longstanding problems in radar imaging using Microlocal Analysis, a method largely unknown to the radar community.
Researchers develop new techniques to detect mass graves using geophysical methods. Their project aims to refine detection methods and provide critical evidence for convicting murderers. By studying simulated clandestine graves, they hope to improve the search for missing people and bring perpetrators to justice.
GROVER will collect measurements to study how snow accumulates on the ice sheet, adding layer upon layer over time. The robot carries a ground-penetrating radar to detect the layer of the ice sheet formed after an extreme melt event.
UT Arlington professor Qilian Liang has developed an algorithmic system that simplifies data collection for radar systems, allowing for better performance with less data. The system uses co-prime and nested samplings to eliminate redundant data, resulting in faster decision-making and more efficient image formation.
NASA's TRMM satellite detected a significant drop in rainfall intensity of Cyclone Sandra from March 11 to 13, with the heaviest rain falling south of the storm's center. The weakening tropical cyclone moved into an area of high wind shear and cold sea surface temperatures, expected to transform it into a cold-core system.
Scientists at NIST and University of Maryland have developed a practical high-efficiency nanostructured electron source, leading to improved microwave communications and X-ray imaging systems. The new technology offers faster response times, reliability, and reduced power consumption compared to traditional thermionic sources.
Researchers deploy self-guided robot Yeti to map deadly crevasses hidden in ice-covered terrains, reducing danger to human lives and equipment. The robot uses ground-penetrating radar to reveal unseen fissures buried beneath ice and snow.
Researchers developed a 2-D optical phased array with 4,096 nanoantennas on a silicon chip, revolutionizing LADAR technology. The breakthrough enables high-resolution beam patterns and has potential applications in biomedical imaging, holographic displays, and ultra-high-data-rate communications.
TRMM satellite data shows a complete eyewall in Tropical Cyclone Evan, suggesting rare system strength. Radar reflectivity analysis indicates the storm did not intensify despite a strong radar signal.
The study finds that the combined rate of ice sheet melting is increasing, with Antarctica and Greenland losing more than three times as much ice as in the 1990s. The new research confirms that both polar regions are losing ice, contrary to earlier uncertainty.
A novel imaging method based on SISAR is proposed to extract the target profile accurately in forward scatter radar (FSR). The method can effectively deduce the target type, such as a cruise missile or unmanned aerial vehicle. Simulations are conducted to evaluate the validity of the algorithm, showing promising results for stealth tar...
The MESSENGER spacecraft provided new lines of evidence for the existence of water ice on Mercury, with measurements from its laser altimeter and hydrogen concentrations from the neutron spectrometer. The findings suggest that ice is present near the north pole, covered by a layer of material in most areas.
Tropical Storm Prapiroon experiences heavy rainfall due to interaction with a frontal system over Japan. The storm has weakened significantly, with maximum sustained winds dropping near 35 knots.
Tropical Storm Patty formed on October 11 and showed strong thunderstorms around its center, intensifying into a tropical storm within six hours. NASA's satellite imagery captured the storm's rainfall intensity and cloud heights, indicating a potential strengthening of the system before it weakens due to dry air.
Scientists tracked bumblebees to understand their route selection process. After an average of 26 attempts each bee refined its route through trial and error, selecting the most efficient path. The study revealed that bees don't easily forget a fruitful flower and can learn complex routes without visual cues.
Scientists tracked bumblebees in a field setting to study how they select optimal routes to collect nectar. After repeated trials, bees refined their paths, using mathematical models to understand their learning process and optimize their routes.
The US Department of Homeland Security has created a surrogate semi-submersible called PLUTO to test detection systems for maritime security. The vessel is designed to mimic the features of illegal narco subs used by South American drug cartels, allowing operators to test and improve their sensors in real-world conditions.
The LRO radar has detected small patches of ice in the walls of Shackleton crater, with estimates suggesting they could make up at most 5-10% of the material by weight. This finding supports the possibility that permanently shadowed lunar craters are sites for water accumulation.
Tropical Depression 7's remnants are regaining strength in the warm waters of the Bay of Campeche, Mexico. The National Hurricane Center warns of a high chance (70%) of reformation into a tropical depression.
Tropical storm Kai-tak is causing more rain in the Philippines as it passes over northern Luzon, with Public storm warning signals in effect for several provinces. The storm has dropped extreme amounts of rainfall, including intense precipitation of over 100mm/hr, affecting the island of Luzon and neighboring areas.
Heavy rainfall and high thunderstorms are expected from NASA's observations of Tropical Storm Ernesto, with estimated totals of 12 inches in isolated areas. The storm's center is surrounded by strong storms, producing cloud top temperatures as cold as -63F (-52C).
Tropical Storm Guchol weakened as it approached Japan, passing over the mainland on June 19, 2012. Radar and infrared imagery captured by NASA's TRMM and Aqua satellites showed a weakening typhoon with maximum sustained winds near 55 knots.
UMass Amherst researchers Michael Zink and Brenda Philips lead US Ignite project to create virtual online laboratory for real-time network experimentation. The goal is to enhance next-generation Internet with ultra-high-speed networks, improving weather forecasting and aircraft surveillance.
Heavy rainfall and intensification signs were observed in Tropical Storm Bud by NASA's TRMM satellite. The storm is heading northwest at 9 mph with sustained winds near 65 mph, expected to slow down and turn north-northeast by Friday.
Researchers use satellite-based data to measure crustal uplift at unprecedented accuracy, indicating a relatively fast rise of 1 to 2 millimeters every year. This data challenges previous estimates and suggests the modern Sierra Nevada could be formed in less than 3 million years.
Researchers at the UPNA-Public University of Navarre are developing a radar system to protect pedestrians from frontal impact. The system will use heat detection and radar technology to warn drivers of potential collisions and alert them to the presence of pedestrians in their path.
Researchers from SRI International and the University of Michigan have taken the first-ever measurement of naturally occurring auroral turbulence recorded using a nanosatellite radar receiver. The RAX CubeSat measured turbulence over Fairbanks, Alaska in response to a geomagnetic storm triggered by the largest solar flare in five years.
The Dual-Frequency Precipitation Radar has arrived at NASA's Goddard Space Flight Center, providing three-dimensional measurements of raindrop shapes and sizes to better understand storm physical properties. This instrument will be integrated into the GPM Core Observatory, enabling more accurate precipitation estimates globally.
Tropical Storm Lua formed in the Indian Ocean off Australia's northwestern coast, causing moderate rainfall and strong thunderstorms. The storm prompted a Cyclone Watch from Cape Leveque to Mardie, Western Australia, and is expected to strengthen into a cyclone before landfall.
TRMM satellite reveals heavy rainfall and powerful thunderstorms near the storm's circulation. The storm's structure was analyzed using 3D images, showing towering thunderstorm towers and high radar reflectivity values.
Cyclone Jasmine was classified as a powerful category 4 cyclone with wind speeds of 132 mph, but was weakening due to cooler waters and drier air. A 3D image created from TRMM data revealed the eye's funnel-shaped surface and intense thunderstorms dropping rain at over 2 inches/hr.
A new radar system uses ultra-wideband radio waves to quickly identify objects on train tracks, including luggage items and people who may have fallen. The system has been successfully tested in simulations and real-life experiments, showing its potential to prevent serious accidents and reduce delays.
Tropical Storm Washi's rainfall analysis revealed widespread heavy rain throughout the entire storm. The storm showed improved organization and thunderstorms spiraling into its center, with feeder bands converging near Mindanao.
The ARM Climate Research Facility has deployed 18 new scanning radars to study the lifecycle of clouds. These radars provide unprecedented data on cloud formation, structure, and evolution.
Tropical Storm Alenga is strengthening due to warm sea surface temperatures and low wind shear, with maximum sustained winds reaching up to 63 mph. The storm is forecast to continue intensifying before encountering strong westerly wind shear and weakening.
TRMM data revealed a narrow line of moderate to very heavy rainfall associated with the cold front, accompanied by tornadoes and strong winds. The analysis showed the area of heavy rain was confined to a specific region, highlighting the severity of the storm.
Prof. Richard Isralowitz of Ben-Gurion University of the Negev received a US National Distinguished International Scientist Award for his work as director of the Regional Alcohol and Drug Abuse Resources (RADAR) Center. RADAR focuses on substance use issues among Israeli and former Soviet Union-origin youth and adults.
The Office of Naval Research is pursuing an Affordable Common Radar Architecture (ACRA) to upgrade the Navy's aging combat ship radar systems. The ACRA design features a novel architecture with two separate antennas to control cost and improve upgradeability.
Scientists have successfully observed a tsunami using high-frequency radar, which can detect changes in ocean currents and track wave movement. This innovation could lead to improved early warning systems for coastal regions like Southeast Asia and the East Coast.