Sentences with phrase «radar observations in»

Smith, S.A., and A.D. Del Genio, 2001: Analysis of aircraft, radiosonde, and radar observations in cirrus clouds observed during FIRE II: The interactions between environmental structure, turbulence, and cloud microphysical properties.

Radar observations in the 1970s revealed details of Venus» surface for the first time.

Not exact matches

Using satellite radar and helicopter observations, scientists at Laval University in Quebec and the University of Alaska at Fairbanks discovered that the more - than -150-square-mile Ward Hunt Ice Shelf on the north coast of Canada's Nunavut territory has split in half.

«These scientists combined citizen science observations with data from radar, satellites and weather predictions to understand the cues birds use in their migrations across continents,» said Liz Blood, program director in the National Science Foundation's Division of Environmental Biology, which funded the research through NSF's MacroSystems Biology Program.

Visible light can't pierce Venus's thick shroud of clouds, so most of what astronomers know about the planet's surface comes from observations in radar and other wavelengths.

Concurrently with the radar imaging, the scientists also used the radar transmitter at the Arecibo Observatory in Puerto Rico and a portion of the antennas that are part of the National Radio Astronomy Observatory's (NRAO) Very Long Baseline Array (VLBA) to perform an observation known as radar speckle tracking.

• Radar observations by the giant Arecibo telescope in Puerto Rico allow NEA trajectories — and impact probabilities — to be determined most precisely, but uncertain funding threatens this capability.

In radar observations a few weeks apart it found evidence that methane showers had soaked the soil, then evaporated — the first proof of precipitation beyond Earth.

Based on field observations, seismic shaking data, GPS measurements, and radar imagery from satellites, Hamling and his colleagues found that surface ruptures in the New Zealand quake were widely separated — in one case by more than 15 kilometers.

In 1965, however, radar observations showed conclusively that the planet's rotational period was about 59 days.

Over the three months that followed the initial detection, the technique was able to obtain radar echoes from Chandrayaan - 1 seven more times, including during follow - up observations made by the powerful Arecibo Observatory in Puerto Rico.

«Radar observations of a relict ice stream margin traversing Siple Dome, Antarctica,»» Antarctic Journal of the United States, XXX (5), (in press).

On May 3, 2007, team of astronomers (including Jean - Luc Margot; Stan Peale; Igor V. Holin; Raymond F. Jurgens; and Martin A. Slade) announced new evidence that Mercury has a partially molten core using new observations of fluctuations in Mercury's spin obtained with radar signals bounced off the planet from Earth (with the 305 - meter Arecibo, the 34 - meter Goldstone, and the 100 - meter Robert C. Byrd Green Bank radio telescopes).

The effort uses innovative ARM radar observations from the MC3E field campaign to evaluate a series of high - resolution simulations, which results in an improved understanding of cloud transitions and how to diagnose these transitions in models.

There is also some unconfirmed evidence of recent volcanism on Mercury, and radar observations of Mercury's north pole show evidence of water ice in the protected shadows of some craters.

Radar observations are unusual in astronomy because they aren't just about picking up signals from the universe around us.

Later in 1971, Goldstein refined the rotation period to be 58.65 + - 0.25 days using radar observations.

In 1965, Pettengill and Dyce determined Mercury's period of rotation to be 59 + - 5 days based upon radar observations.

Recently, truck - borne Doppler radar observations of tornadoes (readers who watch tornado TV shows would be familiar with such devices) have identified a number of cases in which the radar - measured winds are considerably faster than the official NWS rating implies.

Using satellite radar interferometry observations of Greenland, we detected widespread glacier acceleration below 66 - north between 1996 and 2000, which rapidly expanded to 70 - north in 2005.

Rainfall rates derived from satellite data have a long legacy in operational weather forecasting because their information complements ground observations such as weather radar and rain gauges.

Here, satellite radar observations are used to produce a composite picture of the life cycle of convection in these two regions.

A study using Earth Remote Sensing satellite radar interferometry (EERS - 1 and -2) observations from 1992 through 2011 finds «a continuous and rapid retreat of the grounding lines of Pine Island, Thwaites, Haynes, Smith, and Kohler» Glaciers, and the authors conclude that «this sector of West Antarctica is undergoing a marine ice sheet instability that will significantly contribute to sea level rise in decades to centuries to come» (Rignot et al. 2014).

Radar observations of individual rain drops in the free atmosphere, Proceedings of the National Academy of Sciences, doi: 10.1073 / pnas.1117776109.

Scientists from the University of Erlangen - Nuremberg Institute of Geography and from the Laboratoire de Glaciologie et Gophysique de l'Environnement in Grenoble, France, used radar data from satellites such as ESA's Envisat and observations of ice thickness from airborne surveys in a complex model to demonstrate, for the first time, how the buttressing role of the ice shelves is being compromised as the shelves decline.

Microwave radars of the European Remote - Sensing Satellites (ERS), radiometers of the Defense Meteorological Satellite Program (DMSP) and the dual - frequency altimeter TOPEX - POSEIDON have shown their ability to improve the description and location of storms, especially in the case of tropical cyclones for which very few traditional observations exist.

Sentinel - 1A / B operate a synthetic aperture radar (SAR) with advanced observation capabilities in all weather conditions over the ocean (wind, waves, and surface current) and sea ice field (sea ice deformation, lead fraction and sea ice drift).

It costs little to field the observations — the satellites and the radars, the surface in situinstruments, etc. to monitor conditions and their changes; to assimilate the data into variety of numerical models, to run these and form ensemble averages; to disseminate the findings.

They expected to find a decline in ice thickness when they embarked on a study of radar observations of 402 lakes near Barrow in Alaska from the European earth resources satellites ERS - 1 and ERS - 2.

Now, with 10 years of observations using its Advanced Synthetic Aperture Radar, ASAR, Envisat has mapped an additional loss in Larsen B's area of 1,790 sq km (690 square miles) over the past decade.»

Satellites track Antarctic ice loss over decades02 May 2017 Over two decades of observations by five radar satellites show the acceleration of ice loss of 30 glaciers in Western Palmer Land in the southwest Antarctic Peninsula.

Matrosov S. Y., C. G. Schmitt, M. Maahn and G. de Boer (December 2017): Atmospheric Ice Particle Shape Estimates from Polarimetric Radar Measurements and In Situ Observations.

«The differences between sea water temperature reported in the Log of Ship's Weather Observations and specially observed sea surface temperature were studied for 6826 pairs of observations taken in the Pacific Ocean from 3 Military Sea Transport Service ships and 9 U.S. Navy Radar Picket ships during 92 diffObservations and specially observed sea surface temperature were studied for 6826 pairs of observations taken in the Pacific Ocean from 3 Military Sea Transport Service ships and 9 U.S. Navy Radar Picket ships during 92 diffobservations taken in the Pacific Ocean from 3 Military Sea Transport Service ships and 9 U.S. Navy Radar Picket ships during 92 different trips.

His research focuses on understanding the interactions of ice, ocean and climate, in particular using imaging radar observations from satellites and airplanes to determine how the ice sheets in Antarctica, Greenland and Patagonia will respond to climate change and affect global sea level.

Envisat, launched in 2002, was a state - of - the - art observation platform bristling with instrumentation including imaging radar, spectrometers, and atmospheric sensors.