Sentences with phrase «satellite measurement method»

Not exact matches

Alongside field work the team, which included scientists from the WHRC and Boston University, used 12 years of satellite imagery, field measurements and laser remote sensing technology as part of its method.

Bigelow Laboratory for Ocean Sciences researchers have developed a statistical method to quantify important ocean measurements from satellite data, publishing their findings in the journal Global Biogeochemical Cycles.

«Tomography is the most powerful method to get this information, but in the future it will be combined with very sensitive gravity measurements from satellites and maybe electromagnetic sounding, where people do conductivity measurements of the interior,» she said.

«For this campaign, the IMK measurement methods for ground - and satellite - based remote sounding were combined with IMK's aircraft - based in - situ measurement methods,» Matthias Schneider says.

A research team has refined a highly original method for studying ground water based on altitude measurements taken by satellite.

Rosenfeld and his students have developed an aerosol quantification method that uses satellite - based measurements of the infrared light reflected by clouds.

Volcanologists are beginning to use satellite measurements and mathematical methods to forecast eruptions and to better understand how volcanoes work, shows a new article in Frontiers in Earth Science.

Bato and her collaborators are among the first to test whether data assimilation, a method used to incorporate new measurements with a dynamical model, can also be applied in volcano studies to make sense of such satellite data.

Whichever methods are eventually recommended for adoption, Shutler agreed that the satellite - based measurements would need to be accompanied by real - world pH measurements — something that would require the use of accurate sensors.

At the same time, the GRACE gravitational - anomaly satellites, the most accurate method of measurement we have, showed sea level actually falling from 2003 — 2009.

The biggest problem in comparing long - term SL records has been that the tide gauge method of measurement was replaced with satellite altimetry around 1993.

Then in 2003 the launch of two new satellites, ICESat and GRACE, led to vast improvements in one of the methods for mass balance determination, volume change, and introduced the ability to conduct gravimetric measurements of ice sheet mass over time.

First, better calibrations of satellite data and better methods for the optimal combination of earth measurements, satellite estimates, and model outputs may provide a better understanding of precipitation.

Various methods collect data at different scales: Chamber measurements collect data over square - meter areas, tall towers and aircraft observe larger areas, and satellites (e.g., Greenhouse Gases Observing Satellite, or GOSAT) observe areas larger than a square kilometer.

The only comprehensive study of the Antarctic Ice Sheet mass was a 10 + year study based on continuous 24/365 satellite measurements over the period 1993 to 2003, covering 80 % of the AIS with estimates from other methods for the remaining 20 %, which can not be measured by satellites (coastal areas and polar regions).

However, a new study by Garcia - Eidell et al. shows that satellite - based methods produce reasonably accurate measurements of Arctic sea surface salinity from season to season and year to year.

Latest estimates cited by Cazenave et al. are based on a completely different measurement method (satellite altimetry) and scope (all of the ocean except shorelines and polar regions, which can not be captured by satellites).

I think Parker's papers tend to minimize the temperature measurement uncertainties whereas the antithesis would allow for more uncertainties that might put more emphasis on the satellite and SST measurements and better insuring the accuracies and precisions of those methods.

It has been noted by investigators that the algorithms used for adjusting satellite observed SST data has been inconsistent, cloud coverage has limited the adequacy of satellite coverage, and in - situ measurements by VOS and buoy networks has been inadequate with respect to the datasets produced by the Advanced Very High Resolution Radiometers (AVHRR), Cross Product Sea Surface Temperature (CPSST), Non-Linear SST (NLSST), and Multi-Channel Sea Surface Temperature (MCSST) methods.

-- These two distinct satellite systems, using very different measurement methods, produced raw data reaching identical conclusions: sea level is barely rising, if at all.

Special processing of signals received from the Global Positioning System (GPS), a satellite - based navigational tool, has been receiving increased attention recently as a method for measuring water vapor, as it could give long - term measurements of the total column water vapor.

In this paper, we present evidence that this previous method is not sufficiently accurate, and present several alternative methods to optimize these adjustments using information from the satellite measurements themselves.

The new methods result in improved agreement between measurements made by different satellites at the same time.

«new method finds a global - mean land diurnal cycle that peaks later in the afternoon, leading to improved agreement between measurements made by co-orbiting satellites.

So I don't think the trend in PDI is significantly affected by planes - vs - satellites as PDI measurement methods.

Uncertainties should decrease closer to near - current dates (e.g. from denser and more accurate sampling)-- but note that these products also employ different QC and analysis methods, rely to varying degrees on satellite data, on sea - ice data to constrain polar SST, and on bias adjustments for historical changes in measurement methods.

The data back to the start of the satellite measurements (with close to complete coverage of the Antarctica surface) would not have shown statistical trends (by Steig et al methods) and one would have to start 10 or so years after the 1957 historic limit to surface data to obtain one.

The measurement uncertainties alone are so great that Nigel Fox of NPL is proposing an in situ satellite calibration method that would improve the uncertainties ten fold.

While modern satellite - based techniques such as laser altimetery and gravity anomaly measurements provide important information on very recent changes, to get at the longer term we must rely on less direct methods.