Sentences with phrase «passive microwave measurements»
From the beginning, there were serious concerns within the scientific community (both research and operational) about the viability of passive microwave measurements of ocean surface vector winds, especially in storms and in other areas of rain and large amounts of cloud liquid water.
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In the original configuration of NPOESS, the ocean surface vector wind data record established by QuikSCAT was to be replaced by passive microwave measurements of wind speed and direction by the polarimetric CMIS radiometer.
Kongoli, C., et al. (2015), A snowfall detection algorithm over land utilizing high - frequency passive microwave measurements — Application to ATMS, J. Geophys.
The team then examined a data set of passive microwave measurements from the Defense Meteorological Satellite Program.
WindSat results thus far have not allayed scientists» concerns about passive microwave measurement of ocean vector winds.25
Not exact matches
By the time NASA restarted its passive - microwave measurements in 1978, the hole had vanished.
NASA began taking passive - microwave measurements of sea ice in 1972, using an instrument aboard its Nimbus - 5 satellite.
Guan says this work is the first time that so many spectral bands, including visible, infrared, thermal, and passive and active microwave, and canopy fluorescence measurements have been brought together to look at crops.
Microwave radiometers are a passive measurement technique; that is, they monitor Earth's own heat energy emissions in the 1 - to 200 - gigahertz frequency range.
From an oceanographic perspective, there is a need for vector wind measurements, and many participants noted that surface vector winds from passive microwave did not fulfill the need for climate - quality surface vector winds and for observation of extreme weather events.
Further, some participants asserted that passive microwave vector wind measurements did not constitute a climate data product, whereas the value for climate studies of scatterometry - derived wind measurements has been demonstrated.
The decadal survey SCLP mission is relevant to this ECV, as it would provide passive and active microwave measurements of snow water equivalent.
Some participants expressed concern that a capability for passive microwave precipitation measurements may not emerge in the revised MIS sensor, and they suggested that NPOESS place emphasis on the water cycle (water vapor, liquid water, ice water, and precipitation) when considering MIS requirements, possibly including giant magneto - impedance (GMI) bands.
With MIS delayed until NPOESS C2, there is a need to continue the long (28 - year) climate data record of sea ice extent and concentration collected by passive microwave radiometers; continued scatterometer and altimeter measurements are also required.