This particular site and time of year was chosen by ARM because it offers a high probability of clearsky, and also a wide range of integrated water vapor amounts. To supplement the routine observing capabilities during the WVIOP2000, a powerful array of tools for measuring water vapor was deployed at the SGP Central Facility area. A comprehensive suite of airborne in situ and ground-based remote

Microwave remote sensing from spaceborne instruments plays a fundamental role in several remote sensing applications. A dense spatial and temporal coverage represents the peculiarity of instruments used to perform operational meso-scale earth observations (EO) monitoring. This is the case of radiometer and scatterometer, microwave instruments widely employed to obtain many EO products. Their sp...

A cloud detection algorithm based on ground-based remote sensors has been developed that can differentiate among various atmospheric targets such as ice and water clouds, virga, precipitation, and aerosol layers. Standard cloud type and macrophysical properties are identified by combining polarization lidar, millimeter-wave radar, infrared radiometer, and dual-channel microwave radiometer measu...

This paper reports the results of an experimental campaign carried out in the Central Italy, considering also part of the Tyrrhenian Sea. Integrated precipitable water vapour estimates obtained from measurements of multiple sensors were produced for a period of about one year, with the purpose of validating the corresponding MERIS estimates. The validation is performed both at specific location...

MWR The mission The Microwave Radiometer (MWR) is a twochannel passive radiometer operating at 23.8 and 36.5 GHz based on the Dicke principle. By receiving and analysing the Earth-generated and Earth-reflected radiation at these two frequencies, the instrument will measure the amount of water vapour and liquid water in the atmosphere, within a 20 km-diameter field of view immediately beneath En...

Using a UV Raman Lidar for aerosol extinction, and combining Microwave Radiometer derived Liquid Water Path (LWP) with Multifilter Rotating Shadowband Radiometer derived Cloud Optical depth, to get cloud effective radius (Reff), we observe under certain specialized conditions, clear signatures of the Twomey Aerosol Indirect effect on cloud droplet properties which are consistent with the theore...

We report the performance of the 183 GHz radiometer system for the CSO-JCMT interferometer during the October 1998 run. The phase correction using the radiometers produced the rms phase uctuations by a factor (a factor of ve less in signal loss due to decorrelation) and achieved a corrected rms path length uctuation of 60 m under a moderately good atmospheric condition (2.2 mm of PWV). We also ...

The European Space Agency SMOS (Soil Moisture and Ocean Salinity) mission aims at obtaining global maps of both variables from space for large scale and climatic studies. It uses an L-band microwave interferometric radiometer with aperture synthesis (MIRAS) to measure brightness temperature (TB) emitted by the Earth surface and then compute from it the two geophysical parameters. The retrieval ...

Measurements of the total burden and of the concentration versus altitude profiles of ozone have been made with a ground-based heterodyne radiometer at Pasadena, California. The measurements were made in the 9.5-micrometer wavelength region, where a strong ozone infrared absorption band exists. The radiometer measured solar absorption at selected wavelengths, with a spectral resolution of 0.001...