Recent advances in theory and observations using passive microwave remote sensing have hightlighted the potential of spaceborne sensors for contributing to the required land surface measurements of soils, vegetation, snow cover and precipitation. Furthermore, the spatial resolution of passive microwave observations matches the special scales of large-scale models of land-atmosphere interactions both for data assimilation and validation. In order to stimulate and focus this research a workshop, sponsored by ESA and NASA, was organized to review the state-of-the-art in microwave radiometry related to land applications and to exchange ideas leading into new directions for future research. This volume contains the refereed papers from the aforementioned ESA/NASA workshop, which are arranged by topic, as well as the (edited) working group reports.
by CRC Press
by CRC Press
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Global and mesoscale modeling and data needs; Large-scale land-atmosphere models and data needs. Mesoscale land-atmosphere models and usefulness of microwave remote-sensing data; Snow cover and snow mass estimates from remote sensing, climatology and the United Kingdom Meteorological Office General Circulation Model; Soil moisture estimation: comparisons between hydrologic model estimates and remotely sensed estimates; Synergism; Sensitivity of active and passive microwave sensors to land parameters; Theory of microwave scattering from vegetation based on the collective scattering effects of discrete scatterers; Synergism of optical and microwave observations for land surface studies; Radiometry at infrared and microwave frequencies; Synergism of active and passive microwave data for estimating bare soil surface moisture; Snow; Intercomparison of snow retrieval algorithms by means of spacebome microwave radiometry; Canadian development and use of snow cover information from passive microwave satellite data; Application of SSMI data for snow cover and climate research; Size parameters of snow grains in scattering and emission models; Monitoring snow cover on the Tibetan Plateau using passive microwave satellite data; Passive microwave remote sensing of snow: volume scattering in snow and parametric inversion of snow parameters with an artificial neural network; Vegetation; Vegetation models and observations; A review; Progress in multi-frequency radiometry of natural objects; Microwave emission from vegetation; Canopy opacity models; Modeling microwave emission from vegetation-covered surfaces: a parametric analysis; Retrieval of geophysical parameters from multifrequency passive microwave measurements over a soybean canopy; Soil moisture; Passive microwave radiation from soil: examples of emission models and observations; Estimation of soil moisture profiles and root zone moisture content by means of microwave radiometry and a priori information; Soil moisture estimation from multifrequency microwave radiometer data based on statistical inversion technique; Retrieval of soil moisture profile by combined remote sensing and modelling; Identification of snowcover using SSMI measurements; Surface temperature; Surface temperature estimation over land using satellite microwave radiometry; Evaporation monitoring over land surface using microwave radiometry; A model for the radio brightness of Northern Prairie; Atmospheric correction and precipitation; Overland precipitation; Theoretical foundations and verification of a multispectral, inversion-type microwave precipitation profile retrieval algorithm; Radiometric correction for atmospheric effects in surface sensing from aircraft and satellites; Instrumentation; The design of the ESA Multifrequency Imaging Microwave Radiometer (MIMR); Working group reports.