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About this book This book deals with both microwave propagation and remote sensing in various atmospheric and tropospheric conditions. By: Pranab Kumar Karmakar. Current promotions.

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Terahertz atmospheric propagation studies in support of wireless remote sensing

More Info. Effects of Climate Change on Birds. Oceans in Decline. Climate Change and Terrestrial Ecosystem Modeling. The Little Ice Age. The Uninhabitable Earth. How to Reduce Your Carbon Footprint. Extreme Conservation. The Paris Climate Agreement. The Fate of Greenland. Forests in Our World. Introduction to Three-Dimensional Climate Modeling. The brightness temperatures are computed using a radiative transfer model based on the discrete-ordinates method. The synthetic reflectivities are generated from a three-dimensional physically based radar simulation.

Comparisons between the brightness temperature and reflectivity fields at matched resolutions appear to be well correlated and may indicate that reflectivity measurements could be combined with brightness temperature observations in order to estimate rainrates. Results of a simulation examining the relationship between surface rainfall rate, reflectivity, and brightness temperature measurements are reported.

The stochastic framework of this study allows the variance of remotely sensed quantities to be described in terms of variations that might occur in realistic precipitation events, and provides a framework for calibrating satellite-based rainfall estimation methods using radar measured refiectivities. Methodology to retrieve and assess the accuracy of atmospheric temperature profiles at the pixel level using satellite sounder data Author s : Keith D.

Hutchison; Kathleen A.

Radio Propagation and Remote Sensing of the Environment

Crean; John B. Lundberg Show Abstract. In this paper, we present the first of a two part discussion to improve the specification of atmospheric transmission calculations using a new methodology to reduce the uncertainty in pixel-level temperature profiles derived from meteorological satellite sounder data. Temperature profiles are examined first, since these data are used to derive the moisture content of the atmosphere.

Our results show that the uncertainty in the specification of temperature profiles, for pixel level retrievals of meteorological satellite sounder data, can be assessed using knowledge on the accuracy of the initial-guess to a physical relaxation algorithm. In this paper, a theoretical study on the remote sounding of maritime atmospheric aerosols MAA from space is made.

First, a simple transfer model of short wave radiation is established, then the criterion of channel selection for a general remote sounding equation is introduced. The channel for sounding an aerosol parameter is selected according to the degree of predominance DP of this parameter.

After that, the DPs of various aerosol parameters are analyzed. The results show 1 it may be difficult to sound total aerosol number, aerosol size distribution parameters and aerosol complex refractive index simultaneously, 2 selecting channel in 0. A compact four-channel microwave scanning radiometer for tropospheric remote sensing is being developed. A pair of For each pair of frequencies it has an offset reflector antenna and a Dicke-switching receiver.

The pair of receivers is assembled in an enclosure, which is mounted on the rotating table of an azimuth mounting and the pair of antennas is connected with the rotating table of an azimuth mounting in the opposite side by a pair of elevation arms. Each antenna is composed of a 90 degree off-set paraboloid and a conical corrugated horn. The dual band humidity receiver is a time sharing type with 0. The dual band temperature receiver is a band sharing type with 0.

The radiometer and observation are controlled by a single chip microcomputer to realize the unattended operation. Walker; R. Crowley; J. Dobrzanski Show Abstract. This paper reflects the progress of the GFO altimeter design, first described by Walker et. The current design takes advantage of advanced RF and digital signal processing technologies to produce an instrument that is both light-weight and reliable. Analysis of the range, waveheight, and backscattering cross section performance indicates that the GFO altimeter will achieve equivalent GEOSAT performance in all areas.

Deriving aerosol properties from satellite: in situ and satellite comparisons Author s : John N. Porter ; Anthony D. Clarke Show Abstract. The ability to derive aerosol properties from satellites is important for climate change studies and atmospheric corrections in studying surface properties. Although aerosols have been measured over land from satellite, it is more feasible to measure them over low surface albedos such as the ocean. One of the uncertainties that must be dealt with is the aerosol phase function, which depends on the aerosol size distribution and the observing wavelength.

Simultaneous use of sonars and radars for the remote sensing of humidity fluctuations in the atmosphere Author s : Vladimir E.

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    It is well known that the directivity patterns of the radio wave scattering by temperature and humidity fluctuations and by the cross correlation of temperature and humidity fluctuations are the same. On the other hand, it has recently been revealed that for a sound wave these directivity patterns as well as the directivity pattern of sound scattering by wind velocity fluctuations are different.

    Remote Sensing and GIS in Environment Management

    This fact allows us to propose new methods for simultaneous measuring the structure parameters for temperature, temperature-humidity, humidity and wind velocity fluctuations. For example, measuring the radio wave backscattering cross section by a clear air radar, and measuring the sound scattering cross section by monostatic and bistatic acoustic sounding at three different scattering angles, we may in principle retrieve these structure parameters.

    Note that now there is no good remote sensing method for measuring the structure parameters for humidity and temperature-humidity fluctuations in the atmosphere. Some problems of practical realization of the proposed methods are considered. Raman lidar measurements of atmospheric properties Author s : C.