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Showing 1 to 20 of 21 for “"Earth Radiation Budget"”.
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Next-Generation Earth Radiation Budget Instrument Concepts
… to the research conducted by the Thermal Radiation Group at Virginia Tech. The first research topic involves the development of a method which can properly model the diffraction of radiation as it enters an instrument aperture. The second topic involves the study of a potential …
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Optical and Thermal Radiative Simulation of an Earth Radiation Budget Instrument
… a next-generation instrument for monitoring the Earth radiation budget (ERB) from low Earth orbit. This instrument is called the DEMonstrating the Emerging Technology for measuring the Earth's Radiation (DEMETER) instrument. DEMETER is a candidate to replace the Clouds and Earth's Radiant Energy …
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A Study of Earth Radiation Budget Radiometric Channel Performance and Data Interpretation Protocols
Two aspects of the study of the Earth radiation budget and the effects of clouds on our climate system are considered in this dissertation : instrumentation and data interpretation. Numerical models have been developed to characterize the optical/thermal-radiative behavior, the dynamic …
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A numerical study of equivalence in scanning thermistor bolometer radiometers for earth radiation budget applications
The Earth Radiation Budget Experiment (ERBE) consists of a suite of three scanning and four nonscanning radiometric instruments on each of three satellites which monitor the solar-reflected and Earth-emitted components of the Earth's radiative energy budget. A numerical model has been formulated to …
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Dynamic Electrothermal Model of a Sputtered Thermopile Thermal Radiation Detector for Earth Radiation Budget Applications
The Clouds and the Earth's Radiant Energy System (CERES) is a program sponsored by the National Aeronautics and Space Administration (NASA) aimed at evaluating the global energy balance. Current scanning radiometers used for CERES consist of thin-film thermistor bolometers viewing the Earth through …
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A study of transient heat conduction and thermal noise in an Earth radiation budget radiometer
The suite of three Clouds and Earth’s Radiative Energy System (CERES) radiometers measure the radiation reflected from and emitted by the Earth from Earth orbit. The instruments are based on a two-mirror reflecting telescope which focuses incident radiation on a thermistor bolometer thermal …
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Optical Analysis of a Linear-Array Thermal Radiation Detector for Geostationary Earth Radiation Budget Applications
The Thermal Radiation Group, a laboratory in the Department of Mechanical Engineering at Virginia Polytechnic Institute and State University, is currently working to develop a new technology for thermal radiation detectors. The Group is also studying the viability of replacing current Earth …
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A study of the thermal and optical characteristics of radiometric channels for earth radiation budget applications
An improved dynamic electrothermal model for the Earth Radiation Budget Experiment (ERBE) total, nonscanning channels is formulated. This model is then used to accurately simulate two types of dynamic solar observation: the solar calibration and the so-called pitchover maneuver. Using a second …
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An end-to-end model of the Earth Radiation Budget Experiment (ERBE) Earth-viewing nonscanning radiometric channels
The Earth Radiation Budget Experiment (ERBE) active-cavity radiometers are used to measure the incoming solar, reflected solar, and emitted longwave radiation from the Earth and its atmosphere. The radiometers are carried by the National Aeronautics and Space Administration's Earth Radiation Budget …
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Analytical and Experimental Characterization of a Linear-Array Thermopile Scanning Radiometer for Geo-Synchronous Earth Radiation Budget Applications
The Thermal Radiation Group, a laboratory in the department of Mechanical Engineering at Virginia Polytechnic Institute and State University, is currently working towards the development of a new technology for cavity-based radiometers. The radiometer consists of a 256-element linear-array …
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Dynamic simulation of solar calibration of the total, Earth- viewing channel of the Earth Radiation Budget Experiment (ERBE)
The Earth Radiation Budget Experiment (ERBE) is an operational system of radiometric instruments placed in Earth orbit by the National Aeronautics and Space Administration (NASA). Its purpose is to monitor those components of the Earth radiation budget which influence the weather and climate. The …
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Use of First-Principle Numerical Models to Enhance the Understanding of the Operational Analysis of Space-Based Earth Radiation Budget Instruments
NASA's Clouds and the Earth's Radiant Energy System (CERES) program is a key component of the Earth Observing System (EOS). The CERES Proto-Flight Model (PFM) instrument is to be launched on NASA's Tropical Rainfall Measuring Mission (TRMM) spacecraft in November, 1997. Each CERES instrument will …
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A parametric study of the radiative and optical characteristics of a scanning radiometer for Earth Radiation Budget applications using the Monte-Carlo method
The Earth Radiation Budget Experiment (ERBE) and the Clouds and Earth's Radiant Energy System (CERES) are systems that measure the earth's radiation budget, or the difference between earth-emitted radiation and radiation absorbed from the sun. Both these systems use three scanning radiometers based …
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Thermal Analysis of the Detector in the Radiation Budget Instrument (RBI)
Earth radiation budget instruments are devices designed to study global climate change. These instruments use telescopes embarked on low-earth-orbit satellites to measure Earth emitted and reflected solar radiation. Radiation is sensed as temperature changes caused by radiation absorbed during …
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A New Paradigm for End-to-End Modeling of Radiometric Instrumentation Systems
Earth observing instruments, such as those embarked on the Earth Radiation Budget Experiment (ERBE) and Clouds and the Earth's Radiant Energy System (CERES), have been used to monitor the arriving solar and the upwelling solar reflected and longwave emitted radiation from low Earth orbit for the …
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Experimental Design for Estimating Electro-Thermophysical Properties of a Thermopile Thermal Radiation Detector
As the Earth's atmosphere evolves due to human activity, today's modern industrial society relies significantly on the scientific community to foresee possible atmospheric complications such as the celebrated greenhouse effect. Scientists, in turn, rely on accurate measurements of the Earth …
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Optical analysis of the ERBE scanning thermistor bolometer radiometer using the Monte Carlo method
In 1984, the Earth Radiation Budget Experiment (ERBE) was started by the National Aeronautics and Space Administration (NASA) to provide data to the meteorological community to predict long-term weather and climate trends. Three satellites employing nonscanning active cavity and scanning thermistor …
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Heat Transfer Issues in Thin-Film Thermal Radiation Detectors
The Thermal Radiation Group at Virginia Polytechnic Institute and State University has been working closely with scientists and engineers at NASA's Langley Research Center to develop accurate analytical and numerical models suitable for designing next-generation thin-film thermal radiation …
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Second-Surface Mirror Effects in Thin-Film Absorber Layers
The Thermal Radiation Group at Virginia Polytechnic Institute and State University has been developing analytical and numerical heat transfer models for NASA's Langley Research Center for more than 25 years. Recent versions of these models are being used in the design of the next-generation thermal …
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A Numerical Study of the Sensitivity of Cloudy-Scene Bidirectional Reflectivity Distribution Functions to Variations in Cloud Parameters
… has been to characterize the sensitivity of the earth's shortwave bidirectional reflectivity distribution function (BRDF) to variations in cloud parameters. The BRDF is a remote sensing tool used to predict the flux reflected from a given earth scene from a satellite-based measurement of the …
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