Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 128 for “"radiometer"”.
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Seawinds Radiometer Brightness Temperature Calibration And Validation
… allowed the instrument to function as a QuikSCAT Radiometer (QRad) and measure the ocean microwave emissions (brightness temperature, Tb) simultaneously with the backscattered power. When SeaWinds on ADEOS was launched, this same algorithm was applied, but the results were anomalous. The initial …
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Microwave Transmission Measurements Using a Radiometer System
… and characterization of a Total Power Radiometer, operating at Ka-Band. The design of the Total Power Radiometer relies upon several factors including, accuracy, stability, and sensitivity. Weighing these factors leads to the design and simulation of a Total Power Radiometer with 0.1 K …
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Measuring ice accretion with a microwave radiometer.
… problem. The ice accretion sensor is a microwave radiometer which receives the natural thermal emissions of an environment. Ice emits high levels of energy compared to other materials at microwave frequencies making it highly detectable. The harsh measurement environment inside a jet engine has …
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Lidar and infrared radiometer studies of stratocumulus clouds
This thesis comprises a study of marine stratocumulus clouds measured by ground-based Lidar and Infrared RADiometry (or LIRAD). The clouds were measured in northwestern Tasmania in the winter of 1993 and summer of 1995 during the Southern Ocean Cloud Experiment (SOCEX). The study done for this …
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The optical properties of a far infrared radiometer.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1971. M.S.
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High Resolution Acetic Acid Survey and Water Vapor Radiometer
… the map resolution of hot cores. Water vapor radiometers (WVRs) are designed to improve the technique by observing tropospheric water vapor along the lines of sight of interferometers. We have numerically demonstrated the importance of phase correction for interferometric observations and …
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Unidad de Negocios Radiometer: de la estrategia a los resultados
Gematec SRL es una empresa nacional dedicada a la importación y comercialización de productos para el mercado de In Vitro Diagnostics (IVD). Como parte de su estrategia de crecimiento, la empresa decidió crear una Unidad de Negocios exclusiva para una de las marcas con las que trabaja. El objetivo …
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A spaceborne microwave radiometer design for ocean wind remote sensing
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Design and development of an airborne microwave radiometer for atmospheric sensing
… Testbed - K-band (NAST-K) is a passive microwave radiometer operating over approximately 200 MHz bandwidth centered at 23.8 GHz and 31.4 GHz, whose data can be used to find surface water, humidity, and temperature conditions. NAST-K flies along with the existing NAST-M instrument at an altitude of …
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Review of current radiometer technology with suggestions for future South African satellites
… short review of currently available space-faring radiometer technologies and applications, which are then discussed in the context of today's South Africa. For instance Passive Microwave Radiometers (PMR) in the L-Band have huge implications in Soil Moisture (SM) and Sea Salinity (SSS), which in …
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Using a co-located GNSS radio occultation payload for microwave radiometer calibration
… an orbital cross-track scanning microwave radiometer using a co-located radio occultation (RO) instrument with Global Navigation Satellite Systems (GNSS). The radiometer and RO receiver periodically observe the same volume of atmosphere near the earth's limb, allowing for overlapping, or …
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Comparison of model infrared and solar fluxes with aircraft-based radiometer measurements
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmosphere and Planetary Sciences, 1988.
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Detailed thermal analysis of a thin-shell, spherical radiometer in Earth orbit
An.exact energy balance is conducted on a spherical thermal radiation detector. The thermal radiation heat transfer to the spherical detector is computed utilizing models of the surface optical properties that vary with surface temperature, wavelength and angle of incidence. Studies have been …
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A Roughness Correction for Aquarius Ocean Brightness Temperature Using the CONAE MicroWave Radiometer
… sea surface salinity (SSS), using an L-band radiometer that measures ocean brightness temperature (Tb). The application of L-band radiometry to retrieve SSS is a difficult task, and therefore, precise Tb corrections are necessary to obtain accurate measurements. One of the major error sources …
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An observing system simulation experiment for soil moisture measurements from the SMAP radiometer
… satellite, to be launched in 2013, will use both radiometer and radar data to estimate soil moisture. Improved soil moisture knowledge has many applications in hydroclimatology, numerical weather prediction, flood forecasting, and human health. In this thesis, an observing system simulation …
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Hurricane Wind Speed And Rain Rate Retrieval Algorithm For The Stepped Frequency Microwave Radiometer
… from the NOAA, Stepped Frequency Microwave Radiometer (SFMR), which routinely collects data during NOAA hurricane hunter aircraft flights. SFMR measures wind speeds and rain rates at nadir only, but HIRA will soon be integrated with an improved surface wind speed model for expanded …
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Hydrologic data assimilation of multi-resolution microwave radiometer and radar measurements using ensemble smoothing
Previously, the ensemble Kalman filter (EnKF) has been used to estimate soil moisture and related fluxes by merging noisy low frequency microwave observations with forecasts from a conventional though uncertain land surface model (LSM). Here it is argued that soil moisture estimation is a …
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Optical analysis of the ERBE scanning thermistor bolometer radiometer using the Monte Carlo method
… active cavity and scanning thermistor bolometer radiometers are orbiting the Earth to monitor its radiative emission. A numerical model has been formulated to better understand the performance of the ERBE scanning radiometer and to aid future radiometric design and calibration procedures. The …
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Assessing Coastal Plain Wetland Composition using Advanced Spaceborne Thermal Emission and Reflection Radiometer Imagery
… Spaceborne Thermal Emission and Reflection Radiometer (ASTER) to separate wetlands from uplands in a study of 870 locations on the Virginia Coastal Plain. We used the first five bands from each of two ASTER scenes (6 March 2005 and 16 October 2005), covering the visible to the short-wave …
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