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Showing 1 to 20 of 85 for “"Atmospheric turbulence"”.
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Drag considerations for flight in atmospheric turbulence
… be determined with consideration of the expected atmospheric turbulence.
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Statistical analysis of low level atmospheric turbulence
Statistical properties of wind turbulence data measured with Model 1080 total vector anemometer and Model 1296 dual split-film probe manufactured by Thermo-Systems Incorporated have been calculated. The time series was divided into a certain number of data blocks depending on the lowest frequency …
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Passenger comfort during formation flight within atmospheric turbulence
… due to the formation flying through free air turbulence was considered in this study. In an attempt to approximately ascertain the increase in discomfort, a simple formation flight aerodynamic model for two aircraft in formation was developed. The wing trailing vortices were assumed to shift …
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Structure of atmospheric turbulence in the surface layer
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1964.
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Terahertz wireless communication through atmospheric atmospheric turbulence and rain
… is mainly studied under propagation through atmospheric turbulence and rain. However, as real outdoor weather conditions are temporally and spatially varying, it is difficult to obtain reproducible atmospheric conditions to verify results of independent measurements making it a challenge to …
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Response of Flight Vehicles to Nonstationary Random Atmospheric Turbulence
Made available in DSpace on 2015-05-12T22:35:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7121142.PDF: 3660682 bytes, checksum: c4e0c9d57d491c7a10d7b65253b7e506 (MD5) Previous issue date: 1971
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Investigations of atmospheric turbulence with radar and thermodynamic soundings
… Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Detection Statistics Of Multiple-Pulse Optical Signals Through Atmospheric Turbulence
… intensity modulation and direct detection. Atmospheric turbulence, which is fluctuations in the atmosphere's optical index of refraction, is a hindrance to optical wireless communications because of the signal fades, called scintillation, it causes at the optical receiver. In order to …
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Bidirectional adaptive optics architectures for optical communication through atmospheric turbulence
… the deleterious effects of clear-weather turbulence, namely beam spread, beam wander, angle-of-arrival spread, and scintillation, which leads to low end-to-end power transfer from the transmitter to receiver. Decreases in the power transfer result in lower communication rates and may …
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An investigation of the power spectral density of atmospheric turbulence
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Aeronautical Engineering, 1950.
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Minimization of Atmospheric Turbulence Effects on High-Resolution Synthetic Aperture Systems
Made available in DSpace on 2014-12-08T22:23:22Z (GMT). No. of bitstreams: 1 6406044.pdf: 1945073 bytes, checksum: fc088d87e2ffa6fa0da3d0d9060304e0 (MD5) Previous issue date: 1963
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Effects Of Atmospheric Turbulence On The Propagation Of Flattened Gaussian Optical Beams
… flattened Gaussian beam as it propagates through atmospheric turbulence, and the resulting effects upon the scintillation of the beam and upon beam wander are determined. A comparison of these results is made with the like effects on a standard TEM00 Gaussian beam. The theoretical results are …
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Effect of Atmospheric Turbulence on the Stability of a Lifting Rotor Blade
Made available in DSpace on 2014-12-14T04:42:04Z (GMT). No. of bitstreams: 1 7913462.pdf: 5085765 bytes, checksum: 49308d73cbc220c4c3d9e0a153fdd0b8 (MD5) Previous issue date: 1978
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The effects of atmospheric turbulence on fuel consumption in extended formation flight
… of fuel savings. In a realistic environment, atmospheric turbulence will continuously perturb the formation’s aircraft and their wakes. As a result, each aircraft in the formation will experience fluctuations in aerodynamic loads. For an aircraft to maintain accurately its position within a …
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Real-time simulation of full-field atmospheric turbulence for a piloted rotorcraft simulator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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An evaluation of the three-dimensional split-film anemometer for measurement of atmospheric turbulence
… was evaluated for use in the measurement of atmospheric turbulence. Calibration constants were obtained and the suggested method of data analysis was evaluated. Changes were made in the second approximation to the T.S.I.-suggested method. A method based on the computation of the sensor yaw …
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An investigation of atmospheric turbulence in the 100-105 km region over Cerro Pachón, Chile
In this study, turbulence activity is measured from 100 to 105 km altitude using a sodium (Na) resonance-fluorescence lidar system. Previous approaches have been limited to altitudes below 100 km due to sparse Na layer density above 97 km. Using the lidar system at the Andes Lidar Observatory in …
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