Publication:
Measurement of surface layer turbulence above AMOS

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Authors
Mattingly, Timothy Scott
Subjects
Atmospheric optical turbulence
Spatial coherence length
Wind profile
Short and long term exposures
Advisors
Walters, Donald L.
Date of Issue
1991-12
Date
December 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Temperature fluctuations in the atmosphere severely limit the angular resolution of earth bound observation facilities to around 1 arcsecond. This corresponds to an effective, coherent, aperture size of 10 cm even though the telescope may have a 2-4 m primary mirror. Understanding the spatial and temporal distribution of atmospheric optical turbulence is essential to maximize the performance of large astronomical telescopes. This thesis made use of a 5 KHz high frequency, short range Doppler acoustic sounder to investigate the first 100 meters of the mountain boundary layer turbulence above the Air Force Maui Observation Site, AMOS, Haleakala, Hi. These measurements were part of a coordinated site evaluation for a proposed 4 m telescope to be built at AMOS in the near future. Tentative results revealed significant layering, 15-20 m and occasionally thicker, in the turbulent surface layers above AMOS. Additionally, a comparison of two proposed construction sites near the top of Haleakala showed that the turbulent surface layer tends to follow the contours of the mountain.
Type
Thesis
Description
Series/Report No
Department
Department of Physics
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
114 p.: ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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