The Resource Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs
Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs
Resource Information
The item Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in Internet Archive - Open Library.This item is available to borrow from all library branches.
Resource Information
The item Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in Internet Archive - Open Library.
This item is available to borrow from all library branches.
- Summary
- Compressible flow over a laser turret creates a phase distortion. To gain insight to this problem a model of a hemispherical turret is developed. The flow field is obtained using a second order solution based on Janzen-Rayleigh expansion for the compressible potential flow equation. Contours of constant phase distortion were calculated; results at the critical Mach number are presented and discussed. It was found that the distortion at 0 degree elevation angle was equivalent to a positive lens whereas at 90 degrees the distortion is similar to a negative lens. At 45 degrees the main effect is beam tilting into the wind. For a ratio of beam radius to turret radius equal to 0.5, the focal length at beam elevation angle of 0 degrees is 16.5km. At beam elevation of 54 degrees the beam tilt was found to be 26.5 microradians. Cruise missiles with intercontinental ranges may use celestial navigation which requires precise measurement of angular location of stars. A distorted lens created by the ambient flow field causes an error in measurement. Knowledge of the external aerodynamics is important
- Language
- eng
- Extent
- 1 online resource (35 pages
- Note
-
- Title from cover
- "September 1976"--Cover
- "NPS-69FU76101"--Cover
- Label
- Phase distortion due to airflow over a hemispherical laser turret
- Title
- Phase distortion due to airflow over a hemispherical laser turret
- Statement of responsibility
- by A.E. Fuhs and S.E. Fuhs
- Language
- eng
- Summary
- Compressible flow over a laser turret creates a phase distortion. To gain insight to this problem a model of a hemispherical turret is developed. The flow field is obtained using a second order solution based on Janzen-Rayleigh expansion for the compressible potential flow equation. Contours of constant phase distortion were calculated; results at the critical Mach number are presented and discussed. It was found that the distortion at 0 degree elevation angle was equivalent to a positive lens whereas at 90 degrees the distortion is similar to a negative lens. At 45 degrees the main effect is beam tilting into the wind. For a ratio of beam radius to turret radius equal to 0.5, the focal length at beam elevation angle of 0 degrees is 16.5km. At beam elevation of 54 degrees the beam tilt was found to be 26.5 microradians. Cruise missiles with intercontinental ranges may use celestial navigation which requires precise measurement of angular location of stars. A distorted lens created by the ambient flow field causes an error in measurement. Knowledge of the external aerodynamics is important
- Cataloging source
- AD#
- http://library.link/vocab/creatorName
- Fuhs, Allen E
- Government publication
- federal national government publication
- Illustrations
- illustrations
- Index
- no index present
- Literary form
- non fiction
- Nature of contents
-
- dictionaries
- bibliography
- technical reports
- http://library.link/vocab/relatedWorkOrContributorName
-
- Huhs, Susan E
- Naval Postgraduate School (U.S.)
- http://library.link/vocab/subjectName
-
- Aerodynamics
- Lasers
- Guided missiles
- Type of report
- Technical report; 1976.
- Label
- Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs
- Note
-
- Title from cover
- "September 1976"--Cover
- "NPS-69FU76101"--Cover
- Bibliography note
- Includes bibliographical references (p. 31)
- Color
- black and white
- Dimensions
- unknown
- Extent
- 1 online resource (35 pages
- Form of item
- online
- Governing access note
- "Approved for public release; distribution unlimited"--Cover
- Other physical details
- illustrations)
- Specific material designation
- remote
- Label
- Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs
- Note
-
- Title from cover
- "September 1976"--Cover
- "NPS-69FU76101"--Cover
- Bibliography note
- Includes bibliographical references (p. 31)
- Color
- black and white
- Dimensions
- unknown
- Extent
- 1 online resource (35 pages
- Form of item
- online
- Governing access note
- "Approved for public release; distribution unlimited"--Cover
- Other physical details
- illustrations)
- Specific material designation
- remote
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<div class="citation" vocab="http://schema.org/"><i class="fa fa-external-link-square fa-fw"></i> Data from <span resource="http://link.archive.org/portal/Phase-distortion-due-to-airflow-over-a/-CzcpnsmW0Y/" typeof="Book http://bibfra.me/vocab/lite/Item"><span property="name http://bibfra.me/vocab/lite/label"><a href="http://link.archive.org/portal/Phase-distortion-due-to-airflow-over-a/-CzcpnsmW0Y/">Phase distortion due to airflow over a hemispherical laser turret, by A.E. Fuhs and S.E. Fuhs</a></span> - <span property="potentialAction" typeOf="OrganizeAction"><span property="agent" typeof="LibrarySystem http://library.link/vocab/LibrarySystem" resource="http://link.archive.org/"><span property="name http://bibfra.me/vocab/lite/label"><a property="url" href="http://link.archive.org/">Internet Archive - Open Library</a></span></span></span></span></div>
