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The Helicopter Antenna Radiation Prediction Code (HARP)The first nine months effort in the development of a user oriented computer code, referred to as the HARP code, for analyzing the radiation from helicopter antennas is described. The HARP code uses modern computer graphics to aid in the description and display of the helicopter geometry. At low frequencies the helicopter is modeled by polygonal plates, and the method of moments is used to compute the desired patterns. At high frequencies the helicopter is modeled by a composite ellipsoid and flat plates, and computations are made using the geometrical theory of diffraction. The HARP code will provide a user friendly interface, employing modern computer graphics, to aid the user to describe the helicopter geometry, select the method of computation, construct the desired high or low frequency model, and display the results.
Document ID
19900018630
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Klevenow, F. T. (Ohio State Univ. Columbus, OH, United States)
Lynch, B. G. (Ohio State Univ. Columbus, OH, United States)
Newman, E. H. (Ohio State Univ. Columbus, OH, United States)
Rojas, R. G. (Ohio State Univ. Columbus, OH, United States)
Scheick, J. T. (Ohio State Univ. Columbus, OH, United States)
Shamansky, H. T. (Ohio State Univ. Columbus, OH, United States)
Sze, K. Y. (Ohio State Univ. Columbus, OH, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1990
Subject Category
Communications And Radar
Report/Patent Number
NASA-CR-186925
FR-722792-1
NAS 1.26:186925
Accession Number
90N27946
Funding Number(s)
CONTRACT_GRANT: NAG1-1058
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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