On The Resolving Power Of Ground Mapping Radar Antennas PDF Download
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| Author | : J. F. McIlvenna |
| Publisher | : |
| Total Pages | : 66 |
| Release | : 1965 |
| Genre | : Aerial photography |
| ISBN | : |
Download On the Resolving Power of Ground Mapping Radar Antennas Book in PDF, ePub and Kindle
The mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
| Author | : J. F. McIlvenna |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1965 |
| Genre | : Aerial photography |
| ISBN | : |
Download On the Resolving Power of Ground Mapping Radar Antennas Book in PDF, ePub and Kindle
The mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
| Author | : J. K. Schindler |
| Publisher | : |
| Total Pages | : 24 |
| Release | : 1965 |
| Genre | : Electromagnetism |
| ISBN | : |
Download The Control of Electromagnetic Scattering by Impedance Loading Book in PDF, ePub and Kindle
| Author | : Y. K. Lim |
| Publisher | : |
| Total Pages | : 14 |
| Release | : 1965 |
| Genre | : Artificial satellites |
| ISBN | : |
Download Satellite Observations of Low-energy Primary Cosmic Ray Nuclei of Charges Z [greater Than Or Equal To] 6 Book in PDF, ePub and Kindle
| Author | : J. L. Poirier |
| Publisher | : |
| Total Pages | : 20 |
| Release | : 1965 |
| Genre | : Chickens |
| ISBN | : |
Download Microwave Measurements of Partially Coherent Fields Book in PDF, ePub and Kindle
| Author | : E. A. Lewis |
| Publisher | : |
| Total Pages | : 50 |
| Release | : 1965 |
| Genre | : Atmospheric electricity |
| ISBN | : |
Download A Method for Estimating Atmospheric Noise Amplitudes and Phase Errors in Quenched High-Q Receiving Circuits Book in PDF, ePub and Kindle
Very narrow-band quenched filters used for studying VLF radio signals differ from conventional narrow-band circuits in that both signal and atmospheric noise impulses cause only brief quasi-sinusoidal outputs instead of a prolonged ringing. The random overlapping of these short noise and signal bursts can cause errors in phase measurements. It is shown that the distribution of phase errors can be calculated from the amplitude distribution of the output noise envelope. The properties of the phase distribution are discussed in detail, the computation required in the general case is illustrated by means of a numerical example. A simple 'time-sequential' method for experimentally obtaining typical amplitude distributions is suggested. (Author).
| Author | : Tapan K. Mukherjee |
| Publisher | : |
| Total Pages | : 16 |
| Release | : 1965 |
| Genre | : Anions |
| ISBN | : |
Download Substituted Perinaphthenyl Anion Radicals Book in PDF, ePub and Kindle
| Author | : John N. Pierce |
| Publisher | : |
| Total Pages | : 38 |
| Release | : 1965 |
| Genre | : Alphabets |
| ISBN | : |
Download Plurality-count Diversity Combining for Fading M-ary Transmissions Book in PDF, ePub and Kindle
The performance of a plurality-count diversity combiner for fading M-ary transmissions is analyzed, and calculated error probabilities are presented graphically for alphabet sizes of 2, 8, and 32. The performance is shown to be within 3 dB of that of an optimum square-law combiner for moderate alphabet sizes when there is no restriction on the allowable number of diversity branches. It is shown that a worthwhile saving in transmitted power can be effected by using nonbinary alphabets with plurality-count combining for the transmission of binary data. The availability of extra information from the combiner for use with error-correction is discussed.
| Author | : R. A. Mapleton |
| Publisher | : |
| Total Pages | : 24 |
| Release | : 1965 |
| Genre | : Electrons |
| ISBN | : |
Download Electron Capture from Atomic Nitrogen and Oxygen by Protons Book in PDF, ePub and Kindle
| Author | : Carl T. Case |
| Publisher | : |
| Total Pages | : 14 |
| Release | : 1965 |
| Genre | : Electromagnetic waves |
| ISBN | : |
Download On Transient Wave Propagation in a Plasma Book in PDF, ePub and Kindle
