Download or read book Scaled model Experimental Verification of Computed Performance of a Single Rhombic Antenna and an Array of Two Rhombic Antennas written by L. L. Proctor and published by . This book was released on 1967 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scaled model Measurements on a Nested tandem Array of Four Rhombic Antennas written by E. L. Kilpatrick and published by . This book was released on 1969 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antenna with high gains at low elevation angles are important to long distance HF communication. With application to an 11,070-km circuit between Washington, D.C. and Asmara, Ethiopia, in view, a design for an antenna consisting of four rhombic elements in a nested-tandem configuration was proposed. The overall length of the antenna was 442.8 m (1452.6 ft), the maximum height, 73.2 m (240 ft). Its nominal operating frequency range was from 6 to 19 MHz. Power gain was computed as a function of frequency, elevation angle, and azimuthal direction. Scaled-model measurements, using 200:1 scaling factor, were carried out to verify the computations. Calculations showed the maximum gain to be 26.5 dB at 14.5 MHz at an angle of about 4.5°. The computed performance deteriorated markedly above 18 MHz. The measurements confirmed the computations at the lower frequencies and showed the deterioration in the performance near the upper frequency end to begin at a lower frequency than computer.

Download or read book ESSA Technical Reort IER written by United States. Environmental Science Services Administration and published by . This book was released on 1967 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scaled model Experimental Verification of Computed Performance of a Single Rhombic Antenna and an Array of Two Rhombic Antennas written by L. L. Proctor and published by . This book was released on 1967 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The radiation patterns and gains of two 1/60 scale-model rhombic antennas were measured and compared with computer performance, assuming perfect ground. The antennas evaluated were, a single rhombic and an array of two identical rhombics with horizontal and vertical displacements.

Download or read book ESSA Technical Report ERL written by and published by . This book was released on 1968 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compilation of Reaction Rate Constants Measured in the ESSA Flowing Afterglow System to August 1969 written by Fred Fehsenfeld and published by . This book was released on 1969 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reaction rate constants measured to August, 1969 in the ESSA flowing afterglow system have been compiled and tabulated in this report. The references to original publications are included along with reference to several published reviews on specialized aspects of ion-molecule reactions. Because of the large number of measured rate constants (several hundred) this report should be useful as a reference source and "finding list."

Download or read book Power Gains for Antennas Over Lossy Plane Ground written by Mark T. Ma and published by . This book was released on 1969 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical power-gain formulas for 13 different antenna models above a flat homogeneous lossy ground are derived in terms of frequency, antenna geometrics, and ground constants. The radiation resistance required in the formulation is calculated with an assumed sinusoidal current distribution.

Download or read book Business Service Check List written by and published by . This book was released on 1967 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ESSA Technical Report ERL ITS written by and published by . This book was released on 1969 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Publications of the ESSA Research Laboratories written by and published by . This book was released on 1966 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NOAA Technical Report ERL written by United States. National Oceanic and Atmospheric Administration and published by . This book was released on 1969 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ESSA Technical Report IER ITSA written by and published by . This book was released on 1967 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1968 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theory and Application of Antenna Arrays written by M. T. Ma and published by John Wiley & Sons. This book was released on 1974 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1979 with total page 1504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ITS written by and published by . This book was released on 1969 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: