Search Results

The search returned 1,237 publication(s) on its.ntia.gov.

G. D. Gierhart, Laurance G. Hause, Joseph E. Farrow, and Martin T. Decker, “Insertion Loss of a Brick Wall at UHF,” Technical Report NBS Report 7272, June 1962

Measurements of the effects of inserting a brick wall into a radio propagation path are reported. The technique used for measuring “insertion loss” at frequencies of 518 Mc/s and 1046 Mc/s is described. Distributions of the resulting data indicate t...

G. D. Gierhart, J. S. Miller, M. E. Johnson, and Albrecht P. Barsis, “The Prediction of Service Volumes for Air Navigation Facilities,” Technical Report NBS Report 7238, March 1962

This report deals with the prediction of service volumes (i.e., service ranges in three dimensions) for VOR and TACAN air navigation facilities in the presence of noise and interfering stations. Propagation mechanisms applicable to the frequency ran...

“FY 1961: Seventh Summary of Research at Boulder Laboratories,” Technical Progress Report, January 1962

This report provides information about research projects conducted at the National Bureau of Standards Department of Commerce Boulder Laboratories in FY 1961 by the Cryogenic Engineering Laboratory (CEL) and the Central Radio Propagation Laboratory (...

P. Yoh, “Calculations of Signal-to-Noise Ratios for Solar Radar Echoes,” Technical Report AFCRL 739, July 1961

The radar for computing the signal-to-noise ratio of radar echoes from the sun is outlined in this report. The radial distribution of electron density in the corona, the coronal temperature, solar noise, galactic noise, and radar-system parameters a...

Herman V. Cottony, “Techniques for Accurate Measurement of Antenna Gain,” Circular NBS Circular 598, December 1958

Comparison of published results of experimental antenna measurements, particularly gains, reveals apparent discrepancies of the order of one or more decibels. Experimental work at the National Bureau of Standards on scaled model antennas for long-ra...

Martin T. Decker, “R. F. Attenuation by Building Materials,” Technical Report NBS Report 6003, September 1958

A comparison is made at X-band frequencies of the theoretical and measured transmission and reflection coefficients for a parallel wire grid. The methods used are applicable to the measurement of these factors for various building materials.

Philip L. Rice, Anita G. Longley, and Kenneth Alva Norton, “Prediction of the Cumulative Distribution with Time of Ground Wave and Tropospheric Wave Transmission Loss,” Technical Report NBS Report 5582, June 1958

Part I of this report describes a method for predicting the cumulative distribution with time of transmission loss at frequencies above 10 megacycles per second over paths of arbitrary length. The method makes use of available information about terr...

Vaughn L. Agy, “Bibliography of Arctic Ionospheric Research in the United States and Alaska since 1949,” Bibliography NBS 5561, March 1958

An attempt is made to list as completely as possible the papers and reports dealing with Arctic ionospheric radio propagation which have appeared since 1949. There are three categories into which these works fall: (a) papers in the “open” literature,...

Vaughn L. Agy, “A Study of Auroral Zone Attenuation of High Frequency Radio Waves,” Sponsor Report NBS Report 5090, June 1957

This is the sixth quarterly progress report on a study to obtain quantitative information on the additional attenuation suffered by radio waves traversing the auroral zone. For many years it has been known that ionospheric radio wave propagation in ...

Albrecht P. Barsis, “Long-Distance Tropospheric Propagation Data over Cheyenne Mountain Paths,” Technical Report NBS Report 5072, May 1957

Results of measurements of basin transmission loss over 400 and 600 miles paths are presented in the form of distributions of hourly medians for frequencies in the 100 to 1000 Mc range. The paths extend southeastward from the Front Range of the Colo...

Kenneth Alva Norton, “Fitting an Arbitrary Functional Relationship by Least Squares with all of the Variables Subject to Error,” Technical Report NBS Report 5068, April 1957

A solution is presented in this paper, with all of the variable subject to error, for the general leased squares porblem of determining consistent estimates of the parameters of a functional relationship which is expected to fit exactly the average o...

K. A. Norton, P. L. Rice, and L. E. Vogler, “The Use of Angular Distance in Estimating Transmission Loss and Fading Range for Propagation through a Turbulent Atmosphere over Irregular Terrain,” Conference Paper, October 1955

A discussion is given of the transmission loss expected in free space with various types of antennas, followed by a description of theoretical prediction curves for the transmission loss expected in tropospheric propagation on over-land paths. The B...

A. P. Barsis, B. R. Bean, and K. O. Hornberg, “Cheyenne Mountain Tropospheric Propagation Data February – March 1954,” Technical Report NBS Report 3536, May 1955

This report describes tropospheric propagation measurements taken over the Cheyenne Mountain paths on frequencies between 92 and 1046 Mc during February, 1954. The results of the measurements are given in terms of cumulative distributions of hourly ...

A. P. Barsis, J. W. Herbstreit, and K. O. Hornberg, “Cheyenne Mountain Tropospheric Propagation Experiments,” Circular NBS Circular 554, January 1955

The National Bureau of Standards has established extensive facilities for studies of tropospheric radio-wave propagation in the very-high frequency and ultra-high frequency portion of the frequency spectrum at Cheyenne Mountain, Colorado. These faci...

J. H. Dellinger, “The Great Opportunity,” Technical Report, June 1948

Between the alternatives of a productive and happy future for mankind and the dread prospect of the utter annihilation of painfully won accomplishments of civilization lies only the power of an idea. That idea-international understanding through goo...

Central Radio Propagation Laboratory, “Basic Radio Propagation Predictions for June 1947 Three Months In Advance,” Technical Report CRPL-D-31, March 1947

Basic Radio Propagation Predictions are prepared by the staff of the Central Radio Propagation Laboratory of the National Bureau of Standards under the direction of J. Howard Dellinger, Chief, and Newbern Smith, Assistant Chief. The monthly reports o...

Joint Communications Board, “IRPL Radio Propagation Handbook: Part 1,” Handbook, November 1943

The purpose of this Handbook is to provide a radio operator or a radio communications officer with a working knowledge of the principles underlying the propagation of radio waves from a transmitting antenna to a receiving antenna. This Handbook expl...