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CRPL Exponential Reference Atmosphere

Description: From Introduction: "In this monograph, the background of the exponential reference atmosphere will be outlined and a set of radio ray tracings presented. These ray may be used for the solution of many problems involving refraction by means of the exponential reference atmosphere."
Date: October 29, 1959
Creator: Bean, B. R. & Thayer, G. D.
Partner: UNT Libraries Government Documents Department

An Investigation of Airborne Radioactivity Anomalies in the Rock Corral Area, San Bernardino County, California

Description: From abstract: The investigation in the Rock Corral area was undertaken to determine the relationship between 1) the anomalously high radioactivity recorded during an airborne survey and 2) the distribution and mineralogic mode of occurrence of radioactive material.
Date: August 1953
Creator: Moxham, Robert Morgan; Walker, George Walton & Baumgardner, Luke H.
Partner: UNT Libraries Government Documents Department

Preliminary Results Obtained With Catalytic Surfaces in the Upper Atmosphere During Balloon Flights

Description: Abstract: Using high altitude balloons,preliminary investigation of recombination rates of atomic particles and free radicals was performed by exposing radiosonde thermistor elements specifically vacuum coated with silver and aluminum oxide. Positive results were obtained by the silver coated thermistor while the coated thermistors showed negative readings as was expected.
Date: December 1958
Creator: Brown, J. A. & Lavin, G I.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress report, April 1 to June 1, 1962

Description: The following report focuses on the study of electrostatic classification of submicron aerosols, with emphasis on particles below 0.1 micron. During the period this work was concerned with detailed studies of the ARF charger, the Whitby ionizer used as a charger or neutralizer, and the high-volume classifier.
Date: 1962
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, August 1 to October 1, 1962

Description: Introduction: "This study is concerned with the classification of submicron aerosols by electrostatic means. The controlled charging of the particles without undue aerosol losses is of principal interest. We are investigating means of eliminating the interference due to the deposition of small and large particles in the same area. The sampler is to be developed to classify atmospheric dust particles at a rate approaching 1 cfm. During the period covered by this report, work was concerned with the charger and with bringing the high-volume classifier into routing operation. Further tests were made on the classification of atmospheric dust."
Date: 1962
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, December 15, 1960 to February 15, 1961

Description: Introduction: "This program is a study of the basic variables that affects electrostatic classification of heterogeneous aerosols of submicron size, especially below 0.1 micron. The variables of concern are particle size, concentration, composition, shape, and initial charge. During this period optimum charger design was studied. The results will serve as a basis for a systematic study of particle charging. A number of improvements were incorporated into the classifier flow system and electrical circuits. The technique for photographing deposits in the electron microscope was also improved, and sample photographs are included."
Date: 1961
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, February 1 to March 31, 1962

Description: Introduction: "This project is a study of eletrostatic classification of submicron aerosols with emphasis on particles below 0.1[mu]. Previous work has shown that classification of particles between 0.1 to 1.0[mu] is feasible by this process. Further improvements along this line include the elimination of interference from initial aerosol charge and increase in sampling rate. The effect of heavy deposits on collection have to be established. More information is desired on the charging regime below 0.1[mu]. Also the overlap of the smallest particles with the larger ones has to be eliminated. It is also of interest to study the possibility of measuring the current due to the precipitating particles. This would make it possible to automate the device. During this period project work was initiated again. There was some delay in finalizing the contract and the laboratory work was not started until early in March."
Date: 1962
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, February 15 to April 15, 1961

Description: Introduction: "This program is a study of the basic variables that affect electrostatic classifications of heterogeneous aerosols of submicron size, especially below 0.1 micron. The variables of interest are particle size, concentration, composition, shape, an initial charge. During this period emphasis was placed on studying and controlling initial charge. A new technique was developed for collecting light and electron microscope samples. Further improvements of the charging device were studied."
Date: 1961
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, April 15 to June 15, 1961

Description: Abstract: "This program is a study of the basic variables that affect electrostatic classification of heterogeneous aerosols of submicron size,especially below 0.1[mu]. The variables of interest are particle size, concentration, composition, shape, and initial charge. During this period research was concerned with classifying particles as small as 0.01[mu]. This research included work on an aerosol generator for monodispersed 0.015-[mu] gold particles. The performance of the charger was further improved by studying its basic electrical characteristics. Tests with the electrostatic classifier showed very clearly the interference due to the stabilizer material associated with polystyrene latex suspensions. These suspensions are used to produce monodispersed aerosols for calibration."
Date: 1961
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, October 15 to December 15, 1960

Description: From introduction: "This study is concerned with the basic variables that affect the electrostatic classification of heterogeneous aerosols in the submicron range, especially below 0.1 micron. The variables of interest are particle size, concentration, composition, dielectric constant, shape, and initial charge as they relate to rate of charging and therefore to the point of deposition in the classifier."
Date: 1960
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, October 1 to December 1, 1962

Description: Introduction: "One of the major objectives of this study is to develop a routine charger that has no aerosol losses. Also, the interference due to deposition of small and large particles in the same area must be overcome. During this period efforts were concentrated on the former problem, which is the key to practical application of this device."
Date: 1962
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Progress Report, June 1 to August 1, 1962

Description: Introduction: "This project is a study of electrostatic classification of submicron aerosols, with emphasis on particles smaller than 0.1 micron. The overlap of the smallest particles with the larger ones is of principal concern. Also, a faster sampling rate is desired, i.e., heavier deposits in a shorter time are necessary. During the period covered by this report, work was concerned with studies of charging by corona and diffusion, neutralization of initial charge, and classification of various types if aerosols."
Date: 1962
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Electrostatic Classification of Submicron Airborne Particles : Final Report, August 16, 1961 to January 31, 1963

Description: From abstract: "This project was a study of electrostatic classification of submicron aerosols. Classification of particles as small as 0.006-[mu]-diameter was shown to be feasible, and good classification of atmospheric dust was achieved. However, a practical solution to the problem of overlapping between particles larger and smaller than 0.1 [mu], the point of minimum electric mobility, was not found."
Date: January 31, 1963
Creator: Langer, G.
Partner: UNT Libraries Government Documents Department

Standard atmosphere - tables and data

Description: Detailed tables of pressures and densities are given for altitudes up to 20,000 meters and to 65,000 feet. In addition to the tables the various data pertaining to the standard atmosphere have been compiled in convenient form for ready reference. This report is an extension of NACA-TR-147.
Date: January 1926
Creator: Diehl, Walter S.
Partner: UNT Libraries Government Documents Department

On the Definition of the Standard Atmosphere

Description: "On April 15, 1920, the under Secretary of State for Aeronautics and Aerial Transport decided to adopt as Standard Atmosphere for official airplane tests in France, the atmosphere defined by the following law, known as the Law of the S.T.You.(Technical Section of Aeronautics): From 0 to 11,000 m. - 0=15-0.0065 Z and above 11,000 m. - 0= -56.5 degrees being the temperature in centigrade degrees at altitude Z expressed in meters. For altitude 0 the pressure is 760 mm of mercury. In the magazine "L'Aeronautique" Mr. A. Toussaint has already written at length on the first studies which led to the elaboration of this law. Since that time the results obtained have been confirmed by fuller and more abundant data which have justified the official adoption of the Law of the S.T.Ae" (p. 1).
Date: April 1921
Creator: Grimault, P.
Partner: UNT Libraries Government Documents Department

The Wind Variability of Fall-Out Patterns

Description: The following report investigates part of the variability of the computed fall-out intensity patterns due to the variability of the winds, on the basis of winds from four Pacific shot days. An extreme case from Operation Sandstone is also considered.
Date: March 1956
Creator: Sherman, Leon
Partner: UNT Libraries Government Documents Department

The erosion of meteors and high-speed vehicles in the upper atmosphere

Description: From Summary: "A simple inelastic collision model of meteor-atmosphere interaction is used and analytic relations for velocity, deceleration, size, and relative luminous magnitude of meteors are derived and expressed in dimensionless parametric form. The analysis is compared with available quantitative observations of meteor behavior and it is indicated that a large fraction of the atmospheric bombardment energy is used in eroding meteor material. The erosion from large, high-speed vehicles as they traverse the high-altitude, free-molecule portion of the atmosphere is calculated, on the assumption that the vaporization process is similar to that which occurs for meteors."
Date: March 1957
Creator: Hansen, C. Frederick
Partner: UNT Libraries Government Documents Department

Atmospheric propagation of THz radiation.

Description: In this investigation, we conduct a literature study of the best experimental and theoretical data available for thin and thick atmospheres on THz radiation propagation from 0.1 to 10 THz. We determined that for thick atmospheres no data exists beyond 450 GHz. For thin atmospheres data exists from 0.35 to 1.2 THz. We were successful in using FASE code with the HITRAN database to simulate the THz transmission spectrum for Mauna Kea from 0.1 to 2 THz. Lastly, we successfully measured the THz transmission spectra of laboratory atmospheres at relative humidities of 18 and 27%. In general, we found that an increase in the water content of the atmosphere led to a decrease in the THz transmission. We identified two potential windows in an Albuquerque atmosphere for THz propagation which were the regions from 1.2 to 1.4 THz and 1.4 to 1.6 THz.
Date: November 1, 2005
Creator: Wanke, Michael Clement; Mangan, Michael A. & Foltynowicz, Robert J.
Partner: UNT Libraries Government Documents Department