Playa Surface Morphology: Miscellaneous Investigations (open access)

Playa Surface Morphology: Miscellaneous Investigations

Abstract: Numerous environmental processes affect the development and stability of playa (lakebed) surfaces. Of special significance are hydrologic processes that control the amount and flow of both surface and ground water, and climatic variations which in turn influence the hydrology. This report, in six parts, examines some aspects of the playa surface environment. Chapter 1 is an introduction. Chapter 2 describes microrelief changes that developed at Harper Playa, California, following flooding of the playa in 1965-66. Chapter 3 documents a subsurface hydrologic investigation at Rogers Playa, California. The investigation revealed that the piezometric surface has lowered into sand layers beneath the surface, and it may explain why giant desiccation fissures have formed in the surface clays. Chapter 4 describes an investigation of seven Australian playas and suggests that Australia did not undergo a pluvial period like that of the western United States. Chapter 5 describes three kavirs (playas) in northern Iran and indicates that former lakes did exist there, but not to the same extent as in the western United States. Chapter 6 examines the possibilities of observing playa surface changes from satellites, using the present remote sensor technology. It also states that Gemini color photography and high resolution vidicon …
Date: March 1968
Creator: Neal, James T.
System: The UNT Digital Library
Upper Wind Representation and Flight Planning (open access)

Upper Wind Representation and Flight Planning

Abstract: This Survey is divided into four parts: (a) a representation of winds of space and time, which includes a tool for analysis, called the "geostrophic-gradient divider", and the "2-prog" and "4-prog" charts ; (b) flight planning tools: the 4-D plotter and the fixed-speed time-front plotter ; (c) methods of flight planning, including fixed-track flight planning, single-drift flight planning and emphasizing minimal flight planning, and (d) an interpolative system of minimal flight planning. Included are three appendices to do the following: (a) to derive the basic equation of minimal flight planning, to show why time fronts should be drawn omitting the crosswinds, and to show why time fronts prepared from one airspeed can be used on minimal flight paths with another airspeed ; (b) to show the advantage of 4-prog charts or derived 2-prog charts in representing vertical wind shears that are changing with time, and (c) to report on tests of the recommended procedures.
Date: March 1957
Creator: Gringorten, Irving I.
System: The UNT Digital Library
Transverse Antenna Feed Study: Final Report (open access)

Transverse Antenna Feed Study: Final Report

The program described in this final report had as its goal the investigation of the transverse focal region field distributions of a Cassegrain reflector antenna, evolving applicable microwave feed networks, and analysis of antenna system performance behavior as a function of the various feed electrical and physical parameters. (Author)
Date: May 1968
Creator: Martin, R. W.; Smilen, L. I. & Valentino, P.
System: The UNT Digital Library
Cloud Interpretation from Satellite Altitudes (open access)

Cloud Interpretation from Satellite Altitudes

This report is an incomplete study of cloud interpretations from pictures taken by satellite cameras. This study commenced in the Spring of 1960 immediately after the launch of TIROS I.
Date: July 1962
Creator: Conover, John H.
System: The UNT Digital Library
The Structure of Occlusions as Determined from Serial Ascents and Vertically-Directed Radar (open access)

The Structure of Occlusions as Determined from Serial Ascents and Vertically-Directed Radar

This report studies the investigation of the structure of occluded frontal systems, primarily on the mesoscale, through short-interval radiosonde observations and continuous vertically-directed radar data.
Date: January 1964
Creator: Kreitzberg, Carl W.
System: The UNT Digital Library
Worldwide Collection and Evaluation of Earthquake Data: Final Report on Evaluation of 1960 Seismicity (open access)

Worldwide Collection and Evaluation of Earthquake Data: Final Report on Evaluation of 1960 Seismicity

The following report was made to study seismic activity worldwide, primarily in the magnitude range of 5.0 and 6.0, within the year of 1960.
Date: June 1964
Creator: Fisher, Ray L.; Baker, R. G. & Guidroz, R. R.
System: The UNT Digital Library
The Cumulus and Meteorological Events of the Florida Peninsula During a Particular Summertime Period: Cloud Refractive Index Studies IIIA (open access)

The Cumulus and Meteorological Events of the Florida Peninsula During a Particular Summertime Period: Cloud Refractive Index Studies IIIA

The cumulus cloud events of the Florida peninsula that were observed during a 19-day period of photoreconnaissance in August and September 1957 are described and illustrated. The associated meteorological and rainfall events are also described and the intercorrelations among the various observations are pointed out. The study findings revealed that the principal factors governing the cloud and rainfall situations of the different days were (1) the low-level advection of water vapor into the peninsula from the oceanic surroundings, (2) the wind transport, into the heated peninsula from the oceans during the daytime, of pre -existing cumulus populations containing appreciable liquid water, (3) the low-level convergence, and associated updraft motion, engendered by the synoptic situation and the peninsula sea breezes, and (4) the precipitable water content of the lower Florida air mass. (Author)
Date: October 1965
Creator: Plank, Vernon G.
System: The UNT Digital Library