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Upper Wind Representation and Flight Planning

Description: 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.
Partner: UNT Libraries Government Documents Department

Evaluation of an Arctic Ice-Free Land Site and Results of C-130 Aircraft Test Landings, Polaris Promontory, North Greenland 1958-1959

Description: Abstract: "Field investigations of an ice-free land area at Polaris Promontory, Hall Land in northwest Greenland were undertaken to determine if this area could support austere military aircraft operations. Detailed scientific observations of geology, meteorology, natural terrain features of the area were made, thorough investigations of the soil features and bearing strength were conducted, and an airstrip was prepared and marked. Successful test landings by a C-130 aircraft were made on the airstrip. Possible alternate airstrip sites were studied and conclusions drawn on the usability of such ice-free land sites for military activities."
Date: March 1961
Creator: Needleman, Stanley M.; Klick, Donald W. & Molineux, Carlton E.
Partner: UNT Libraries Government Documents Department

Investigations of Ice-Free Sites for Aircraft Landings in East Greenland, 1959

Description: Abstract: "Thirty-three specific landing sites were investigated in the ice-free land area of East Greenland between Scores by Sund and Loch Fyne. Eight of these are considered suitable for emergency landings in summer by heavy cargo planes, and several more for light cargo planes. Several sites were investigated for the Royal Greenland Trade Department in the Scorebysund - Kap Tobin area. A 1550-foot airstrip was located on a gravel terrace in the Jaettedal, eight miles northwest of Kap Tobin, and a short strip requiring some construction work was located near Kap Tobin. An 11,500-foot airstrip was tentatively laid out on a gravel terrace at Storelv, near Moskusoksefjord. Utilization of several of these sites can add a significant safety factor to commercial or military aircraft operations in East Greenland. Reconnaissance observations verify the presence of abundant emergency sources of fresh water in East Greenland; analyses of 36 samples indicate water of good to excellent chemical quality."
Date: September 1961
Creator: Hartshorn, Joseph Harold; Stoertz, George E.; Kover, Allan N. & Davis, Stanley N.
Partner: UNT Libraries Government Documents Department

Playa Surface Morphology: Miscellaneous Investigations

Description: 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 (TV) imagery are currently useful.
Date: March 1968
Creator: Neal, James T.
Partner: UNT Libraries Government Documents Department

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

Description: 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.
Partner: UNT Libraries Government Documents Department

Transverse Antenna Feed Study: Final Report

Description: 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.
Partner: UNT Libraries Government Documents Department