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This report describes the field test portion of a DNA-formulated program for conducting state-of-the-art studies of earth penetrating weapons and their design. The field penetration tests were in a medium with well-defined mechanical properties and they provided a comparison between empirical and theoretical calculations and field test results. This report includes a description of the test site located at the Defense Research Establishment Suffield (DRES), Ralston, Alberta, projectile, instrumentation, test procedures, Test results, data received, and data analysis.

A finite difference Lagrangian code calculation for the firing of an earth penetrator into a soft soil site has been carried out. The penetrator was a 400-lb, 6.5-in. diameter steel projectile with an initial velocity of 500 ft/ sec. The field tests were conducted in July 1974 at the DRES Site in Canada. The penetrator was treated as a ridig body in the code solution. A four-layer idealization of the target site was used.

A statistical data summary of surface weather observation climatology for: Edmonton International Airport Canada. This summary is similar to the Revised Uniform Summary of Surface Weather Observations (RUSSWO), but is based on data collected from limited-duty weather observing stations; i.e., those that weather observations less than 24 hours a day, 7 days a week. The summary is in five parts: 1) Weather conditions and atmospheric phenomena; 2) Surface winds; 3) Ceiling and visibility; 4) Psychrometric summaries; and 5) Pressure summaries. Keywords: Climatology, Weather, Meteorological conditions, Winds, Barometric pressure, Sky cover, Temperature, Relative humidity, Paychrometric data, Visibility, Ceiling, and Limited Surface Observations Climatic Summary(LISOCS)., See also Rept. no. USAFETAC/TN-83/001, AD-A132 186.

A statistical data summary of surface weather observation climatology for: Cold Lake Apt Canada. This summary is similar to the Revised Uniform Summary of Surface Weather Observations (RUSSWO), but is based on data collected from limited-duty weather observing stations; i.e., those that take weather observations less than 24 hours a day, 7 days a week. The summary is in five parts: PART 1, Weather Conditions and Atmospheric Phenomena; PART 2, Surface Winds; PART 3, Ceiling and Visibility; PART 4, Psychrometric Summaries; and PART 5, Pressure Summaries. Note that Part 2, Precipitation, is omitted. See USAFETAC/TN-8 -001 (AD132186), An Aid For Using The Revised Uniform Summary of Surface Weather Observations (RUSSWO), for complete descriptions of contents and instructions for use., See also Rept. no. USAFETAC/TN-83/001, AD-A132 186.

This report is a statistical data summary of surface weather observation climatology for Edmonton IAP Canada. This summary is similar to the Revised Uniform Summary of Surface Weather Observations (RUSSWO), but is based on data collected from limited-duty weather observing stations; i.e., those that take weather observations less than 24 hours a day, 7 days a week. The summary is in five parts: PART A, Weather Conditions and Atmospheric Phenomena; PART C, Surface Winds; PART D, Ceiling and Visibility; PART E, Psychrometric Summaries; and PART F, Pressure Summaries. Keywords: Climatology; Weather; Meteorological Conditions; Winds; Precipitation; Barometric pressure; Sky cover; Temperature; Relative humidity; Psychrometric data; Visibility; Ceiling. (Author)

3" guns - first Anti Aircraft guns to fire on Japanese air raiders.