EFFECTIVE AREA OF CLOTHED MAN FOR SOLAR RADIATION

• Main Author: BRECKENRIDGE,JOHN R.
• Other Authors: ARMY NATICK LABS MASS
• Format: Text
• Language: English
• Published: 1961
• Subjects: *CLOTHING; HUMAN BODY; PHOTOGRAPHIC ANALYSIS; POSTURE(PHYSIOLOGY); RADIATION EFFECTS; REFLECTION; SUN; Arctic
• Online Access: http://www.dtic.mil/docs/citations/AD0267405; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0267405

The effective, or normal cross-sectional, area in the path of direct sunlight was determined for average-sized men dressed in each of 3 uniforms (standard Arctic, wet-cold, and hot-weather uniforms), and in each of 4 positions (sitting, standing, walking, and prone). Values were obtained by measuring the outlined areas of the men on photographs taken from various directions (front, rear, side, overhead). Front, side, and rear views were taken at camera angles with the horizontal of 15, 30, 45, 60, and 75 degrees,AND OVERHEAD VIEWS WERE TAKEN (camera angle, 90 degrees). The effective area varied regularly with solar angle. The respective curves for the three uniforms were approximately parallel, and some of the values were predicted by interpolation. For a given uniform and position, large changes in solar angle or direction of sunlight (as represented by shift in position of camera) often caused only minor changes in effective area. Mean values were least for a sitting position (0.40 and 0.46 sq m, respectively, for hotweather and Arctic uniforms) and greatest for a walking position (0.62 and 0.79 sq m, respectively for the hot-weather and Arctic uniforms). (Author)