INDEX 



The subject indexes of all STR volumes are combined in a master index printed in a separate volume, 

 for access to the index volume consult the Army or Navy Agency listed on the reverse of the half-title page. 



Absorption of microwaves, 

 82-90, 222-224 

 atmospheric gases, 89-90 

 rain and hail, 85-88 

 water drops, 222-224 

 Adveetion, definition, 75-76, 212 

 Advective ducts, coastal and maritime 



conditions, 77-78, 213-214 

 Airplane radar cross sections, 83-84 

 Angle-of-arrival measurements, 73-74 

 Antenna patterns for ground radar, 

 162-167 

 earth curvature effect on lobe 



lengths, 166-167 

 factors, 164 



local terrain effects, 164-166 

 reflecting screen, 163 

 vertical patterns, 162, 164 

 Antigua transmission experiments, 



71-73 

 Atmospheric refraction 



see Atmospheric stratification and 

 refraction; Radar errors due to 

 atmospheric refraction 

 Atmospheric stratification and 

 refraction, 75-76, 198-210 

 adveetion, 75-76 

 attenuation, 207 

 convection, 76 



duct, superrefraction, 204-207 

 frictional turbulence, 76 

 measurement of refractive index, 200 

 nocturnal cooling, 75-76 

 operational applications, 208-210 

 origin of refractive index variations, 



198-200 

 rays in stratified atmosphere, 



202-204 

 reflection from elevated layer, 208 

 subsidence, 76 

 temperature inversions, 76 

 types of modified index curves, 202 

 wave picture of guided propagation, 

 207-208 

 Attenuation diagrams for surface ducts, 

 240 



Bending of radio waves, 178-180 

 Bilinear M curve, first mode, 228-232 



completely trapped modes, 232 



depth loss, 231 



leaky modes, 232 



surface barrier strength increase, 231 



undiscovered solution, 231-232 

 Bilinear M curve, second and higher 

 modes, 234-236 



British transmission experiments, 

 58-60 

 Irish Sea experiment, 58-59 

 overland path, 59-60 



Calculations for second and higher 

 modes of bilinear model, 234-236 

 Calibration and testing of ground 



radars, 174-177 

 Canadian transmission experiments, 67 

 Captive balloons and kites, 52 

 Characteristic values for bilinear M 

 curve 



first mode, 228-232 



second and higher modes, 234-236 

 Chronological record of Committee 

 on Propagation activities, 13-24 



1943; 13-14 



1944; 14-20 



1945; 20-24 



Anderson's southwest Pacific 

 Theatre work, 17-21 



program adopted, 15-16 



specific experiments outlined, 14-15 

 Circuit reliability, 222 

 Cloud echoes in radar, 184-185 

 Coastal and maritime conditions, 

 meteorology, 77-78 



adveetion, 77, 213-214 



duct formation, 77-78 

 Contracts and projects, 11-12 



Columbia University, 11 



Combined Chiefs of Staff request, 11 



Humble Oil Company of Texas, 12 



Jam Handy Organization of Detroit, 

 12 



State College of Washington, 1 1 



University of Texas, 12 

 Convection, 212 



Convergence effects in reflections from 

 tropospheric layers, 258-259 



conclusions, 259 



convergence factor, 258-259 



roughness effect, 259 

 Cornu's spiral, 127-128, 131-132 

 Coverage diagram, 190-193 



complex cases, 193 



definition, 190 



magnitude of field intensity, 190-191 



nomographic solutions, 95-105 



simple cases, 191-193 



Diffraction of radio waves, 120-134 

 by terrain, 37-38 

 Cornu's spiral, 127-128, 131-132 

 Fresnel integrals, 125-127 



Fresncl zones, 121-123 

 limitations of Fresnel theory, 



133-134 

 location of maxima and minima, 



129-131 

 multiple slits and obstacles, 133 

 narrow obstacle, 132-133 

 obstacles, 124-125 

 over hills, 110-112 

 Rayleigh criterion, 123-124 

 rectangular slit, 131-132 

 reflection from rough surfaces, 



123-124 

 shoreline, 158, 162 

 straight edge diffraction, 128-129 

 wave propagation, 121 

 Diffraction zone, nonstandard 

 propagation 

 see Nonstandard propagation in 



diffraction zone 

 Divergence factor for reflected wave, 



170 

 Ducts 



characteristics in nonstandard 



propagation, 46-47 

 fades, 220 

 formation, 79 

 over open ocean, 214-215 

 superrefraction, 204-207 

 surface, attenuation diagram, 240 

 Dynamic effects in lower atmosphere 

 fronts, 79 



high pressure area, 79 

 low pressure area, 78-79 

 subsidence, 78-79 



Early warning heightfinding radar, 



106-109 

 Earth curvature effect on radar 



antenna lobe lengths, 166-167 

 Electromagnetic field, 38-41 

 attenuation factor, 41 

 field strength distribution, 38-39 

 modes, 39-41 

 Equipment tests for ground radar, 



174-175 

 Errors in radar due to atmospheric 

 refraction 

 see Radar errors due to atmospheric 

 refraction 



Fading on different wavelengths, 



221.222 

 Fixed echo control, shielding, 137 

 Flat earth lobe angle calculations, 



147-149 



313 



