INDEX 



205 



radio waves, 52-53 

 transmission factor, 6 

 Power transmission, 15-17 



antenna gain and polarization, 16-17 

 radio gain, 15-16 

 reciprocity principle, 17 

 P-Q method of coverage diagiara con- 

 struction, 132-135 

 path-difference loci construction, 



134-135 

 range loci construction, 133-134 

 Profile method, echo determination, 



193-195 

 Propagation, assumption of standai'd 



conditions, 61-62 

 Propagation, atmospheric considera- 

 tions, 2-4 

 moist standard atmosphere, 3-4 

 nonstandard atmosphere, 4 

 standard atmosphere, 3 

 Propagation, basic relationships, 12-21 

 electric doublet in free space, 12-15 

 power transmission, 15-17 

 radar cross section, 19-20 

 radar gain, 20-21 

 receiver sensitivity, 17-19 

 Propagation, definition, 1 

 Propagation, general characteristics, 

 1-11 

 atmospheric considerations, 2-4 

 basic problems, 2 



radiation field characteristics, 7-8 

 radio gain, 4-5, 8-10 

 transmission factors, 6-7 

 units and symbols used in jjropaga- 

 tion study, 11 

 Propagation aspects of low-angle and 

 surface coverage performance, 

 163-169 

 ducts, effect on set performance, 163 

 low heights, effect on ranges, 163-164 

 maximum range, 163 

 maximum range versus height curves 



164-166 

 performance check before operation, 



166 

 radar cross section of surface craft, 



164 

 ship size estimation, 166 

 Propagation below interference region, 

 radio gain calculation, 91-128 

 curved earth calculations, 92 

 general problem analysis, 91-95 

 graphical solution, dielectric earth 



calculations, 95-108 

 plane earth calculations, 91-92 

 radio gain near line of sight, 115 

 sample calculations for general solu- 

 tion, 116-128 

 sea water calculations, 108-115 



Propagation in interference region, 

 radio gain calculation, 66-91 

 antenna gain and directivity, 69 

 divergence, 68-69 

 factors affecting radio gain, 67-09 

 general solution, 69-70 

 imperfect reflection, 67-68 

 interference, 67 

 plane earth calculations, 70-7 1 

 sample calculations, 79-91 

 spherical earth calculations, 71-78 

 spreading effect, 67 



Quarter-wave dipole antenna, 26-27 



liadar cross section 



aircraft target, 185-1 SO 



characteristic length L, 20 



maximum range calculations, 163 



scattering cross section, 19-20 



scattering parameters, radar cover- 

 age measui-ement, 182 



surface craft, 164 

 Radar cross section, simple forms, 183- 

 185 



circular plate, 183-185 



corner reflector, 185 



cylinders, 183 



flat plates, 183 



rectangular plate, 185 



spheres, 183 

 Radar gain, 5, 20-21 

 Radar planning device for echo deter- 

 mination (RPD), 193 

 Radar receivers, sensitivity, 19 



operator loss, 19 



performance characteristics, 169 



scanning loss, 19 



sweep-speed loss, 19 

 Radar siting 



see Siting, terrain selection and util- 

 ization 

 Radar targets, 182-180 



aircraft, cross section measurement, 

 185-186 



radar cross section of simple forms, 

 183-185 



scattering parameters, coverage 

 measurement, 182-183 

 Radiation 



antenna radiation patterns, 22-23 



antenna radiation resistance, 24 



electric doublet antenna, 12-13 



induction field, 12 



reciprocity principle with reception, 

 17 



resistance, 13 



resistance, half-wave dipole, 26 

 Radiation field 



electric doublet antenna, 12-13 



general nature, 7-8 



half-wave dipole antenna, 25-26 



Radiation field in standard atmosphere, 

 radio gain calculations, 63-67 



field variation, 63-65 



high antenna calculations, 65 



low antenna calculations, 65 



ultra short waves in diffraction re- 

 gion, 65-67 

 Radio gain 



basic equation, 15 



calculation, 60-128 



defined, 4-5, 60-61 



doublet antennas in free space, 5 



radio gain curves, 8-10 

 Radio gain calculations, below inter- 

 ference region, 91-128 



analysis of first mode, 91-94 



effect of linear variation of refractive 

 index of atmosphere, 94-95 



general solution for dipole over a 

 smooth sphere, 116-122 



graphical aids for sea water, v-h-f, 

 vertical polarization, 108-115 



graphs for the case of the dielectric 

 earth, 95-108 



radio gain near the line, 115 



sample calculation for very dry soil, 

 123-128 

 Radio gain calculations, general con- 

 siderations, 60-63 



attenuation factors, 61 



curved-earth geometrical relation- 

 ships, 62 



definition, 60-61 



optical and diffraction regions, 62-63 



standard propagation conditions as- 

 sumed, 61-62 

 Radio gain calculations, in interference 

 region, 67-71 



general solution, 69-70 



plane earth, 70-71 



propagation factors, 67-69 

 Radio gain calculations, in standard 



atmosphere, 63-67 

 Radio gain calculations, optical-inter- 

 ference region, 79-91 



coverage problem, 87-89 



for fixed heights and distance, 82-84 



maximum range vs. receiver height, 

 89-91 



radio gain vs. distance for given an- 

 tenna heights, 85-87 



radio gain vs. receiver height for 

 given distance, 84-85 

 Radio gain calculations, spherical 

 earth, 71-78 



angle determination, 71 



dimensionless coordinates, 77-78 



dimensionless parameters, 75-77 



distance measurement, 71 



divergence factor, 75 



equivalent height, 71 



