## Historical and technical survey |

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Page 147

It will be noted that the vertical scale is nearly 10 times as great as the

scale, causing a marked distortion in angles and crowding of angles above 10

degrees. The lines of constant altitude are parabolas, owing to the curvature of

the ...

It will be noted that the vertical scale is nearly 10 times as great as the

**horizontal**scale, causing a marked distortion in angles and crowding of angles above 10

degrees. The lines of constant altitude are parabolas, owing to the curvature of

the ...

Page 167

The lines GH are parallel to the

an angle y with respect to GH. The incident and reflected rays make the angle y

— 6 with ...

The lines GH are parallel to the

**horizontal**at the antenna. The line CE is**horizontal**at the reflection point and makes an angle 0 with GH. The target is atan angle y with respect to GH. The incident and reflected rays make the angle y

— 6 with ...

Page 193

Adding the phase change *, corresponding to difference in path length, gives the

complete phase change 8 in the form 5 = *+<>=2Aij3-r- + ir (for

polarization) . (3) A Maximum values of the earth gain factor G occur when 5 is an

...

Adding the phase change *, corresponding to difference in path length, gives the

complete phase change 8 in the form 5 = *+<>=2Aij3-r- + ir (for

**horizontal**polarization) . (3) A Maximum values of the earth gain factor G occur when 5 is an

...

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### Common terms and phrases

altitude Anomalous Propagation antenna attenuation azimuth band characteristic values Committee on Propagation computed constant coverage diagram CUDWR curvature curve decibels decrease determine diffraction diffraction region direct distance Division 14 Report duct earth effect elevation equation equipment experiments factor field intensity field strength free space frequency Fresnel zones functions gradient ground height horizontal humidity index of refraction JEIA land layer lobe angles maximum measurements meter method microwave miles mode moisture NDRC nonstandard propagation NRSL obtained operational optical OSRD path difference pattern permanent echoes phase plane plotted polarization problem radar radar cross section Radio Propagation Radio Waves radius range receiver reflection coefficient refractive index region Research signal strength Snell's law standard atmosphere superrefraction target temperature inversion theory tion transmission transmitter trapping Tropospheric variation vertical Wave Propagation Wave Propagation Group wavelength weather X band zone