## Historical and technical survey |

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Page 129

The power intensity versus v is

corresponding to those in Figure 25 represent the exposure of 1, 2, 3, etc., half-

period zones below M0- The maxima and minima occur a little before these

points ...

The power intensity versus v is

**plotted**in Figure 26, and the points B, C, D, etc.,corresponding to those in Figure 25 represent the exposure of 1, 2, 3, etc., half-

period zones below M0- The maxima and minima occur a little before these

points ...

Page 143

In Figure 45 are

the east is very good and most of the mountains are not visible. To the north the

numerous mountains are unshielded and give rise to many echoes which extend

...

In Figure 45 are

**plotted**the predicted echoes. It will be noted that the shielding tothe east is very good and most of the mountains are not visible. To the north the

numerous mountains are unshielded and give rise to many echoes which extend

...

Page 151

These equations are

) 8 5,280 X 4.92 X d, ' " = °-000OT7 "ST " n = Reading values of ft/ and d\ from

Figure 50 and substituting in the above equations, curves of n and rfi are

in ...

These equations are

**plotted**in Figure 50. From equation (63): 4(ft/)- „ nnnn77 (ft i') 8 5,280 X 4.92 X d, ' " = °-000OT7 "ST " n = Reading values of ft/ and d\ from

Figure 50 and substituting in the above equations, curves of n and rfi are

**plotted**in ...

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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