## Historical and technical survey |

### From inside the book

Results 1-3 of 44

Page 123

The secondary wavelets from the central zone unite into a disturbance whose

the first zone into rings such that the effect of each ring at the point P is equal in ...

The secondary wavelets from the central zone unite into a disturbance whose

**phase**is midway between the center and the rim. This may be shown by dividingthe first zone into rings such that the effect of each ring at the point P is equal in ...

Page 172

Office of Scientific Research and Development. National Defense Research

Committee. Committee on Propagation. 0.02 0.03 0.0 4 tflN RADIANS Figure 72.

Relative magnitude and

for ...

Office of Scientific Research and Development. National Defense Research

Committee. Committee on Propagation. 0.02 0.03 0.0 4 tflN RADIANS Figure 72.

Relative magnitude and

**phase**of the reflected ray. Figure 73. Coverage diagramfor ...

Page 191

Irregularities of the earth's surface which affect the reflection coefficient. If E0 is

the magnitude of the direct wave and F is the magnitude of the reflection

coefficient, then the field strength of the reflected ray is FE0. The

between ...

Irregularities of the earth's surface which affect the reflection coefficient. If E0 is

the magnitude of the direct wave and F is the magnitude of the reflection

coefficient, then the field strength of the reflected ray is FE0. The

**phase**differencebetween ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### 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