## Historical and technical survey |

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Page 94

If we take 10 106 (9) as defining the intensity for a transmitter in

get for the ratio of the two l0-(A-A*),lo = IQB)10 = [I - I- " \ T + sin' 2 (10) where B is

the number of decibels by which the actual field exceeds the

If we take 10 106 (9) as defining the intensity for a transmitter in

**free space**, weget for the ratio of the two l0-(A-A*),lo = IQB)10 = [I - I- " \ T + sin' 2 (10) where B is

the number of decibels by which the actual field exceeds the

**free space**value.Page 111

1X\X2 X (xi + x2) The other symbols in the above expressions have the following

meanings: E = field intensity in microvolts per meter, Eo =

intensity in microvolts per meter _ 3 y/bP X 106 X\ + x2 P = radiated power in

watts, ...

1X\X2 X (xi + x2) The other symbols in the above expressions have the following

meanings: E = field intensity in microvolts per meter, Eo =

**free space**fieldintensity in microvolts per meter _ 3 y/bP X 106 X\ + x2 P = radiated power in

watts, ...

Page 177

To determine the maximum

from the test data may be listed along with the site factors from equation (99) or

equation (107). A value of F is then selected which will most nearly fit the test

data ...

To determine the maximum

**free space**range F, the lengths of the lobes obtainedfrom the test data may be listed along with the site factors from equation (99) or

equation (107). A value of F is then selected which will most nearly fit the test

data ...

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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