## Historical and technical survey |

### From inside the book

Results 1-3 of 32

Page 35

If now we set r = r0 (1 + h/r0) where h = r — r0 and h/r0 is a small quantity and,

furthermore, if we note that with a linear

substituting into (14) and neglecting small quantities of the second order dr, ...

If now we set r = r0 (1 + h/r0) where h = r — r0 and h/r0 is a small quantity and,

furthermore, if we note that with a linear

**gradient**of n no + dhh (15) we obtain onsubstituting into (14) and neglecting small quantities of the second order dr, ...

Page 76

Subsidence is usually strongest in a layer somewhat elevated from the ground,

and when the dry subsiding mass overlies a moist stratum near the ground, a

sharp moisture

Subsidence is usually strongest in a layer somewhat elevated from the ground,

and when the dry subsiding mass overlies a moist stratum near the ground, a

sharp moisture

**gradient**is created which is favorable for the formation of the duct.Page 212

It is seen at once from the diagram that for small values of the moisture lapse an

extremely steep temperature

lower left part of the diagram). In cold air such as is found in the arctic the total ...

It is seen at once from the diagram that for small values of the moisture lapse an

extremely steep temperature

**gradient**is required in order to produce a duct (lower left part of the diagram). In cold air such as is found in the arctic the total ...

### 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