declination
longitude
right ascension
atmospheric attenuation
blind spots
clutter
deflection
deflexure
diffraction
diffusion
dispersion
distortion
false echoes
flection
flexure
ground clutter
scatter
sea clutter
skewness
superrefraction
torsion
bend
bending
refractive
refractory
conductivity
curvature
density
evaporation
gravitation
parallax
polarization
precession
reflexion
relativity
resistivity