Theory of GNSS Reflectometry - GNSS Remote Sensing: Theory, Methods and Applications - page 184

Fig. 8.8 Iso-delay ellipse in the flat-surface approximation

a

received waveform

from GNSS transmitter

receiver

Fresnel zone
specular point

ρ

ρ − τ chip ρ + τ chip

DELAY

specular image

ρ = transmitter−specular point−receiver delay

b

from GNSS transmitter

received waveform

receiver

more power on the trailing edge

glistening zone

ρ − τ chip ρ ρ peak

DELAY

ρ = transmitter−specular point−receiver delay

ρ peak = delay of the waveform's peak

Fig. 8.9 ( a ) Waveform resulting of a specular reflection, corresponding to a C/A or P-like code
(triangular autocorrelation function). ( b ) Conceptual sketch of a waveform resulting from a diffuse
scattering process, corresponding to the same code than the sketch on the top panel