User's Manual

GLX-RSS-4 User Manual
Page 12 of 16
• Walking human: 0,75 m
2
(-1,25dBsm)
• Average car: 4 to 8 m
2
(6 to 9 dBsm)
• Average truck: 6 to 10 m
2
(7,78 to 10dBsm)
Average RCS measurement is averaged in reflected angle and time. RCS for
most targets is not constant for all incident and reflected angles and it is not constant
in time as the consequence of the target moving. Typical measurement of radar cross-
section for the standing human in all angles is shown on the picture 6.
Picture 6. RCS measurement for single walking human
To overcome problems with changes of the RCS and signal variations on the
receiver of the radar, RSS-4 is sampling complete field of view many times in the
second to get better reliability of the detection. Variations of the RCS as factor of the
incident angle can't be avoided but in 24GHz band differences of the RCS as the factor
of angle are relatively low and are changed very fast over the angle so this problem is
also avoided with multiple scanning per second and averaging of the results.