Kongsberg Seatex RADius 1000, Техническое описание

Страница: 17 / 26

Kongsberg Seatex RADius Technical description, rev 0
7
3.2.1 Distance and bearing determination
Figure 3 Relative distance and bearing
The RADius Interrogator measures distance and bearing to the transponders. It can operate on
one transponder alone or up to five simultaneously. The ability to track several transponders
simultaneously increases the integrity capability and the robustness of the system.
Figure 4 RADius principle
Interrogator
Transponder #1
bearing
Transponder #3
Transponder #2
distance
Distance = ½ • F
b
/F
s
• Ts • c
Velocity = ½ • D • L
Transmitted signal
time
fr
eque
nc
y
Transponder
Reflected signal
time
fr
eq
ue
nc
y
F
b
– beat frequency