User's Manual

smart microwave sensors GmbH
CONFIDENTIAL AND PROPRIETARY
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2009-02-16 UMRR Documentation_v3 Page 17 of 18 February 16, 2009
8 Co-ordinate System
Figure illustrates the co-ordinate system of a radar system .
- the data are reported in Cartesian co-ordinates.
If sensors are used stand-alone, without the central ecu, they report the targets in a sensor
co-ordinate system which is specified similar to the picture given below.
- The sensor position respresents the origing then
- The sensor pointing direction is equal to the x-axis
- The data are reported in polar co-ordinates.
X (r
X
, v
X
)
Y (r
Y
, v
Y
)
r
r
, v
r
α
Origin
Figure 12: Drawing of co-ordinate system
Variables:
r
X
– range in X-direction
r
Y
– range in Y-direction
v
X
– speed in X-direction
v
Y
– speed in Y-direction
r
r
– range radial
v
r
– speed radial
α – angle