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Sample Form

Compute Range of
Distant Larger Faster Target

Approaching (on-coming) Targets
Range distant larger faster target
has an equal or greater echo
than a closer target.

Except for Track Time (2), all numbers entered must be whole numbers (no decimal point).

sample form

Sample Form Results

Range of Distant
Larger Faster Target

Ranges Target 2 echo > = close Target 1 echo
during Radar track (Approaching, on-coming, traffic).

stationary RADAR
Track Time (t) 2 seconds
close
Target 1 		distant
Target 2
Speed 45 mph
72 kmh		 55 mph
89 kmh
RCS -- Radar Cross Section (m2)30 m2120 m2
 Distance Between
Target 2 and Target 1
Initial Range from Radar 500 ft
152 m		 682 ft*
208 m*		 182 ft*
55 m*
Ending Range from Radar 368 ft
112 m		 520 ft*
159 m*		 152 ft*
46 m*
* Indicates less than or equal to (<=) value shown.

Initially Target 2 echo greater than Target 1 echo, at Ending Range both target echoes equal.

Possible (max) track time: 7.58 seconds (Target(s) even with Radar)

RCS2/RCS1 = 4
(V1+Vp)(RCS2/RCS1)1/4-Vp = 63.6 mph = 102.4 kmh.

Typical small car average radar cross section is about 30 square meters, typical large car average radar cross section is about 120 square meters.

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Chapter 2.2