Target on a Curve
Sample Form
Compute Acceleration and Velocity
for a Target on a Curve
Sample Form
Compute Acceleration and Velocity
for a Target on a Curve
The form below computes accleration and velocity relative to (measured by) radar for a constant speed target on a curve. All entries must be a whole number (no decimal point), omega must be between 0° - 180°, curve radius (Rd) at least 10, Radar Distance off Target Lane must be less than Curve Radius (d < Rc), and Sample Time between 1-2000 ms (0.001 - 2 sec).
Sample Form Results
Target Vehicle on a Curve
| INPUTs | |||||
| Target Speed (V): | 50 | mph | = | 80 | kmh |
| Target Angle on Curve (omega): | 30 | degs | = | 524 | mrad |
| Curve Radius (Rc): | 400 | ft | = | 122 | m |
| Radar Range to Curve (Rd): | 200 | ft | = | 61 | m |
| Radar Distance off Target Lane (d): | 10 | ft | = | 3 | m |
| Radar Sample Time: | 300 | ms | = | 0.3 | sec |
| CALCULATIONs | |||||
| Speed (Vm) relative to radar | 46.7 mph | = | 75.1 kmh | ||
| Radial Acceleration (A) | 13.4 feet / sec2 2.7 mph / 300 ms | = | 4.1 meters / sec2 4.4 kmh / 300 ms | = 0.42 G's | |
| Acceleration (Am) Relative to Radar |
0.98 mph / 300 ms | = | 1.58 kmh / 300 ms | ||
Police Traffic Radar Handbook
Chapter 4.5