1.

Which of the following is true of detection using a coherent dwell?

1. A fluctuating target is required.

2. Detection statistics are the same as for a single pulse.

3. May require less total energy than using a single pulse.

4. Does not require knowledge of target radial velocity.

2.

Which of the following factors does not affect the tracking rate used by a radar?

1. Radar power available for tracking each target with phased-array radar.

2. Number of targets in track.

3. Expected target maneuver capability.

4. Antenna rotation rate for rotating surveillance radar.

3.

What is the clutter radial velocity observed from an aircraft having a horizontal velocity of 300 m/s and viewing an azimuth 30 from the aircraft heading and a depression angle of 15 ?

1. 39 m/s.

2. 251 m/s.

3. 290 m/s.

4. 300 m/s.

4.

A radar has a range resolution of 1.5m, a fixed random range error of 0.3m, and a range bias error of 0.5m. It measures the ranges of two resolved scatterers on a target, with a S/N of 17 dB on each scatterer. What is the 2- ? measurement accuracy of the radial distance between these scatterers?

1. 0.34m.

2. 0.48m.

3. 0.95m.

4. 1.70m.

5.

What is the false-alarm probability for a single observation when the detection threshold is set at 12, relative to the Gaussian background noise level?

1. 10 ^?12.

2. 6.1 10 ^?6.

3. 1.6 ...