1-46.
Which of the following effects may
1-51.
What would be the Nyquist velocity of a
produce anomalous reflectivity returns that
WSR-88D radar operating with a PRF of
have a "baseball bat" appearance?
800?
1.
Solar radiation
2.
Diffraction
3.
Refraction
4.
Ground clutter
1-47.
What is the most important advantage of
Doppler radar over conventional radar?
1.
Doppler radars can produce more
power and higher energy returns
2.
Doppler radars have higher sensitivity
thresholds
3.
Doppler radars provide target motion
and velocity measurements
4.
Doppler radars are easier to maintain
1-48.
What does a Doppler radar actually
measure?
1.
Frequency shifts
2.
Phase shifts
3.
Amplitude shifts
4.
Decibel shifts
1-49.
When a parcel with a true velocity of 50
knots is moving perpendicular to the
WSR-88D antenna beam, what velocity is
computed by the radar?
1.
0 knots
2.
10 knots
3.
25 knots
4.
50 knots
1-50.
Velocity aliasing occurs during which of
the following situations?
1.
A phase shift occurs that is 90° or
larger
2.
A phase shift occurs that is less than
90°
3.
A phase shift occurs that is 180° or
larger
4.
A phase shift occurs that is less than
180°
1.
36.3 knots
2.
41.5 knots
3.
83.0 knots
4.
110.8 knots
1-52.
Which of the following statements best
describes the Doppler Dilemma?
1.
It is the trade-off between radar
frequency and wavelength
2.
It is the trade-off between pulse
volume and power
3.
It is the trade-off where an increase in
PRF increases the maximum
unambiguous velocity but decreases
the maximum unambiguous range
4.
It is the trade-off where an increase in
PRF decreases the maximum
unambiguous velocity but increases
the maximum unambiguous range
1-53.
What is the primary function of the Radar
Data Acquisition (RDA)?
1.
To ensure synchronization between the
receiver and signal processor
2.
To collect returning radar energy to
produce base products
3.
To perform clutter filtering on all
transmitted signals
4.
To display derived products
1-54.
Which of the following radar moments
would be used to evaluate the intensity of
hail?
1.
Reflectivity
2.
Velocity
3.
Spectrum width
4.
All of the above
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