Radar Meteorology Practice Exam

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• In a perfectly efficient radar, how does intensity behave as area increases?
• What effect do higher zenith angles have on the attenuation of a radar beam by gas?
• Which of the following is NOT one of the three types of transmitters?
• How does backscattering cross section behave with increasing size parameters?
• Bugs are associated with what type of ZDR values?
• What two factors determine the attenuation from rain?
• What is the Pulse Repetition Frequency (PRF)?
• In an RHI, Bragg scattering can be used to identify which atmospheric feature?
• How can dwell time be adjusted to compromise between reflectivity and velocity data resolution?
• What does the term "fine line" refer to in meteorological radar?
• What does KDP stand for in radar meteorology?
• What is ZDR typically for prolate hydrometeors?
• What does VAD stand for in meteorology?
• How does the duplexer switch modes during operation?
• What factor contributes to the difference in ZDR between water and ice hydrometeors?
• What is the time range suggested to ensure decorrelation for reflectivity data?
• Which of the following statements is true regarding side lobes?
• Which radar band is most sensitive to Bragg scattering?
• What does the waveguide do in a radar system?
• What is the purpose of the compressor in a radar system?
• What are pulse radars?
• In what frequency range is the S band located?
• Why is decorrelation advantageous for reflectivity but detrimental for velocity data?
• What are the units of Power and Intensity in radar measurements?
• What impact do side lobes have on radar imagery?
• What is typically the result of energy losses in radar systems?
• What is the typical range of decorrelation times needed to reach a correlation coefficient of 0.01?
• True or False: Large hailstones attenuate more than large liquid hydrometeors or water-coated hail.
• What describes how large a scatterer appears to a radar?
• For spherical hydrometeors, what is the approximate value of ZDR?
• What does MPDA stand for in radar meteorology?
• Which transmitter is known for its high power and clean frequency?
• Which of the following parameters is important in determining k^2?
• Which meteorological phenomenon is associated with high spectrum width?
• Why is understanding the composition of hydrometeors important in radar meteorology?
• What does the term 'Rmax' refer to in radar applications?
• How is a simultaneous radar defined?
• What is largely responsible for radar signal attenuation in the W-band?
• What is a typical reflectivity for bugs in clear air scattering?
• What is meant by the "cone of silence" in relation to WSR-88Ds?
• What does the Debye Relaxation Time relate to?
• What is a typical return for Bragg scattering in the S-band?
• How do you calculate the gain across the radar using intensity?
• What is the primary focus of measuring differential reflectivity?
• What is the role of the reflector in radar technology?
• How is directivity defined in radar systems?
• What happens to signal quality as beamwidths decrease in radar systems?
• How does the size of hydrometeors influence spectrum width?
• Water hydrometeors have a larger ZDR than ice hydrometeors when they are what?
• What are clear air returns associated with?
• What can cause arching and system damage in radar hardware?
• What is defined as the standard deviation of the Doppler spectrum?
• Which radar band is least affected by atmospheric attenuation?
• What does the term differential phase shift refer to in radar meteorology?
• Which property affects the scattering behavior of targets in radar measurements?
• What is defined as the ability for a radar to determine whether an object is present?
• What is a characteristic of X-band radar in terms of precipitation detection?
• Why is the concept of polarization important in radar technology?
• Which radar band is most affected by attenuation due to Oxygen?
• What role does antenna directivity play in radar function?
• Smaller beamwidths in radar are associated with what type of resolution and wavelength?
• What two variables predominantly impact the magnitude of attenuation from clouds?
• What is the primary goal of achieving high antenna gain in radar systems?
• What does attenuation account for in terms of radar signals?
• What is the definition of unity gain in radar systems?
• Interference in radar systems is mainly caused by what components?
• What is the main disadvantage of Magnetron transmitters?
• What role does the Minimum Detectable Signal (MDS) play in radar technology?
• What does a greater degree of attenuation indicate about the radar signal?
• What are typical logarithmic gain values for real world radars?
• What factors determine the amount of power returned or scattered by a target?
• Which of the following is a reason KDP can calculate more efficient rainfall rates?
• What is the shape characteristic of multi-trip echoes in comparison to the original scatterer?
• What does the propagation phase shift depend on?
• What is the primary function of the trigger/master clock in radar systems?
• What is the frequency range of the X band?
• What is the Doppler spectrum?
• An anomalous radar artifact with high reflectivity and no velocity is most likely indicative of what?
• How do you find beamwidth in qualitative terms?
• What is the primary function of the Multiple PRF Dealiasing Algorithm?
• What is the function of the dielectric constant in radar?
• What distinguishes coherent radars from incoherent radars?
• What determines the velocity within a three-body scatterer spike?
• Which of the following best describes radar echoes associated with airborne targets?
• Which causes of spectrum width are most likely to be functions of range?
• Why is it essential to consider scattering effects when interpreting radar data?
• What impact do shorter dwell times have on spectral resolution in velocity data?
• What challenge does the Doppler effect present for velocity measurements?
• What is the relative gain at the edge of the radar beam?
• What does MDS stand for in radar terminology?
• What does the frequency of the radiation impact in terms of radar?
• What happens to the radial velocity when there is constructive and destructive interference among scatterers?
• What is the maximum unambiguous range in radar technology?
• Which factor does not influence the spectral resolution of radar data?
• What does a Range Height Indicator (RHI) provide?
• What are continuous wave radars?
• What frequency range does the Ka band cover?
• Which hydrometeor type typically results in negative ZDR values?
• For small hydrometeors, which is more reflective?
• What is typically increased when the radar rotates faster?
• What does the amount of energy scattered in the plane of polarization depend on?
• What is SZ-2 Phase Coding used for in radar?
• Gain for radar is primarily described in terms of what?
• What does the backscattering cross section primarily depend upon?
• What does the 0th Doppler moment represent?
• True or False: ZDR is sensitive to the water phase.
• What does Bragg scattering typically exhibit in reflectivity?
• Through which element does antenna radiation primarily occur?
• Which of the following is NOT a cause of spectrum width?
• What is the most common type of reflector used in radar systems?
• What are some physical limitations to radars that cause energy losses?
• What is the relationship between the size of the waveguide and wavelength?
• Where do radar bands lie in the electromagnetic spectrum?
• What is differential reflectivity (ZDR)?
• How does an antenna transmit radiation?
• What is a characteristic of high ZDR values?
• For oblate hydrometeors, what is the expected ZDR?
• What does decorrelation lead to in reflectivity measurements?
• What kind of power do Solid State transmitters typically operate at?
• Which of the following describes LDR?
• What role does the modulator play in radar operation?
• What is a switched radar in the context of dual polarimetric radar systems?
• Which of the following methods can help account for radar attenuation?
• What happens to reflectivity spikes from Three-Body Scattering as radial extent increases?
• Which of the following is a primary consideration when measuring radar signal attenuation?
• What is meant by ranging in radar technology?
• What is the significance of SNR in evaluating a radar system's performance?
• What aspect does Specific Differential Phase (KDP) primarily measure?
• Which type of vortices can contribute to high spectrum width?
• What type of polarization component does a simultaneous radar emit?
• What does the phase of returned radiation from a stationary target depend on?
• What is defined as 'Time to Independence' in radar meteorology?
• How is k^2 calculated in relation to an antenna system?
• What is a multi-trip echo in radar reflectivity?
• What is the primary reason for choosing S-band for the WSR-88D radar?
• What does gain express in radar technology?
• What is a Constant Altitude PPI (CAPPI)?
• In what scenario would ZDR values be observed to be approximately zero?
• Why is accurate power return essential for reflectivity measurements?
• What is the speed of light in a vacuum?
• What is dwell time in radar meteorology?
• Are side lobes responsible for ground clutter seen in radar imagery?
• What is the main characteristic of Rayleigh scattering?
• What phenomenology does the term "ground clutter" refer to in radar meteorology?
• What can result from Bragg scattering?
• What does RADAR stand for?
• Are the Electric and Magnetic fields always in phase in radar systems?
• What does k^2 measure in an antenna system?
• What effect does increasing the area have on intensity for a perfectly efficient radar?
• Which of the following can lead to the formation of microbursts?
• Why are coaxial cables considered impractical for use in radar systems?
• What type of scattering causes a Three-Body Scatterer Spike?
• What shape do radar beams take as a result of diffraction?
• Do small ice particles or small liquid hydrometeors attenuate radar signals more?
• Which radar band would experience the most attenuation from H2O?
• In radar meteorology, why does backscattering occur?
• What is the main difference between monostatic and bistatic radars?
• In radar meteorology, what effect does humidity have on radar signal attenuation?
• What is the range in wavelengths for EM waves in the radar bands?
• What is the extinction cross section a measure of?
• What process allows for the attenuation of a radar beam through a cloud?
• What are the main causes for side lobes in radar beams?
• Which type of radar is referred to as pulse, coherent, monostatic?
• How do Three Body Scatterer Spikes orient in relation to the hail core?
• Are the Electric and Magnetic fields in radar systems parallel to each other?
• What is the primary function of the transmitter in radar systems?
• What is a major advantage of a simultaneous dual-pol radar?
• What phenomenon is a source of turbulence and wind shear, leading to high spectrum width?
• How is attenuation defined in the context of radar meteorology?
• What does the 2nd Doppler moment indicate?
• What are range aliased data incorrectly placed due to?
• What effect does increasing the radar's range have on detected scattering?
• Are WSR-88Ds classified as simultaneous or switched dual-pol radars?
• What does a duplexer do in radar systems?
• What is one advantage of using a switched dual-pol radar?
• What characterizes a Three-Body Scatterer Spike?
• Which feature can switched dual polarimetry radars measure?
• What two characteristics of the antenna system are addressed by the radar's gain?
• What does LDR stand for in radar meteorology?
• What does higher precipitation strength imply for radar signal attenuation?
• What does the Signal to Noise Ratio (SNR) represent?
• Why must the attenuation coefficient be multiplied by 2 when calculating total intensity reduction?
• What aspect of radar emissions does the orientation of the waveguide affect?
• Which phenomenon is likely to increase near gust front convergence zones?
• What effect does atmospheric pressure have on radar signals?
• In terms of radar gain, what does "losses due to antenna inefficiencies" refer to?
• What influences the decrease of power in multi-body scattering compared to single point scattering?
• Which condition would most likely lead to a false radar echo?
• What is the range in frequencies for EM radiation in the radar bands?
• Logarithmic distribution of power is primarily due to which phenomenon?
• What characterizes cross-polar reception in radar?
• What is the formula for finding Imax, the intensity of the transmitted energy at a point in space?
• Which statement is true for larger hydrometeors regarding reflectivity?
• What is the typical range for pulse duration (PD) in radar?
• The length of a hail spike is dependent on what factor?
• What can be said about the rho_hv values during Bragg scattering?
• What does co-polar refer to in radar meteorology?