Flashcards in Lesson 308 Radar Imagery Theory Deck (17):
What does the acronym RADAR mean?
Radio detection and ranging
What principle is RADAR based on?
RADAR is based on the idea of reflected energy. The stronger the reflected signal, the larger the particle.
List the 5 components of a RADAR system.
What do the abbreviations PPI and CAPPI stand for?
Plan Position Indicator
Constant Altitude Plan Position Indicator
What are Echo Tops?
A representation of the highest altitude where detectable precipitation is observed.
The distance from crest to crest or trough trough in a wave train.
The path that the wave travels in one wavelength is called a cycle and the number of cycles in a given unit of time (1 second) is called the frequency.
Normal RADAR energy refracted with the earth's curvature approximately 4/3 that of the earth.
List in order the reflective capabilities of hydrometeors.
Large hail >80% of wavelength
Small hail <20% of wavelength
Define Attenuation and list the three types
A lessening of the concentration of energy per unit volume of the beam.
Absorption by atmospheric gases
Misrepresentations of the target in any of its parameters.
What are the 3 distortions due to RADAR design?
What are the 4 distortions due to propagation characteristics?
What are extraneous echoes?
Any echo not derived from clouds or precipitation
What are the 3 types of extraneous echoes?
Second trip echoes
How many RADAR sites are there in Canada and what band and cm wavelength are they?