S&N TO RWP REVIEW EXAM
QUESTIONS CORRECTLY ANSWERED.
Fading on the majority of the ionospheric circuits is a result of what particular type of fading? - CORRECT
ANSWER Multipath
During the 27-day sunspot cycle, which ionospheric layer experiences the greatest fluctuations in
density? - CORRECT ANSWER F₂
What is the art and science of modifying acquired time-series data for the purposes of analysis or
enhancement? - CORRECT ANSWER Signal Processing
When sudden ionospheric disturbances (SID) occurs, which ionospheric layer is affected the most? -
CORRECT ANSWER D
Which of the following factors will affect the outer limits of the skip zone? - CORRECT ANSWER All of the
choices
What converts a finite list of equally-spaced samples of a function into the list of coefficients of a finite
combination of complex sinusoids, ordered by their frequencies, that has those same sample values? -
CORRECT ANSWER Discrete Fourier transform (DFT)
Variations in the ionosphere resulting from changes in the sun's activity are known as - CORRECT
ANSWER Both regular and irregular variations
At what approximate time of day is the density of the ionospheric layers at its lowest level? - CORRECT
ANSWER Just before sunrise
The total distance between two points on earth is 20 miles. What is earth's curvature when surface
refractivity is 250? - CORRECT ANSWER 54.2 mi
QUESTIONS CORRECTLY ANSWERED.
Fading on the majority of the ionospheric circuits is a result of what particular type of fading? - CORRECT
ANSWER Multipath
During the 27-day sunspot cycle, which ionospheric layer experiences the greatest fluctuations in
density? - CORRECT ANSWER F₂
What is the art and science of modifying acquired time-series data for the purposes of analysis or
enhancement? - CORRECT ANSWER Signal Processing
When sudden ionospheric disturbances (SID) occurs, which ionospheric layer is affected the most? -
CORRECT ANSWER D
Which of the following factors will affect the outer limits of the skip zone? - CORRECT ANSWER All of the
choices
What converts a finite list of equally-spaced samples of a function into the list of coefficients of a finite
combination of complex sinusoids, ordered by their frequencies, that has those same sample values? -
CORRECT ANSWER Discrete Fourier transform (DFT)
Variations in the ionosphere resulting from changes in the sun's activity are known as - CORRECT
ANSWER Both regular and irregular variations
At what approximate time of day is the density of the ionospheric layers at its lowest level? - CORRECT
ANSWER Just before sunrise
The total distance between two points on earth is 20 miles. What is earth's curvature when surface
refractivity is 250? - CORRECT ANSWER 54.2 mi
