713ps6 - PROBLEM SET 6 ECE 713 Spring Quarter 2006...

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PROBLEM SET 6 ECE 713 Spring Quarter 2006 Assigned: May 22nd Quiz: June 2nd Instructor: Joel Johnson Problem 1 (a) Compute and plot versus height between 50 and 300 km the number density of electrons for a Chapman layer in which electrons are lost primarily by recombination. Assume the sun is at zenith, and the peak density is electrons/m 3 at a height of 120 km. Use a scale height appro- priate for the atmosphere below 100 km altitude. (b) Repeat part (a) assuming a solar zenith angle of 45 degrees and using the same N0 constant as in part (a). (c) Verify that your part (b) result follows the appropriate scaling law for zenith angle changes for the point at 120 km height. Problem 2 (a) Using your problem 1(a) results, plot the relative permittivity of the ionosphere versus alti- tude at 4 MHz neglecting loss and magnetic field effects. Useful constants include the mass and charge of an electron, which are kg and C respectively. (b) Use the program ray.m to trace rays in this ionosphere launched from a transmitter at ground level at elevation angles of 50, 40, and 20 degrees. Assume a planar Earth, and plot the rays out to
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This note was uploaded on 10/25/2009 for the course ECE 713 taught by Professor Johnson,j during the Spring '08 term at Ohio State.

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713ps6 - PROBLEM SET 6 ECE 713 Spring Quarter 2006...

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