distance interval, draw a line which is at a right angle to the straight line. Continue this process

at each one-kilometer/one-mile interval for the entire straight line.

(3) Step 3 - Determine the required Fresnel zone clearance from the transmitting to

the receiving station by using the following formula:

Where:

C = Fresnel zone clearance in meters or feet

d1 = Distance from transmitting antenna to obstacle in kilometers or miles

d2 = Distance from obstacle to receive antenna in kilometers or miles

f = Frequency GHz

D = Total path distance in kilometers or miles between the two sites

(4) Step 4 - Using the elevation scale on the left margin of the graph paper for

reference, place a dot on the line which was drawn at a right angle to the straight line

corresponding to the required Fresnel zone clearance.

(5) Step 5 - Determine the required Fresnel zone clearance for each of the successive

right angle lines using the above formula.

(6) Step 6 - Place dots representing required Fresnel zone clearance for each

successive right angle line.

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