Q. Find the range of the LOS system when the receiving and transmitting antenna heights are 10m and 100m respectively. Take the effective earth radius into consideration.

Light of sight range (LOS) is given by

d= 4.12(√h_t +√h_r ) Km

=4.12(√10 + √100) Km

LOS (d) = 54.24 Km

OR,

LOS (d) =√2r^‘ (√h_t +√h_r )m

=√(2*4/3*r)(√10 +√100) m

=√(2*4/3*6370*10³ )(10+3.162)

= 4121.48*(10+3.162)

=54248.06 m

LOS (d) = 54.24 Km