Troposphere scatter propogation
Frequency range -> 300 MHz to 30000 MHZ
UHF and micro wave signal
used-> high digital links with
1) space craft
2) collision - avoidance radar etc.
FREE SPACE LOSS
In wireless communication the signal disperse with distance.
Therefore, recieving antenna of fixed area receives less signal power from transmited power.
Ratio of the transmitted signal power (pt) to the recieved sigal power (pr) by the antenna
in freespace is also known as free space loss.
