Table 1 Symbol definitions.
Parameter | Meaning |
|---|---|
\(D_{{{\text{dir}}}}\) | Satellite landing power |
\(P_{t}\) | Satellite signal transmission power |
\(G_{t}\) | Satellite antenna directional gain |
\(R_{0}\) | The height of the satellite from the ground |
\(L_{t}\) | Transmission loss |
\({\text{EIRP}}\) | Equivalent Isotropic Radiated Power of satellite |
\(A\) | Equivalent area of receiving antenna |
\(\lambda\) | Satellite signal carrier wavelength |
\(G\) | Receiving antenna gain |
\(P_{{{\text{dir}}}}\) | Direct wave signal power |
\(G_{{{\text{proc}}}}\) | Coherent processing gain |
\(P_{{\text{N}}}\) | Receiver noise power |
\(K\) | Boltzmann constant |
\(T\) | Receiver noise temperature |
\(B\) | Receiver bandwidth |
\(F\) | Receiver noise figure |
\({\text{SNR}}_{{{\text{dir}}}}\) | Direct wave signal-to-noise ratio |
\(f\) | Carrier Frequency |
\(D_{{{\text{re}}}}\) | Power density of target echo signal |
\(R\) | Distance from target to receiving antenna |
