Satellite Link Budget Calculator
Here’s a comprehensive table summarizing all you need to know about Satellite Link Budget calculations:
| Parameter | Symbol | Unit | Description |
|---|---|---|---|
| Uplink Frequency | f_up | GHz | Frequency used for Earth-to-satellite transmission |
| Downlink Frequency | f_down | GHz | Frequency used for satellite-to-Earth transmission |
| Earth Station Transmit Power | P_TX_ES | dBW | Transmit power of the Earth station |
| Satellite Transmit Power | P_TX_SAT | dBW | Transmit power of the satellite |
| Earth Station Antenna Gain | G_TX_ES | dBi | Gain of the Earth station transmit antenna |
| Satellite Antenna Gain | G_SAT | dBi | Gain of the satellite antenna |
| Earth Station Receiver Gain | G_RX_ES | dBi | Gain of the Earth station receive antenna |
| Free Space Path Loss (Uplink) | L_FS_up | dB | Path loss for the uplink signal |
| Free Space Path Loss (Downlink) | L_FS_down | dB | Path loss for the downlink signal |
| Atmospheric Losses | L_ATM | dB | Signal attenuation due to atmosphere |
| Rain Attenuation | L_RAIN | dB | Signal attenuation due to rain |
| Pointing Losses | L_POINT | dB | Losses due to antenna misalignment |
| System Noise Temperature (Earth) | T_SYS_ES | K | Noise temperature of the Earth station receiver |
| System Noise Temperature (Satellite) | T_SYS_SAT | K | Noise temperature of the satellite receiver |
| Bandwidth | B | Hz | Bandwidth of the communication channel |
| Carrier-to-Noise Ratio (Uplink) | C/N_up | dB | Signal-to-noise ratio for the uplink |
| Carrier-to-Noise Ratio (Downlink) | C/N_down | dB | Signal-to-noise ratio for the downlink |
| Total Carrier-to-Noise Ratio | C/N_total | dB | Overall signal-to-noise ratio of the link |
| Energy per Bit to Noise Density Ratio | Eb/N0 | dB | Measure of signal quality |
| Bit Error Rate | BER | – | Probability of bit errors in digital transmission |