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Satellite Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

6

Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Link Equations

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903510

65

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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El Angle 0 10 35 65 90Item Symbol Units Source DL DL DL DL DLFrequency f GHz Input parameter 0.145 0.145 0.145 0.145 0.145Transmitter Power P Watts Input parameter 0.3 0.3 0.3 0.3 0.3Transmitter Power P dBW 10log(P) -5 -5 -5 -5 -5Transmitter Line Loss Ll dBW Input parameter -1 -1 -1 -1 -1Peak Transmit Antenna Gain Gpt dB Input parameter -3.0 -3.0 -3.0 -3.0 -3.0Transmit Antenna Pointing Offset Theta t deg Input parameter 0 0 0 0 0Transmit Antenna Gain Gt dB Gpt+Lpt -4.0 -4.0 -4.0 -4.0 -4.0Eq. Isotropica Radiated Power EIRP dBW P+Ll+Gt -9.23 -9.23 -9.23 -9.23 -9.23Propagation Path Length S km Input parameter 3128 2211 1154 791 725Space Loss Ls dB Eq (13-21) -145.6 -142.6 -136.9 -133.6 -132.9Propagation and Polarization Loss La dB Fig. 13-10 -0.5 -0.5 -0.5 -0.5 -0.5Peak Receive Antenna Gain Grp dBi Eq (13-16) 18.00 18.00 18.00 18.00 18.00Receive Antenna Line Loss Lr dB Input parameter -0.5 -0.5 -0.5 -0.5 -0.5Receive Antenna Gain Gr dB Grp+Lpr 17.5 17.5 17.5 17.5 17.5System Noise Temperature Ts K Table 13-9 552 552 552 552 552Data Rate R bps Input parameter 1,200 1,200 1,200 1,200 1,200Eb/No (1) Eb/No dB Eq (13-11) 32.6 35.591 41.239 44.519 45.276Carrier-to-Noise Density Ratio C/No dB-Hz Eq (13-13) 63.4 66.4 72.0 75.3 76.1Bit Error Rate BER Input parameter 10-5 10-5 10-5 10-5 10-5Required Eb/No (2) Req Eb/No dB-Hz Fig. 13-9 13 13 13 13 13Implimentation Loss (3) dB Estimated -2 -2 -2 -2 -2

Margin dB (1)-(2)+(3) 17.6 20.6 26.2 29.5 30.3

Link Budget

Communications - Link Equations

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

15

Communications - Link Equations

El Angle 0 90 0 10 35 65 90Item Symbol Units Source DL DL DL DL DL DL DLFrequency f GHz Input parameter 0.145 0.145 0.145 0.145 0.145 0.145 0.145Transmitter Power P Watts Input parameter 0.3 0.3 0.3 0.3 0.3 0.3 0.3Transmitter Power P dBW 10log(P) -5 -5 -5 -5 -5 -5 -5Transmitter Line Loss Ll dBW Input parameter -1 -1 -1 -1 -1 -1 -1Peak Transmit Antenna Gain Gpt dB Input parameter -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0Transmit Antenna Pointing Offset Theta t deg Input parameter 0 0 0 0 0 0 0Transmit Antenna Gain Gt dB Gpt+Lpt -4.0 -4.0 -4.0 -4.0 -4.0 -4.0 -4.0Eq. Isotropica Radiated Power EIRP dBW P+Ll+Gt -9.23 -9.23 -9.23 -9.23 -9.23 -9.23 -9.23Propagation Path Length S km Input parameter 3128 725 3128 2211 1154 791 725Space Loss Ls dB Eq (13-21) -145.6 -132.9 -145.6 -142.6 -136.9 -133.6 -132.9Propagation and Polarization Loss La dB Fig. 13-10 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5Peak Receive Antenna Gain Grp dBi Eq (13-16) 18.00 18.00 18.00 18.00 18.00 18.00 18.00Receive Antenna Line Loss Lr dB Input parameter -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5Receive Antenna Gain Gr dB Grp+Lpr 17.5 17.5 17.5 17.5 17.5 17.5 17.5System Noise Temperature Ts K Table 13-9 552 552 552 552 552 552 552Data Rate R bps Input parameter 1200 1200 2,231,812 2,231,812 2,231,812 2,231,812 2,231,812Eb/No (1) Eb/No dB Eq (13-11) 32.6 45.3 -0.1 2.896 8.544 11.824 12.581Carrier-to-Noise Density Ratio C/No dB-Hz Eq (13-13) 63.4 76.1 63.4 66.4 72.0 75.3 76.1Bit Error Rate BER Input parameter 10-5 10-5 10-5 10-5 10-5 10-5 10-5Required Eb/No (2) Req Eb/No dB-Hz Fig. 13-9 13 13 13 13 13 13 13Implimentation Loss (3) dB Estimated -2 -2 -2 -2 -2 -2 -2

Margin dB (1)-(2)+(3) 17.6 30.3 -15.1 -12.1 -6.5 -3.2 -2.4

Link Budget

Introduction to Space Systems and Spacecraft DesignSpace Systems Design

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Communications - Access Schemes

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