OLSG Report_Final_06_05_12 - Interagency Operations Advisory ...
OLSG Report_Final_06_05_12 - Interagency Operations Advisory ...
OLSG Report_Final_06_05_12 - Interagency Operations Advisory ...
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Optical Link Study Group (<strong>OLSG</strong>) <strong>Final</strong> <strong>Report</strong><br />
IOAG.T.<strong>OLSG</strong>.20<strong>12</strong>.V1<br />
L1 UPLINK BUDGET<br />
INPUT PARAM ETERS<br />
LINK BUDGET<br />
Slant Range 2.0E+<strong>06</strong> km Tx Ave Power 48.45 dBm<br />
Elevation 20 deg<br />
Tx Antenna Gain<br />
109.66 dBi<br />
TRANSMITTER<br />
Tx Array Gain<br />
9.03 dBi<br />
Tx Wavelength 1.55 µm Tx Transmission Loss -3.47 dB<br />
Tx Ave Power 70.0 W Tx Pointing Loss -1.56 dB<br />
EIRP<br />
132.<strong>12</strong> dBW<br />
Tx Array Size 8 apertures Isotropic Space Loss -324.20 dB<br />
Tx Aperture Diam 0.15 m Atmospheric Loss -3.65 dB<br />
Tx Angular Diam 2.71 arcsec<br />
Tx Footprint Diam 2.63E+04 m Irradiance at rx aperture 1.40E-07 W /m^2<br />
Tx Optical Transmission 45.0 % Rx Antenna Gain 108.74 dBi<br />
Tx Depointing 0.80 arcsec Rx Array Gain 0.00 dB<br />
Rx Transmission Loss<br />
-4.56 dB<br />
ATMOSPHERIC LOSSES Rx Pointing Loss 0.00 dB<br />
Atm Zenith Transmittance 95.0 % Total Optical Path Loss -110.00 dB<br />
Relative Airmass 2.90<br />
Atm Transmission Along LOS 86.2 % Ave Power at Rx Detector -61.54 dBm<br />
Scintillation Loss -3.0 dB<br />
RECEIVER Req. Irradiance at rx aperture 63.0E-09 W/m^2<br />
Rx Aperture Diam 0.14 m Link M argin (Irradiance) 3.46 dB<br />
Rx FOV 5.00 arcsec<br />
Rx Depointing 0.20 arcsec<br />
Rx Optical Transmission 35.0 %<br />
Rx Array Size 1 apertures<br />
Req. Irradiance at rx aperture<br />
63.0E-09 W/m^2<br />
Figure 43: Example uplink budget for the L1 Scenario.<br />
3.6.6 Ground Station Cost<br />
Table 21 provides a cost estimation of the optical ground stations for the L1 Scenario.<br />
Table 21: Ground station costs for the L1 Scenario (k€).<br />
L1 Scenario Ground Station Costs in k€<br />
Tenerife<br />
Hartebeesthoek<br />
Total<br />
Initial Station Investment Costs:<br />
Terminal (telescope, dome, and electronics) 6,230 6,230<br />
Site Facilities Investment Costs (Buildings, Power,<br />
energy, etc.) 1,560 393<br />
Wide Area Communication Investment Costs<br />
(ground comm) 0 <strong>12</strong>42<br />
Weather and Atmospheric monitoring 250 250<br />
Aviation Safety System 350 350<br />
Subtotal Initial Station Investment Costs 8,390 8,465 16,855<br />
Recurring Operating Costs:<br />
Site and Terminal Operating Costs 1,168 1,168<br />
Communication Operating Costs 390 390<br />
Subtotal Recurring Operating Costs 1,558 1,558 3,116<br />
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