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SUPPORT SITE |
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SUPPORT SITE |
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Path: Link/LinkDesign
% Performs a link analysis for a satellite.
The routine will automatically propagate for a full earth rate/orbit cycle
starting at the JD in the orbit data structure.
Keplerian orbit kinematics are assumed.
You can run a demo by typing LinkAnalysisTool.
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Form:
[gOverT, cOverN0, lRain, lFS, lA] = LinkAnalysisTool( spaceLink, groundLink, orbit )
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Inputs
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spaceLink (1,1) Space link data structure
.theta3DB (1,1) 3 dB antenna angle (deg)
.fIllumination (1,1) Illumination factor (deg)
.effTransmit (1,1) Transmit efficiency;
.powerTransmit (1,1) Transmit power (W)
.lossEdge (1,1) Edge loss (dB)
.lossTransmitterFeed (1,1) Feed loss (dB)
.frequency (1,1) Transmit frequency (GHz)
.diameterAperture (1,1) Aperture diameter (m)
.thetaDepointing (1,1) Pointing error (deg)
groundLink (1,1) Ground link data structure
.latitude (1,1) Latitude (deg)
.longitude (1,1) Longitude (deg)
.altitude (1,1) Altitude (km)
.horizonAngle (1,1) Minimum angle above the horizon
.antenna.type (1,:) Antenna type
.antenna.area (1,1) Antenna area (m^2)
.tGround (1,1) Ambient ground temperature (deg-K)
.tAttenuatorAmbient (1,1) Ambient attenuator temperature (deg-K)
.lossAttenuator (1,1) Attenuator loss (dB)
.lossFeeder (1,1) Feeder loss (dB)
.climateZone (1,1) Climate zone (a-q)
.precipitationFractionOfTime (1,1) Fraction of time with precipitation
.polarizationTiltAngle (1,1) Polarization tilt angle (deg)
orbit (1,1) Orbit data structure
.el (1,6) [a i w W e M] [(km) (rad) (rad) (rad) () (rad)]
.jD (1,1) Epoch (Julian Days)
.t (1,:) Time (sec) from epoch
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Outputs
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gOverT (1,:) g/T (dB)
cOverN0 (1,:) c/N0 (dB)
lRain (1,:) Rain loss (dB)
lA (1,:) Atmospheric gas loss (dB)
lFS (1,:) Free space loss (dB)
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AerospaceUtils: Coord/HorizonAngle AerospaceUtils: Coord/LatLonAltToEF Common: Graphics/Plot2D Common: Graphics/TimeLabl Common: Time/DateStringToJD Common: Time/JD2T Link: LinkUtilities/DBSignal Link: RF/Beamwidth3dB Link: RF/Gain3dB Link: RF/LossAtmosphericGas Link: RF/LossDepointing Link: RF/LossFreeSpace Link: RF/LossPrecipitation Link: RF/TAntennaGround Link: RF/TAttenuator Link: RF/TReceiver Link: RF/TSky Math: Linear/Mag SC: BasicOrbit/Period SC: BasicOrbit/RVFromKepler SC: Ephem/TruEarth
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