LinkOrbitAnalysis:

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   Link analysis.
   The orbit is the spaceraft position in km. Each orbit position must
   have a corresponding Julian day number.
   Modulations are 'BPSK' 'QPSK' 'DE-BPSK' 'DE-QPSK' 'D-BPSK'
   The output is the bit error probability as a function of the orbit
   position.
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   Form:
   LinkOrbitAnalysis (demo)
   bEP = LinkOrbitAnalysis( r, jD, d )
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   ------
   Inputs
   ------
   r      (3,:) Orbit (km)
   jD     (1,:) Julian date (days)
   d      (1,1) Comm data structure
                .fGHz                 (1,1) Frequency (GHz)
                .diameterReceive      (1,1) Receive antenna diameter (m)
                .apertureEfficiency   (1,1) Aperture efficiency
                .polarizationAngle    (1,1) Polarization angle (Deg)
                .attError             (1,1) Average attitude error (deg)
                .latitude             (1,1) Ground station latitude
                .longitude            (1,1) Ground station longitude 
                .altitude             (1,1) Ground station altitude
                .bitRate              (1,1) Bit rate (bps)
                .ampAntennaLoss       (1,1) Antenna loss (dB)
                .beamEdgeLoss         (1,1) Beam edge loss (dB)
                .powerTransmit        (1,1) Transmit power (W)
                .temperatureERX       (1,1) ERX temperature (deg-K)
                .temperatureFeeder    (1,1) Feeder temperature (deg-K)
                .lossFeeder           (1,1) Feeder loss (dB)
                .modulation           (1,:) Modulation e.g. 'D-BPSK';
                .horizonAngle         (1,1) Horizon angle cutoff (rad)

   -------
   Outputs
   -------
   bEP      (1,:)  Bit error probability

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Children:

Common: Coord/LatLonAltToEF
Common: Database/Constant
Common: Graphics/NewFig
Common: Graphics/TitleS
Common: Graphics/XLabelS
Common: Graphics/YLabelS
Common: Math/Mag
Common: Time/Date2JD
Common: Time/JD2T
Link: Coverage/GroundStationVisibility
Link: LinkUtilities/BEP
Link: LinkUtilities/DBSignalToPower
Link: LinkUtilities/FrequencyToWavelength
Link: RF/LossAtmosphericGas
Link: RF/LossPolarization
Link: RF/TAntennaGround
Link: RF/TReceiver
Link: RF/TSky
Orbit: OrbitMechanics/RVOrbGen
SC: BasicOrbit/Period
SC: Ephem/EarthRot