ProfileStruct:

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   Return a default profile structure for SailDisturbance.
   Defaults to JD2000 with an equatorial LEO orbit. The sail is set to
   sun-pointing. The rotational fields are empty.

   See SunV1/SunV2 and CEcl2Eq for computing rPlanetH.
   For example,
      [uS,rS] = SunV1( jD );
      p.rPlanetH = CEcl2Eq'*rS*-uS;
   This field is use to compute eclipses for planetary orbits. The vector
   to the planet should be in the heliocentric ecliptic frame.

   Since version 7.
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   Form:
   p = ProfileStruct
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   ------
   Inputs
   ------
   None.

   -------
   Outputs
   -------
   p          (:)     Profile structure with state fields
                 .q           (4,:) ECI to body quaternion
                 .r           (3,:) ECI position vectors
                 .v           (3,:) ECI velocities
                 .jD          (1,:) Julian dates
                 .rPlanetH    (3,:) Vector to planet in heliocentric frame
                 .angle       (n,:) Angles (initialized empty)
                 .axis        (3,n) Axes for angles (empty)
                 .body        (1,n) Body hinge for angle (empty)
                                   
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Children:

Common: General/IsVersionAfter
SC: Ephem/CEcl2Eq
SC: Ephem/QSunPointing
SC: Ephem/SunV2