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Table 1.
Definition of variables.
| Variable | Definition | Variable | Definition |
|---|---|---|---|
| r | Radial distance from the moon center to a point in space where the density is to be calculated (spacecraft position) | rM | Radial distance of the dust source from the center of the moon (source position) |
| α | Colatitude of the spacecraft (measured from the moon north pole) | αM | Colatitude of the source (measured from the moon north pole) |
| β | Eastern longitude of the spacecraft | βM | Eastern longitude of the source |
| v | Particle speed at the spacecraft position | u | Particle speed at the moment of ejection |
| θ | Angle between the particle velocity and position vectors | ψ | Initial angle between the particle velocity and position vectors |
| λ | Azimuth angle of the particle velocity, measured clockwise from local north. | λM | Azimuth angle of the particle initial velocity, measured clockwise from local north. |
| R | Radius of the particle | γ | Rate of dust particle production |
| n | Phase-space density of particles with fixed radius | f | Distribution describing the dust ejection process |
| ζ | Zenith angle of the source symmetry axis | η | Azimuth of the source symmetry axis measured clockwise from local north |
| η* | Auxiliary angle used in the derivation of the expression for the ejection direction distribution in case of a tilted symmetry axis |
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