Reference vectors

• Represent a direction in object space

• Must have reference position

• Defined in SRFs with a linear CS:

  • Celestiocentric, Local Tangent Space Euclidean (LTSE), Local Space Rectangular

• In other cases, defined in Canonical LTSE SRF at the reference location

The “direction” (0,0,1)

depends the

reference location

(p or q)

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