TABLE 8
Receiver-Side Algorithm for Obtaining the Navigation Satellite Position and Velocity in the Lunar
Fixed Frame from the Coordinate-Based Parameter Set at Time t
| Operation | Description |
|---|---|
 | Normalize time (t) from reference epoch time (toe) and known validity interval (Δt) |
 | Obtain satellite position in MI frame |
 | Obtain satellite velocity in MI frame |
 | Calculate Euler angles at t for frame transformation |
 | ψ rotation matrix |
 | θ rotation matrix |
 | ϕ rotation matrix |
 | Rotation matrix from MI frame to ME frame |
 | Satellite position in ME frame |
 | Satellite velocity in ME frame |