Policy: Expert Review
Authority: CCSDS.MOIMS.NAV
OID: 1.3.112.4.X.3
References:
" " | Details | Status | Value | Description and Reference | Nomenclature | isDefault Units/Type | OID |
---|---|---|---|---|---|---|---|
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LVLH | 'LVLH' stands for 'Local Vertical Local Horizontal'. The Z-axis of the LVLH frame is a unit vector collinear and opposite sign of the gravicentric satellite position (planet center, spacecraft gravity center), the Y-axis is a unit vector collinear with but the opposite sign of the orbital kinetic momentum (normal to orbit plane), and the X-axis is the unit vector equal to Y x Z. ![]() |
MTA | N/A | 1.3.112.4.X.3.1 | |
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RSW | A Radial, Along track, Cross track, local orbital coordinate rotating frame, where the R axis always points out from the satellite along the central body's radius vector to the satellite as it moves through the orbit. The S axis is in the direction of (but not necessarily parallel to) the velocity vector and is perpendicular to the radius vector. The W axis is aligned with the orbit angular momentum vector. Note that this RSW frame is also referred to as: Gaussian Coordinate System 'Radial, In-track, Cross-track" (RIC) 'Radial, Transverse, Normal' (RTN) QSW UVW (as employed in Conjunction Data Messages) ![]() |
RSW | N/A | 1.3.112.4.X.3.2 | |
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TNW | A local orbital coordinate Tangential, Normal, Cross track rotating frame that has the x-axis along the Tangential (or velocity) vector, z-axis ("W") along the orbital angular momentum vector, and N completing the right handed system (i.e., for a circular orbit "N" generally points in the Nadir direction and for an eccentric orbit, "N" points as close to Nadir as possible while still being normal to the T-W plane). Note that while this frame has the same axes defined as in the NTW frame, the ordering of axes is different (TNW).![]() |
TNW | N/A | 1.3.112.4.X.3.3 |