Ofr

Roll axis 0° cone angle

Figure 9.- Orbiter coordinate system.

Spacecraft object line or look direct ion

225° clock angle +X

Spacecraft object line or look direct ion

225° clock angle +X

74° cone angle

0° clock angle

Canopus position variation

105° cone angle

Figure 10.- Coordinate system for cone and clock angles.

74° cone angle

0° clock angle

Canopus position variation

105° cone angle

Figure 10.- Coordinate system for cone and clock angles.

To Sun C

To Sun C

Figure 11.- Celestial reference set.

the scan platform is shown in figures 12 and 13 and the scan platform FOV is shown in figure 14. The two-degree-of-freedom HGA coordinate system is shown in figure 15 and the HGA FOV constraints are shown in figure 16.

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