Phase 2 Proposal Instructions for Cycle 10

10.9 STIS Coordinate System

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Knowledge of the STIS coordinate system relative to the spacecraft coordinate system is necessary to use the POSition TARGet <X-value>, <Y-value> Special Requirement properly. The Figure below shows the sense of the U2 and U3 axes for the various STIS apertures.

Figure 10.1: STIS coordinate system

 

Shown projected onto the sky, as used with the POS TARG Special Requirement