8.5.3 STIS Coordinate Systems
STIS is located off-axis in the focal plane of HST. This article shows how the detector reference frame compares to HST's U2, U3 reference frame. |
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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 8.1: STIS Coordinate System
Related Links
8.5.1 STIS Central Wavelengths
8.5.2 STIS Internal Calibration Targets
8.5.4 The Official STIS Aperture List