, is defined such that when
= 0, the top of the camera and the top
of pixel A4 point north. The offset between the A and B detectors discussed
in Section 2 is not shown.
Figure 1: Schematic diagram showing the orientation of the BBXRT
detectors with respect to the aspect camera. This figure also illustrates the
orientation of the pixels on the celestial sphere. The roll angle,
, is defined such that when
= 0, the top of the camera and the top
of pixel A4 point north. The offset between the A and B detectors discussed
in Section 2 is not shown.