Figure5.1 (a) Plan view of the two HEXTE clusters A and B, together with their Cluster Electronics Units (CEUs), oriented as mounted on the spacecraft with orthogonal rocking axes; the phoswich detectors are numbered as they appear in telemetry. The hexagons show the orientation of the collimator cells within each cluster.(b) A side view of one of the clusters shows the Module Support Electronics (MSE) & Phoswich Module Electronics (PME) boxes, shield detectors, collimators, and the phoswich detector/photomultiplier tube assemblies. The RXTE spacecraft's (x,y,z) axes are rendered in each view.§