Computer rendering of the protoMIRAX balloon gondola, showing the X-ray camera on the front side. The colored boxes at the bottom of the frame are battery packs and electronics racks. The flat box in the back is the TM&TC subsystem. The reaction wheel can be seen below the XRC. One can also see the two star cameras: one is fixed at the XRC and the other (behind the coded mask) is fixed in the gondola frame. At the top, the decoupling mechanism that connects to the balloon cables is shown. The four brown boxes in the bottom are crash pads. The gondola frame dimensions are 1.4 m × 1.4 m × 2 m.