(B) where the equipment is designed for and operated in cephalometric mode, to a circle not more than 30 cm in diameter or a rectangle not more than 800 cm in area, fully intercepted by the X-ray image receptor, at a distance of 1.5 m or at the maximum focal spot to image receptor distance, whichever is the lesser, and

In his book, Hager points out that the interception of satellite communications represents only a small, albeit important, part of the eavesdropping system, for there are also numerous facilities for monitoring microwave and cable links, although these are less well documented and their existence is more difficult to prove, since, unlike ground stations, they are rather inconspicuous.

In addition, the requirements referred to in Chapter 5.2. apply: the non-accessibility of the installations, on the grounds that they are operated by the military, the fact that parabolic antennae are required to receive satellite signals and the fact that the size of the satellite antennae needed to capture the C-band in the global beam at least 30 m for the first INTELSAT generation and more than 15 to 18 m for later generations. The official descriptions of the tasks of some of the stations have been cited as evidence of their role in interception operations.