English to Dutch Tech/Engineering Aerospace / Aviation / Space Patent application (radar)

Backgound information: The subject matter is a patent application for radar-like tracking of airborne targets. Radar can be regarded as an active sensor, however, and in military applications can be easily detected by the energy it radiates and subsequently attacked. For this reason, passive sensors, based on ESM (Electronic Support Measures) or IR/EO (InfraRed/ElectroOptical) can be used. A single sensor, however, cannot produce the required range information, and for this reason two or more sensors need to be used. Geometrical triangulation can provide the absolute positions of a target as an intersection point (called crosses) of two or more measurement directions (called strobes). If several targets are present in the area at the same time, pure geometrical considerations are not enough to find the unique target positions, since there generally are more crosses between strobes than true targets.

Source text: "A cross that does not correspond to any true target is denoted a ghost."

Problem: Can I simply translate 'ghost' as 'spook', or should this term be translated differently? In true radar applications, a related term would be 'false echoes', but I doubt very much whether that term (and its translation as "valse echo's", for example) would be applicable in this case.