Abstract: A method converts a GNSS receiving system having no interference protection into an interference-suppressing CRPA receiving system. To achieve a low-effort conversion, it is proposed that an existing GNSS antenna is replaced with a CRPA antenna having a CRPA interference suppression unit and the CRPA interference suppression unit is connected to a GNSS receiver by a coaxial cable. A control unit is connected to the coaxial cable, the control unit uses the coaxial cable to conduct a bidirectional communication with the CRPA interference suppression unit. A GNSS signal is received using the CRPA antenna and has interference suppressed using the CRPA interference suppression unit, and the interference-suppressed signal is routed to the GNSS receiver by the coaxial cable.

Abstract: For power-optimised radio relay communication between in particular a station (11) which is operating at low level and navigating at high speed and which is fixed to a missile and a remote ground station (12) the apparatus and time expenditure for antenna tracking from the missile station (11) to the relay station (13) is reduced by the conventional production of an item of tracking direction information (17) on board the missile by direction-finding being replaced by computation of the directional information (17) from a comparison of the current locational data (15, 15') of the navigating station (11) and the relay station (13). If the position of the relay station (13) is variable its locational information (15') is also up-dated with satellite support, for example for correction of a reference position stored there it is transmitted to the missile station (11).