1. A method for operating a radar system, comprising: detecting, by a radar sensor, at least one target object and at least one possible concealing object; determining, by a computer processor, a likelihood of a concealment situation in which that the at least one possible concealing object conceals the at least one target object; wherein: in the case of a recognized concealment situation, if the at least one target object is not detected by the radar system, the processor attributes the non-detection of the at least one target object to the concealment situation and not to a loss of the at least one target object; the concealment situation is ascertained with the aid of plausibility checking of the existence of the at least one concealing object, the plausibility checking including increasing, by the processor, a plausibility value when the radar system detects or, after a concealment that occurred, redetects the at least one target object, and decreasing, by the processor, the plausibility value when the radar system does not detect the at least one target object; and the method comprises decreasing, by the processor, a plausibility value of a non-detected target object recognized as possibly concealed more slowly than that of a non-detected target object which is not recognized as possibly concealed.