A method for forwarding data during cell handover includes: forwarding, by a source base station, user plane data of Packet Data Convergence Protocol, PDCP, data units that have not been transmitted to a User Equipment, UE, to a target base station in a PDCP layer during cell handover. The halftone dot feature extracting unit extracts features of the halftone dots. The remote sensing device may preferably detect the emissions due to an individual vehicle in situations where more than one vehicle is present. The method comprises the following steps: a) the first valve is closed, and the second valve is gradually opened; b) if the second valve is opened at an angle greater than a value between 25\xb0 and 35\xb0, the first valve is gradually opened concomitantly to the opening of the second valve. The first electro-optical component and the beam-shaping optical element are adjustable relative to the optics carrier in a direction of a respective optical axis of the first electro-optical component and the beam-shaping optical element and the second electro-optical component is adjustable and fixable in a plane essentially perpendicular to an optical axis of the second electro-optical element. The programmable delay circuit may provide a relatively large overall signal delay, while also providing a fine temporal resolution.