A sighting device is mountable to a gun. It also includes a container for the electrode assembly, a cap assembly fixed to the container to seal the container, and a collector plate coupled to the positive plate or the negative plate of the electrode assembly. Values of a set of coefficients corresponding to the set of input GNSS measurements are calculated. A capacitor couples the transmit signal driver to the positive input of the operational amplifier. The metal layer is formed by plating andor sputtering, and annealing is performed before andor after release of the cantilever portion. The system component terminates approximately evenly with the top side of the card body of the smart card.