The present invention is an apparatus for use with irrigation systems. Nervous states enforce locking of selected information based upon the confidence of the security of the information under sensed external conditions. A carrier frequency of the satellite navigation signal is estimated and an expected carrier frequency of the satellite navigation signal is calculated. The at least one foot defines an arcuate surface. In another embodiment of a method of forming the lower electrode, the texturizing underlayer is formed by depositing overlying first and second conductive metal layers and annealing the metal layers to form surface dislocations, preferably structured as a periodic network.