Abstract: Systems and methods for calibrating a temperature sensing system are disclosed. In one respect, a dual light source configuration may be provided. A first light source may illuminate a sensing fiber and an anti-Stokes band may be detected. A second light source may illuminate a sensing fiber and a Stokes band may be detected, where the Stokes band is substantially similar to the anti-Stokes band of the first light source. A ratio between the anti-Stokes and Stokes band may be used to calibrate a temperature sensing system.

Abstract: Systems and methods for calibrating a temperature sensing system are disclosed. In one respect, a line may be placed in operative relation with a first reference cell and a second reference cell. The temperatures of the first and second reference cells may be adjusted. In one non-limiting example, the temperature of the first reference cell may be adjusted to a temperature above an ambient temperature and the temperature of the second reference cell may be adjusted to a temperature below an ambient temperature. The temperature sensing system may be calibrated based on the temperature data of the first and second reference cells.

Abstract: A shipboard support stand for a marine vibrator of the type having characteristic revolutional shape about the vertical axis and a lower concentric guide ring surface which consists of a support ring of circumfery generally equal to the circumference of the vibrator supported by plural vertical supports above the ship's deck, and which further includes a reduced diameter locating ring secured concentrically and at lower elevation from the support ring such that the vibrator can be supported on the support ring with the vibrator guide ring closely retained within the locating ring to stow the vibrator securely.