APPLY DELAY

        [CALIBRATE\]APPLY DELAY [Gain] [/FLAG [Threshold]]

      Apply an PathLength (geometric delay) gain calibration result.  The phases
    are assumed to scale strictly as the frequency. This mode is in general  the
    most  appropriate,  since  most  residual phase errors are due to the atmos-
    pheric pathlength change.

      However, it may produce spurious phase jumps if  some  instrumental  phase
    had remained uncalibrated.