a fiber optic grating sensor system is used to localize and measure the environment associated with high speed events including pressure , temperature , velocity and position . this system has the capability to provide timing and physical location markers allowing the character of a rapidly changing event to be accurately measured with specific reference to time and location of that event . the system consists of a fiber grating sensor assembly that may consist of a fiber grating array or chirped fiber grating . markers are put in place by using short fiber gratings that either occupies a different spatial or spectral space so that environmental measurements can be accurately related to time and space . the reflective spectra can be interpreted rapidly through the use of spectral filters , the disappearance of the fiber grating assembly due to an energetic event or arrays of high speed detectors supported by dispersive elements .