Fiber optic streamer monitoring

A streamer monitoring system comprising:

• a fiber optic component positioned along a streamer;
• a plurality of fiber Bragg grating sensors distributed at locations along the fiber optic component;
• a light source optically coupled to the fiber optic component and configured to interrogate the fiber Bragg grating sensors;
• a photodetector optically coupled to the fiber optic component and configured to collect spectral data from the interrogated fiber Bragg grating sensors;
• and
• a spectral analyzer in communication with the photodetector and configured to analyze the spectral data to produce measurements of bend of an axis of the streamer proximate the locations along the fiber optic component.

A geophysical survey system comprising:

• a plurality of streamers, each streamer comprising:
• a plurality of geophysical sensors at a plurality of longitudinal positions along the streamer;
• a fiber optic component positioned along the streamer;
• and
• a plurality of fiber Bragg grating sensors distributed at locations along the fiber optic component;
• a recording system;
• and
• a communication channel from one or more of the fiber optic components to the recording system.