The invention relates to an optical sensor device that comprises a plurality of objectives for generating primary images of corresponding sensor regions. Further, the placement of light sources at the focal point of said reflective surfaces aids in optimizing the amount of light focused in a desired direction. The system comprises a polyphase filter bank, boxcar filter, a detection analyzer for detecting an impact, and time-tagging software for calculating the time of impact. The mode converted seismic data are depth migrated forming CIP mode converted seismic data gathers. The lower portion is a rectangular frame that is telescopically connected to the upper portion, wherein the upper portion is height adjustable with respect thereto.