Abstract

Shot generated noise and the cultural noise is a major problem in seismic survey because they are time and space coincident energy with reflected arrivals. High dynamic range recording systems are capable of recording weak signals of the order of few nano volts, but the presence of high amplitude ambient noise obscure the signal amplitude which sometimes becomes irretrievable. Some ground rolls and air blasts are difficult to remove with conventional array based shot records due to the events being spatially aliased. In the event of using longer array base, high frequency signal is severely affected at far offsets for shallow and dipping reflectors.