It is often useful to have a map of noise sources on a block, especially on a 3D operation. The problem is that some are fixed, long term sources and others are transient.
The transient ones, those that are localised and only present for a few shots
(e.g. a light vehicle crossing a line) are generally accepted as part of doing business and are usually ignored. Others need evaluation and noting for processing and interpretation purposes.
So how do we generate a map that highlights the more significant noise sources, but not the transient ones?
My method is to use the sensor test results that are normally acquired by a crew several times per day. By generating an average of the noise level recorded at each receiver point over a period of days, transient noises fade and significant noises build.
PN2 currently only handles Sercel data sets(428 and 508), but may be expanded to handle others in the future.