I have a configuration for which the nominal fold is 16 (i.e. 48 channel streamer, 1m group interval, 1.5m SP interval).

I have been asked to calculate the fold coverage with the following criteria: Nears: 85% of nominal fold Fars: 75% of nominal fold

I have calculated it and my results are 14 hits per bin in the nears (i.e. 85% of 16) and 12 hits per bin in the fars (i.e. 75% of 16).

However, I was told that my answers are incorrect and that I should half the streamer for calculation of near and far offset bin coverage (i.e. If 16 is the nominal fold, therefore 8 is the nominal fold in the nears and 8 is the nominal fold in the fars). I do not understand why is it necessary to half the streamer for calculation of bin fold. Is this a industry standard practice?

Any answer and all help is truly appreciated.

  • $\begingroup$ What is a multichannel streamer? The average reader may not understand what this question is about (I certainly don't). Can you add a few words or a link to explain what these terms refer to? Thank you! $\endgroup$ – uhoh May 21 '19 at 4:16

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