A useful piece of information about trace headers is to see the range of values of the headers in a given dataset. Typing,
% surange < data.suwill return the ranges of all SU header fields that are nonzero. For example:
% suplane | surange 32 traces: tracl=(1,32) tracr=(1,32) offset=400 ns=64 dt=4000The program suplane generates a test pattern whose header values simulate a common-offset dataset. The default parameters for suplane are to make 32 traces, with 64 samples per trace at 4 ms (4000 microseconds by SEG convention) sampling, with offset=400. The output consists of three intersecting lines of spikes.
Please note that corrupt data may show really strange values for a large number of the header fields. Detecting such a problem is one of the primary uses of surange.