Claritas / Overview / Features / Dynamic Trace Headers

GLOBE Claritas Dynamic Trace Headers

A significant change in GLOBE Claritas Version 5 is support for dynamic reel and trace headers. Now, there is no limit to the number of header entries that can be defined, and a new module (the NEWHDR processor) lets you create new header entries (either reel or trace) which can be integer or float (etc, 12 types in all), scalar or vector. A selection of modules have been modified to be able to print, use or display the new headers, and all modules are being brought up to date so that user- defined headers can be used anywhere, including NMO or mute file interpolation keys. Some modules (AGC, NMOTRACE, REREAD, DISCWRITE) have been modified to use dynamic trace header vectors to store data such as AGC scalars and velocity traces.

The new dynamic trace headers can be created as transient or enduring headers. Transient headers last only for the duration of the job and are not written out to disc. Enduring headers will be saved to disc, via DISCWRITE, which saves the newly created headers in a supplementary hidden file which is automatically picked up by DISCREAD, DISCGATH, DISCSORT and sv. Vector dynamic trace headers with the same element count as the seismic data are called pseudotraces, and will be used increasingly to contain useful seismic metadata, such as AGC scalars and velocity traces. If such headers are present when data is viewed in XVIEW, there is a new “Display pseudotraces” option in the Utils menubar item which lets you view the pseudotraces overlapped with the seismic trace data.