Entity seismic_header

• Defines "header information" at nodes of a grid.

Attribute                                 Flags   Data Type

From technical_object:
   data_collection                        IV      set[0 .. N] of (data_collection)

                                          Indicates the data collections that include this
                                          instance of E and P data. 

   graphical_element                      IV      set[0 .. N] of (graphical_element)

                                          Specifies one or more graphical elements which
                                          are depicting this data item. 

   datum_for_ranking                      IV      set[0 .. N] of (object_ranking)

                                          Indicates that an object is being used as a basis
                                          for comparison with another object. 

   object_of_ranking                      IV      set[0 .. N] of (object_ranking)

                                          Indicates that an object is being classified in
                                          a rank order based on its characteristics. 


name                                      MU      ndt_name

                                          The name of the header information. 

seismic_data_header                       MN      ndt_property_element

                                          Defines values at nodes in a grid. If no "grid
                                          use" attributes are defined then the values will
                                          semantically identify each node. For prestack
                                          "trace" data this would typically represent properties
                                          such as "source event uid", "receiver uid" (or
                                          "channel uid"), "bin point index" and/or "bin
                                          line index". 

bin_index_definition                              set[0 .. N] of (binset)

                                          Defines the binsets which defined the "bin point
                                          index" and/or "bin line index" values used in
                                          seismic data header. If only one is defined then
                                          all values are assumed to apply to the definition
                                          in the same binset. If more than one is defined
                                          then a "binset uid" value must be defined in the
                                          header to qualify each index value/pair. Each
                                          "binset uid" value must match the value of attribute
                                          binset uid in one of the referenced binsets. 

channel_uid_definition                            set[0 .. N] of (seismic_geometry_set)

                                          Defines the geometry sets which defined the "channel
                                          uid" values used in attribute seismic data header.
                                          If only one is defined then all values are assumed
                                          to apply to the definition in the same geometry
                                          set. If more than one is defined then a "channel
                                          geometry set uid" value must be defined in the
                                          header to qualify each "channel uid" value. Each
                                          "channel geometry set uid" value must match the
                                          value of attribute seismic geometry set uid in
                                          one of the referenced geometry sets. 

seismic_processing_activity                       seismic_processing_activity

                                          Defines the activity which created this grid.

receiver_uid_definition                           set[0 .. N] of (seismic_geometry_set)

                                          Defines the geometry sets which defined the "receiver
                                          uid" values used in seismic data header. If only
                                          one is defined then all values are assumed to
                                          apply to the definition in the same geometry set.
                                          If more than one is defined then a "receiver geometry
                                          set uid" value must be defined in the header to
                                          qualify each "receiver uid" value. Each "receiver
                                          geometry set uid" value must match the value of
                                          attribute seismic geometry set uid in one of the
                                          referenced geometry sets. 

seismic_geometry_set                      MU      seismic_geometry_set

                                          Defines the acquisition geometry which is represented
                                          by this header information. 

source_uid_definition                             set[0 .. N] of (seismic_geometry_set)

                                          Defines the geometry sets which defined the "source
                                          event uid" values used in seismic data header.
                                          If only one is defined then all values are assumed
                                          to apply to the definition in the same geometry
                                          set. If more than one is defined then a "source
                                          geometry set uid" value must be defined in the
                                          header to qualify each "source event uid" value.
                                          Each "source geometry set uid" value must match
                                          the value of attribute seismic geometry set uid
                                          in one of the referenced geometry sets. 

station_uid_definition                            set[0 .. N] of (seismic_geometry_set)

                                          Defines the geometry sets which defined the "seismic
                                          station uid" values used in seismic data header.
                                          If only one is defined then all values are assumed
                                          to apply to the definition in the same geometry
                                          set. If more than one is defined then a "station
                                          geometry set uid" value must be defined in the
                                          header to qualify each "seismic station uid" value.
                                          Each "station geometry set uid" value must match
                                          the seismic geometry set uid value in one of the
                                          referenced geometry sets. 

use_processing_grid                               binset

                                          Defines the binset that specifies the semantics
                                          of the grid utilized by seismic data header. 

use_acquisition_grid                              seismic_geometry_set

                                          Defines the geometry set that defines the semantics
                                          of the grid utilized by seismic data header. For
                                          example, if the grid specifies "source event uid"
                                          then it is implied that the source event uid grid
                                          of the referenced geometry set is being used.

seismic_data_set                          V       set[0 .. N] of (seismic_data_set)

                                          Defines the data sets which utilize this header
                                          information and which directly or indirectly use
                                          the same grid. 

End of entity seismic_header

M - mandatory, U - unique, I - inherited, V - inverse, N - named type