ahmilb@houu64$bhploadhdr

 BHPLOADHDR Load Trace Header(s) from ASCII file                       

 Required Parameters: None                                            

 Optional parameters:                                                  

 keys=ep,cdp   Headers to use as keys for matching traces to picks file

 hdrs=d1       Trace headers to which picks/horizons are loaded       

               At least 2 keys must be specified, and any number of   

               headers may be loaded at one time.                     

   OR                                                                  

 key=ep,cdp,d1 Old-style specification of keys and single header.     

   OR                                                                 

 key=key1,key2,hdr1,hdr2 Old-style specification of keys and 2 headers.

 file=horz.dat ASCII file containing header key values and pick values

 extrap=no     For traces whose keys values are outside the limits of 

               the horizon data in the ASCII file, extrap=no loads a  

               null header value. extrap=yes loads the nearest        

               header value                                           

               For traces whose keys values are inside the limits of  

               the header data, bilinear interpolation is used to assure

               that a non-null header value is loaded if 2 keys are specified.

               If more than 2 keys are specified, the nearest non-null

               header value is used.                                  

 bias=0        The bias value is added to each header value           

 scalar=1      Each header value is multiplied by scalar before adding bias.

 null=-999.25  Value to use as null