Texan Streamline Processing
(TSP)
Eliminating the intermediate step in
converting Texan raw data to
standard SEG-Y.
Steven Harder
Presented at the Active Source
Data Management Workshop
Jan. 26-27, 2014.
Data Flow in TSP
Read metadata
dasfile, shot, geometry files
Read 1 Texan raw file
Convert & Write 1 trace
w/ timing corrections,
geometry and offsets
to each SEG-Y file
The Big Surprise
• TSP runs approximately 30 times faster (clock
time) than the two-step 125segy/texan2segy
combination.
• The primary reason for this speed is that both
data input and output are read and written in
large blocks.
• Input is read one 528-byte page at a time.
Output is written one trace with header at a
time.
Tape vs. Disk I/O
Sequential vs. Random Access
Advantages of TSP
• Speed: ~30 times faster than two-step
methods using sequential access.
• Allows for the additional of traces to existing
SEG-Y files as raw data become available.
• Uses a relational data with natural
organization of data.
• Uses either rectangular and spherical
coordinate systems.
Future Directions
• Output both SEG-Y and PH5 formats
simultaneously?
Raw Data
Dasfile
Geometry
TSP
Standard SEG-Y files
Ready to plot
??
PH5 file
Ready to archive
Shot or
Event File
TSP is available at http://www.geo.utep.edu/pub/harder/tsp3-3-1.zip