2007 Updates:

• PLOT - Add paramater TRIM to trim or crop the non-seismic portion.
• GEOM - Add TYPE 18 for adding lat/long only from ASCII file.
• DISKIN - Allow ipath /dev/null for inserted dead shots.
• SEGDDIN - Honor NMEA $DBT and $SDDBT for water depth.
• SMUTE - Use ADDWB 2X for inner mutes to track the water bottom.
• STACK - Default to use new algorithm that only adds non-zero values.
• PLOT - Add parameter CHART to mimic a strip chart plotter.
• PLOT - Add parameter PLOTTER and make equivalent to NIBS.
• PROUT - Add parameter TRLIST.
• STACK - Calculate the lat/long from the source and receiver coordinates.
• GEOM - Add SETBACK to correct for GPS to source distance.
• HEADER - Add parameter SWAP.
• GEOM - Add MAXDFLS and MINDFLS for type 9 (dfls computed from SEGY header).
• GAINS - Add GAINS2 and GAINS3

2006 Updates:

• PROCS - Create SEVERE WARNINGS that must use "hidden" parameter OVERRIDE to bypass. An overridable error.
• T2D - Change presets so sub-bottom profilers are easier.
• GEOM - Calculate shot spacing on every shot from the NMEA $GPGGA string.
• GEOM - Calculate the range and rp number as distance from the first trace.
• GEOM - Add getting the navigation from the centerbeam file.
• WEIGHT - Add weighting by standard deviation.
• XSTAR - Add new option for dual transducer units.
• SIOSEIS, LSD, SIO2SUN - Auto endian detection ***** Mac Intel AND PowerPC with same binary! ******
• STACK - Default to use new algorithm that only adds non-zero values.

2005 Updates: ******* SIOSEIS ver 2005.7 (25 Sep. 2005) is a MAJOR update ******* Temporary disk file names now include the pid (process id), which is unique to every job running on a computer at the same time. This allows multiple SIOSEIS jobs to be run simultaneously in the same working directory. The negative consequence of this is that SIOSEIS does not delete this these files when SIOSEIS terminates unexpectedly (e.g. control-c). The new temporary files are named: sioseis_PIDtmpLUN, where PID is the Unix pid and LUN is the SIOSEIS logical unit. These file will only be deleted when SIOSEIS terminates normally and "END OF SIOSEIS RUN" is written to stdout. Process STACK was changed (parameter NEW preset to 1) so that amplitudes with a value of zero are ignored from the summation and the averaging process.

• PROCS - Add REALTIME
• DISKIN - Honor REALTIME by waiting for input SEG-Y diskin file additions.
• DESPIKE - Add parameter ENDMUTE.
• STACK - Add parameter NEW.
• FK2TX - Add parameter KILL.
• PROUT - Add parameter INFO.
• DISKOX - Implement automatic file naming with opath DATE or SHOTNO.
• DISKOX - Allow SEG-Y file splits with SEGDDIN parameter NSPFILE.
• GEOM - Add parameters BIN_OFF, FBINX, FBINY, LBINX, LBINY.
• PLOT - NSECS 0 means the length of the first trace.
• XSTAR - Add parameter MKREAL.

2004 Updates:

• SEGDIN, SEGDDIN - Add parameter DESCALE.
• SEGDDIN - Honor $GPGGA nav in the extended header.
• SEGDDIN - Add special case to generate Geometrics file names.
• SEGDDIN - Add special case for Hydroscience's format.
• GAINS - Allow SUBWB with TGP (time-gain-pairs).

2003 Updates:

• GEOM - Add parameter HPATH to create SEG-Y header files.
• GEOM - Calculate feathering angle and crossline offset from UKOOA files.
• GEOM - Calculate range and rp number fron SEG-Y trace header coordinates.
• PLOT - Add parameter ANN2 for second annotation.
• GAINS - Add parameter WINLEN for amplitude running average.
• DISKOX - Set SEG-Y Rev1 "fixed trace length flag" when appropriate.
• HEADER - Parameter REV1 allows a file to be input into the extended header.
• DISKOX - Add EXTHDR to control writing of the SEG-Y extended headers.
• DISKIN, LSD - Handle SEG-Y Rev 1 Textual Extended Headers.
• NMO - Add VINTPL 4 for IVTP spatial interpolation.
• NMO - Add IVTP for interval velocities.
• PLOT - Add parameter DPTR for better grayscale plotting.
• SEGDIN - Write the unmodified SEG-D general header to trace 0.
• STK - Add progressive stack PANEL.
• XSTAR - Add parameters TYPE, FTR, LTR.

2002 Updates:

• SEGDDIN - Add parameter LDEOLIST to handle Ewing real-time directory structure.
• AVENOR - Add parameter HOLD N to use/hold the multipliers from the Nth trace.
• SEGDDIN - New Process to read SEG-D disk files from a user list or a push down stack list.
• SIO2SUN - Enable reading of incomplete SIOSEIS plot files.
• NMO - Add parameter DSTRETCH for "dynamic" NMO stretch mute.
• OUTPUT - Allow second tape output (OUNIT2)
• Mac OSX - Most SIOSEIS programs (lsd, sioseis, sioplt, xloadimage, sio2sun, suntops, sio2hp) ported to Mac OSX.
• pcLinux - Should always be current now.
• SIOPLT - Add option for picking constant velocity stacks.
• SIOPLT - Add picking options using ANY SEG-Y header value.

2001 Updates:

• XSTAR - Add XYZPATH to insert known water depth into SEG-Y headers.
• PLOT, SIO2SUN, SIO2HP - Allow gray scale plotting.
• XSTAR - Add process XSTAR to optimize Edgetech processing.
• WBT - Allow pick tracking.
• SEGDIN - Honor the new R/V Ewing Spectra SEG-D headers.
• HEADER2, HEADER3 - Allow up to three HEADER processes.
• WBT2, WBT3 - Allow up to three WBT processes.
• SIOPLT - Add option -tsets for trace-start-time-end-times sets (create smute parameters).
• SIOPLT - Add option -ttp for trace-time pairs (create mute parameters).
• SIOPLT - Add option -wbt for event picking (create wbt parameters).
• SIOPLT - Add option -twp for trace editing (create trace-weight-pairs).
• SIOPLT - Add option -hf for reading SEG-Y header file.
• SEGDIN - Add parameter RETRAC to renumber traces when there are multiple channel sets.
• PLOT - Add parameter HPATH to write SEGY headers needed for new sioplt.
• GRDOUT - Add process GRDOUT to write GMT GRD formatted files.

2000 Updates:

• GEOM - Add parameter TYPE 9 - calculate dfls from SEG-Y long/lat.
• GAINS - Add parameters TADD and TMULT (time add and multiply).
• TREDIT/DESPIKE - Add parameter LIMITS and KILL INSIDE/OUTSIDE.
• TREDIT - New process duplicating process DESPIKE.
• PLOT - Add parameter RECSP to automatically plot space between records.
• OUTPUT - ADD paramter OUNIT2 to write a second identical tape.
• GAINS - Add TGP (time-gain-pairs) and ADDWB.
• MIX - Add TYPE 4 mix (header mix only) and parameters HDR, LHDR, IHDR.
  • A more automated heave removal scheme.
• WBT - Add parameter INDEX to specify the water time location in the trace header.
  • A heave removal scheme.
• LINUX - SIOSEIS port to Linux PC was easy!
• DISKIN - Add parameter NTODO (number of traces to read).
• F2T - Add Hilbert transform and analytic trace output.
  • Can process Knudsen chirp echosounder data.
• GEOM - Add UKOOA P1 navigation files.

1999 Updates:

• ATLANTEK - A program that reads a SIOSEIS raster file and writes to the Atlantek plotter. Allows near realtime plotting on the R/V Ewing.
• DISKIN - Add parameter ALT 2 to alternate traces between IPATH and IPATH2.
• WEIGHT - Add parameters HDR, IHDR, LHDR for header location of weight.
  • Helps with Edgetech chirp data
• WEIGHT - Add parameter INVERSE for reciprocal of weight.
• GEOM - Add type 7 which inserts elevations into the header only.
• STK - New process for TRIM stack and variable range-time stack.
• DISKOX - Allow 10 disko processes. Add DISKOE, DISKOF, ..., DISKOJ
• DISKIN - Honor large files (>2GB) automatically.
• DISKOX - Add parameter BIG for Sun and HP files > 2GB.
• WBT - Add parameter SEPP, a window for the peak picker.
• OVERLAY - Add parameter LTR and honor HSCALE.
• DESPIKE - Add parameter MINVAL for detecting dead traces.
• INPUT, OUTPUT, SEGDIN - Change parameter DEVICE to allow user to specify device name.
• SEGDIN - Correct reading Syntron IEEE bug.
• SEGDIN - Read the Hydrosweep depth.
• SEGDIN - Read the streamer depths and compasses.

1998 Updates:

• COFILT - Add process COFILT (Coherence Filter)
• PLOT - Add annotation types SH&TR and RP&TR.
• GEOM - Add parameter EPATH for inserting elevations into the SEGY header.
• SEGDIN - Honor SYNTRON/SYNTRAK data.
• NMO - Add parameter NEWX for XMO or MoveOut followed by MoveIn.
• WBT - Add an automatic picker using the "largest" amplitude.
• XCORR - Crosscorrelation using a pilot trace.
• SEG2IN - Read SEG2 formatted data files.
• SIO2HP - Add parameter MARGIN.
• OVERLAY - Program OVERLAY overlays SIOSEIS rasterfiles with picks or travel-times.
• SHIFT - Add INDICES for shifting by any SEG-Y header value.
• PROUT - Add INDICES for printing SEG-Y header.
• GEOM - Add TYPE 6 geometry to read a SIOSEIS navigation file.
• DESPIKE - Add MEDIAN "stack" (use the median value of an rp gather)
• NMO - Add VINTPL 3 for new iso-velocity spatial variation.

1997 Updates:

• DESPIKE - Add parameters KILL, ALPHA, SET, ADDWB, VEL, SES, SEL.
• PLOT - Add parameter WRAP for plotting long traces.
• NMO - Add parameter OPATH for writing velocities in ASCII or SEG-Y.
• SUTIL - Add Dan Lizarralde's SEG-Y utility program.
• PROCS - Add process NMO3, so NMO can be in the procs list three times.
• MANY - Standardize switch to YES/NO from 1/0 and ON/OFF
• SIO2HP - Add printing of an ASCII side label.
• LSD - Add several command line options.
• GEOM - Add parameter DECLIN to add the declination to the compasses.
• GEOM - Add parameter RPADD to be added to each rp number.
• WBT - Add parameter THRES for auto picking using a threshold
• NMO - Add parameters VMUL and VADD (v = (v-vadd) * vmul + vadd)
• FILTER - Change the minimum phase algorithm
• DISKIN - Add FORMAT NOHEAD for files without the SEG-Y file headers
• DISKIN - Add FORMAT SWAPPED to read byte swapped SEG-Y files.
• DISKOX - Add parameter FLINC to write "groups" of rps to disk.
• HISTORY - Creates/appends a history (log) file.

1996 Updates:

• DISKOX - Add parameter REWIND to make "circular" files.
• SEGDIN - New parameters OFFLINE and TR0.
• SEGDIN - Added 4 Ewing acquisition error recoveries.
• tape I/O - Drive status is no longer returned on Sun or HP.
• GEOM - Add parameter BGP and CGP to get LDEO cable depth and compasses.
• FILTER - Added new notch and frequency domain filters.
• SHIFT - Add parameters DATUME and DATUMV.
• VTPLOT - A program and scheme for plotting a velocity profile.
• LSD and LST - list.disk and list.tape as command line.
• SEGDIN - New parameters FILINC, NFSKIP, FORMAT (UTIG eofless), FCSET, LCSET.
• INPUT - New parameters REWIND, NO, TR, ALLNO, ALLTR.
• OUTPUT - New parameter REWIND.
• PSMIGR - Last bugs.

• VTPLOT - A program and scheme for plotting a velocity profile.
• LSD and LST - list.disk and list.tape as command line.
• SEGDIN - New parameters FILINC, NFSKIP, FORMAT (UTIG eofless), FCSET, LCSET.
• INPUT - New parameters REWIND, NO, TR, ALLNO, ALLTR.
• OUTPUT - New parameter REWIND.
• VPICK - An interactive semblance velocity picker.
• WBT - New automatic water bottom picker.
• Process PSMIGR - Phase Shift (Split Step) Depth Migration.
• SIO2HP - Option to print SEG-Y readable header.
• DESPIKE - New parameter QUART.
• PROUT - New parameter NOINC.
• HEADER - New parameters CLEAN, XN and BHDR.
• DISKIN/DISKOX - Allow the SU format.
• SIO2SUN - A program to convert SIOSEIS rasterfiles to Sun rasterfiles.
• VELAN - Option to write SEGY or MAT semblance file.