Released versions of package DATA
                                                                   
                                                     
    5.90 (2005, June):
            LEN:
            'len-mod.h':  Minor change in GOCAD instructions.
            ELF1:
            'elf1-mod.h': Minor change in GOCAD instructions.
            EX:
            New model with planar interfaces.
            QI:
            'qi-ss4m.h': 'tableicr.for' and 'tableacr.for' substituted
              by 'watable.for'.
            'qi-rpaa.dat': Change of shooting parameters for model QI8.
            'qi-anray.h': The possibility of misusing wrong output files
              in cases when the right output files are not generated
              disabled.
            'anray7.qi','anray8.qi': *** Change of shooting angles. ***
            'tableacr.for': Second order perturbations along anisotropic
              common S-wave ray added.
            'qi-acr.h': Change of UEBMUL to get the same results as
              in version 5.70.
              'qilst.for' substituted by 'watable.for'.
            'tableacr.for','tableacr.for','qilst.for': Removed,
              substituted by program 'watable.for'.
            SD:
            'sd1-mod.h','sd2-mod.h': Minor change in GOCAD instructions.
            98:
            '98-mod.h':  Minor change in GOCAD instructions.
            SAL:
            New example of ray computations in smoothed SEG/EAGE model
              added (comparison of finite-difference and ray-theory
              seismograms, shot 145).
            WB:
            'wb2-mod.h'  Minor change in GOCAD instructions.
            CV:
            'cv-inv.h': Minor change - number of iterations must be
              selected by the user prior to calculation.
                                                     
    6.00 (2006, June):
            PREM:
            'prem-mod.h': History file to transform surfaces and
              a velocity section into VRML or GOCAD.
            L7:
            'l7-crt.h': Default output file changed from Gocad to VRML.
            MAR:
            'gpaxxx.h','gpmxxx.h','gpa.h','gpm.h','gpa-sm.dat',
              'model2.dat','mar-mod2.dat','gb2-crt.dat','gpm-mod.dat',
              'gpm-crt.dat','gpm-writ.dat','gpanal.for','gpstep.for',
              'gpmig.for','fgpm.pl': New programs and an example for 2-D
              Gaussian packet prestack depth migration.
            U2D:
            'u2d-tt.h','u2d-writ.dat','u2d-ttc.dat': New data for
              plotting travel times.
            'u2d-pap.htm': Updated.
            QI:
            'qi-ss4m.h','qi-ss.h': Calculation of coupling ray theory
              seismograms along the common anisotropic rays with
              the second-order perturbations added. Comments updated.
            'qi-ss.h': Compilation of auxiliary programs added.
            TC:
            'greentc.for','greenmul.for': Undefined value UNDEF
              is now determined by function UARRAY of file 'forms.for'.
            'tc.h','tco.h': Compilation of auxiliary programs added.
            SAL:
            'sal-ray1.htm': Updated.
            's145oe1.h','s145oe2.h','s145oe3.h','s145oe4.h',
              's145oe5.h','s145oe6.h','s145se1.h','s145se2.h',
              's145se3.h','s145se4.h','s145se5.h','s145se6.h',
              's145se7.h','s145se8.h': Calculation of travel-time curves
              added and calculation of individual seismograms removed.
            'oe-ttc.dat','se-ttc.dat': New files.
            CV:
            'cv-inv.h': Check for files '*.cal' added.
            CORFUN:
            New directory with history files for correlation
              functions of random media moved here from package FORMS.
            'cknfft.h': *** Several serious bugs fixed. ***
            'corfft.h','corfun.h': Comments updated.
                                                     
    6.10 (2007, June):
            'example.htm': Description updated - the default method
              is to copy all the data files into the working directory
              manually, as the option of using the path $SW3D is not
              system-independent.
            LEN: 'len-inv.h': Modified due to the new programs
              for operations with matrices.
            MAR:
            'mar-msig.h','mar-migr.h','mar-mcrt.h','gpaxxx.h','gpm.htm':
              Data files 'seis-001.h@' to 'seis-240.h@' put on web page
              http://sw3d.cz/software/marmousi/marmousi.htm,
              check for the files added to the history files.
            'mar-inv.h': Modified due to the new programs
              for operations with matrices.
            'mar-crtz.htm','mar-crtz.h','mar-fttz.dat': Calculation
              of travel time derivatives with respect to model
              parameters removed, data file 'mar-fttz.dat' removed.
            *** Files renamed: ***
              'fgpm.pl' to 'fgp.pl'
              'gb2-crt.dat' to 'mgp-crt1.dat',
              'gb.htm' to 'mar-gbo.htm',
              'gb-m0.dat' to 'mgb-m0.dat',
              'gb-test.h' to 'mgb-test.h',
              'gpa-sm.dat' to 'mgpa-sm.dat',
              'gpm-crt.dat' to 'mgp-crt2.dat',
              'gpm.htm' to 'mar-gpm.htm',
              'gpmxxx.h' to 'mar-gpmx.h',
              'mar-mod2.dat' to mar-mo3.dat',
              'gb-crt.dat' to 'mgb-crt.dat',
              'gb-inv.h' to 'mgb-inv.h',
              'gb-opt.h' to 'mgb-opt.h',
              'gpa.h' to 'mar-gpa.h',
              'gpaxxx.h' to 'mar-gpax.h',
              'gpm.h' to 'mar-gpm.h',
              'gpm-writ.dat' to 'mgp-writ.dat',
              'model2.dat' to mar-modx.dat,
              'gpm-mod.dat' to 'mar-mo3c.dat'
            'mar-gbo.htm': Description updated according to example in
              the paper: Zacek, K. (2006): Optimization of the Shape
              of Gaussian Beams. Stud. Geophys. Geod., 50, 346-366.
            'mgb-inv.h': Modified due to the new programs for operations
              with matrices. Calculation updated according to example in
              the paper: Zacek, K. (2006): Optimization of the Shape
              of Gaussian Beams. Stud. Geophys. Geod., 50, 346-366.
              Check for the files updated.
            'mar-gpa.htm': New.
            'mar-gpax.h': Plotting of seismograms to be decomposed,
              composed and differences between seismograms added for
              each shot, comments updated, check for the files updated.
            'mar-gpa.h':  Program 'grdcal.for' used to create files with
              constant initial parameters R0, Y0 of Gaussian packets
              (instead of 'grdte.for'), comments updated.
            'mar-gpm.htm': Description updated according to example in
              the paper: Zacek, K. (2005): Gaussian packet prestack
              depth migration, In: Seismic Waves in Complex 3-D
              Structures, Report 15, pp. 29-48.
            'mar-gpmx.h': Check for the files updated.
            'mar-gpm.h': Comments updated.
            'mar-modc.dat': New.
            'gbopt.for': Moved from package CRT to package DATA,
              directory MAR. Comments updated.
            'gpanal.for': New SEP parameter NUMLIN, composition of
              seismograms uses all Gabor functions (all frequencies),
              comments updated.
            'gpmig.for': New SEP parameter NUMLIN, SEP parameter GPK0
              changed to GPPAR, comments updated.
            'gpstep.for': SEP parameter RAYPAR changed to RPAR,
              SRC changed to REC, CSG changed to SRC, comments updated.
            TC:
            'tc.h','tco.h': Compilation of auxiliary programs corrected.
            'tcrot.for': New parameter NNUMLIN (no change in file date).
            HES: 'hes-inv.h': Modified due to the new programs
              for operations with matrices.
            SAL: 'sal-inv1.h','sal-inv2.h','sal-inv3.h': Modified due to
              the new programs for operations with matrices.
            PLU: 'plu-inv.h': Modified due to the new programs
              for operations with matrices.
            CV: 'cv-inv.h','cv-inv1.h': Modified due to the new programs
              for operations with matrices.
                                                     
    6.20 (2008, June):
            Attribute TYPE="..." added into all HTML links
              to text/html or text/plain files with extension other
              than .htm (without date or version change).
            MAR:
            'mar-crtz.h','mar-crt.h','mar-rpaz.dat','mar-pic.dat',
              'mar-picy.dat','mar-crtz.htm':
              Picture of two-point rays together with auxiliary rays added.
            'mgb-inv.h','mgb-opt.htm': Optimum initial parameters of
              Gaussian beams can be computed also for common-shot gather.
            'mgp-anx.h','mgp-an.htm': Wavefield decomposition performed
              using optimized Gaussian packets.
            'gbopt.for': Initial values for numerical quadrature at
              the initial point added, correction for trapezoidal
              quadrature of a quadratic function added, saving of travel
              times added, SEP parameters and comments updated.
            'gpanal.for': The code was restructured and sped up
              twenty times, SEP parameters and comments updated.
            'gpmig.for': Limits of the loops over the grid points
              influenced by a Gaussian packet corrected (previously
              constant limits), usage of two files with model
              specification in different coordinates eliminated,
              SEP parameters and comments updated.
            'gpstep.for': Part of code moved to gprpar.for, SEP
              parameters and comments updated.
            'gprpar.for': New program to compute ray take-off parameters.
              Control of the maximum slowness added,
              SEP parameters and comments updated.
            'ptsps.for': New program to plot PostScript figures of values
              at individual points, part of code taken from grdps.for.
            *** Files renamed: ***
              'mar-gbo.htm' to 'mgb-opt.htm',
              'mgb-inv.h' to 'mgb-opt.h',
              'mgb-opt.h' to 'mgb-opt1.h',
              'mar-gpa.htm' to 'mgp-an.htm',
              'mar-gpa.h' to 'mgp-an1.h',
              'mar-gpax.h' to 'mgp-an.h',
              'mar-gpm.htm' to 'mgp-mig.htm',
              'mar-gpm.h' to 'mgp-mig1.h',
              'mar-gpmx.h' to 'mgp-mig.h',
              'mgp-writ.dat' to 'mgp-wri.dat',
            'mgb-wri.dat','mgb-test.h','mar-mo3.dat','mar-modx.dat',
              'mar-mo3c.dat','mgpa-sm.dat': Files deleted.
            'gb-ry.cal','gb-s.cal','gb-tau.cal','gb-yd.cal',
              'gprpar.for','mgb-grd.h','mgbstep.ini','mgb-uni.h',
              'mgp-step.h','ptsps.for','gb-sob11': New files.
            SAL:
            'sal-inv2.h': Modified due to the new programs for
              operations with matrices.
            'sal-inv3.h': Checks by 'chk.pl' corrected.
                                                     
    6.30 (2009, June):
            E-mail addresses replaced by WWW addresses
              (without date or version change).
            MAR:
            'mar-picy.dat','mar-crtz.htm','mar-crty.htm':
              Colours in the picture of two-point rays together with
              auxiliary rays modified.
            'mar-vel.h': Redundant parameter 'data_format' erased.
            'mar-crt.dat': Strange values "-000" representing zeros
              changed to "0".
            'gbopt.for': Check position of gridpoints modified,
              two links corrected.
            'gpanal.for': Split into 'gpanal.for' and 'gpsynt.for',
              computation of minimum values of DXR1,DTR1,DP1
              for each OMEGA added, to improve conditional computation
              of amplitudes of Gaussian packets (do not compute
              overlapping GP).  Computation of DXR and DTR according
              to eq. (45),(46),(47) (Zacek, 2006) added.
              Some input parameters renamed.
            'gpsynt.for': Replacing the smallest amplitudes of Gaussian
              packets by zeros added, parameters PKSI,PNY,KAPPA removed.
            'gpstep.for': Computation of DXR and DTR according
              to eq. (45),(46),(47) (Zacek, 2006) added.
              Parameters PARKSI,PARNY renamed to PKSI,PNY,
              parameter PKSIT=PKSI*(1-PNY)/PNY added,
              OMEGAREF,OMEGAMAX renamed to OMEREF,OMEMAX.
            'gpmig.for': Parameters PKSI,PNY removed.
            'gprpar.for': Comments updated.
            'mgb-opt.htm','mgp-an.htm','mgp-mig.htm': Updated.
            'mgb-opt.h': Split to 'mgb-opt.h' and 'mgb-smo.h',
              parameters updated.
            'mgp-step.h': New calculation of Y0MIN (R0*R0/Y0+Y0),
              parameters updated.
            'gb-ry0m.cal': New.
            'mgb-opt1.h','mgb-grd.h','mgp-an.h','mgp-an1.h',
              'mgbstep.ini','mgp-mig.h','mgp-mig1.h':
              Parameters updated.
            'mgb-crt.dat','mgp-crt1.dat','mgp-crt2.dat': Computation
              volume modified.
            'mgb-smo.h': New history file to smooth the initial
              parameters of Gaussian beams.
            PLU:
            'plu.htm': Comments updated.
            SAL:
            'sal-ray1.htm': Updated.
                                                     
    6.31 (2010, June):
            'example.htm': Updated.
            MAR:
            'gpanal.for','gpsynt.for': Comments updated.
                                                     
    6.50 (2011, May):
            'example.htm': Moved to parent directory.
            QI:
            'qih-ss.h': Comments updated, new comparison plot.
            'qi-mod.dat': Minor typo in the parameter A22 corrected.
            'qi1-ss.h','qi4-ss.h','sc-ss.h','kis-ss.h' and corresponding
              data files: Comparison of seismograms calculated
              by common-ray approximation of the coupling ray theory
              in models QI, QI4, SC1_I, SC1_II, ORT and KISS, with
              the seismograms calculated by first order ray tracing,
              and with the seismograms calculated by Fourier method.
            'qi-pap.htm': Updated.
            P1I:
              New 2-D model of real structure. History files for
              construction of smooth model P1 and model P1I with
              structural interfaces.  Calculation of synthetic
              seismograms simulating a reflection measurement
              in model P1I.
              Calculation of synthetic seismograms in model P1
              using ray-based Born approximation.
            BORN:
              Three simple models to test the ray-based Born
              approximation.
                                                     
    6.60 (2012, June):
            MAR:
            'mar-mcrt.h','mar-mpic.dat': Optional plotting of slowness
              together with the calculated two-point rays, plotting of
              the numbers of arrivals and calculated travel times
              together with two-point rays added.
            QI:
            'fm/fm2gse.h','fort/fort2gse.h': Time shift of seismograms
              corrected.
            'qi1-ss.h','qi4-ss.h','sc-ss.h','kis-ss.h':
              Step for calculations of seismograms corrected in order
              to agree with Fourier pseudospectral method seismograms
              and seismograms calculated by the FORT approximation
              of the coupling ray theory.  Seismogram labels changed.
            'qi1-ss.h','qi4-ss.h','sc-ss.h','kis-ss.h': Erroneous
              calling of program 'gsecal.for' corrected.
            'qi-crt.dat': Step for the calculation of rays and for
              storing the quantities calculated along rays changed.
            'sc1-crt.dat','sc2-crt.dat','ort-crt.dat': Step for storing
              the quantities calculated along rays changed.
            *** new ***
            'qi1-ss.h','qi2-ss.h','qi4-ss.h','sc-ss.h','kis-ss.h':
              Prevailing-frequency approximation of the coupling ray
              theory seismograms calculated and compared with standard
              coupling ray theory and Fourier pseudospectral method
              seimograms.
            P1I:
            'p1-mtt.h': Pictures of interpolated travel times added.
                                                     
    7.00 (2013, June):
            'data.htm': Description of calculations in model U2D
              updated.
            'data.htm','refdata.htm','*-pap.htm': All references moved
             to file 'refdata.htm', files '*-pap.htm' erased.
            '98-grd.h','98-mtt.h','98-ss.h','hes-mtt.h','hes-test.h',
              'l7-grd.h','lenb-crt.h','len-crt.h','len-grd.h',
              'len-grid.h','leni-mtt.h','len-inv.h','len-net.h',
              'lenz-crt.h','mar-crt.h','mar-grd.h','mar-test.h',
              'mar-vel.h','n2-net.h','plu-grd.h','prem-crt.h',
              'prem-grd.h','ran-net.h','rm-fd.h','tc.h','u2d-fd.h',
              'u2d-grd.h','u2d-inv.h','u2d-ss.h': Commands to execute
              programs with DATA equal to the name of the history file
              changed to execute the programs with blank DATA.
            98:
            '98-rpa2.dat': Comments updated.
            '98.htm': Minor change.
            QI:
            'qi2-ss.h': New calculation of broad-band coupling-ray
              theory synthetic seismograms in model QI2.
            U2D:
            'u2d-ss.h': Line width of the seismograms in the output
              PostScript files modified.
            *** new ***
            QI:
            'qih-pfa.h','qi1-pfa.h','qi2-pfa.h','qi4-pfa.h','sc-pfa.h',
              'kis-pfa.h': Calculation of two prevailing-frequency
              approximation of the coupling-ray theory Green tensors
              along common anisotropic S-wave rays, calculation of
              synthetic seismograms along the rays, interpolation of
              travel times between the rays.
                                                     
    7.10 (2014, June):
            PREM:
            'prem-src.dat': Comment updated.
            QI:
            'qi-anray.h','qi-ss4m.h','qih-ss.h','qi1-ss.h','qi2-ss.h',
              'qi4-ss.h': File 'anray.for' with the modified version
              of program ANRAY renamed to 'anray_44.for'. Files
              'a2.for','a3.for','a4.for','a5.for','modbs.for' renamed
              to 'a2_44.for','a3_44.for','a4_44.for','a5_44.for',
              'modbs_44.for'. Missing data file 'anrayqi2.qi' added.
            'kis-ss.h','qi1-ss.h','qi2-ss.h','qi4-ss.h','sc-ss.h':
              Captions along the time axis of seimograms corrected.
            'qih-pfa.h','qi1-pfa.h','qi2-pfa.h','qi4-pfa.h','sc-pfa.h',
              'kis-pfa.h': Comments updated.
            'refdata.htm': References to package DATA updated.
            'refdata.htm','kis-pfa.h','qi1-ss.h','qi1-pfa.h','qi2-ss.h',
              'qi2-pfa.h','qi4-ss.h','qi4-pfa.h','qih-ss.h','qih-pfa.h',
              'sc-ss.h','sc-pfa.h': "Single-frequency" changed to
              "prevailing-frequency".
            RM:
            'rm-fd.h': Comments updated.
            *** new ***
            QI:
            'qi2-ss.h','qi4-ss.h','qi2-gr01.dat','qi2-gr02.dat',
              'qi2-gr12.dat','qi4-gr01.dat','qi4-gr02.dat',
              'qi4-gr12.dat': New calculation of synthetic seismograms
              using the prevailing-frequency approximation of the
              coupling-ray theory along anisotropic-ray-theory S1 and
              S2 rays.
            'sc2-srf.h','sc2-a500.h','sc2-a.dat': New history file to
              triangularize the phase-slowness surface and the
              ray-velocity surface in model SC1_II and to display them
              in VRML or GOCAD.
                                                     
    7.20 (2015, June):
            QI:
            'qi4-ss.h': Comments updated.
            'qih-ss.h': Comments updated.
            *** new ***
            QI:
            'sc-ss.h': New calculation of synthetic seismograms using
              prevailing-frequency approximation along SH and SV rays
              in models SC1_I and SC1_II.
            'sc-ss-an.h','anraysc1.qi','anraysc2.qi','anrayort.qi',
              'fresan.scr','fresan.sct','fresan.scv','synfan.sc': New
              history file to calculate anisotropic ray theory S-wave
              synthetic seismograms in models SC1_I, SC1_II and ORT
              using package ANRAY and to compare them with Fourier
              pseudo-spectral method.
            'sc2-ani.h','sc2-rec.dat','sc2-rpan.dat','sc2-col.dat':
              New history file to calculate anisotropic rays in model
              SC1_II using the package CRT and to display
              the calculated rays in VRML or GOCAD.
            'tidemo.h','sc0-a000.dat','wa-a000.dat': New history file
              to determine the reference TI symmetry axis in model
              SC1_II.
                                                     
    7.30 (2016, June):
            QI:
            'qi-mod2.dat','qi-mod4.dat','qi-mod8.dat': Values of A11 and
              A22 specified with higher precission (5 digits after the
              decimal point instead of previous 4 digits).
            'qi2-ss.h','qi2-grhv.dat','qi4-ss.h','qi4-grhv.dat':
              Calculation of synthetic seismograms using prevailing
              frequency approximation of the ray theory along two
              anisotropic approximately SH and SV reference rays added.
            'sc2-ani.h','sc2-rpaw.dat': Minor update, output VRML or
              GOCAD files now contain all the four kinds of rays (common
              ray, two anisotropic rays, SH and SV rays). All types of
              rays calculated to all the receivers.
            *** new ***
            QI:
            'tidemo.h': New possibility to calculate the density-reduced
              elastic moduli of the reference transversely isotropic
              medium.
            'tidemo.h','ort.dat','tri.dat': Two new optional input
              files for program 'tiaxis.for'.
                                                     
    7.40 (2017, June):
            QI:
            'sc2-srf.h','sc2-a000.dat': Slowness surfaces of faster S
              wave and of P wave added, calculation of anisotropy
              strength added, calculations at the depth of 0 km added.
            MAR:
            'gbopt.for','gpanal.for','gpmig.for','gpstep.for',
              'gpsynt.for','ptsps.for': Value of UNDEF used for
              undefined real values may now be specified as input SEP
              parameter (with date and version change).
            TC:
            'greenmul.for','greentc.for','tcrot.for': Value of UNDEF
              used for undefined real values may now be specified as
              input SEP parameter (with date and version change).
            SAL:
            'ptsselec.for': Value of UNDEF used for undefined real
              values may now be specified as input SEP parameter
              (with date and version change).
                                                     
    7.50 (2018, December):
            RM:
            'rm-fd.h': Plotting of the source time function added.