Parameter lists in detail:
NEAR
Describes the offsets at which the travel time points are considered to
be "near the shot". For these travel time branches, the travel times
are interpolated and continued along a parabola to the zero offset.
The travel times are added only for offsets exceeding INSMIN.
| Usage:
| NEAR |
RANGE INSINC INSMIN |
|
3 parameters in this list:
|
|
RANGE
|
Offset threshold. DEF: Negative value (No near points);
|
- Format: FLOAT
- Default value: Not specified
|
|
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INSINC
|
Offset increments at which to insert points at near offsets
|
- Format: FLOAT
- Default value: 100
|
|
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INSMIN
|
Minimum offset at which to insert points at near offsets
|
- Format: FLOAT
- Default value: 0
|
OUTPUT
Specifies the output table of corrected travel time picks.
For completeness of the information, shot and receiver number,
as well as their coordinates,can be output with every travel time pick.
| Usage:
| OUTPUT |
BRANCH SHOTX SHOT RECX REC T DT TABLE |
|
8 parameters in this list:
|
|
BRANCH
|
Name of the table argument entry containing the travel time branch number
|
- Format: Character (8 characters)
- Default value: Not specified
|
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SHOTX
|
Name of the table argument containing shot X coordinate
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- Format: Character (8 characters)
- Default value: Not specified
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SHOT
|
Name of optional table entry containing relative shot number
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- Format: Character (8 characters)
- Default value: Not specified
|
|
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RECX
|
Name of the table argument containing receiver X coordinate
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- Format: Character (8 characters)
- Default value: Not specified
|
|
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REC
|
Name of optional table entry containing relative receiver number
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- Format: Character (8 characters)
- Default value: Not specified
|
|
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T
|
Name of the entry containing corrected travel time
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- Format: Character (8 characters)
- Default value: Not specified
|
|
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DT
|
Name of the entry containing estimated travel tome uncertainty
|
- Format: Character (8 characters)
- Default value: Not specified
|
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TABLE
|
Name of the output travel time table
|
- Format: Character (32 characters)
- Default value: Not specified
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Preceding list (NEAR)
PRINT
Prints a table of ratios of inline offsets to the true (surface)
offsets. This option works only for the travel time tables
for which OFFSET entry is supplied.
1 parameter in this list:
|
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FILE
|
ACCII file name for the printout. If the file exists, new data will be appended to it, unless the append mode is changed using SETUP
|
- Format: Character (72 characters)
- Default value: Not specified
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Preceding list (OUTPUT)
REC
Specifies the table of receiver locations
| Usage:
| REC |
NUMBER X Z TABLE |
|
4 parameters in this list:
|
|
NUMBER
|
Name of the table argument entry containing receiver number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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X
|
Name of the entry containing X coordinates
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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Z
|
Name of the entry containing Z coordinates
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- Format: Character (8 characters)
- Default value: Not specified
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TABLE
|
Name of the receiver table
|
- Format: Character (48 characters)
- Default value: Not specified
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Preceding list (PRINT)
REC-ST
Specifies the tables of receiver statics.
Several tables may be supplied. The proogram searches in
these tables until it finds a value.
| Usage:
| REC-ST |
TRUE NUMBER STATIC FACTOR TABLE |
|
5 parameters in this list:
|
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TRUE
|
TRUE, if the following argument contains true receiver number
|
- Format: Character (8 characters)
- Default value: Relative number
|
|
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NUMBER
|
Name of the table argument containing receiver number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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STATIC
|
Name of the entry containing the value of the statics (this value will be ADDED from the times read fro the tables of travel time picks
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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FACTOR
|
Factor by which the static is multiplied before adding to the travel times
|
- Format: FLOAT
- Default value: 1
|
|
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TABLE
|
Name of the receiver statics table
|
- Format: Character (40 characters)
- Default value: Not specified
|
1 group of 1 REPEAT parameter per line:
TABLE
|
Name of another shot statics table. The program searches in all provided tables until it finds a static correction specified
|
- Format: Character (80 characters)
- Default value: Not specified
|
Preceding list (REC)
RECTIM
Calculates mismatches of reciprocal travel times.
Enables the corrections applied to the travel times. These
corrections ensure matching times at reciprocal points.
| Usage:
| RECTIM |
APPLY TABLE |
|
2 parameters in this list:
|
|
APPLY
|
If you want to apply the correction, put APPLY here
|
- Format: Character (8 characters)
- Default value: No correction
|
|
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TABLE
|
Name of the output table storing the discrepancies of reciprocal travel times. The entries have standard names: arguments: SHOT_1 and SHOT_2 -- (relative) shot numbers; entries: X_1 and X_2 - coordinates of the shot points, respectively, MEAN_T -- mean time at the reciprocal points, DT (difference between the travel time recorded at the second point and the travel time recorded at the first point)DT_1 and DT_2 -- estimated uncertainties of the travel times at points X_1 and X_2, respectively.
|
- Format: Character (64 characters)
- Default value: Not specified
|
Preceding list (REC-ST)
SHOT
Specifies the table of shot locations
| Usage:
| SHOT |
NUMBER X Y Z TABLE |
|
5 parameters in this list:
|
|
NUMBER
|
Name of the table argument containing shot number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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X
|
Name of the entry containing X coordinates
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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Y
|
Name of the entry containing Y coordinates (off-line distance)
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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Z
|
Name of the entry containing Z coordinates
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- Format: Character (8 characters)
- Default value: Not specified
|
|
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TABLE
|
Name of the shot table
|
- Format: Character (40 characters)
- Default value: Not specified
|
Preceding list (RECTIM)
SHOT-ST
Specifies the tables of shot statics.
Several tables may be supplied. The proogram searches in
these tables until it finds a value.
| Usage:
| SHOT-ST |
TRUE NUMBER STATIC FACTOR TABLE |
|
5 parameters in this list:
|
|
TRUE
|
TRUE, if the following argument contains true shot number
|
- Format: Character (8 characters)
- Default value: Relative number
|
|
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NUMBER
|
Name of the table argument containing the shot number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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STATIC
|
Name of the entry containing the value of the statics (this value will be SUBTRACTED from the times read fro the tables of travel time picks
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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FACTOR
|
Factor by which the static is multiplied before adding to the travel times
|
- Format: FLOAT
- Default value: 1
|
|
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TABLE
|
Name of the shot statics table
|
- Format: Character (40 characters)
- Default value: Not specified
|
1 group of 1 REPEAT parameter per line:
TABLE
|
Name of another shot statics table. The program searches in all provided tables until it finds a static correction specified
|
- Format: Character (80 characters)
- Default value: Not specified
|
Preceding list (SHOT)
TT
Specifies the table of travel times for a particular shot.
Optionally, this list allows to add "high frequency" component
of the travel time curves, if it has been removed during the
previous processing. These high-frequency components are not
corrected by the offset, and are interpreted as the effects of
shallow structure near the receiver (or shot).
If reciprocal time travel time corrections are enabled (see list
RECTIM), they are added to the travel times and are output into
the tables specified in the Repeat group of this list.
| Usage:
| TT |
SHOTNUM SHOT REC OFFSET TT TABLE |
|
6 parameters in this list:
|
|
SHOTNUM
|
Name of the table argument containing shot number (its actual value for this branch is supplied in the following entry SHOT)
|
- Format: Trace Header (table entry), name, or numerical value (8 characters)
- Default value: Not specified
|
|
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SHOT
|
True shot number (see the explanation in the description of the module
|
- Format: Trace Header (table entry), name, or numerical value (8 characters)
- Default value: Not specified
|
|
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REC
|
Name of the entry containing receiver number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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OFFSET
|
Name of the argument containing offset in the travel time table. If this entry is specified, do not use off-line distance (Y) in the shot table (list SHOT), since all corrections will be applied by this module.
|
- Format: Character (8 characters)
- Default value: No offset information in the travel time table
|
|
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TT
|
Name of the entry containing travel time
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
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TABLE
|
Name of the travel time table
|
- Format: Character (32 characters)
- Default value: Not specified
|
1 group of 3 REPEAT parameters per line:
This Repeat group allows selective reading of a specified
offset range from the travel time branch
OFFSMIN
|
Minimum used offset
|
- Format: Trace Header (table entry), name, or numerical value (8 characters)
- Default value: No limit
|
OFFSMAX
|
Maximum used offset
|
- Format: Trace Header (table entry), name, or numerical value (8 characters)
- Default value: No limit
|
RTCORR
|
Name of the table of time corrections output by the module. The time corrections are determined using the mismatches of travel times at reciprocal points. Between the reciprocal points, the corrections are linearly interpolated. The table will have entries with the same names as the main tt table, excluding the offset entry.
|
- Format: Character (64 characters)
- Default value: No table output
|
Preceding list (SHOT-ST)
TT-REC
Specifies the table of true receiver numbers. True receiver numbers are
the numbers used in the travel time tables.
| Usage:
| TT-REC |
REC NUMBER TABLE |
|
3 parameters in this list:
|
|
REC
|
Name of the table argument containing true receiver number used in receiver tables
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
|
NUMBER
|
Name of the entry containing true receiver number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
|
TABLE
|
Name of the true shot table
|
- Format: Character (56 characters)
- Default value: Not specified
|
Preceding list (TT)
TT-SHOT
Specifies the table of true receiver numbers. True shot numbers are
the numbers used in the travel time table calls (list TT).
| Usage:
| TT-SHOT |
SHOT NUMBER TABLE |
|
3 parameters in this list:
|
|
SHOT
|
Name of the table argument containing shot number used in shot tables
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
|
NUMBER
|
Name of the entry containing true shot number
|
- Format: Character (8 characters)
- Default value: Not specified
|
|
|
TABLE
|
Name of the true shot table
|
- Format: Character (56 characters)
- Default value: Not specified
|
Preceding list (TT-REC)
IGeoS version 5.1
Copyright (c) 1995-2015, I.B.Morozov
Updated Wed Apr 1 21:42:04 2020