forked from sixty-north/segpy
-
Notifications
You must be signed in to change notification settings - Fork 0
/
trace_header_definition.py
213 lines (206 loc) · 9.49 KB
/
trace_header_definition.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
from revisions import SEGY_REVISION_0, SEGY_REVISION_1
STH_def = {"TraceSequenceLine": {"pos": 0, "type": "int32"}}
STH_def["TraceSequenceFile"]= {"pos": 4, "type": "int32"}
STH_def["FieldRecord"]= {"pos": 8, "type": "int32"}
STH_def["TraceNumber"]= {"pos": 12, "type": "int32"}
STH_def["EnergySourcePoint"]= {"pos": 16, "type": "int32"}
STH_def["cdp"]= {"pos": 20, "type": "int32"}
STH_def["cdpTrace"]= {"pos": 24, "type": "int32"}
STH_def["TraceIdentificationCode"] = {"pos": 28 , "type": "uint16"}
STH_def["TraceIdentificationCode"]["descr"] = {SEGY_REVISION_0: {
1: "Seismic data",
2: "Dead",
3: "Dummy",
4: "Time Break",
5: "Uphole",
6: "Sweep",
7: "Timing",
8: "Water Break"}}
STH_def["TraceIdentificationCode"]["descr"][SEGY_REVISION_1] = {
-1: "Other",
0: "Unknown",
1: "Seismic data",
2: "Dead",
3: "Dummy",
4: "Time break",
5: "Uphole",
6: "Sweep",
7: "Timing",
8: "Waterbreak",
9: "Near-field gun signature",
10: "Far-field gun signature",
11: "Seismic pressure sensor",
12: "Multicomponent seismic sensor - Vertical component",
13: "Multicomponent seismic sensor - Cross-line component",
14: "Multicomponent seismic sensor - In-line component",
15: "Rotated multicomponent seismic sensor - Vertical component",
16: "Rotated multicomponent seismic sensor - Transverse component",
17: "Rotated multicomponent seismic sensor - Radial component",
18: "Vibrator reaction mass",
19: "Vibrator baseplate",
20: "Vibrator estimated ground force",
21: "Vibrator reference",
22: "Time-velocity pairs"}
STH_def["NSummedTraces"] = {"pos": 30 , "type": "int16"}
STH_def["NStackedTraces"] = {"pos": 32 , "type": "int16"}
STH_def["DataUse"] = {"pos": 34 , "type": "int16"}
STH_def["DataUse"]["descr"] = {0: {
1: "Production",
2: "Test"}}
STH_def["DataUse"]["descr"][1] = STH_def["DataUse"]["descr"][0]
STH_def["offset"] = {"pos": 36 , "type": "int32"}
STH_def["ReceiverGroupElevation"] = {"pos": 40 , "type": "int32"}
STH_def["SourceSurfaceElevation"] = {"pos": 44 , "type": "int32"}
STH_def["SourceDepth"] = {"pos": 48 , "type": "int32"}
STH_def["ReceiverDatumElevation"] = {"pos": 52 , "type": "int32"}
STH_def["SourceDatumElevation"] = {"pos": 56 , "type": "int32"}
STH_def["SourceWaterDepth"] = {"pos": 60 , "type": "int32"}
STH_def["GroupWaterDepth"] = {"pos": 64 , "type": "int32"}
STH_def["ElevationScalar"] = {"pos": 68 , "type": "int16"}
STH_def["SourceGroupScalar"] = {"pos": 70 , "type": "int16"}
STH_def["SourceX"] = {"pos": 72 , "type": "int32"}
STH_def["SourceY"] = {"pos": 76 , "type": "int32"}
STH_def["GroupX"] = {"pos": 80 , "type": "int32"}
STH_def["GroupY"] = {"pos": 84 , "type": "int32"}
STH_def["CoordinateUnits"] = {"pos": 88 , "type": "int16"}
STH_def["CoordinateUnits"]["descr"] = {SEGY_REVISION_0: {
1: "Length (meters or feet)",
2: "Seconds of arc"}}
STH_def["CoordinateUnits"]["descr"][SEGY_REVISION_1] = {
1: "Length (meters or feet)",
2: "Seconds of arc",
3: "Decimal degrees",
4: "Degrees, minutes, seconds (DMS)"}
STH_def["WeatheringVelocity"] = {"pos": 90 , "type": "int16"}
STH_def["SubWeatheringVelocity"] = {"pos": 92 , "type": "int16"}
STH_def["SourceUpholeTime"] = {"pos": 94 , "type": "int16"}
STH_def["GroupUpholeTime"] = {"pos": 96 , "type": "int16"}
STH_def["SourceStaticCorrection"] = {"pos": 98 , "type": "int16"}
STH_def["GroupStaticCorrection"] = {"pos": 100 , "type": "int16"}
STH_def["TotalStaticApplied"] = {"pos": 102 , "type": "int16"}
STH_def["LagTimeA"] = {"pos": 104 , "type": "int16"}
STH_def["LagTimeB"] = {"pos": 106 , "type": "int16"}
STH_def["DelayRecordingTime"] = {"pos": 108 , "type": "int16"}
STH_def["MuteTimeStart"] = {"pos": 110 , "type": "int16"}
STH_def["MuteTimeEND"] = {"pos": 112 , "type": "int16"}
STH_def["ns"] = {"pos": 114 , "type": "uint16"}
STH_def["dt"] = {"pos": 116 , "type": "uint16"}
STH_def["GainType"] = {"pos": 119 , "type": "int16"}
STH_def["GainType"]["descr"] = {SEGY_REVISION_0: {
1: "Fixes",
2: "Binary",
3: "Floating point"}}
STH_def["GainType"]["descr"][SEGY_REVISION_1] = STH_def["GainType"]["descr"][SEGY_REVISION_0]
STH_def["InstrumentGainConstant"] = {"pos": 120 , "type": "int16"}
STH_def["InstrumentInitialGain"] = {"pos": 122 , "type": "int16"}
STH_def["Correlated"] = {"pos": 124 , "type": "int16"}
STH_def["Correlated"]["descr"] = {SEGY_REVISION_0: {
1: "No",
2: "Yes"}}
STH_def["Correlated"]["descr"][SEGY_REVISION_1] = STH_def["Correlated"]["descr"][SEGY_REVISION_0]
STH_def["SweepFrequencyStart"] = {"pos": 126 , "type": "int16"}
STH_def["SweepFrequencyEnd"] = {"pos": 128 , "type": "int16"}
STH_def["SweepLength"] = {"pos": 130 , "type": "int16"}
STH_def["SweepType"] = {"pos": 132 , "type": "int16"}
STH_def["SweepType"]["descr"] = {SEGY_REVISION_0: {
1: "linear",
2: "parabolic",
3: "exponential",
4: "other"}}
STH_def["SweepType"]["descr"][SEGY_REVISION_1] = STH_def["SweepType"]["descr"][SEGY_REVISION_0]
STH_def["SweepTraceTaperLengthStart"] = {"pos": 134 , "type": "int16"}
STH_def["SweepTraceTaperLengthEnd"] = {"pos": 136 , "type": "int16"}
STH_def["TaperType"] = {"pos": 138 , "type": "int16"}
STH_def["TaperType"]["descr"] = {SEGY_REVISION_0: {
1: "linear",
2: "cos2c",
3: "other"}}
STH_def["TaperType"]["descr"][SEGY_REVISION_1] = STH_def["TaperType"]["descr"][SEGY_REVISION_0]
STH_def["AliasFilterFrequency"] = {"pos": 140 , "type": "int16"}
STH_def["AliasFilterSlope"] = {"pos": 142 , "type": "int16"}
STH_def["NotchFilterFrequency"] = {"pos": 144 , "type": "int16"}
STH_def["NotchFilterSlope"] = {"pos": 146 , "type": "int16"}
STH_def["LowCutFrequency"] = {"pos": 148 , "type": "int16"}
STH_def["HighCutFrequency"] = {"pos": 150 , "type": "int16"}
STH_def["LowCutSlope"] = {"pos": 152 , "type": "int16"}
STH_def["HighCutSlope"] = {"pos": 154 , "type": "int16"}
STH_def["YearDataRecorded"] = {"pos": 156 , "type": "int16"}
STH_def["DayOfYear"] = {"pos": 158 , "type": "int16"}
STH_def["HourOfDay"] = {"pos": 160 , "type": "int16"}
STH_def["MinuteOfHour"] = {"pos": 162 , "type": "int16"}
STH_def["SecondOfMinute"] = {"pos": 164 , "type": "int16"}
STH_def["TimeBaseCode"] = {"pos": 166 , "type": "int16"}
STH_def["TimeBaseCode"]["descr"] = {SEGY_REVISION_0: {
1: "Local",
2: "GMT",
3: "Other"}}
STH_def["TimeBaseCode"]["descr"][SEGY_REVISION_1] = {
1: "Local",
2: "GMT",
3: "Other",
4: "UTC"}
STH_def["TraceWeightingFactor"] = {"pos": 168 , "type": "int16"}
STH_def["GeophoneGroupNumberRoll1"] = {"pos": 170 , "type": "int16"}
STH_def["GeophoneGroupNumberFirstTraceOrigField"] = {"pos": 172 , "type": "int16"}
STH_def["GeophoneGroupNumberLastTraceOrigField"] = {"pos": 174 , "type": "int16"}
STH_def["GapSize"] = {"pos": 176 , "type": "int16"}
STH_def["OverTravel"] = {"pos": 178 , "type": "int16"}
STH_def["OverTravel"]["descr"] = {SEGY_REVISION_0: {
1: "down (or behind)",
2: "up (or ahead)",
3: "other"}}
STH_def["OverTravel"]["descr"][SEGY_REVISION_1] = STH_def["OverTravel"]["descr"][SEGY_REVISION_0]
STH_def["cdpX"] = {"pos": 180 , "type": "int32"}
STH_def["cdpY"] = {"pos": 184 , "type": "int32"}
STH_def["Inline3D"] = {"pos": 188 , "type": "int32"}
STH_def["Crossline3D"] = {"pos": 192 , "type": "int32"}
STH_def["ShotPoint"] = {"pos": 192 , "type": "int32"}
STH_def["ShotPointScalar"] = {"pos": 200 , "type": "int16"}
STH_def["TraceValueMeasurementUnit"] = {"pos": 202 , "type": "int16"}
STH_def["TraceValueMeasurementUnit"]["descr"] = {SEGY_REVISION_1: {
-1: "Other",
0: "Unknown (should be described in Data Sample Measurement Units Stanza) ",
1: "Pascal (Pa)",
2: "Volts (V)",
3: "Millivolts (v)",
4: "Amperes (A)",
5: "Meters (m)",
6: "Meters Per Second (m/s)",
7: "Meters Per Second squared (m/&s2)Other",
8: "Newton (N)",
9: "Watt (W)"}}
STH_def["TransductionConstantMantissa"] = {"pos": 204 , "type": "int32"}
STH_def["TransductionConstantPower"] = {"pos": 208 , "type": "int16"}
STH_def["TransductionUnit"] = {"pos": 210 , "type": "int16"}
STH_def["TransductionUnit"]["descr"] = STH_def["TraceValueMeasurementUnit"]["descr"]
STH_def["TraceIdentifier"] = {"pos": 212 , "type": "int16"}
STH_def["ScalarTraceHeader"] = {"pos": 214 , "type": "int16"}
STH_def["SourceType"] = {"pos": 216 , "type": "int16"}
STH_def["SourceType"]["descr"] = {SEGY_REVISION_1: {
-1: "Other (should be described in Source Type/Orientation stanza)",
0: "Unknown",
1: "Vibratory - Vertical orientation",
2: "Vibratory - Cross-line orientation",
3: "Vibratory - In-line orientation",
4: "Impulsive - Vertical orientation",
5: "Impulsive - Cross-line orientation",
6: "Impulsive - In-line orientation",
7: "Distributed Impulsive - Vertical orientation",
8: "Distributed Impulsive - Cross-line orientation",
9: "Distributed Impulsive - In-line orientation"}}
STH_def["SourceEnergyDirectionMantissa"] = {"pos": 218 , "type": "int32"}
STH_def["SourceEnergyDirectionExponent"] = {"pos": 222 , "type": "int16"}
STH_def["SourceMeasurementMantissa"] = {"pos": 224 , "type": "int32"}
STH_def["SourceMeasurementExponent"] = {"pos": 228 , "type": "int16"}
STH_def["SourceMeasurementUnit"] = {"pos": 230 , "type": "int16"}
STH_def["SourceMeasurementUnit"]["descr"] = {1: {
-1: "Other (should be described in Source Measurement Unit stanza)",
0: "Unknown",
1: "Joule (J)",
2: "Kilowatt (kW)",
3: "Pascal (Pa)",
4: "Bar (Bar)",
5: "Newton (N)",
6: "Kilograms (kg)"}}
STH_def["UnassignedInt1"] = {"pos": 232 , "type": "int32"}
STH_def["UnassignedInt2"] = {"pos": 236 , "type": "int32"}