Plate Modelling of VTEM data
with EMIT Maxwell
Configuration file
Information for the configuration file (1)
MaxwellConfFile.mcg
Parameter
Value
1
Configuration Type
2
AirborneType
3
Waveform Type
4
Transmitter Dipole
YES
5
Tx Area Constant
YES
6
Tx Area (m^2)
7
Tx Side Constant
8
Tx Side Along Line (m)
9
Tx Side Constant (Across)
10
Tx Turns Constant
11
Tx Turns
12
Tx Moment Constant
YES
13
Tx Moment (turn-m)
Tx Area X Tx Turns X Tx Current
14
Tx Current Constant
YES
15
Tx Current (A)
6 (Airborne)
2 (Inloop)
1 (Periodic Rectangle)
531(d26 m); 227 (d17 m) or 961 (d35 m)
YES
26; 17 or 35
NONE
YES
4
from the report
Information for the configuration file (2)
MaxwellConfFile.mcg
Parameter
Value
16
Tx Elevation Constant
17
Tx Elevation (m)
18
Adjust Tx for Terrain
19
TD Slingram Tx Direction
20
Along Line Constant
21
Along Line Separation (m)
22
Across Line Constant
23
Vertical Constant
24
Vertical Separation (m)
25
Parallax
26
B Field response
NO (if dB/dt data is considered for modelling)
27
Receiver Dipole
YES
28
Rx Elevation Constant
NO
29
Rx Elevation (m)
30
Rx Side Constant
NO
LEVEL (data channel DEM+radarb)
NO
0
YES
0
NONE
YES
0
NONE
LEVEL (data channel DEM+radarb)
NONE
Information for the configuration file (3)
MaxwellConfFile.mcg
Parameter
Value
31
Rx Turns Constant
32
Rx Turns
33
Adjust Rx for Terrain
34
TD Slingram Rx Direction
0
35
Dipole Direction
0
36
Rx Area Z Component
113.1
37
Rx Area X Component
19.69
38
Units
3(pV)
39
Normalise by Rx Area
YES
40
Normalise by Tx Area
YES
41
Normalise by Tx Current
YES
42
No. of Components
43
Z Component
YES
44
X Component
YES
45
Use Transmitter Loop
NO
YES
1
NO
2
Information for the configuration file (4)
Current WAVEFORM (example)
TIME/FREQUENCY PARAMETERS
Time Domain
: YES
Base Frequency Constant : YES
Base Frequency (Hz)
: 30
On Time Constant
: YES
On Time (s)
:0.0060104
Off Time Constant
: YES
Off Time (s)
: 0.010656
Turn On Constant
: YES
Turn On (s)
: 0.00300
Turn Off Constant
: YES
Turn Off (s)
:0.0013396
Number of channels
: 32
START OF DIGITAL WAVEFORM
Pt Time (s)
Amplitude (A)
1 0.000000000000 0.000000000000
2 0.002000000000 1.000000000000
3 0.006010400000 1.000000000000
4 0.007350000000 0.000000000000
5 0.016666666667 0.000000000000
END OF DIGITAL WAVEFORM
VTEM time gates (or channels)
example
Number of channels
: 44
-------------------START OF CHANNEL TIMES
Ch Start Time (s) End Time(s)
1
0.000018
0.000023
2
0.000023
0.000029
3
0.000029
0.000034
4
0.000034
0.000039
5
0.000039
0.000045
6
0.000045
0.000051
7
0.000051
0.000059
8
0.000059
0.000068
9
0.000068
0.000078
10
0.000078
0.000090
11
0.000090
0.000103
12
0.000103
0.000118
13
0.000118
0.000136
14
0.000136
0.000156
15
0.000156
0.000179
16
0.000179
0.000206
17
0.000206
0.000236
18
0.000236
0.000271
19
0.000271
0.000312
20
0.000312
0.000358
21
0.000358
0.000411
22
0.000411
0.000472
23
0.000472
0.000543
24
0.000543
0.000623
25
0.000623
0.000716
26
0.000716
0.000823
27
0.000823
0.000945
28
0.000945
0.001086
29
0.001086
0.001247
30
0.001247
0.001432
31
0.001432
0.001646
32
0.001646
0.001891
33
0.001891
0.002172
34
0.002172
0.002495
35
0.002495
0.002865
36
0.002865
0.003292
37
0.003292
0.003781
38
0.003781
0.004341
39
0.004341
0.004987
40
0.004987
0.005729
41
0.005729
0.006581
42
0.006581
0.007560
43
0.007560
0.008685
44
0.008685
0.009977
END OF CHANNEL TIMES