CONTROLLED-SOURCE AUDIO FREQUENCY MAGNETOTELLURICS
Section 11, Page 7 May 2002
Antenna Data
NNNC NNN is the antenna designator or serial number. C is the channel number or
antenna type. For example:
141 Two channel ANT/2, serial number 14, using channel 1 of two channels.
142 Two channel ANT/2, serial number 14, using channel 2 of two channels.
50 Single channel ANT/1, serial number 5. 0 indicates single channel.
500 Single channel ANT/1, serial number 50.
189 Single channel TEM/3, serial number 18.
144 MT/AMT antenna, serial number 14.
Notice that the H-field antenna designator is offset by one space to the right when
compared to the E-field designators. This has been done to easily differentiate
between the two types of numbers. When the STA field is used with the E-field
designators, the value is not used in any calculations. However, we use this field to
indicate the station number for multiple E-field measurements. See Section 11.7,
Restrictions for more information.
At this point, pressing the soft function keys in Menu 3 will result in the following:
VarAsp. Pressing
will put the operator in the variable A-spacing input routine as
shown below. The default A-spacings are set to the values entered in Menu 2 (100 meters):
MENU 3A
ExtAmp. Pressing enables
input for preamplifier gains, such as the
SC-8 Signal Conditioning box. In this
example we have set all E- and H-field
channels to a gain of 1.
0097 CSAMT 0537 15 Mar 98 08:53:47
OPER JOHN DOE TX ID Z-30 A-SP 100
JOB 94007 LINE AJO ROAD N SPREAD 1
Ch A-SP Ch
1 Ex 100 9 OFF
2 Hy 10 OFF
3 Ey 100 11 OFF
4 Hx 12 OFF
5 Hz 13 OFF
6 OFF 14 OFF
7 OFF 15 OFF
8 OFF 16 OFF
CONTINUE to save changes; ESCAPE to exit
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