Zonge GDP-32 - Restrictions

CONTROLLED-SOURCE AUDIO FREQUENCY MAGNETOTELLURICS
Section 11, Page 17 May 2002
11.8 RESTRICTIONS
The only restrictions on setting up the channels and using this program are to make sure the E-
field channels always precede the corresponding H-field channels. In calculating Cagniard
resistivities, the program first looks for an E-field channel, and then matches it up with the first
orthogonal H-field channel that it finds when going down the channel list.
Following are some examples for connecting and defining the channels:
1. Reconnaissance Scalar CSAMT measurements on 7 separate stations:
Data displayed on LCD after acquisition:
Data stored and displayed in cache:
This example of scalar CSAMT, measures E-fields at 7 different stations, with the H-field
antenna placed near the center of the array. This type of array is normally used for
reconnaissance surveys.
The numbers 1 through 7 in the Sta/Ant field are used as station identifiers for data
processing. The Rx value is commonly used to indicate the location of the GDP. These numbers
can be any value from 0 to 99999. The number 30 on the CH 8 Hy line indicates that the
calibrates for ANT/1 Serial Number 3 are to be used. This exact number must identify the
calibrates in the Antenna Cal antenna calibrate cache.
CH Sta/Ant rho E φ
φφ
φ -H φ
φφ
φ SEM GGGA
1Ex 1RHOxy
1
Ex
1
-Hy φ
φφ
φ
2Ex 2RHOxy
2
Ex
2
-Hy φ
φφ
φ
3Ex 3RHOxy
3
Ex
3
-Hy φ
φφ
φ
4Ex 4RHOxy
4
Ex
4
-Hy φ
φφ
φ
5Ex 5RHOxy
5
Ex
5
-Hy φ
φφ
φ
6Ex 6RHOxy
6
Ex
6
-Hy φ
φφ
φ
7Ex 7RHOxy
7
Ex
7
-Hy φ
φφ
φ
8H
y
30
1Ex 1 ExMagEx φ
φφ
φ RHOxy
1
2Ex 2 ExMagEx φ
φφ
φ RHOxy
2
3Ex 3 ExMagEx φ
φφ
φ RHOxy
3
4Ex 4 ExMagEx φ
φφ
φ RHOxy
4
5Ex 5 ExMagEx φ
φφ
φ RHOxy
5
6Ex 6 ExMagEx φ
φφ
φ RHOxy
6
7Ex 7 ExMagEx φ
φφ
φ RHOxy
7
8Hy 30HyMagHy φ
φφ
φ Ex
7
-Hy φ
φφ
φ