Create Located Database

Use the option Create Located Database (Geosoft.uxo.gxnet.dll(Geosoft.GX.UXO.UxaCreateLocatedDatabase;Run)*) to create and populate a located database from a dynamic database. In the located database, the data is organized into a structure that is compatible with other Oasis montaj tools (see the Application Notes below).

Expand to see the locations (menus) where this option is available.

UX-Analyze extension:

• AGC Dynamic Data
• AGC Expert User > Dynamic Data Prep and QC

Create Located Database dialog options

Database prefix	Specify the database prefix. The prefix specifies both the input and output databases: Input database is the sensor (data) database: [PREFIX]_Data.gdb Output database is the located database: [PREFIX]_Located.gdb Script Parameter:UXANALYZE.LOCATED_DBPREFIX
Sensor channel suffix	Select the sensor channel suffix, which determines the data channels that will be imported to the located database. The list is populated from the available data channels in the input database. The default value is Norm_Lev. Script Parameter:UXANALYZE.SENCHAN_SUFFIX
Pitch channel	Select the pitch channel from the list of existing database channels. The default value is UXA_PITCH_FILT. Script Parameter:UXANALYZE.PITCH
Roll channel	Select the roll channel from the list of existing database channels. The default value is UXA_ROLL_FILT. Script Parameter:UXANALYZE.ROLL
Heading channel	Select the heading channel from the list of existing database channels. The default value is UXA_COG if it exists; otherwise, it is UXA_Yaw_True_Filt. Script Parameter:UXANALYZE.YAW
Breakout index	Select the breakout index, which will be saved as a new channel in the database. This will make it easier for users to grid coaxial, coincident, or monostatic data (see the Application Notes below). The default index is the first valid time gate (UXA_GateFirstValidTime). Script Parameter:UXANALYZE.MONOSTATIC_BREAKOUT_INDEX
Additional channels	Select any other channels from the list of existing database channels to be saved into the output database. The following channels will be selected by default: UXA_ACQ_TIME_FILT UXA_GPSUTC_FILT UXA_QC_Prepro Script Parameter:UXANALYZE.ADDITIONAL_CHANNELS

Application Notes

In the located database, the data are organized into a structure where there is a group per survey line per receiver cube. This structure is compatible with other Oasis montaj tools that will allow you to plot the individual receiver coil locations and create grids of the transient (amplitude) data.

Transient (Amplitude) Data

Since each group contains the data for a single receiver cube, for the transient data there are channels for each combination of receiver (i.e., X, Y and Z) and transmitter coils.

In addition to make gridding the transient (amplitude) data easier, two other transient channels are created for the vertical dipole (i.e. Z) monostatic and coaxial combinations: UXA_MonostaticZ, and UXA_CoaxialZ or UXA_SumCoxialZ, if there is more than one transmitter coaxial with the receiver.

Definition of Coil Pairs

• Coaxial – Transmitter/Receiver pairs have the same normal vector; the coils point in the same direction.
• Coincident – Transmitter/Receiver pairs have the same location; the coordinates of the center of both coils are the same.
• Monostatic – Transmitter/Receiver pairs are both coaxial and coincident.

Coordinate Channels

Default coordinate channels in the input dynamic data database are used to locate the receiver sensors. For each line in the sensor (data) database, multiple lines will be created in the located database with the same line number and different version numbers. Each output line contains the data for one receiver cube.

The coordinate channels for the center of the array, UXA_X_Array, UXA_Y_Array and UXA_Z_Array, are also copied from the input database, [PREFIX]_Data.gdb, to the output database, [PREFIX]_ Located.gdb.