Decay Display - Measured vs Modeled

Use the Decay Plot - Measured vs Modeled option (Geosoft.uxo.gxnet.dll(Geosoft.GX.UXO.UxaDecayDisplayQc2;Run)*) from the AGC Expert User > Static Data Inversion menu to plot the measured and modeled decays of the coils from TEMTADS and MetalMapper.

Decay Display - Measured vs Modeled dialog options

Databases

Prefix

Select the databases prefix (e.g., SAM, SFR).

Script Parameter: UXANALYZE.DD_DATA_PREFIX

Target group

Select the target group from the target database.

Script Parameter: UXANALYZE.TARGETGROUP

Source group

Select the source group from the source database, which has been modelled using Batch Modelling.

Script Parameter: UXANALYZE.SOURCEGROUP

ID channel

Select the ID channel from the source database.

Script Parameter: UXANALYZE.TARGETID

Mask channel

Select the mask channel from the source database.

Script Parameter: UXANALYZE.TARGETMASK

Data To Display

Sensor channel

Pick the sensor channel from the list of channels in the survey database.

Script Parameter:UXANALYZE._SENCHAN

Low gate

Pick the low gate from the list of available gates.

The list is from 0 to the number of gates for the selected sensor minus one.

Script Parameter: UXANALYZE.LOGATE

High gate

Pick the high gate from the list of available gates.

The list is from 0 to the number of gates for the selected sensor minus one.

Script Parameter: UXANALYZE.HIGATE

Tx coil channel

Pick the transmitter channel from the list of channels in the survey database.

Script Parameter:UXANALYZE.TXCOILCHANL

Rx coil channel

Pick the receiver channel from the list of channels in the survey database.

Script Parameter:UXANALYZE.RXCOILCHAN

Dipole

For the modelled responses, select the dipole results to plot.

Default value is 1. The maximum dipole available is determined by the number of dipoles selected when modelling the data (Model Targets - Batch Mode).

Note: the dipole number is represented by the line version in the subset database. Please refer to Application Notes section of Model Targets - Batch Mode for more details.

Script Parameter:UXANALYZE.DD_DIPOLE_SOLVER

Decay Map

Target selection

Decay maps can be created in a Batch or Interactive mode.

In Batch mode, the decay map is created for all the targets in the target database, whereas in Interactive mode, only the map associated with the selected target ID is created.

Script Parameter:UXANALYZE.TARGET_SELECTION_METHOD

ID

Select the target ID. This entry is enabled only in the Interactive mode.

Script Parameter:UXANALYZE.TARGETIDSELECTED

Map prefix

Map prefix is combined with the target IDs to create the decay map name: Prefix_target ID.map.

Script Parameter: UXANALYZE.DD_MAP_PREFIX

Map name

Map name is formed as:

[PREFIX]_[GROUP].map, for MetalMapper

[PREFIX]_[GROUP]_Tx[TXINDEX].map, for TEMTADS

where [PREFIX] is the prefix entered in Prefix entry, [GROUP] is the subset database line/group name, and [TXINDEX] is the transmitter coil index retrieved from Tx coil channel.

This field is read only.

Script Parameter:N/A

Data range

Data range determines the vertical extent of the plots.

Enter the range manually or use the Calculate button button to retrieve it from the subset database. All survey lines will be considered in calculating the minimum and maximum values.

If left blank, the default values will be retrieved from the subset database.

Min and max values should be greater than 0.001, as the plots have logarithmic axes.

Script Parameters:
   UXANALYZE.DD_DATA_MIN
   UXANALYZE.DD_DATA_MAX

Chi2 threshold

Enter the Chi2 or correlation coefficient threshold. For each transmitter-receiver combination, if the correlation coefficient of the measured and modelled data is less than threshold, the graph is highlighted (yellow).

Default value is blank. If the threshold is blank, no comparison is done.

Script Parameters: UXANALYZE.DD_CORR_THRESHOLD

Overlay background noise

If selected, the background noise will be overlaid on the output map.

The background noise channel, UXA_Noise_Floor, is created when Level Advanced Sensor Data is executed.

Selected by default.

Script Parameter:UXANALYZE.DD_OVERLAY_BKG_NOISE

Application Notes

To create decay curves plots that display different data (for example time gates or dipoles), enter different plot prefixes for each data combination.

The symbols used to plot the measured and modeled data can be reviewed and modified from uxa.config file located in the C:\Program Files\Geosoft\Desktop Applications \etc folder. To review or modify the file, open the file in a text editor, and look for <decayDisplayQc> tag. The elements <posSymbol>, <negSymbol>, and <connectingLine> are used for measured data, and <posSymbol2>, <negSymbol2>, and <connectingLine2> for modeled data.

*The GX tool will search in the "gx" folder. The GX.Net tools, however, are embedded in the Geosoft.uxo.gxnet.dll located in the bin folder. If running this GX interactively, bypassing the menu, first change the folder to point to the bin folder, then supply the GX.Net tool in the specified format.