Statistics

Use the Statistics option (UCENOISEST GX) to produce a statistics summary report of a selected list of channels of all selected lines in the current database.

UXO Land extension:

  •  Data Preparation > QC QA Tools

UXO Marine extension:

  • UXO - Marine Grad > QC QA Tools
  • UXO - Marine Mag > QC QA Tools

Statistics dialog options

Channels to use

Choose the channels to calculate statistics from. The options are:

  • Choose from List
  • Displayed Channels (default)
  • All Channels

Script Parameter: UCENOISEST.USECHAN

Output file name for statistics summary report

Specify the name of the summary report file to be created (ASCII format). Defaults to "<database>_stats.txt".

Script Parameter: UCENOISEST.FILE

Display channel(s) histogram?

Select Yes to display a histogram for all the processed channels.

Script Parameter: UCENOISEST.HIST

Application Notes

The statistics will be calculated for the lines/groups selected in the database.

The statistics of the current X and Y channels are always included in the statistical summary if they are set in the database. The statistics calculated for the X and Y channels include the minimum and maximum values, total distance and the number of points and dummy values.

The statistics calculated for each additional channel include the minimum value, the maximum value, the arithmetic mean, the median, the mode, the standard deviation, the standard deviation of the first and fourth differences, the number of valid points and number of dummy values. These are calculated for each line separately and for the entire selected data set.

Notes

  • For channels that have the data type String, only the channel names will be output to the summary file, no statistics can be calculated.
  • The calculation of statistics is based on the raw data of each channel. If two channels of a given line in a database have different fiducial start and increment, the number of elements used in the calculation in each channel may differ. These channels are recognized by the red underlining of the channel name in the database.

The mode is useful to check the levelling of the data, while the standard deviation of the first and fourth differences can be inspected to identify lines with excessive noise.

Scripting

To run the tool within a Command Prompt script, the following parameters should have values specified:

  • Channels to use: All Channels or selected channels from a list.
  • Display channel(s) histogram?: No