2. Menus and dialogs

In this chapter all commands will be described accessible through the File menu and the dialogs Process, Plot settings, Program settings, and About.

File menu

From the File menu all basic commands can be accessed. Listed below is a summary of all commands available through the File menu. For a more detailed description on each command, please refer to the Tutorials.

Item	Command	Shortcut	Description
File	Open		Open an existing GSF file
	Create from	Ctrl + N (most recent used)	Create a new project from an existing JSON, CSV, MDL, GRE, SDF, GRS or LOG dataset
	Save	Ctrl + S	Save current GSF file
	Save as...		Save current GSF file with a different file name or path
	Import aux data...		Enables the use of auxiliary data
	Export with template		Export the data as a csv file
	Export Spectrum		Export the stabilized or non-stabilized spectrum as an ASCII file
	Close project		Closes the current GSF project
	Exit	Alt + F4	Quit Gamman
Edit	Copy selection	Ctrl+C	Copy selected data records from the data view table to the clipboard
	Copy chart		Copy the graph from the current view ( data or plot view ) to the clipboard
	Tag selection	Ctrl+T	Tag selected data records
	Untag selection	Shift+Ctrl+T	Untag selected data records
	Invert tagged		Tag all the current untagged records and untag all the current tagged records
	Untag all		Untag all tagged records from the currently active table
	Delete tagged		Delete all tagged records from the currently active table
	Delete selection		Delete selected records
	Append column		Under construction. To add synched auxiliary data, see "Import aux data".
	Delete column		Delete the column selected in a data table
	Calculator		Open the calculator to modify selected data
	Insert time lag		Opens the time lag dialog to modify selected data
Spectral processing	Process all		Process all (untagged) records from the raw data table using the specified fitting scheme
	Process selection		Process only the (untagged) selected records from the raw data table using the specified fitting scheme
	Average and fit selection	Ctrl+F	Summarize the spectra from all the (untagged) selected data records into one value and calculate the radionuclide concentration
	Full-spectrum elevation correction		Process all (untagged) records from the raw data table using full-spectrum elevation correction
	Radon finder		Scan the spectra from all (untagged) data records for possible influence from radon particles in the air using the Radon finder
	Cosmic spectrum builder		Find a cosmic and carrier background spectrum from the selected data using the cosmic spectrum builder
Tools	Coordinate conversion		Converts latitude-longitude coordinates to UTM (WGS84) or Dutch (RD) coordinates
	Borehole corrections		Can transfer measured borehole data to reference borehole data
	Dose rate calculation H*(10)		Calculates the H*(10) doserate for every record based on the collected spectrum
	Classic elevation correction		Process all (untagged) records from the raw data table using classic (windows) elevation correction
	Classic cosmic background finder		Find a cosmic and carrier background spectrum from the selected data using the classic cosmic spectrum finder
	Scripter		Enables scripting of standard processes in Gamman
Calibration	Edit active calibration data		Enables altering the calibration file currently used for the project
	Edit calibration file		Enables altering a selected calibration file
	Replace calibration data		Replace the current calibration file with another
	Re-run energy calibration		Recalculates the stabilization factor a1 for the project
	Background editor		Enables for different background corrections
Help	About		Open the about dialog
	Check for updates		Check the Medusa site for new versions of Gamman
	Program settings		Open the program settings dialog

Process dialog

The process dialog is used to specify the desired fitting scheme and settings. Five fitting schemes are present in Gamman:

1. Fit each
2. Smart fit
3. Repeated average
4. Conditional summing.
5. Traditional fit

Command		Description
Fit each		Each spectrum in the raw dataset is fitted with the standard spectrum
Smart fit		Calculates the running average over a number of data points taking into account the spatial correlation the points have with each other
Smoothing factor	Define the number of data points used in the running average
Repeated average		Averages a number of data points
# records to integrate	Defines the number of data points to average and combine
Conditional fit		Average a number of records until a specified uncertainty is reached
K-40	Radionuclide 40-K (in %)
U-238	Radionuclide 238-U (in %)
Th-232	Radionuclide 232-Th (in %)
Cs-137	Radionuclide 137-Cs (in %)
Traditional fit		Uses the 'classic' windows method to derive nuclide concentrations. Here, the energy window can be specified for each element as wel as the number of records to average. Stripping factors for the selected windows can be obtained by clicking 'Get Strippings'.
Process	Process specified records using current fitting scheme and settings
Plot while processing	Plots spectra during processing. Checking this box will slow down processing.
Use smoothing guideliner	Allows to select a column to use as guideliner*
Interpolate aux data too	While averaging a number of records, the other data columns will be interpolated to represent a correct value for the averaged data
Use non-negative least squares	Use the non-negative least squares method when processing to avoid possible negative concentration values

*Checking use smoothing guideliner displays a dropdown box that allows to select a column in your raw data that contains e.g. line numbers or another guideline. When selected, the smoothening algorithm will only average those data that have the same guideline number. For example, consider that your data contains a column numbering the lines flown in a survey. When using this as a guideliner, the averaging and smoothing algorithm will only use rows of data having the same line number. This avoids overruns and interpolation between flight lines.