Header Editor

The Edgar Header Editor is used for viewing and editing Grams/SPC standard headers. To activate the Header Editor, open any Grams/SPC file, right click anywhere in the plot area, and select Show Header. This will display the Grams/SPC header to the right of the plot area. Then if you right click in the header area you will get a list of all possible header parameters. Not all parameters are displayed by default, but you can turn them on/off by selecting or deselecting to customize your header view. The names of some of the header parameters have been shortened in order fit in less space. You can see the full parameter name by positioning the mouse cursor over the short parameter name or the parameter value. The full name will be displayed briefly then removed.

You have the option to grab the "grip" at the top of the header viewer and drag the header outside the plot window, so that it becomes its own top level window. If you do this, then close the detached window, it will reinsert itself into the plot window.

By default the memo editor for the memo field will show up just below the instrument field. Some versions of Acquire and Grams will also display the memo field.

To deactivate the Header Editor, right click again inside the plot area, then click on Show Header.

All data collected with Edgar should be stored in files with headers that conform to the latest Grams/SPC header specification. There should never be any issues involved with reading these files back into Edgar and viewing the headers with the Edgar Header Editor. In the event you need to access the headers with other software programs, the following information may be helpful:

• The main header date stamp represents UTC as delivered by IRIG, not a local time zone or computer time.
• The month field of the date in the main header runs from 1 to 12 (NOT 0 to 11. January is 1.)
• The "elapsed time" in the subheaders represent the floating point seconds for the corresponding scan, referenced to the zero second mark of the main header time. This value is set by the Annotator to the nearest microsecond.