The time menu is invoked by clicking the TIME DEFINITION button in the Main Menu. An unpopulated and populated version of the menu is shown in Figures 4 and 5 respectively.
The menu establishes the parameters used to define the internal time grid as well as the start and stop times used when putting up time based plots. The time grid definition allows time based data to be stored at a common time resolution which facilitates mathematical operations between data sets. The options available in this menu are:
Close the menu window. The window can also be closed (and reopened) by clicking the TIME DEFINITION button in the Main Menu.
A group of 5 options which sets the time of the leading edge of the first cell in the time grid. It is also used to set the position in UDF/IDFS data sets where data acquisition begins. In order, the inputs are: the full year, day of year, hour, minute and second.
Clicking the Echo button to copy the Start time fields down into the Stop time fields. Handy to cut down on the number of stop fields which may need to be filled.
A group of 5 options which, within time spanned by a single grid cell, is the time of the trailing edge of the last cell in the time grid. It is also used terminate the acquisition of data from UDF/IDFS data sets. In order, the inputs are: the full year, day of year, hour, minute and second.
The time in seconds spanned by a single cell in the internal time grid. This sets the time resolution of the grid and is used to determine the number of cells within the grid. Fractions of seconds are accepted.
