The Vector Source Menu is used to specify a vector quantity Cartesian coordinates. The restriction in specifying a vector through this menu is that all three components must reside in the same UDF definition. The menu is spawned by a number of the Plot Tools menus when a vector input is called for. When spawned, the menu is immediately visible as:
CLOSE closes the Vector Source Menu window.
The options in the main portion of the menu define the vector source. They are a subset of those used to select the primary source in the Source Definition Menu
The SOURCE option line defines the UDF or IDFS lineage of the data source. Options must be set beginning with the PROJECT option.
PROJECT sets the PROJECT acronym of the source.
MISSION sets the MISSION acronym of the source.
EXPERIMENT sets the EXPERIMENT acronym of the source.
INSTRUMENT sets the INSTRUMENT acronym of the source.
UDF SOURCE sets the VIRTUAL INSTRUMENT acronym of the source.
DATA selects the PIDF category of data to display in the source selection. This is not be confused with the VIDF measurement source. The main difference between the two is data classified as ancillary data in the VIDF may appear in the PIDF either under the Sensor Data or the Ancillary Data categories.
The options displayed under DATA depend on the categories defined in the PIDF. Categories for which there are no entries are not displayed in the option list. The possible options include:
| Option | Definition |
|---|---|
| Sensor | Select data listed under the PIDF sensor definitions. This is the main data definition area containing all of the defined UDF sensor definitions and possibly some or all of the defined UDF ancillary data. This option should always be present. |
| Scan | Select data listed under the PIDF scan block definitions. This option will only appear if the UDF sensor data has an array index associated with it (vector or matrix data). |
| Ancillary | Select data listed under the PIDF ancillary definitions. Only data classified as ancillary data within the UDF will appear in these definitions. |
| Mode | Select data listed under the PIDF mode definitions. This option will only appear if the UDF definition contains mode data. |
| Quality | Select data listed under the PIDF quality definitions. This option should always be present. |
| Spin Angle | Select data listed under the PIDF spin angle definitions. This option will be present only if the PIDF has been set up to recognize that the data may have a phase angle dependence. |
| Pitch Angle | Select data listed under the PIDF pitch angle definitions. This option will be present only if the PIDF has be set up to recognize that the data may have a pitch angle dependence. |
Only data from the PIDF Sensor Category data can be used to define a Vector Source and the Data option must be restricted to this selection.
The GROUP option selects the data grouping under which the vector component measurement is found. There is one option for each of the three vector components.
The Component option is used to select the measurement to be used for the sensor component from those available under the specified data group. There is one option for each of the three vector components.
The UNITS option is used to select the physical units to be used for the vector component. There is one option for each of the three vector components.
MIN VALID sets the value above which the vector component is considered valid. All data below this range is ignored. The minimum value is specified in terms of the units selected for the component. There is one setting for each of the three vector components.
MAX VALID sets the value below which the vector component is considered valid. All data above this range is ignored. The maximum value is specified in terms of the units selected for the component. There is one setting for each of the three vector components.
Below is a filled in Vector Source Menu menu for a satellite position vector.
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