The first four fields in the VIDF, after the optional version field, contain the lineage of the UDF sub-instrument being defined. These fields comprise the UDF PROJECT, MISSION, EXPERIMENT and INSTRUMENT acronyms. None of these fields are actively used by any of the UDF kernel software.
A scalar field, this field contains the UDF project specification. A good rule here is to give the UDF recognized project acronym followed by an expansion of the acronym. In general the project acronym is identical to the corresponding NASA acronym for the project.
The field begins with the line format id t followed by a line of text not to exceed 79 characters. An optional comment field may be added to the end of each line.
Sample VIDF PROJECT field:t IMAGE (Imager For Magnetopause to Auroral Global Explorer) /* Project */
A scalar field, this field contains the UDF mission specification. A good rule here is to give the UDF recognized mission acronym and if different from the project acronym to include the expanded acronym. The mission acronym is generally identical to the corresponding NASA acronym for the mission. NOTE: When the NASA PROJECT and MISSION acronyms are identical the UDF mission acronym generally has a "-1" or "1" appended to the NASA MISSION acronym to indicate the first such MISSION under a PROJECT.
The field begins with the line format id t followed by a line of text not to exceed 79 characters. An optional comment field may be added to the end of each line.
Sample VIDF MISSION field:t IMAGE1 /* Mission */
A scalar field, this field contains the UDF experiment specification. A good rule here is to give the UDF recognized experiment acronym followed by an expansion of the acronym. In general the experiment acronym is identical to the corresponding NASA recognized acronym for the experiment.
The field begins with the line format id t followed by a line of text not to exceed 79 characters. An optional comment field may be added to the end of each line.
Sample VIDF EXPERIMENT field:t HENA (High Energy Neutral Atom Imager) /* Exper */
A scalar field, this field contains the UDF instrument specification. A good rule here is to give the UDF recognized instrument acronym followed by an expansion of the acronym if applicable. In general the UDF follows two lines of approach in grouping data under instruments. Where an experiment is composed of several separate instruments the UDF instrument acronym is often identical to the corresponding NASA recognized acronym for the instrument. Where an experiment is comprised of a single instrument the UDF instrument designation(s) are often separated by the class of data, such as housekeeping or science data.
The field begins with the line format id t followed by a line of text not to exceed 79 characters. An optional comment field may be added to the end of each line.
Sample VIDF EXPERIMENT field:t HENASCI HENA SCIence data /* Inst */