This document contains a high-level overview of the data_trk234 data collection.

Data Set Overview
===============================================================================
This collection consists of tracking and navigation data delivered to the Double
Asteroid and Redirection Test (DART) mission by the Deep Space Network (DSN).

Data
===============================================================================
The raw trk-2-34 data has been reformatted using a software tool provided by 
the PDS Small Bodies Node (PDS-SBN) to sort the data by record type.
The difficulty in labeling the natively formatted trk-2-34 files is that data records are 
not sorted by type, meaning that in a worst-case scenario, the PDS XML label would be 
required to have a Table_Binary specification for each data record in the trk-2-34 file, 
resulting in an XML label file that is hundreds of times larger in size than the data file.
To remedy this the original trk-2-34 files, formatted according to the 
document with LID urn:nasa:pds:radiosci.documentation:dsn.trk-2-34:2021-06-03,
have been sorted by data record type. 

The trk234 data products have the following naming convention:
dart_hga_tnf_yyyymmddThhmmss_v##.<extension>

where:
dart_hga_tnf : Hardcoded string; "dart" refers to the DART mission, "hga" notes the data
               is from the high-gain antenna, and "tnf" that this is a tracking and navigation
               file. 
yyyy         : four digit year of first record in the data
mm           : two digit month of first record in the data
dd           : two digit day of first record in the data
T            : Hardcoded string: "T" separates date from time portion of the filename
hhmmss       : two digit hour, two digit minute, two digit second of first record in the data
##           : two digit version number
<extension>: "dat" for the binary file, "xml" for the PDS4 XML label