Description / Abstract: The data supplement to DO-317B is a single zip file archive that contains test data files for scenarios described in Sections 3.2.7 through 3.2.14 and Appendix U. Additionally, this data supplement contains sample MATLAB implementations of an airborne surveillance processor (described in Appendix C), an In-Trail Procedure (ITP) application (described in Appendix S), and a Traffic Situation Awareness with Alerts (TSAA) application (described in Appendix T). Appendix I describes the test data generation processes. The data files for any particular test scenario reflect all surveillance sources required for the test procedure (e.g., ADS-B, ADS-R, TIS-B, and TCAS). Test data files are provided separately for 1090ES, UAT, and VDL4 installations where necessary due to the differences in state vector construction for each link. Test data files are provided in Comma Separated Value (CSV) format and content represents input to end user or manufacturer systems. Additionally, in most cases “truthdata†is provided for ownship and traffic aircraft in the form of Plain Text (TXT) files. Truth data represents the ideal aircraft states without the addition of surveillance errors. Truth data is provided to enable system performance comparisons.