What: The DPL will include a `partial' correlator input log file for each tracking pass. The GTS will supply only GTS-specific information in the log entries, hence the term `partial'; the VSOG will supply spacecraft-specific information to create the `merged' correlator input log to be supplied to correlators - see §8.2
How: See documents ``Specifications for Input Log to the Mitaka FX-Correlator'', ``Alternative log input to the VLBA correlator for space VLBI observations'', and ``SVLBI Space Radio Telescope Log Input to the Canadian (S2) Correlator''.