If the station was recording on VLBA tape, recording cannot be immediately stopped. In the NRAO design, the precise tape time of each frame that has been replaced by PRN can be deduced from the station's internal log. At present this information is not further processed, but it is available if needed. I have given the values currently planned for VSOP operation. The NRAO and DSN designs can also handle data in RadioAstron format.
Numerical parameters are then generally different, and additional features become active.
Details will be considered in a separate document. For the Usuda station, if the dropout extends for 3 frames or more, then a complete re-initialization sequence will be initiated. This can be checked by offline software on the basis of the frame counters in the headers. For the DSN stations, it is uncertain whether the frame counters can be used for offline timing recovery following a dropout. Notwithstanding the above recovery methods, the NRAO and DSN stations will carry out a complete re-initialization after some types of signal dropout.