  Photoionization of molecular species is, essentially, a multi-path
interferometer with both experimentally controllable and intrinsic molecular
characteristics. In this work, XUV photoionization of impulsively aligned
molecular targets ($N_2$) is used to provide a time-domain route to "complete"
photoionization experiments, in which the rotational wavepacket controls the
geometric part of the photoionization interferometer. The data obtained is
sufficient to determine the magnitudes and phases of the ionization matrix
elements for all observed channels, and to reconstruct molecular frame
interferograms from lab frame measurements. In principle this methodology
provides a time-domain route to complete photoionization experiments, and the
molecular frame, which is generally applicable to any molecule (no
prerequisites), for all energies and ionization channels.
