Within the Quantitative Rescattering model, the generation of high-harmonic light is directly connected to molecular frame photoionization. The essential quantities are the dipole transition moments for ionization of the molecule with the photoelectron being ejected in specific directions in the molecular frame. Related information can also be probed by coincidence measurements where of single photon molecular frame photoelectron angular distributions (MFPADs), recoil-frame photoelectron angular distributions (RFPADs), multiphoton RFPADs, and photoionization of impulsively aligned molecules. In a similar fashion, electron-molecular ion differential scattering cross sections can be related to high-field rescattering spectroscopy. Recent results will be presented examining these connections using computed matrix elements and differential scattering cross sections.
