Photoelectrons are analyzed with a position-sensitive detector comprising two chevron-stacked microchannel plates coupled to a phosphor screen. A CCD camera takes a 768 × 768 pixel image of the phosphor screen each experimental cycle. The electron spots are event-counted, centroided, and binned into a 1024 × 1024 pixel grid. We have recently implemented new additions to the eventcounting and centroiding algorithm that enable centroid analysis of overlapping electron spots, thereby improving the rate of data collection. Photoelectron centroids are accumulated over several thousand experimental cycles into a single velocity-mapped image, and the radial and angular distributions of the images are calculated using the Maximum Entropy Velocity Legendre Reconstruction (MEVELER) method or the more recently developed MELEXIR (Legendre Expanded Image Reconstruction) method. The electron kinetic energy (eKE) distributions are related to the radial distributions by acquiring images of the well characterized photodetachment transitions of various atomic anions, such as Oˉ, at several different photon energies. Since the VMI spectrometer has a roughly constant resolution ∆v in velocity space and kinetic energy is proportional to v 2 , the slowest photoelectrons are measured with the highest kinetic energy resolution ∆eKE. For this reason, cryo-SEVI spectra are acquired by first taking an overview spectrum at a relatively high detachment energy, comparable to conventional PES, and taking subsequent spectra at detachment energies slightly above the features of interest. Narrow high-resolution windows of these spectra are concatenated and appropriately scaled to create one high-resolution photoelectron spectrum. Cryo-SEVI spectra are plotted as a function of electron binding energy (eBE), determined by eBE = hν -eKE, which is independent of the detachment photon energy.