All-Sky-Imagers (ASIs) provide horizon-to-horizon views of atmospheric structures and dynamics. They use CCD detectors with narrow band filters to capture emissions from the mesosphere-thermosphere-ionosphere system. This presentation will give examples of how observations from a single-site ASI can be used to conducted detailed analysis of sub-visual aurora that occur at mid-latitudes during geomagnetic storms. Networks of ASI provide inter-hemispheric coverage of such disturbances. Unique to the Boston University network is the deployment of systems at geomagnetic conjugate points—sites located in each hemisphere that share the same magnetic field lines. Conjugate point space physics enables studies of the same geophysical input upon simultaneously different (i.e., seasonal) receptor conditions.