Recently, there has been interest in characterizing and understanding the diverse phenomena that
can be found in atmospheric pressure discharges [6]. The nature of the discharge depends on the gas
mixture employed, the dielectric, and the operating conditions. Both glow and filamentary discharge
modes were observed at atmospheric pressure, and the experimental conditions leading to ordering or
patterning of microdischarges have been reported [6]. However, the development of experimental methods,
such as imaging techniques, for quantitative characterization of microdischarges (filaments) and
associated cooperative phenomena in atmospheric pressure discharges is still lacking. Furthermore, theoretical
models describing cooperative phenomena in these discharges are incomplete.