An analysis of measurements of the 4278-¿, 5200-¿, 5577-¿ and 6300 ¿ emissions obtained from a rocket launch through the postnoon dayside cleft into the polar cap ionosphere is reported. The 4278-¿ and 5577-¿ emission show a clearly defined decrease in intensity at the poleward edge of the dayside particle precipatation, while the 5200-¿ emission extends well into the polar cap with only a slight decrease in intensity. The 6300-¿ emission displays a behavior intermediate between these extremes. The optical data are analyzed by using a dynamical model of dayside cleft auroral processes incorporating transport by ion and neutral winds. It is concluded that neutral winds are responsible for modifying the spatial distribution of the 5200-¿ and 6300-¿ emission while the ion drift component is negligible. In addition, it is found that (1) 80% of the 4278-¿ emission intensity is due to resonance fluorescence in the sunlit cleft ionosphere, (2) the reaction O2(c1&Sgr;u-)+O→ O2+O(1S) is consistent with the 5577-¿ data if the yield of O(1S) from the dissociative recombination of O2+ is about 2%, and (3) the rate of the reaction N2++O→NO++N is apparently higher in the ionosphere than indicated by the laboratory measurements.