An analysis of rocket AMF-VB-41 measurements of the spatial variation of the I6300/I5200 intensity ratio in the dayside cleft and polar cap ionosphere is reported. The measured variation of the I6300/I5200 ratio is not consistent with significant production of 6300 ¿ emission via the reaction N(2D)+O2→NO+O(1D). An upper limit to the O(1D) yield of 0.1 is obtained for this mechanism. |