The trensmitting end receiving antennas and the ground plane were in mutual perpendicular planes with the plane of the transmitting antenna oriented 53° to the east of magnetic north, Ionosphere recorder site (C-97 aircraft) Same as for Rongerik and Kusaie, except that a C-3 ionosphere recorder was used. This recorder is the same as the C-2, except for a few modifications and improvements. The transmitting antenna in the C-97 was a single wire delta festened to the lateral extremities of the tail assembly. CPERATION Routine operation until H-15 minutes; thence continuous until H+l hour; thence once per minute until H+2 hours; thence routine. RESULTS All stations operated successfully during this shot. Kusaie: At M43] bance, similar to that observed during the (Cherokee) and Wi the F region of the ionosphere. above Kusaie for about 6 minutes. Zuni), was observed in This disturbance effected the F~2 layer The data shows a continual disturbance, in the F region, until approximately M+l hour. Rongerik: No apparent effect was observed as a result of this shot. C-97 Airborne Station: On this shot the virtual height of the F layer seemed to rise about 5 to 10 percent above normal, crease in absorption. There was a slight in- No atnormal E layer traces were observed, except for a little sporadic E which lasted only a few minutes. In general effects a ~ 52 - a 3 } were relatively small,