ay Ionosphere recorder site (C-97 airplane) Same as for Rongerik and Kusaie, except that a C+3 Ionosphere recorde was used. This recorder is the same as the C-2, except for a few modifica tions and improvements. The transmitting antenna in the C~97 was a single wire delta fastened to the lateral extremities of the tail assembly. Method of Operation Kusaile: Routine until H ~ 15 minutes; thence once per minute until H £17 minutes; thence twice per minute, alternating the receiving and transmitting antennas at the end of each 15 second sweep, until approximat H #£ 44 minutes; thence once per minute until H # 8 hours; thence routine. Rongerik: Routine until H - 15 minutes; thence once per minute until H # 8 hours; thence routine. C~97 Airborne Station: Routine operation until H - 15 minutes using 30 second sweep time; thence continuous until approximately H # 5 hours. Results Al] stations operated successfully for this shot. (pELETED