a over all ofthe operating frequency range from 1 to 23 megacycles. The trans- ritting and receiving antennas and the ground plane were in mutual perpendicular planes with the plane of the transcitting antenna orlerted 53 degrees to the East of Magnetic North, 2. Ionosphere recorder site (C~-97 airplane) a. Same as for Rengerik and Kusaie, except that a C-3 Ionesphere re- order was used, This recorder is the same as the C-2, except for a few modifi~ cations and improvements. b. The transmitting antenna in the C~97 was a single wire celta fasten- ed to the lateral extremities of the tail assembly. OFSRATTONAL Creand stations at Rongerik and Eucaile, using 15 <-cond sivcep, normal 2) our schedule, 5 sweeps per hour until H-15 rinutes; thence continous Al) stations operated successfully during this test. An examination of the film records for LACROSSE indicates that normal ccenditions existed within the Ionosphere dusing L-day. fects on the Ionosphere fron Test LACROSSE, rey yl fee cn aE ot a ; 7 ye sie mo ovticivbte