_— , 1 experienced cloud tracker moniter. 123 8 yy A B~25 was appointed as the primary The 1-20 cloud tracker airoraft, and an 1-20 was appointed as back-up, ultimately was ued on the COULOMB C shot because of the anticipated small cloud; the B-25 was used on the COULOMB D event. On each shot, the appointed aircraft were in appropriate orbit at H-hour and were recovered after completion of the sampling mission. Air-to-ground and point-to-point communications were activated in the Air Operations Center to provide aircraft control and to transmit pertinent shot information to the group headquarters at Kirtland. Radio equip~ pent, high frequency and ultra high frequency, installed at the site prior to Operation PLUMBBOB, was used. A communications console was provided by the 4950th, and contractor personnel of the Test Manager installed the console and provided radio technicians for the operation. Three channels of ultra high frequency radio were used successfully for aircraft controls point-to~point were accomplished with one channel of high frequency radio. Adequate maintenance of communications equipment was performed by Reynolds Electric Company radio technicians throughout the operation. The Air Operations Center was manned by one Operations Officer who attended weather outlook briefings, disseminated shot information to inter~ estedAir Force agencies, controlled mission aircreft, and maintained close liaison with the staffs of the Test Director and Test Mancger,. wy of a