+h oe = Tuca) @ Project 6.6 - Elecirumagnetic Attenuation Measurements - T. D. Hansconme OBIRCTIVE To xake electromagnetic attenuation measurements as a function of tine at S-band (2260 MC) and 1~bend (9400 MC), PROCADURS Equipment used at this stot consisted of a treanamitter inetalled at approximately 5000 feet from the tover on « line to the receiver in a tover oo Parry. The receiver cutput was delayed 2 sicroseconds and displayed on oscilloscopes having sweep speed of 5 microseconds per centimeter, 50 picroseconds per centimeter, 200 microseconds per centimeter and on a Prush recorder (resolving tine 10 aillsecccads). box® signals, Sveeps vere triggered by “blue One receiving antenna was aimed at tte shot tower to observe direct electromagnetic effect. The receiver scope on this system was svept at 5 microseconds per centineter. BRSULIS All equipment operated. did not basper experiment, Previously observed interference op S-band I-bend signal dropped cut in 3 to 4 microseconds and recovered to within 10 db of full eignal in 90 milliseconds. deta not interpreted. S-band Shook arrived at about 400 nilliseconds. BEST AVAILASLE COPY ~ % -