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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />The flare cartridges were spun aluminum tubE~S, <br />3.75" in length with an outside diameter of 1.5". Ninety six units <br />were carried in a light weight aluminum rack. The quick release <br />rack was mounted on an electrical firing base attac hed to the <br />bottom of the aircraft. A ninety six position rotary switch was <br />mounted near the co-pilot's seat and was capable of firing cartridges <br />one at a time or sequentially. A view of the seeding rack is shown <br />in Figure 7. <br /> <br />2. 8 Airborne Data System <br />An airborne data system was utilized to monitor key <br />atmospheric parameters during the cloud seeding flights. The <br />following parameters were measured: <br /> <br />Air temperature <br />Altitude <br />Indicated air speed <br />VOR/DME - aircraft position <br />Liquid water content <br />Ice particle concentration <br /> <br />Figure 8 shows the location of the temperature and <br />liquid water content sensors as they were mounted on the aireraft. <br />An Apple II microprocessor was used to digitiJ~e the <br />measured signals, convert the signals to engineering units, ~LIld to <br />record the data on cassette tape. Simultaneously the data was dis- <br />played on the CRT display mounted in the aircraft. Figure 9 shows <br />the computer, keyboard, CRT, and other displays. Figure 10 gives <br />the block diagram for the data system layout and shows an example <br />of a printer output. Following the aircraft missions, the cassette <br />data tapes could be played through the Apple 'II on to a digital <br />printer. The hard copy printouts were then used for data analysis. <br /> <br />19 <br />