~ STRPETE, YOVERSorca remem Ste Cet te wee ene 1400 8 KILOMETERS 1200 et Eytye OISTANCE SAN O18 MTN + GAKER,ORZ. | 7a. Owe,iAH 1 . | eee te GCOOMIVY AIRCRAFT KING) 4 —oo overcast ER, SREn RR em | 200 LAS VEGAS to ABSORPTION FACTOR Figure 3 Absorption versus distance. Greenhouse, Buster, Tumbler-Snapper, and Ivy. Blue-senaitive photocell (generally Type 929, except Greenhouse used Type 5819). Where noted, R, red-sensitive (Type 925) was used. Absorption factor determined from meas)« Value plotted is effective eXD, ured irradiance at observing station and: Wp *(WT/41D? e” i