AVERAGE SYNTHETIC SCATTERING MATRIX of the Volcanic Ash samples at blue wavelengths (442 nm, 488 nm). DATA ARE FREELY AVAILABLE UNDER THE REQUEST OF CITATION OF: Gomez Martin et al. JQSRT, 271, 107761, 2021, AND Munoz et al. JQSRT, 113, 565-574, 2012. F11_au is normalized so that its average over all directions equals unity. For the extrapolation of the F11 element at forward direction we have assumed the size distribution based on Mie theory. From the extrapolated F11 element we have calculated the corresponding asymmetry parameter= = 0.6912 Angle Fau11 -F12/F11 F22/F11 F33/F11 F34/F11 F44/F11 0 14768.39596 0 0.95708 0.95708 0 0.91416 0.1 9385.42406 2.6262E-6 0.95711 0.95708 -2.112E-7 0.91412 0.2 5267.15645 1.02184E-5 0.95718 0.95708 -1.48423E-6 0.91402 0.3 3179.87954 2.23464E-5 0.95731 0.95708 -4.78307E-6 0.91386 0.4 2131.80928 3.85805E-5 0.9575 0.9571 -1.10681E-5 0.91366 0.5 1544.56603 5.84904E-5 0.95773 0.95712 -2.1301E-5 0.91341 0.6 1175.79383 8.16465E-5 0.95801 0.95717 -3.64448E-5 0.91313 0.7 927.50676 1.07619E-4 0.95835 0.95724 -5.74608E-5 0.91282 0.8 751.90746 1.35977E-4 0.95874 0.95734 -8.531E-5 0.91251 0.9 622.68899 1.66291E-4 0.95918 0.95747 -1.20955E-4 0.91218 1 522.79167 1.98132E-4 0.95968 0.95764 -1.65358E-4 0.91186 2 159.00891 5.0589E-4 0.96747 0.96236 -0.0013 0.91062 3 81.53595 4.93318E-4 0.98045 0.97581 -0.00437 0.91897 4 53.42291 2.35541E-4 0.98754 0.9936 -0.00914 0.93458 5 36.45541 0.00133 0.964 0.99433 -0.01233 0.933 6 29.30592 0.0034 0.9626 0.999 -0.01407 0.93453 7 24.20972 0.0038 0.95687 0.987 -0.01513 0.91873 8 19.57852 0.00553 0.95947 0.98767 -0.0172 0.9126 9 15.15097 0.00693 0.9574 0.99133 -0.01827 0.90047 10 10.74677 0.00867 0.95167 0.98033 -0.01933 0.91167 15 5.45396 0.011 0.91467 0.95733 -0.018 0.86167 20 3.4037 0.01367 0.91833 0.93067 -0.01733 0.82533 25 2.36439 0.014 0.879 0.89933 -0.01033 0.81067 30 1.73918 0.01467 0.86467 0.87367 -0.00267 0.78133 35 1.34479 0.015 0.84133 0.855 0.00667 0.755 40 1.05832 0.02367 0.81233 0.82067 0.02233 0.724 45 0.86009 0.03333 0.78767 0.77333 0.03167 0.67933 50 0.71075 0.045 0.762 0.74567 0.048 0.64767 55 0.59965 0.056 0.72433 0.68733 0.06233 0.60833 60 0.52203 0.07 0.684 0.62933 0.08033 0.55867 65 0.45877 0.08167 0.648 0.55867 0.093 0.524 70 0.41008 0.094 0.61 0.49833 0.103 0.47967 75 0.3727 0.10133 0.587 0.43267 0.121 0.43533 80 0.34358 0.10833 0.552 0.37633 0.12333 0.394 85 0.32011 0.11133 0.51833 0.30533 0.13033 0.364 90 0.30056 0.11533 0.481 0.23033 0.14 0.324 95 0.28492 0.11567 0.454 0.172 0.137 0.284 100 0.27124 0.116 0.435 0.11167 0.13233 0.24567 105 0.25733 0.11533 0.41467 0.05167 0.12833 0.211 110 0.24907 0.10933 0.395 -0.01167 0.12167 0.178 115 0.24016 0.10233 0.38133 -0.074 0.11733 0.139 120 0.2345 0.09267 0.36933 -0.12067 0.10467 0.111 125 0.22843 0.08767 0.361 -0.16767 0.09467 0.07167 130 0.22386 0.06967 0.36333 -0.216 0.079 0.03633 135 0.2217 0.06033 0.36033 -0.25433 0.07167 0.00367 140 0.2204 0.04933 0.36567 -0.29533 0.05833 -0.027 145 0.2191 0.03467 0.38 -0.325 0.04733 -0.05733 150 0.22019 0.015 0.38933 -0.34267 0.03533 -0.08033 155 0.22259 0.007 0.40367 -0.37067 0.02233 -0.105 160 0.2263 -0.012 0.42233 -0.38867 0.01167 -0.13833 165 0.23195 -0.018 0.448 -0.40567 -0.00133 -0.16467 170 0.24108 -0.02433 0.472 -0.43767 -0.02033 -0.177 171 0.24412 -0.023 0.468 -0.42933 -0.02233 -0.18333 172 0.24498 -0.02467 0.462 -0.44867 -0.02967 -0.17067 173 0.25064 -0.02833 0.462 -0.445 -0.027 -0.174 174 0.25683 -0.0251 0.46566 -0.43937 -0.02227 -0.16645 175 0.26301 -0.02019 0.46598 -0.44597 -0.02021 -0.1412 176 0.26984 -0.01952 0.46514 -0.45677 -0.02035 -0.10208 177 0.27536 -0.01667 0.46233 -0.46741 -0.02057 -0.06124 178 0.27927 -0.01013 0.45981 -0.46769 -0.014 -0.00145 179 0.28161 -0.00321 0.45829 -0.46167 -0.00472 0.05767 180 0.28239 -2.66667E-10 0.45779 -0.45779 -1.33333E-10 0.08442