EAS Ground Calibration tables


This page documents the EAS ground calibration values. The first two sections present the deflector ratios applied, elevation resolution, peak elevation and geometric factors for 32 anodes, respectively, for EAS1 and EAS2 sensors. Section 3 shows the formula used to calculate the quantum efficiencies and the table shows energy table and quantum efficiencies. Same energy table has been used for both EAS1 and EAS2.
Elevation values correspond to sensor look directions.

1) EAS1 Geometric factors

  Elevation(deg)Anode Geometric factors (cm^2 sr eV/eV)
Deflector Ratios Elevation Resolution (deg) (instr. look directions) Anode01(5.625)Anode02(16.875)Anode03(28.125)Anode04(39.375)Anode05(50.625)Anode06(61.875)Anode07(73.125)Anode08(84.375)Anode09(95.625)Anode10(106.875)Anode11(118.125)Anode12(129.375)Anode13(140.625)Anode14(151.875)Anode15(163.125)Anode16(174.375)Anode17(185.625)Anode18(196.875)Anode19(208.125)Anode20(219.375)Anode21(230.625)Anode22(241.875)Anode23(253.125)Anode24(264.375)Anode25(275.625)Anode26(286.875)Anode27(298.125)Anode28(309.375)Anode29(320.625)Anode30(331.875)Anode31(343.125)Anode32(354.375)
+3.09.5919143.03874.13811e-0054.00194e-0054.27832e-0054.48269e-0054.54528e-0054.76581e-0054.68146e-0052.84571e-0053.87003e-0055.64139e-0054.75795e-0054.18926e-0054.29358e-0054.63143e-0054.73171e-0054.91476e-0054.82324e-0055.24387e-0053.39960e-0053.60486e-0055.29232e-0055.19608e-0059.98522e-0069.98522e-0061.16206e-0051.16206e-0054.70277e-0054.84298e-0053.00431e-0052.85872e-0054.57018e-0054.20048e-005
+2.68.3207436.32063.81439e-0053.63156e-0053.92365e-0054.11590e-0054.11456e-0054.25701e-0054.47955e-0052.71537e-0053.34419e-0055.10635e-0054.32656e-0053.87138e-0054.01069e-0054.05174e-0054.24131e-0054.34607e-0054.39834e-0054.76424e-0053.08149e-0053.40633e-0054.96479e-0054.86923e-0053.33297e-0053.33297e-0053.30762e-0053.30762e-0054.42997e-0054.43581e-0052.90292e-0052.81789e-0054.17715e-0053.93060e-005
+2.27.2284430.09833.34374e-0053.18199e-0053.45927e-0053.61115e-0053.65534e-0053.71950e-0053.81641e-0052.42396e-0052.87734e-0054.42212e-0053.86532e-0053.46286e-0053.52635e-0053.54564e-0053.62303e-0053.80834e-0053.83705e-0053.98781e-0052.84638e-0053.17324e-0054.30098e-0054.33598e-0054.04187e-0054.04187e-0053.80138e-0053.80138e-0053.95124e-0054.00732e-0052.65435e-0052.58211e-0053.65377e-0053.47722e-005
+1.86.4067724.15863.04402e-0052.90785e-0053.15664e-0053.36482e-0053.30493e-0053.34531e-0053.29416e-0052.26647e-0052.53141e-0054.04254e-0053.47295e-0053.13667e-0053.21721e-0053.14318e-0053.26881e-0053.33902e-0053.47408e-0053.52410e-0052.60859e-0052.92109e-0053.72937e-0054.01069e-0053.67127e-0053.67127e-0053.55080e-0053.55080e-0053.60015e-0053.61025e-0052.39793e-0052.32570e-0053.19276e-0053.15933e-005
+1.45.6575518.50922.86164e-0052.68643e-0052.89102e-0053.12994e-0053.06937e-0053.07588e-0052.96304e-0052.10495e-0052.25997e-0053.86487e-0053.27487e-0052.89282e-0052.96640e-0052.87510e-0052.96461e-0053.11222e-0053.19612e-0053.17975e-0052.33445e-0052.66445e-0053.42562e-0053.69864e-0053.51244e-0053.51244e-0053.34015e-0053.34015e-0053.34486e-0053.29595e-0052.25548e-0052.16417e-0052.96102e-0052.94217e-005
+1.04.9997913.04752.70236e-0052.53052e-0052.80241e-0052.94801e-0052.88228e-0052.89349e-0052.80847e-0051.89430e-0052.10203e-0053.60666e-0053.06264e-0052.74274e-0052.78895e-0052.71492e-0052.87532e-0052.95563e-0052.94688e-0053.04851e-0052.14870e-0052.55968e-0053.24211e-0053.50975e-0053.32399e-0053.32399e-0053.07857e-0053.07857e-0053.14228e-0053.16292e-0052.11527e-0052.06951e-0052.76226e-0052.80847e-005
+0.64.351577.697652.55609e-0052.44190e-0052.69159e-0052.78873e-0052.81228e-0052.82036e-0052.61666e-0051.81915e-0051.89744e-0053.46578e-0052.96573e-0052.56910e-0052.72816e-0052.57808e-0052.65996e-0052.81453e-0052.89327e-0052.80533e-0052.08857e-0052.48408e-0053.10325e-0053.37178e-0053.23134e-0053.23134e-0052.99400e-0052.99400e-0053.10594e-0052.94711e-0052.09284e-0051.94747e-0052.66646e-0052.69989e-005
+0.23.737022.365442.51661e-0052.32929e-0052.58099e-0052.73623e-0052.67925e-0052.68688e-0052.52693e-0051.72403e-0051.84472e-0053.34082e-0052.83180e-0052.58615e-0052.55901e-0052.49260e-0052.60926e-0052.70124e-0052.82529e-0052.72412e-0052.00490e-0052.34701e-0052.95945e-0053.33117e-0053.07700e-0053.07700e-0052.91032e-0052.91032e-0052.89215e-0052.88497e-0051.98583e-0051.88667e-0052.51010e-0052.60051e-005
-0.23.25181-2.985502.46950e-0052.32143e-0052.46815e-0052.65256e-0052.67499e-0052.63887e-0052.40893e-0051.74130e-0051.77428e-0053.38210e-0052.76854e-0052.45043e-0052.56933e-0052.42710e-0052.49776e-0052.67073e-0052.71559e-0052.63416e-0052.02957e-0052.29496e-0052.92243e-0053.13129e-0053.01508e-0053.01508e-0052.83472e-0052.83472e-0052.94980e-0052.78895e-0051.98336e-0051.86491e-0052.52625e-0052.53702e-005
-0.63.02054-8.318342.44706e-0052.28150e-0052.47353e-0052.65076e-0052.70572e-0052.58682e-0052.46725e-0051.73906e-0051.79918e-0053.30358e-0052.75328e-0052.49597e-0052.54016e-0052.43809e-0052.50853e-0052.62878e-0052.68845e-0052.64650e-0051.97685e-0052.34342e-0052.88990e-0053.15327e-0052.97762e-0052.97762e-0052.87218e-0052.87218e-0052.90493e-0052.80129e-0051.96519e-0051.91561e-0052.55654e-0052.53747e-005
-1.02.90266-13.63652.45065e-0052.27365e-0052.50135e-0052.64358e-0052.65054e-0052.60612e-0052.48251e-0051.78617e-0051.77675e-0053.37111e-0052.81340e-0052.43809e-0052.51347e-0052.42912e-0052.47668e-0052.62743e-0052.70460e-0052.64740e-0052.02396e-0052.30281e-0052.98525e-0053.15013e-0052.98031e-0052.98031e-0052.81497e-0052.81497e-0052.89551e-0052.80084e-0051.96474e-0051.89093e-0052.57224e-0052.54936e-005
-1.42.89333-19.05812.39053e-0052.30685e-0052.53007e-0052.67521e-0052.68284e-0052.61419e-0052.50382e-0051.83754e-0051.89048e-0053.39152e-0052.80533e-0052.53209e-0052.59580e-0052.45671e-0052.58974e-0052.70931e-0052.77459e-0052.68845e-0052.05829e-0052.40332e-0053.04245e-0053.16606e-0053.06399e-0053.06399e-0052.89596e-0052.89596e-0052.92827e-0052.90314e-0052.06502e-0051.93759e-0052.63394e-0052.59782e-005
-1.83.20725-24.69232.58391e-0052.39906e-0052.67858e-0052.81430e-0052.74655e-0052.72726e-0052.72502e-0051.92503e-0051.99435e-0053.51378e-0052.94733e-0052.62092e-0052.75620e-0052.64605e-0052.65727e-0052.79277e-0052.90965e-0052.91279e-0052.23978e-0052.54375e-0053.21900e-0053.25826e-0053.18513e-0053.18513e-0052.94980e-0052.94980e-0053.06309e-0053.05075e-0052.15543e-0052.03630e-0052.75440e-0052.70393e-005
-2.23.84214-30.56082.80959e-0052.67319e-0052.94330e-0053.05322e-0053.07633e-0053.01822e-0053.03572e-0052.13546e-0052.20007e-0053.98063e-0053.27038e-0052.90067e-0053.03527e-0052.80062e-0052.93500e-0053.09898e-0053.22057e-0053.28361e-0052.57516e-0052.68867e-0053.66095e-0053.61788e-0053.46869e-0053.46869e-0053.26544e-0053.26544e-0053.37582e-0053.42338e-0052.39098e-0052.35643e-0053.15327e-0053.02585e-005
-2.64.77782-36.77223.36527e-0053.03505e-0053.36864e-0053.50346e-0053.51692e-0053.47138e-0053.69707e-0052.54891e-0052.56641e-0054.63165e-0053.80923e-0053.38793e-0053.47004e-0053.34172e-0053.41844e-0053.58377e-0053.67194e-0054.00508e-0052.98615e-0053.01778e-0054.28191e-0054.24310e-0054.03761e-0054.03761e-0053.81058e-0053.81058e-0053.90592e-0053.91714e-0052.66220e-0052.62541e-0053.72085e-0053.49763e-005
-3.06.06580-43.48914.01226e-0053.73363e-0054.01989e-0054.21304e-0054.23884e-0054.26038e-0054.27204e-0052.82440e-0053.09921e-0055.32171e-0054.71309e-0054.10760e-0054.21528e-0054.03716e-0054.21730e-0054.37770e-0054.53362e-0054.86160e-0053.37380e-0053.35338e-0055.11734e-0055.11443e-0054.84634e-0054.84634e-0054.55515e-0054.55515e-0054.61415e-0054.69177e-0052.93791e-0052.93028e-0054.46542e-0054.08786e-005


2) EAS2 Geometric factors

  Elevation(deg)Anode Geometric factors (cm^2 sr eV/eV)
Deflector Ratios Elevation Resolution (deg) (instr. look directions) Anode01(5.625)Anode02(16.875)Anode03(28.125)Anode04(39.375)Anode05(50.625)Anode06(61.875)Anode07(73.125)Anode08(84.375)Anode09(95.625)Anode10(106.875)Anode11(118.125)Anode12(129.375)Anode13(140.625)Anode14(151.875)Anode15(163.125)Anode16(174.375)Anode17(185.625)Anode18(196.875)Anode19(208.125)Anode20(219.375)Anode21(230.625)Anode22(241.875)Anode23(253.125)Anode24(264.375)Anode25(275.625)Anode26(286.875)Anode27(298.125)Anode28(309.375)Anode29(320.625)Anode30(331.875)Anode31(343.125)Anode32(354.375)
+3.09.4538744.03033.92253e-0053.58187e-0053.58187e-0053.48067e-0053.50063e-0053.43506e-0053.33386e-0052.19644e-0052.80791e-0054.11922e-0054.23040e-0053.79567e-0053.74436e-0053.98667e-0053.90828e-0053.69162e-0053.91683e-0053.61608e-0052.33185e-0052.13658e-0053.63604e-0053.51061e-0051.17020e-0051.17020e-0051.17590e-0051.17590e-0053.53199e-0053.54054e-0052.26771e-0052.37034e-0053.62178e-0053.83416e-005
+2.67.8925037.14963.89402e-0053.78712e-0053.71158e-0053.73866e-0053.62036e-0053.72583e-0053.66312e-0052.28909e-0052.79366e-0054.33588e-0053.93821e-0054.10782e-0053.92395e-0054.19762e-0054.22755e-0054.11067e-0054.00377e-0053.93251e-0052.53567e-0052.20642e-0053.58900e-0053.45074e-0052.70957e-0052.70957e-0052.66681e-0052.66681e-0053.51203e-0053.34384e-0052.21782e-0052.17079e-0053.66027e-0053.70303e-005
+2.26.7074330.66453.76146e-0053.54196e-0053.65314e-0053.50633e-0053.51203e-0053.63461e-0053.68022e-0052.29764e-0052.59839e-0053.96814e-0054.12208e-0054.07504e-0054.08217e-0054.01803e-0054.01518e-0054.05936e-0053.79425e-0053.72298e-0052.42165e-0052.24491e-0053.51631e-0053.40371e-0053.37805e-0053.37805e-0053.34242e-0053.34242e-0053.44789e-0053.08300e-0052.17221e-0052.28339e-0053.46500e-0053.65884e-005
+1.85.7041824.65033.73296e-0053.51346e-0053.42509e-0053.33529e-0053.50633e-0053.61893e-0053.36237e-0052.26914e-0052.52855e-0053.60895e-0053.94248e-0053.94248e-0054.03798e-0054.01518e-0053.91255e-0054.00662e-0053.76432e-0053.68450e-0052.25203e-0052.21070e-0053.44504e-0053.30393e-0053.29538e-0053.29538e-0053.29110e-0053.29110e-0053.30251e-0053.11864e-0052.07102e-0051.99262e-0053.34812e-0053.48067e-005
+1.44.8877618.81653.46785e-0053.20131e-0053.22554e-0053.35809e-0053.42936e-0053.53626e-0053.24834e-0052.17792e-0052.46868e-0053.74436e-0053.98382e-0054.03085e-0054.13348e-0053.95103e-0053.92823e-0053.89687e-0053.70873e-0053.56049e-0052.04393e-0052.16509e-0053.22411e-0053.24977e-0053.31961e-0053.31961e-0053.02742e-0053.02742e-0053.20416e-0053.00461e-0052.07244e-0051.86434e-0053.14144e-0053.44219e-005
+1.04.1644113.22453.34812e-0053.25404e-0053.17280e-0053.35524e-0053.39658e-0053.61038e-0053.34384e-0052.25773e-0052.38031e-0053.68735e-0053.84841e-0053.81135e-0053.94248e-0053.99094e-0053.91683e-0053.79852e-0053.75719e-0053.46927e-0052.13373e-0052.01115e-0053.32389e-0053.32816e-0053.20273e-0053.20273e-0053.15855e-0053.15855e-0053.20558e-0052.91624e-0052.19502e-0051.81731e-0053.11864e-0053.21984e-005
+0.63.483447.715813.33101e-0053.23837e-0053.26260e-0053.16425e-0053.44932e-0053.43506e-0053.27828e-0052.19217e-0052.47724e-0053.70445e-0053.88832e-0053.69590e-0053.88262e-0053.67309e-0053.84556e-0053.77002e-0053.81278e-0053.40085e-0052.26058e-0052.17934e-0053.21699e-0053.20416e-0053.26830e-0053.26830e-0053.22981e-0053.22981e-0053.04737e-0052.83072e-0052.13658e-0051.79450e-0052.85638e-0053.29110e-005
+0.22.964382.278663.29395e-0053.16140e-0053.28968e-0053.11579e-0053.26972e-0053.25404e-0053.09013e-0052.20927e-0052.36321e-0053.61608e-0053.91968e-0053.84556e-0053.68592e-0053.93821e-0053.66169e-0053.75006e-0053.55479e-0053.20843e-0052.20927e-0052.21355e-0053.25832e-0053.32674e-0053.08871e-0053.08871e-0053.02457e-0053.02457e-0053.03597e-0052.74662e-0052.09525e-0051.97552e-0052.94190e-0053.14857e-005
-0.22.55121-3.168683.20131e-0053.04737e-0053.10296e-0053.18278e-0053.20701e-0053.26687e-0053.19561e-0052.19502e-0052.38316e-0053.71870e-0053.74579e-0053.89830e-0053.87122e-0053.73438e-0053.75291e-0053.77572e-0053.59898e-0053.23694e-0052.17792e-0052.19502e-0053.13004e-0053.19988e-0053.02884e-0053.02884e-0053.07873e-0053.07873e-0053.12576e-0052.74092e-0052.01543e-0051.79735e-0052.97753e-0053.30963e-005
-0.62.37697-8.562983.36237e-0053.30678e-0053.23267e-0053.02599e-0053.15997e-0053.39658e-0053.12149e-0052.18789e-0052.26059e-0053.59898e-0053.82275e-0053.78285e-0053.74579e-0053.72583e-0053.86266e-0053.64601e-0053.61893e-0053.27115e-0052.15083e-0052.07529e-0053.21128e-0053.14714e-0053.26830e-0053.26830e-0053.05877e-0053.05877e-0052.97325e-0052.82502e-0052.02968e-0051.81445e-0052.98608e-0053.31391e-005
-1.02.28913-13.99173.21414e-0053.18990e-0053.31961e-0053.09298e-0053.32389e-0053.42651e-0053.15712e-0052.21925e-0052.15654e-0053.44789e-0053.89972e-0053.88404e-0053.89117e-0053.63176e-0053.63461e-0053.76717e-0053.46072e-0053.25832e-0052.25346e-0051.99690e-0053.20558e-0053.23979e-0053.15142e-0053.15142e-0053.10866e-0053.10866e-0053.24122e-0052.88631e-0052.05249e-0051.88002e-0053.11151e-0053.18848e-005
-1.42.43755-19.54513.42794e-0053.20131e-0053.23267e-0053.26117e-0053.21271e-0053.25832e-0053.08158e-0052.23635e-0052.35466e-0053.41796e-0053.86124e-0053.83986e-0053.75576e-0053.85981e-0053.86124e-0053.55194e-0053.47355e-0053.37947e-0052.30762e-0051.90140e-0053.28398e-0053.09583e-0053.28968e-0053.28968e-0052.93620e-0052.93620e-0053.13004e-0052.94617e-0052.17934e-0051.88002e-0052.86350e-0053.27970e-005
-1.82.93624-25.28373.42508e-0053.29395e-0053.27543e-0053.42936e-0053.39800e-0053.49778e-0053.37377e-0052.30049e-0052.27056e-0053.69020e-0053.93963e-0054.04083e-0053.76146e-0053.87264e-0053.81705e-0053.66882e-0053.63461e-0053.55051e-0052.24633e-0051.94844e-0053.11721e-0053.27828e-0053.22411e-0053.22411e-0053.28398e-0053.28398e-0053.32389e-0053.09583e-0052.16651e-0052.00402e-0053.17993e-0053.36950e-005
-2.23.73581-31.32113.49208e-0053.47070e-0053.57189e-0053.51773e-0053.39373e-0053.53484e-0053.34099e-0052.31332e-0052.32330e-0053.75434e-0054.02800e-0054.05366e-0053.91540e-0054.06934e-0053.77429e-0053.83273e-0053.90257e-0053.59470e-0052.30620e-0052.11663e-0053.41226e-0053.41083e-0053.32959e-0053.32959e-0053.39658e-0053.39658e-0053.37235e-0053.12862e-0052.30477e-0052.10522e-0053.30251e-0053.58615e-005
-2.64.67701-37.80673.67452e-0053.67024e-0053.56334e-0053.66169e-0053.71443e-0053.71158e-0053.79140e-0052.47581e-0052.54280e-0053.95816e-0054.37293e-0054.28171e-0054.23753e-0054.02800e-0054.10640e-0054.04226e-0054.01803e-0053.92253e-0052.50574e-0052.31902e-0053.39658e-0053.47355e-0053.50490e-0053.50490e-0053.30963e-0053.30963e-0053.46500e-0053.17423e-0052.27199e-0052.25061e-0053.56192e-0053.83273e-005
-3.05.89761-44.79453.97527e-0053.76432e-0053.81848e-0053.74009e-0053.77857e-0053.61893e-0053.83131e-0052.49577e-0052.61264e-0054.05794e-0054.31164e-0054.42710e-0054.22185e-0054.25036e-0054.29454e-0054.20189e-0053.99094e-0054.02373e-0052.51287e-0052.42307e-0053.85696e-0053.71158e-0053.76146e-0053.76146e-0053.55479e-0053.55479e-0053.71728e-0053.45787e-0052.26629e-0052.44730e-0053.75861e-0053.94533e-005


3) Energy Efficiencies or Quantum Efficiencies

Energy/Quantum efficiencies are calculated using below formula:
QE = -0.0214*alog10(Energy)^3 + 0.074*alog10(Energy)^2 - 0.0594*alog10(Energy) + 0.8875

Same Energy table was used for both EAS1 and EAS2 sensors during ground calibration work.
Below table shows the energies and corresponding quantum efficiencies used in ground calibrations.

Energy (eV)Quantum Efficiency
1.06597880.885908
1.21826160.882937
1.39229890.880427
1.59119870.878353
1.81851280.876689
2.07830020.875411
2.37520030.874494
2.71451470.873912
3.10230260.87364
3.54548860.873654
4.05198720.873928
4.63084220.874437
5.29239130.875157
6.04844710.876062
6.91251090.877127
7.90001250.878328
9.02858640.879638
10.3183840.881034
11.7924390.88249
13.4770720.88398
15.4023690.885481
17.6027070.886966
20.1173780.888412
22.9912890.889792
26.2757630.891082
30.0294420.892256
34.3193590.893291
39.2221260.89416
44.8252870.894839
51.2289010.895302
58.5473180.895525
66.9112170.895482
76.4699630.895149
87.3942490.8945
99.8791350.893511
114.147580.892155
130.454390.89041
149.090730.888248
170.389400.885646
194.730730.882577
222.549410.879018
254.342190.874943
290.676790.870327
332.202030.865145
379.659450.859372
433.896550.852983
495.881770.845952
566.721980.838256
647.682310.829868
740.208370.820764
845.952390.810919
966.802730.800307
1104.91740.788904
1262.76280.776685
1443.15750.763624
1649.32280.749696
1884.94030.734877
2154.21750.719142
2461.96290.702465
2813.67190.684821
3215.62500.666185
3675.00000.646533
4200.00000.625838
4800.00000.604077







4) Corrections to Anodes 23 to 26

Anodes 23 to 26 were affected by (noise) in the ground calibrations and these have been corrected by linear interpolation along elevations. These corrected GF values are used in further calibrating for in-flight elevation values..

Computer Hope

Computer Hope