PPI Calibration data ----------------------------------- PPI conversion equations and coefficients resulting from most recent calibration; Useful to convert PPI L2 data to L3 data -------------------------------------- #HASI/PPI pressure calibration coefficients Feb 11 2005 # # T =[(1/(a- Y))-b]/c # # T in degrees Celsius [deg C] # # [Sensor channel, a, b ,c] 13T,0.95520,4.34272,0.0239358 23T,0.94665,3.35377,0.0182452 33T,0.92365,2.52352,0.0137031 # # y_c = Y + y_off # # p = \sum_{i=1}^3 \sum_{j=1}^3 a_{ij} T^{j-1} (A - y_c)^{-i} + \sum_{i=1}^3 \sum_{j=1}^4 K_{ij} T^{i-1} y_c^{j-1} # p in [hPa] # T in degrees Celsius, defined as before # #ch y_off A a_11 a_12 a_13 a_21 a_22 a_23 a_31 a_32 a_33 K_11 K_12 K_13 K_14 K_21 K_22 K_23 K_24 K_31 K_32 K_33 K_34 1.1 -0.00007 0.719000000 -657.429227942 -0.100342031 0.000326826 0.0 0.0 0.0 0.0 0.0 0.0 1917.589244914 101.084422102 0.0 -190.224832161 0.085946109 0.089560648 0.0 0.0 -0.000389231 0.0 0.0 0.0 1.6 -0.00007 0.714000000 -686.255126340 -0.109695236 0.000333509 0.0 0.0 0.0 0.0 0.0 0.0 2124.845234044 45.344857612 24.092514187 -493.664146932 0.090065834 0.119673487 0.0 0.0 -0.000380453 0.0 0.0 0.0 1.8 -0.00007 0.726000000 -669.461534580 -0.101388028 0.000319535 0.0 0.0 0.0 0.0 0.0 0.0 1875.879196369 159.543608947 59.172571049 -46.531329897 0.097258901 0.081547068 0.0 0.0 -0.000380038 0.0 0.0 0.0 2.1 -0.00003 0.716000000 -966.428155512 -0.133100727 -0.000019593 0.0 0.0 0.0 0.0 0.0 0.0 2509.297638563 256.292474284 132.704132295 44.985585128 0.189549766 0.122206777 0.076148017 0.001893328 0.0 0.000599493 0.001312938 0.001760405 2.7 -0.00016 0.712000000 -1080.174483083 -0.155553526 0.000344837 0.0 0.0 0.0 0.0 0.0 0.0 2768.424328802 303.534837989 168.051514499 68.962098521 0.189656425 0.163047384 0.126348058 0.0 -0.000782556 0.0 0.0 0.0 2.8 -0.00016 0.695000000 -1079.884750922 -0.155847787 -0.000062807 0.0 0.0 0.0 0.0 0.0 0.0 2760.141431252 316.151751637 178.497678992 71.010491352 0.203270515 0.174390885 0.162238146 0.097758547 0.000040707 0.000776008 0.001218297 0.001811214 3.7 -0.00030 0.809000000 88.067500693 0.018178688 -0.000014784 -3.802727572 -0.001704142 0.000002594 0.077164611 0.000059704 0.0 -107.271254293 30.393312049 32.069102695 26.692055331 0.006594045 0.0 0.0 0.0 0.000105811 0.0 0.0 0.0 3.8 -0.00030 0.805000000 73.981285762 0.010673543 0.000006087 -3.097715374 -0.001015383 0.000000880 0.059014787 0.000032967 0.0 -98.171881969 29.348805428 31.145024929 25.269798111 0.022303389 0.0 0.0 0.0 0.000083481 0.0 0.0 0.0 # # Y is the engineering value (counter) as level 2 data