== DN2TEMP.TXT == ||Category B ||Version 3.0.1 || === Description === This input file contains the parameters to convert DN values (level 0 images) into temperatures and the weighting to apply to the final solution. === Coefficients === * Cameras 1, 2, 3 do not use the coefficients. * Cameras 4 and 5 (TAGCAMs) use only the first two. * Coefficients 3 and 4 are never used. The camera's thermoresister is calculated as . T_i = DN * C1^3^ + DN * C2^2^ + DN * C3 + C4 === Weighting === There are four thermoresisters on each camera. The weights 1-4 provide how much impact each thermoresistor should have. While this example has it totaling 1.0, SPC normalizes the weighting, so it isn't needed. * N = W1 + W2 + W3 + W4 * T_final = T1 * W1/N + T2 * W2/N + T3 * W3/N + T4 * W4/N === Columns === ||Camera Number ||Coef 1 ||Coef 2 ||Coef 3 ||Coef 4 ||Weight 1 ||Weight 2 ||Weight 3 ||Weight 4 || || ||C1 ||C 2 ||C 3 ||C 4 ||W 1 ||W 2 ||W 3 ||W 4 || Here is a sample '''DN2TEMP.TXT''' file: {{{ 1 0.80168E+02 -0.69285E-01 0.23237E-04 -0.37331E-08 0.25 0.25 0.25 0.25 2 0.80168E+02 -0.69285E-01 0.23237E-04 -0.37331E-08 0.25 0.25 0.25 0.25 3 0.80168E+02 -0.69285E-01 0.23237E-04 -0.37331E-08 0.25 0.25 0.25 0.25 4 -263.15 0.15259 0 0 1.D0 0.D0 0.D0 0.D0 5 -263.15 0.15259 0 0 1.D0 0.D0 0.D0 0.D0 C NAV & NFT CAMERA HEAD TEMPERATURE PARAMETERS FROM C UA-SIS-9.4.4-322_OSIRIS-REx-NavCam-Data-Product-SIS_Rev_2.0_CCv0005.pdf C C OCAMS CAMERA HEAD TEMPERATURE PARAMETERS CALCULATED FROM C OREX-DOC-05.01-00259_OCAMS Flight SW Engineering Dictionary_Rev_C_CCv0018.pdf C Fit to DN 1200 - 3400 (TC from ~ 25 to -35) has RMS = 0.18C, MAXDEV = 0.30C C Focal length temperatures for OCAMS are linear combinations of housekeeping temperatures: C TMC = F1*MCFWHTMP+F2*MCFWMTMP+F3*MCLENTMP+F4*MCROETMP C TSC = F1*SCFWHTMP+F2*SCFWMTMP+F3*SCLENTMP+F4*SCROETMP C TPC = F1*PCFOHTMP+F2*PCFOMTMP+F3*PCMR1TMP+F4*PCROETMP C }}} ---- CategoryThreeOhOne