--- a/system_settings/optic_input_example_lidar.py Fri May 29 17:45:14 2020 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,192 +0,0 @@
-# This Python script will be executed from within the main lidar_correction_ghk.py
-# Probably it will be better in the future to let the main script rather read a conguration file,
-# which might improve the portability of the code within an executable.
-# Due to problems I had with some two letter variables, most variables are now with at least
-# three letters mixed small and capital.
-# Error calculation?
-# False: only calculate the GHK-parameters. True: calculate also errors. Can take a long time.
-Error_Calc = True
-
-# Header to identify the lidar system
-#
-EID = "xx" # Earlinet station ID
-LID = "example lidar" # Additional lidar ID (short descriptive text)
-print(" Lidar system :", EID, ", ", LID)
-
-# +++ IL Laser beam polarisation and +-Uncertainty
-DOLP, dDOLP, nDOLP = 0.995, 0.005, 1 #degree of linear polarization; default 1
-RotL, dRotL, nRotL = 0., 2., 1 #alpha; rotation of laser polarization in degrees; default 0
-
-# +++ ME Emitter optics and +-Uncertainty; default = no emitter optics
-DiE, dDiE, nDiE = 0.0, 0.1, 0 # Diattenuation; default 0
-TiE = 1.0 # Unpolarized transmittance; default 1
-RetE, dRetE, nRetE = 0., 180., 0 # Retardance in degrees; default 0
-RotE, dRotE, nRotE = 0., 1., 0 # beta: Rotation of optical element in degrees; default 0
-
-# +++ MO Receiver optics including telescope
-DiO, dDiO, nDiO = 0.0, 0.2, 1 # Diattenuation; default 0
-TiO = 1.0 # Unpolarized transmittance; default 1
-RetO, dRetO, nRetO = 0., 180., 0 # Retardance in degrees; default 0
-RotO, dRotO, nRotO = 0., 0.1, 0 #gamma: Rotation of the optical element in degrees; default 0
-
-# +++++ PBS MT Transmitting path defined with TS, TP, PolFilter extinction ratio ERaT, and +-Uncertainty
-# --- Polarizing beam splitter transmitting path
-TP, dTP, nTP = 0.95, 0.01, 1 # transmittance of the PBS for parallel polarized light
-TS, dTS, nTS = 0.005, 0.001, 1 # transmittance of the PBS for cross polarized light
-RetT, dRetT, nRetT = 0.0, 180., 0 # Retardance in degrees
-# --- Pol.Filter behind transmitted path of PBS
-ERaT, dERaT, nERaT = 0.001, 0.001, 0 # Extinction ratio
-RotaT, dRotaT, nRotaT = 0., 1., 0 # Rotation of the Pol.-filter in degrees; usually close to 0° because TP >> TS, but for PollyXTs it can also be close to 90°
-# --
-TiT = 0.5 * (TP + TS) # do not change this
-DiT = (TP-TS)/(TP+TS) # do not change this
-DaT = (1-ERaT)/(1+ERaT) # do not change this
-TaT = 0.5*(1+ERaT) # do not change this
-
-# +++++ PBS MR Reflecting path defined with RS, RP, and cleaning PolFilter extinction ratio ERaR and +-Uncertainty
-# ---- for PBS without absorption the change of RS and RP must depend on the change of TP and TS. Hence the values and uncertainties are not independent.
-RS_RP_depend_on_TS_TP = True
-# --- Polarizing beam splitter reflecting path
-if(RS_RP_depend_on_TS_TP):
- RP, dRP, nRP = 1-TP, 0.00, 0 # do not change this
- RS, dRS, nRS = 1-TS, 0.00, 0 # do not change this
-else:
- RP, dRP, nRP = 0.05, 0.01, 1 # change this if RS_RP_depend_on_TS_TP = False; reflectance of the PBS for parallel polarized light
- RS, dRS, nRS = 0.98, 0.01, 1 # change this if RS_RP_depend_on_TS_TP = False; reflectance of the PBS for cross polarized light
-RetR, dRetR, nRetR = 0.0, 180., 0 # Retardance in degrees
-# --- Pol.Filter behind reflected path of PBS
-ERaR, dERaR, nERaR = 0.001, 0.001, 1 # Extinction ratio
-RotaR, dRotaR, nRotaR = 90., 1., 1 # Rotation of the Pol.-filter in degrees; usually 90° because RS >> RP, but for PollyXTs it can also be 0°
-# --
-TiR = 0.5 * (RP + RS) # do not change this
-DiR = (RP-RS)/(RP+RS) # do not change this
-DaR = (1-ERaR)/(1+ERaR) # do not change this
-TaR = 0.5*(1+ERaR) # do not change this
-# NEW --- Additional ND filter transmission (attenuation) during the calibration
-TCalT, dTCalT, nTCalT = 1, 0.01, 0 # transmitting path, default 1, 0, 0
-TCalR, dTCalR, nTCalR = 0.1, 0.001, 1 # reflecting path, default 1, 0, 0
-
-# +++ Orientation of the PBS with respect to the reference plane (see Improvements_of_lidar_correction_ghk_ver.0.9.8_190124.pdf)
-# Y = +1: polarisation in reference plane is finally transmitted,
-# Y = -1: polarisation in reference plane is finally reflected.
-Y = +1.
-
-# +++ Calibrator
-
-# --- Calibrator Type used; defined by matrix values below
-TypeC = 3 #Type of calibrator: 1 = mechanical rotator; 2 = hwp rotator (fixed retardation); 3 = linear polarizer; 4 = qwp; 5 = circular polarizer; 6 = real HWP calibration +-22.5°
-
-# --- Calibrator Location
-LocC = 3 #location of calibrator: 1 = behind laser; 2 = behind emitter; 3 = before receiver; 4 = before PBS
-# --- MC Calibrator parameters
-if TypeC == 1: #mechanical rotator
- DiC, dDiC, nDiC = 0., 0., 0 # Diattenuation
- TiC = 1.
- RetC, dRetC, nRetC = 0., 0., 0 # Retardance in degrees
- RotC, dRotC, nRotC = 0., 0.1, 1 #constant calibrator rotation offset epsilon
- # Rotation error without calibrator: if False, then epsilon = 0 for normal measurements
- RotationErrorEpsilonForNormalMeasurements = True # is in general True for TypeC == 1 calibrator
-elif TypeC == 2: # HWP simulated by rotator without retardance!
- DiC, dDiC, nDiC = 0., 0., 0 # Diattenuation; ideal 0.0
- TiC = 1.
- RetC, dRetC, nRetC = 180., 0., 0 # Retardance in degrees
- #NOTE: use here twice the HWP-rotation-angle
- RotC, dRotC, nRotC = 0.0, 0.1, 1 #constant calibrator rotation offset epsilon
- RotationErrorEpsilonForNormalMeasurements = True # is in general True for TypeC == 2 calibrator
-elif TypeC == 3: # linear polarizer calibrator. Diattenuation DiC = (1-ERC)/(1+ERC); ERC = extinction ratio of calibrator
- DiC, dDiC, nDiC = 0.9998, 0.00019, 1 # Diattenuation; ideal 1.0
- TiC = 0.4 # ideal 0.5
- RetC, dRetC, nRetC = 0., 180., 3 # Retardance in degrees
- RotC, dRotC, nRotC = 0.0, 0.1, 0 #constant calibrator rotation offset epsilon
- RotationErrorEpsilonForNormalMeasurements = False # is in general False for TypeC == 3 calibrator
-elif TypeC == 4: # QWP calibrator
- DiC, dDiC, nDiC = 0.0, 0., 0 # Diattenuation; ideal 0.0
- TiC = 1.0 # ideal 0.5
- RetC, dRetC, nRetC = 90., 0., 0 # Retardance in degrees
- RotC, dRotC, nRotC = 0.0, 0.1, 1 #constant calibrator rotation offset epsilon
- RotationErrorEpsilonForNormalMeasurements = False # is False for TypeC == 4 calibrator
-elif TypeC == 6: # real half-wave plate rotator calibration at +-22.5° => rotated_diattenuator_X22x5deg.odt
- DiC, dDiC, nDiC = 0., 0., 0 # Diattenuation; ideal 0.0
- TiC = 1.
- RetC, dRetC, nRetC = 180., 0., 0 # Retardance in degrees
- #Note: use real HWP angles here
- RotC, dRotC, nRotC = 0.0, 0.1, 1 #constant calibrator rotation offset epsilon
- RotationErrorEpsilonForNormalMeasurements = True # is in general True for TypeC == 6 calibrator
-else:
- print ('calibrator not implemented yet')
- sys.exit()
-
-# --- LDRCal assumed atmospheric linear depolarization ratio during the calibration measurements in calibration range with almost clean air (first guess)
-LDRCal,dLDRCal,nLDRCal= 0.2, 0.15, 1 # spans most of the atmospheric depolarisation variability
-# LDRCal,dLDRCal,nLDRCal= 0.009, 0.005, 1 # spans the interference filter influence
-
-# ====================================================
-# NOTE: there is no need to change anything below.
-# ====================================================
-# !!! don't change anything in this section !!!
-# NEW ***
-bPlotEtax = False # plot error histogramms for Etax
-
-# *** Only for signal noise errors ***
-nNCal = 0 # error nNCal, calibration signals: one-sigma in steps to left and right
-nNI = 0 # error nNI, 0° signals: one-sigma in steps to left and right; NI signals are calculated from NCalT and NCalR in main programm, but noise is assumed to be independent.
-
-# --- number of photon counts in the signal summed up in the calibration range during the calibration measurements
-NCalT = 28184 # default 1e6, assumed the same in +45° and -45° signals
-NCalR = 28184 # default 1e6, assumed the same in +45° and -45° signals
-NILfac = 2 # (relative duration (laser shots) of standard (0°) measurement to calibration measurements) * (range of std. meas. smoothing / calibration range); example: 100000#/5000# * 100/1000 = 2
- # LDRmeas below will be used to calculate IR and IT of 0° signals.
-# calculate signal counts only from parallel 0° signal assuming the same electronic amplification in both channels; overwrites above values
-CalcFrom0deg = True
-NI = 1e5 #number of photon counts in the parallel 0°-signal
-
-if(CalcFrom0deg):
- # either eFactT or eFacR is = 1 => rel. amplification
- eFacT = 1 # rel. amplification of transmitted channel, approximate values are sufficient; def. = 1
- eFacR = 10 # rel. amplification of reflected channel, approximate values are sufficient; def. = 1
- NILfac = 2 # (relative duration (laser shots) of standard (0°) measurement to calibration measurements) * (range of std. meas. smoothing / calibration range); example: 100000#/5000# * 100/1000 = 2
-
- NCalT = NI / NILfac * TCalT * eFacT # photon counts in transmitted signal during calibration
- NCalR = NI / NILfac * TCalR * eFacR # photon counts in reflected signal during calibration
- # LDRmeas below will be used to calculate IR and IT of 0° signals.
-# NEW *** End of signal noise error parameters ***
-
-
-# --- LDRtrue for simulation of measurement => LDRsim
-LDRtrue = 0.4
-LDRtrue2 = 0.004
-
-# --- measured LDRm will be corrected with calculated parameters GHK
-LDRmeas = 0.3
-
-# --- this is just for correct transfer of the variables to the main file
-DOLP0, dDOLP, nDOLP = DOLP, dDOLP, nDOLP
-RotL0, dRotL, nRotL = RotL, dRotL, nRotL
-# Emitter
-DiE0, dDiE, nDiE = DiE, dDiE, nDiE
-RetE0, dRetE, nRetE = RetE, dRetE, nRetE
-RotE0, dRotE, nRotE = RotE, dRotE, nRotE
-# Receiver
-DiO0, dDiO, nDiO = DiO, dDiO, nDiO
-RetO0, dRetO, nRetO = RetO, dRetO, nRetO
-RotO0, dRotO, nRotO = RotO, dRotO, nRotO
-# Calibrator
-DiC0, dDiC, nDiC = DiC, dDiC, nDiC
-RetC0, dRetC, nRetC = RetC, dRetC, nRetC
-RotC0, dRotC, nRotC = RotC, dRotC, nRotC
-# PBS
-TP0, dTP, nTP = TP, dTP, nTP
-TS0, dTS, nTS = TS, dTS, nTS
-RetT0, dRetT, nRetT = RetT, dRetT, nRetT
-
-ERaT0, dERaT, nERaT = ERaT, dERaT, nERaT
-RotaT0,dRotaT,nRotaT= RotaT,dRotaT,nRotaT
-
-RP0, dRP, nRP = RP, dRP, nRP
-RS0, dRS, nRS = RS, dRS, nRS
-RetR0, dRetR, nRetR = RetR, dRetR, nRetR
-
-ERaR0, dERaR, nERaR = ERaR, dERaR, nERaR
-RotaR0,dRotaR,nRotaR= RotaR,dRotaR,nRotaR
-
-LDRCal0,dLDRCal,nLDRCal=LDRCal,dLDRCal,nLDRCal
\ No newline at end of file
