File name: Pandora243s1_Toronto-CNTower_20260321_L2Fit_fout2c7d20250508p1-8.txt File generation date: 20260322T053611.9Z Data description: Level 2 spectral fitting results file Data file version: fout2c7p1-8 Local principal investigator: Vitali Fioletov Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 243 Spectrometer number: 1 Processing software version used: BlickP v1.8.88 Instrument operation file used: Pandora243_OF_v3d20230125.txt Instrument calibration file used: Pandora243s1_CF_v7d20250508.txt Level 1 file used: Pandora243s1_Toronto-CNTower_20260321_L1_smca1c7d20250508p1-8.txt Full location name: CN Tower Observation Pod Roof, 290 Bremner Blvd, Toronto, ON M5V 3L9 Short location name: Toronto-CNTower Country of location: Canada Location latitude [deg]: 43.6426 Location longitude [deg]: -79.3871 Location altitude [m]: 330 Local noon date: 20260321 Notes on s-number (L1 configuration): Corrections NOT applied although requested by the s-number are dark map for dark correction (replaced by immediate dark method), latency correction, matrix method stray light correction (replaced by simple method) Data caveats: None First and last pixel inside fitting window: 197 339 Nominal wavelengths inside fitting window [nm]: 305.1143 305.2548 305.3953 305.5359 305.6764 305.8169 305.9573 306.0978 306.2383 306.3787 306.5192 306.6596 306.8000 306.9404 307.0808 307.2212 307.3615 307.5019 307.6422 307.7826 307.9229 308.0632 308.2035 308.3438 308.4841 308.6243 308.7646 308.9048 309.0451 309.1853 309.3255 309.4657 309.6059 309.7461 309.8863 310.0264 310.1666 310.3067 310.4468 310.5869 310.7270 310.8671 311.0072 311.1472 311.2873 311.4273 311.5674 311.7074 311.8474 311.9874 312.1274 312.2674 312.4073 312.5473 312.6872 312.8271 312.9671 313.1070 313.2469 313.3868 313.5266 313.6665 313.8063 313.9462 314.0860 314.2258 314.3656 314.5054 314.6452 314.7850 314.9247 315.0645 315.2042 315.3439 315.4837 315.6234 315.7630 315.9027 316.0424 316.1820 316.3217 316.4613 316.6010 316.7406 316.8802 317.0197 317.1593 317.2989 317.4384 317.5780 317.7175 317.8570 317.9965 318.1360 318.2755 318.4150 318.5545 318.6939 318.8334 318.9728 319.1122 319.2516 319.3910 319.5304 319.6698 319.8091 319.9485 320.0878 320.2271 320.3664 320.5057 320.6450 320.7843 320.9236 321.0628 321.2021 321.3413 321.4805 321.6197 321.7589 321.8981 322.0373 322.1765 322.3156 322.4547 322.5939 322.7330 322.8721 323.0112 323.1503 323.2893 323.4284 323.5675 323.7065 323.8455 323.9845 324.1235 324.2625 324.4015 324.5405 324.6794 324.8184 324.9573 --------------------------------------------------------------------------------------- Column 1: Two letter code of measurement routine Column 2: UT date and time for center-time of measurement, yyyymmddThhmmssZ (ISO 8601) Column 3: Fractional days since 1-Jan-2000 midnight for center-time of measurement Column 4: Routine count (1 for the first routine of the day, 2 for the second, etc.) Column 5: Repetition count (1 for the first set in the routine, 2 for the second, etc.) Column 6: Total duration of measurement set in seconds Column 7: Data processing type index Column 8: Solar zenith angle for center-time of measurement in degree Column 9: Solar azimuth for center-time of measurement in degree, 0=north, increases clockwise Column 10: Lunar zenith angle for center-time of measurement in degree Column 11: Lunar azimuth for center-time of measurement in degree, 0=north, increases clockwise Column 12: Pointing zenith angle in degree, absolute or relative (see next column), 999=tracker not used Column 13: Zenith pointing mode: zenith angle is... 0=absolute, 1=relative to sun, 2=relative to moon Column 14: Pointing azimuth in degree, increases clockwise, absolute (0=north) or relative (see next column), 999=tracker not used Column 15: Azimuth pointing mode: like zenith angle mode but also fixed scattering angles relative to sun (3) or moon (4) Column 16: Fitting result index: 0=no error or warning, 1, 2=warning, >2=error Column 17: Number of function evaluations used, 0=linear fitting or fitting not successful or no fitting done Column 18: rms of unweighted fitting residuals, -9=fitting not successful Column 19: Normalized rms of fitting residuals weighted with independent uncertainty, -9=fitting not successful or no uncertainty used Column 20: Expected rms based on independent uncertainty, -9=fitting not successful or no uncertainty given Column 21: Expected normalized weighted rms based on independent uncertainty, -9=fitting not successful or no uncertainty given Column 22: Ozone slant column amount [moles per square meter], -9e99=fitting not successful Column 23: Independent uncertainty of ozone slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -5=no independent uncertainty input was given, -9=spectral fitting not successful Column 24: Structured uncertainty of ozone slant column amount [moles per square meter], -7=not given since method "MEAS" was chosen, -9=spectral fitting not successful Column 25: Common uncertainty of ozone slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -6=no common uncertainty input was given, -7=not given since method "MEAS" was chosen, -9=spectral fitting not successful Column 26: rms-based uncertainty of ozone slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no rms-based uncertainty could be retrieved, -9=spectral fitting not successful Column 27: Ozone effective temperature [K] Column 28: Independent uncertainty of ozone effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured uncertainty of it is based on f-code, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -5=no independent uncertainty input was given, -9=spectral fitting not successful Column 29: Structured uncertainty of ozone effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -9=spectral fitting not successful Column 30: Common uncertainty of ozone effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured uncertainty of it is based on f-code, -3=spectral fitting was done, but no common uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -6=no common uncertainty input was given, -9=spectral fitting not successful Column 31: Effective ozone fitting wavelength [nm], -9=fitting not successful Column 32: Diffuse correction applied before fitting at effective fitting wavelength for ozone [%], 0=no diffuse correction applied or fitting not requested, >0=measured diffuse correction, <0=(negative value of) calculated diffuse correction Column 33: Sulfur dioxide slant column amount [moles per square meter], -9e99=fitting not successful Column 34: Independent uncertainty of sulfur dioxide slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -5=no independent uncertainty input was given, -9=spectral fitting not successful Column 35: Structured uncertainty of sulfur dioxide slant column amount [moles per square meter], -7=not given since method "MEAS" was chosen, -9=spectral fitting not successful Column 36: Common uncertainty of sulfur dioxide slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -6=no common uncertainty input was given, -7=not given since method "MEAS" was chosen, -9=spectral fitting not successful Column 37: rms-based uncertainty of sulfur dioxide slant column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no rms-based uncertainty could be retrieved, -9=spectral fitting not successful Column 38: Sulfur dioxide effective temperature [K] Column 39: Independent uncertainty of sulfur dioxide effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured uncertainty of it is based on f-code, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -5=no independent uncertainty input was given, -9=spectral fitting not successful Column 40: Structured uncertainty of sulfur dioxide effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -9=spectral fitting not successful Column 41: Common uncertainty of sulfur dioxide effective temperature [K], -1=temperature fitting was requested, but cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured uncertainty of it is based on f-code, -3=spectral fitting was done, but no common uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -6=no common uncertainty input was given, -9=spectral fitting not successful Column 42: Effective sulfur dioxide fitting wavelength [nm], -9=fitting not successful Column 43: Diffuse correction applied before fitting at effective fitting wavelength for sulfur dioxide [%], 0=no diffuse correction applied or fitting not requested, >0=measured diffuse correction, <0=(negative value of) calculated diffuse correction Column 44: Molecular scattering air mass factor used for molecular scattering subtraction before the fitting Column 45: Estimated uncertainty of molecular scattering air mass factor, -9=molecular scattering was not subtracted before the fitting Column 46: Lower limit used for wavelength scaling [nm] Column 47: Upper limit used for wavelength scaling [nm] Column 48: Order of smoothing polynomial Column 49: Smoothing polynomial coefficient, order 0 Column 50: Independent uncertainty of smoothing polynomial coefficient, order 0, -9=fitting not successful Column 51: Structured uncertainty of smoothing polynomial coefficient, order 0, -9=fitting not successful Column 52: Common uncertainty of smoothing polynomial coefficient, order 0, -9=fitting not successful Column 53: rms-based uncertainty of smoothing polynomial coefficient, order 0, -9=fitting not successful Column 54: Smoothing polynomial coefficient, order 1 Column 55: Independent uncertainty of smoothing polynomial coefficient, order 1, -9=fitting not successful Column 56: Structured uncertainty of smoothing polynomial coefficient, order 1, -9=fitting not successful Column 57: Common uncertainty of smoothing polynomial coefficient, order 1, -9=fitting not successful Column 58: rms-based uncertainty of smoothing polynomial coefficient, order 1, -9=fitting not successful Column 59: Smoothing polynomial coefficient, order 2 Column 60: Independent uncertainty of smoothing polynomial coefficient, order 2, -9=fitting not successful Column 61: Structured uncertainty of smoothing polynomial coefficient, order 2, -9=fitting not successful Column 62: Common uncertainty of smoothing polynomial coefficient, order 2, -9=fitting not successful Column 63: rms-based uncertainty of smoothing polynomial coefficient, order 2, -9=fitting not successful Column 64: Smoothing polynomial coefficient, order 3 Column 65: Independent uncertainty of smoothing polynomial coefficient, order 3, -9=fitting not successful Column 66: Structured uncertainty of smoothing polynomial coefficient, order 3, -9=fitting not successful Column 67: Common uncertainty of smoothing polynomial coefficient, order 3, -9=fitting not successful Column 68: rms-based uncertainty of smoothing polynomial coefficient, order 3, -9=fitting not successful Column 69: Mean value of measured data inside fitting window [same units as measurements] Column 70: Wavelength change polynomial coefficient, order 0 Column 71: Independent uncertainty of wavelength change polynomial coefficient, order 0, -9=fitting not successful Column 72: Structured uncertainty of wavelength change polynomial coefficient, order 0, -9=fitting not successful Column 73: Common uncertainty of wavelength change polynomial coefficient, order 0, -9=fitting not successful Column 74: rms-based uncertainty of wavelength change polynomial coefficient, order 0, -9=fitting not successful Column 75: L1 based wavelength change coefficient, order 0, -9=no L1 wavelength change determination Column 76: L1 based wavelength change coefficient, order 1, -9=no L1 wavelength change determination Column 77: L2Fit data quality flag: 0=assured high quality, 1=assured medium quality, 2=assured low quality, 10=not-assured high quality, 11=not-assured medium quality, 12=not-assured low quality Column 78: Sum over 2^i using those i, for which the corresponding L2Fit data quality parameter exceeds the DQ1 limit, 0=L1 data quality above 0, 1=Spectral fitting was not successful, 2=Wavelength shift too large, 3=Normalized rms of fitting residuals weighted with independent uncertainty too large Column 79: Sum over 2^i using those i, for which the corresponding L2Fit data quality parameter exceeds the DQ2 limit (same parameters as for DQ1) Column 80: L1 data quality flag: 0=assured high quality, 1=assured medium quality, 2=assured low quality, 10=not-assured high quality, 11=not-assured medium quality, 12=not-assured low quality Column 81: Sum over 2^i using those i, for which the corresponding L1 data quality parameter exceeds the DQ1 limit, 0=Saturated data, 1=Too few dark counts measurements, 2=No temperature given or effective temperature too different from the reference temperature, 3=Dark count too high, 4=Unsuccessful dark background fitting, 5=The dark count differs significantly from the dark map for too many pixels, 6=Absolute value of estimated average residual stray light level too high, 7=Although attempted, no wavelength change could be retrieved, 8=Absolute value of retrieved wavelength shift too large, 9=Retrieved wavelength shift differs too much from the shift predicted by the effective temperature Column 82: Sum over 2^i using those i, for which the corresponding L1 data quality parameter exceeds the DQ2 limit (same parameters as for DQ1) Column 83: Atmospheric variability [%], 999=no atmospheric variability was determined Column 84: Wavelength effective temperature [°C], 999=no effective temperature given Column 85: Estimated average residual stray light level [%] (only valid for stray light correction methods 2 and higher) Column 86: Retrieved wavelength shift from L1 data [nm], -9=no wavelength change determination Column 87: Retrieved total wavelength shift [nm], -9=no wavelength change fitting Column 88: Number of bright count cycles Column 89: Number of dark count cycles Column 90: Effective position of filterwheel #1, 0=filterwheel not used, 1-9 are valid positions Column 91: Effective position of filterwheel #2, 0=filterwheel not used, 1-9 are valid positions Column 92: Sum over 2^i, 0=spectra were interpolated in time, 1=spectra are corrected for off-target signal Column 93: Integration time [ms] Column 94: Temperature at electronics board [°C], 999=no temperature signal Column 95: Spectrometer control temperature [°C], 999=no temperature signal Column 96: Auxiliary spectrometer temperature [°C], 999=no temperature signal Column 97: Temperature in head sensor [°C], 999=no temperature signal Column 98: Humidity in head sensor [%], -9=no humidity signal Column 99: Pressure in head sensor [hPa], -9=no pressure signal Columns 100-242: Unweighted slant column residuals for each pixel inside the fitting window multiplied by 1e5, 9e5=pixel was not used for fitting Columns 243-385: Normalized slant column residuals weighted with independent instrumental uncertainty for each pixel inside the fitting window multiplied by 1e5, 9e5=pixel was not used for fitting, 0=no independent instrumental uncertainty was given --------------------------------------------------------------------------------------- SS 20260321T135828.1Z 9576.582270 150 1 30.22 2 62.97 118.44 73.09 83.12 0.00 1 0.00 1 0 25 2.417e-02 5.505e-03 1.845e-02 3.417e-03 3.354367e-01 1.691147e-03 4.041088e-03 -6.000000e+00 1.361910e-02 226.15 -2.00 3.56 -2.00 318.28 0.00e+00 8.784968e-04 3.115525e-04 1.022702e-04 -6.000000e+00 5.850976e-04 273.80 -2.00 20.00 -2.00 317.72 0.00e+00 2.188 0.000 302.00 328.00 3 5.3776e+00 4.5311e-03 2.7319e-02 -6.0000e+00 3.3814e-02 6.1477e-02 5.1475e-03 1.7348e-02 -6.0000e+00 3.6847e-02 -1.0860e-02 3.4243e-03 8.6429e-03 -6.0000e+00 2.1858e-02 -5.8706e-04 1.7891e-03 2.5914e-03 -6.0000e+00 9.2546e-03 1.8981e-04 -2.8773e-04 9.7113e-05 2.6492e-05 -6.0000e+00 6.4634e-04 -1.9490e-03 0.0000e+00 10 0 0 10 0 0 99.89 27.04 0.52 -0.00195 -0.00411 13 13 1 5 0 2324.510 35.50 20.00 27.04 10.45 3.7 845.53 1774 -1564 -14724 -1714 -10814 4332 -877 -7573 5814 -2309 -12101 -6969 -1313 -1094 -2757 1906 -2178 -2276 602 -974 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-308 312 -390 -456 -774 454 -138 -60 1248 743 488 -256 176 57 201 -651 296 -431 -304 -393 123 577 33 229 533 468 790 762 221 180 -215 -135 -537 351 239 -255 467 27 -842 -623 -336 SS 20260321T150112.0Z 9576.625833 196 1 29.54 2 53.76 133.40 61.94 93.24 0.00 1 0.00 1 0 17 8.021e-03 4.922e-03 4.468e-03 1.740e-03 2.567719e-01 8.662736e-04 3.140328e-03 -6.000000e+00 4.519516e-03 226.16 -2.00 3.56 -2.00 316.82 0.00e+00 2.886403e-04 1.087858e-04 6.220595e-05 -6.000000e+00 1.941500e-04 273.81 -2.00 20.00 -2.00 316.25 0.00e+00 1.687 0.000 302.00 328.00 3 4.9470e+00 2.2620e-03 2.0975e-02 -6.0000e+00 1.1221e-02 3.7294e-02 2.5417e-03 1.3215e-02 -6.0000e+00 1.2228e-02 -1.7408e-03 1.5060e-03 6.5549e-03 -6.0000e+00 7.2534e-03 -3.6830e-03 7.2682e-04 1.8662e-03 -6.0000e+00 3.0714e-03 5.3657e-04 -1.5639e-04 4.8940e-05 2.1299e-05 -6.0000e+00 2.1446e-04 -2.5885e-03 0.0000e+00 10 0 0 10 0 0 99.98 27.11 0.50 -0.00259 -0.00376 28 28 1 5 0 1054.720 35.50 20.00 27.11 10.88 3.7 849.04 -1879 -893 -3959 -1932 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665 405 80 92 270 98 169 -309 785 829 449 -545 -689 -419 -192 -432 -426 -800 -996 -391 123 289 540 456 230 -50 -168 82 289 11 -123 2 317 -96 386 824 477 -4 838 696 680 452 -261 211 70 -303 243 -2 297 -114 -8 -126 -554 -763 -647 SS 20260321T151110.5Z 9576.632761 199 1 29.87 2 52.47 136.07 60.16 94.94 0.00 1 0.00 1 0 17 9.089e-03 4.966e-03 3.932e-03 1.645e-03 2.491064e-01 8.180517e-04 3.067241e-03 -6.000000e+00 5.121284e-03 226.16 -2.00 3.56 -2.00 316.66 0.00e+00 1.974721e-04 9.839566e-05 4.986651e-05 -6.000000e+00 2.199843e-04 273.81 -2.00 20.00 -2.00 316.10 0.00e+00 1.638 0.000 302.00 328.00 3 4.9167e+00 2.1333e-03 2.0380e-02 -6.0000e+00 1.2716e-02 3.9822e-02 2.3940e-03 1.2863e-02 -6.0000e+00 1.3855e-02 -4.8327e-03 1.4092e-03 6.3736e-03 -6.0000e+00 8.2190e-03 -1.3829e-03 6.7431e-04 1.8037e-03 -6.0000e+00 3.4805e-03 5.8712e-04 -6.5322e-05 4.6151e-05 2.0718e-05 -6.0000e+00 2.4299e-04 -3.1398e-03 0.0000e+00 10 0 0 10 0 0 99.94 27.12 0.53 -0.00314 -0.00363 35 35 1 5 0 853.430 35.50 20.01 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