File name: Pandora218s1_Vientiane_20250830_L2Fit_fout2c3d20230614p1-8.txt File generation date: 20250830T171842.7Z Data description: Level 2 spectral fitting results file Data file version: fout2c3p1-8 Local principal investigator: Virasith Phomsouvanh Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 218 Spectrometer number: 1 Processing software version used: BlickP v1.8.75 Instrument operation file used: Pandora218_OF_v3d20220124.txt Instrument calibration file used: Pandora218s1_CF_v3d20230614.txt Level 1 file used: Pandora218s1_Vientiane_20250830_L1_smca1c3d20230614p1-8.txt Full location name: Laos Ministry of Natural Resources and Environment Short location name: Vientiane Country of location: Lao People's Democratic Republic Location latitude [deg]: 17.9979 Location longitude [deg]: 102.5821 Location altitude [m]: 169 Local noon date: 20250830 Notes on s-number (L1 configuration): Corrections NOT applied although requested by the s-number are latency correction, matrix method stray light correction (replaced by simple method) Data caveats: None First and last pixel inside fitting window: 201 342 Nominal wavelengths inside fitting window [nm]: 305.0591 305.2004 305.3416 305.4829 305.6241 305.7654 305.9066 306.0478 306.1890 306.3302 306.4714 306.6125 306.7537 306.8949 307.0360 307.1771 307.3182 307.4593 307.6004 307.7415 307.8826 308.0236 308.1647 308.3057 308.4467 308.5877 308.7287 308.8697 309.0107 309.1517 309.2926 309.4336 309.5745 309.7154 309.8564 309.9973 310.1381 310.2790 310.4199 310.5607 310.7016 310.8424 310.9832 311.1241 311.2649 311.4056 311.5464 311.6872 311.8279 311.9687 312.1094 312.2501 312.3908 312.5315 312.6722 312.8129 312.9536 313.0942 313.2349 313.3755 313.5161 313.6567 313.7973 313.9379 314.0785 314.2190 314.3596 314.5001 314.6407 314.7812 314.9217 315.0622 315.2026 315.3431 315.4836 315.6240 315.7645 315.9049 316.0453 316.1857 316.3261 316.4665 316.6068 316.7472 316.8875 317.0279 317.1682 317.3085 317.4488 317.5891 317.7294 317.8696 318.0099 318.1501 318.2904 318.4306 318.5708 318.7110 318.8512 318.9913 319.1315 319.2716 319.4118 319.5519 319.6920 319.8321 319.9722 320.1123 320.2524 320.3924 320.5325 320.6725 320.8125 320.9525 321.0925 321.2325 321.3725 321.5125 321.6524 321.7924 321.9323 322.0722 322.2121 322.3520 322.4919 322.6318 322.7716 322.9115 323.0513 323.1911 323.3310 323.4708 323.6106 323.7503 323.8901 324.0299 324.1696 324.3093 324.4491 324.5888 324.7285 324.8682 --------------------------------------------------------------------------------------- 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 100-241: Unweighted slant column residuals for each pixel inside the fitting window multiplied by 1e5, 9e5=pixel was not used for fitting Columns 242-383: 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 20250830T055841.7Z 9373.249093 309 1 48.93 2 14.86 233.79 74.03 123.01 0.00 1 0.00 1 0 17 8.175e-03 6.818e-03 1.676e-03 1.291e-03 1.281524e-01 7.013225e-04 1.395553e-03 -6.000000e+00 4.954176e-03 227.25 -2.00 3.11 -2.00 314.23 0.00e+00 3.102932e-04 5.497864e-05 2.464253e-05 -6.000000e+00 2.297389e-04 294.31 -2.00 20.00 -2.00 313.58 0.00e+00 1.035 0.000 302.00 328.00 3 5.4991e+00 1.7778e-03 1.1622e-02 -6.0000e+00 1.2231e-02 2.9327e-02 1.9600e-03 5.8368e-03 -6.0000e+00 1.3193e-02 -1.6870e-03 1.1297e-03 2.8470e-03 -6.0000e+00 7.9222e-03 -3.0520e-03 4.9380e-04 8.0447e-04 -6.0000e+00 3.4084e-03 7.3003e-04 -2.1317e-04 4.0633e-05 1.2894e-05 -6.0000e+00 2.5409e-04 3.5968e-03 0.0000e+00 11 8 0 10 0 0 99.96 23.66 0.42 0.00360 0.00200 18 4 1 5 0 2717.890 26.00 20.00 23.66 36.00 15.8 995.09 741 -284 -1496 -3004 -576 -1111 10 906 674 -562 -1273 147 -258 493 681 30 1058 172 843 618 1035 80 1178 706 485 913 -530 -1087 106 881 1547 631 1255 -1269 -2498 -1133 -1600 -691 516 -456 -1164 -784 -837 -916 -510 -176 -674 -847 -413 54 1061 635 888 830 434 829 1028 575 833 919 1315 1260 1483 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548 14 -174 -22 -100 -303 -636 -1000 SS 20250830T071712.0Z 9373.303611 359 1 49.42 2 32.12 257.72 59.87 134.11 0.00 1 0.00 1 0 17 7.667e-03 6.279e-03 8.584e-04 6.108e-04 1.420378e-01 3.294147e-04 1.551642e-03 -6.000000e+00 4.646470e-03 227.25 -2.00 3.11 -2.00 314.72 0.00e+00 3.297151e-04 2.830552e-05 4.755247e-05 -6.000000e+00 2.154704e-04 294.31 -2.00 20.00 -2.00 314.01 0.00e+00 1.180 0.000 302.00 328.00 3 3.7979e+00 8.3909e-04 1.3166e-02 -6.0000e+00 1.1472e-02 1.8336e-02 9.2735e-04 6.4897e-03 -6.0000e+00 1.2373e-02 -1.4339e-03 5.3250e-04 3.1640e-03 -6.0000e+00 7.4301e-03 -2.6351e-03 2.3492e-04 8.8676e-04 -6.0000e+00 3.1967e-03 3.3843e-03 -1.6243e-04 1.9192e-05 1.3991e-05 -6.0000e+00 2.3831e-04 3.6296e-03 0.0000e+00 10 0 0 10 0 0 99.90 23.66 0.23 0.00363 0.00241 186 40 1 5 0 265.660 26.00 20.00 23.66 37.12 15.7 1002.35 367 -137 -1288 -2184 -1784 -652 -167 998 792 -844 -1190 -470 88 55 595 -298 33 426 943 927 797 518 1002 765 380 802 -454 -769 234 794 1258 893 1161 -1544 -2490 -1408 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