File name: Pandora251s1_Nainital-ARIES_20250505_L2Fit_fout2c5d20240923p1-8.txt File generation date: 20250505T185256.1Z Data description: Level 2 spectral fitting results file Data file version: fout2c5p1-8 Local principal investigator: Manish Naja Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 251 Spectrometer number: 1 Processing software version used: BlickP v1.8.75 Instrument operation file used: Pandora251_OF_v2d20221122.txt Instrument calibration file used: Pandora251s1_CF_v5d20240923.txt Level 1 file used: Pandora251s1_Nainital-ARIES_20250505_L1_smca1c5d20240923p1-8.txt Full location name: Aryabhatta Research Institute of Observational Sciences (ARIES) Short location name: Nainital-ARIES Country of location: India Location latitude [deg]: 29.3588 Location longitude [deg]: 79.4583 Location altitude [m]: 1978 Local noon date: 20250505 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: Modification of session 4, but HCHO with MLE. First and last pixel inside fitting window: 196 338 Nominal wavelengths inside fitting window [nm]: 305.0497 305.1909 305.3320 305.4732 305.6143 305.7554 305.8965 306.0376 306.1787 306.3197 306.4608 306.6018 306.7429 306.8839 307.0249 307.1659 307.3069 307.4479 307.5888 307.7298 307.8707 308.0117 308.1526 308.2935 308.4344 308.5753 308.7162 308.8570 308.9979 309.1387 309.2795 309.4204 309.5612 309.7020 309.8428 309.9835 310.1243 310.2651 310.4058 310.5465 310.6872 310.8280 310.9686 311.1093 311.2500 311.3907 311.5313 311.6720 311.8126 311.9532 312.0938 312.2344 312.3750 312.5156 312.6561 312.7967 312.9372 313.0777 313.2183 313.3588 313.4992 313.6397 313.7802 313.9207 314.0611 314.2015 314.3420 314.4824 314.6228 314.7632 314.9036 315.0439 315.1843 315.3246 315.4650 315.6053 315.7456 315.8859 316.0262 316.1664 316.3067 316.4470 316.5872 316.7274 316.8677 317.0079 317.1481 317.2883 317.4284 317.5686 317.7087 317.8489 317.9890 318.1291 318.2692 318.4093 318.5494 318.6895 318.8295 318.9696 319.1096 319.2496 319.3897 319.5297 319.6696 319.8096 319.9496 320.0895 320.2295 320.3694 320.5093 320.6493 320.7892 320.9290 321.0689 321.2088 321.3486 321.4885 321.6283 321.7681 321.9079 322.0477 322.1875 322.3273 322.4670 322.6068 322.7465 322.8862 323.0260 323.1657 323.3053 323.4450 323.5847 323.7243 323.8640 324.0036 324.1432 324.2829 324.4224 324.5620 324.7016 324.8412 324.9807 --------------------------------------------------------------------------------------- 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 20250505T044646.5Z 9256.199149 246 1 27.75 2 28.82 110.69 114.88 52.11 0.00 1 0.00 1 0 17 8.511e-03 6.771e-03 2.105e-03 1.529e-03 1.679606e-01 7.903495e-04 1.856237e-03 -6.000000e+00 4.891828e-03 229.04 -2.00 3.21 -2.00 314.61 0.00e+00 4.086795e-04 6.259409e-05 1.469571e-05 -6.000000e+00 2.125623e-04 278.96 -2.00 20.00 -2.00 314.10 0.00e+00 1.141 0.000 302.00 328.00 3 5.5475e+00 2.0259e-03 1.2069e-02 -6.0000e+00 1.2203e-02 1.6560e-02 2.2489e-03 7.8466e-03 -6.0000e+00 1.3262e-02 -1.6195e-03 1.2852e-03 3.8431e-03 -6.0000e+00 7.8774e-03 -1.8948e-03 5.5461e-04 1.0928e-03 -6.0000e+00 3.2951e-03 7.0201e-04 -9.3960e-06 4.3415e-05 1.4469e-05 -6.0000e+00 2.3399e-04 -4.0285e-03 0.0000e+00 12 9 1 12 1 1 82.62 25.55 0.20 -0.00403 -0.00410 12 4 1 5 0 2134.190 34.25 20.00 25.55 22.74 9.1 914.66 868 -397 -1575 -1935 -2311 -269 -849 -194 579 -948 -1055 -1519 -170 750 742 -32 81 573 1128 963 359 143 1599 879 646 1464 -258 -568 -373 890 2576 1732 1402 -1242 -2280 -2312 -1656 -601 -180 -701 -1199 -364 -910 -674 -386 -411 -464 -746 -728 -12 679 811 984 638 1227 638 486 461 42 506 1138 1417 1404 691 168 -503 -538 118 748 230 233 509 553 584 -144 -57 -369 -484 126 -1211 -998 -1774 -1998 -1174 -1060 -1014 -173 369 401 340 230 253 15 248 78 -140 311 842 -78 -434 -320 -827 198 213 -848 -1123 -930 -589 300 479 436 364 269 21 52 281 -76 100 411 76 -98 273 383 604 648 186 622 992 335 -20 -30 -82 -251 306 191 -304 445 67 -9 -20 -441 -792 -778 305 -153 -621 -715 -816 -87 -287 -72 216 -377 -411 -591 -70 344 352 -17 43 307 617 541 206 81 903 486 372 860 -153 -317 -204 463 1354 964 830 -718 -1328 -1307 -1006 -388 -129 -551 -970 -303 -779 -579 -328 -347 -380 -624 -586 -9 553 659 835 567 1110 587 430 427 38 459 1057 1327 1412 697 167 -482 -499 104 693 229 240 544 590 601 -147 -52 -320 -418 112 -1140 -988 -1837 -2196 -1274 -1232 -1205 -215 449 489 415 271 283 16 254 80 -156 364 1026 -96 -544 -376 -949 226 242 -1011 -1413 -1166 -767 404 648 612 510 357 26 63 337 -91 120 531 101 -133 366 500 783 794 228 720 1152 414 -25 -39 -108 -336 404 268 -429 639 99 -13 -28 -620 -1083 -1093 SS 20250505T045157.3Z 9256.202747 249 1 9.25 2 27.77 112.09 114.03 53.03 0.00 1 0.00 1 0 17 8.783e-03 6.948e-03 3.207e-03 2.389e-03 1.691415e-01 1.234127e-03 1.882439e-03 -6.000000e+00 5.048675e-03 229.04 -2.00 3.21 -2.00 314.48 0.00e+00 1.419384e-04 9.522527e-05 1.725095e-05 -6.000000e+00 2.193535e-04 278.96 -2.00 20.00 -2.00 313.98 0.00e+00 1.130 0.000 302.00 328.00 3 5.2595e+00 3.1579e-03 1.2058e-02 -6.0000e+00 1.2594e-02 2.6107e-02 3.5052e-03 7.9085e-03 -6.0000e+00 1.3687e-02 -6.7403e-03 2.0073e-03 3.8899e-03 -6.0000e+00 8.1298e-03 -2.5180e-04 8.6318e-04 1.0816e-03 -6.0000e+00 3.4011e-03 9.4187e-04 -3.0932e-05 6.7736e-05 1.4649e-05 -6.0000e+00 2.4146e-04 -4.8249e-03 0.0000e+00 12 9 1 12 1 1 99.09 25.55 -0.04 -0.00482 -0.00506 5 5 1 5 0 1541.020 34.25 20.00 25.55 23.00 9.1 915.75 679 -797 199 -2445 -2912 37 1168 -300 -752 -517 -1419 -115 -291 -188 1891 13 328 117 992 1167 9 -652 1423 848 561 711 -611 561 159 1392 2533 1663 1257 -1459 -2884 -1057 -1708 -320 -693 -692 -1144 -1082 -879 -509 -258 -436 -785 -545 -1496 162 963 396 923 1211 1214 664 711 39 488 611 861 1142 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20250505T045657.8Z 9256.206224 252 1 51.97 2 26.77 113.52 113.20 53.90 0.00 1 0.00 1 0 17 8.010e-03 6.481e-03 1.275e-03 9.437e-04 1.643217e-01 4.885958e-04 1.826141e-03 -6.000000e+00 4.604624e-03 229.04 -2.00 3.21 -2.00 314.51 0.00e+00 3.130903e-04 3.795084e-05 1.405748e-05 -6.000000e+00 2.000598e-04 278.96 -2.00 20.00 -2.00 314.00 0.00e+00 1.120 0.000 302.00 328.00 3 5.3187e+00 1.2503e-03 1.1842e-02 -6.0000e+00 1.1486e-02 1.9562e-02 1.3876e-03 7.6949e-03 -6.0000e+00 1.2483e-02 -1.2706e-03 7.9424e-04 3.7760e-03 -6.0000e+00 7.4147e-03 -2.1160e-03 3.4154e-04 1.0624e-03 -6.0000e+00 3.1020e-03 9.0389e-04 7.8709e-05 2.6772e-05 1.4425e-05 -6.0000e+00 2.2022e-04 -4.8522e-03 0.0000e+00 11 9 0 11 8 0 99.47 25.56 -0.04 -0.00485 -0.00426 40 6 1 5 0 1299.200 34.25 19.99 25.56 23.18 9.1 917.14 429 -330 -964 -2812 -1947 -614 -424 62 582 -912 -1469 -847 1 198 1342 -188 601 559 1067 839 641 171 896 861 927 1057 -36 -141 -487 864 1676 1293 1870 -871 -2327 -1579 -1610 -873 -364 -744 -1213 -629 -763 -669 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1201 448 317 -186 -48 -262 393 100 -313 425 370 -372 -175 -296 -1031 -1136