File name: Pandora26s1_CambridgeMA_20250227_L2Fit_fout2c10d20240425p1-8.txt File generation date: 20250228T050143.0Z Data description: Level 2 spectral fitting results file Data file version: fout2c10p1-8 Local principal investigator: Kelly Chance Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 26 Spectrometer number: 1 Processing software version used: BlickP v1.8.74 Instrument operation file used: Pandora26_OF_v3d20230725.txt Instrument calibration file used: Pandora26s1_CF_v10d20240425.txt Level 1 file used: Pandora26s1_CambridgeMA_20250227_L1_smca1c10d20240425p1-8.txt Full location name: Harvard - William James Hall, Cambridge (MA) Short location name: CambridgeMA Country of location: USA Location latitude [deg]: 42.3800 Location longitude [deg]: -71.1100 Location altitude [m]: 60 Local noon date: 20250227 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: 196 338 Nominal wavelengths inside fitting window [nm]: 305.0963 305.2371 305.3779 305.5186 305.6594 305.8002 305.9409 306.0816 306.2224 306.3631 306.5038 306.6445 306.7851 306.9258 307.0664 307.2071 307.3477 307.4883 307.6289 307.7695 307.9101 308.0507 308.1912 308.3318 308.4723 308.6129 308.7534 308.8939 309.0344 309.1748 309.3153 309.4558 309.5962 309.7366 309.8771 310.0175 310.1579 310.2982 310.4386 310.5790 310.7193 310.8597 311.0000 311.1403 311.2806 311.4209 311.5612 311.7015 311.8417 311.9820 312.1222 312.2624 312.4026 312.5428 312.6830 312.8232 312.9634 313.1035 313.2437 313.3838 313.5239 313.6640 313.8041 313.9442 314.0843 314.2243 314.3644 314.5044 314.6444 314.7844 314.9244 315.0644 315.2044 315.3444 315.4843 315.6243 315.7642 315.9041 316.0440 316.1839 316.3238 316.4637 316.6035 316.7434 316.8832 317.0230 317.1628 317.3026 317.4424 317.5822 317.7220 317.8617 318.0015 318.1412 318.2809 318.4206 318.5603 318.7000 318.8397 318.9793 319.1190 319.2586 319.3982 319.5378 319.6774 319.8170 319.9566 320.0962 320.2357 320.3753 320.5148 320.6543 320.7938 320.9333 321.0728 321.2123 321.3517 321.4912 321.6306 321.7700 321.9094 322.0488 322.1882 322.3276 322.4669 322.6063 322.7456 322.8849 323.0243 323.1636 323.3028 323.4421 323.5814 323.7206 323.8599 323.9991 324.1383 324.2775 324.4167 324.5559 324.6951 324.8342 324.9734 --------------------------------------------------------------------------------------- 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 20250227T161228.2Z 9189.675327 194 1 9.26 2 51.47 165.83 55.36 171.16 0.00 1 0.00 1 0 17 8.159e-03 5.610e-03 1.269e-03 7.640e-04 2.405205e-01 3.994555e-04 2.935749e-03 -6.000000e+00 4.827776e-03 225.30 -2.00 3.54 -2.00 315.59 0.00e+00 2.692014e-04 3.841032e-05 3.108136e-05 -6.000000e+00 2.110183e-04 274.59 -2.00 20.00 -2.00 315.05 0.00e+00 1.602 0.000 302.00 328.00 3 2.5446e+00 1.0240e-03 2.0052e-02 -6.0000e+00 1.1942e-02 -4.9128e-03 1.1447e-03 1.2194e-02 -6.0000e+00 1.3012e-02 -1.8423e-03 6.5519e-04 6.0430e-03 -6.0000e+00 7.7312e-03 -2.0025e-03 2.8838e-04 1.7113e-03 -6.0000e+00 3.2042e-03 6.4465e-03 1.8031e-04 2.4036e-05 2.4729e-05 -6.0000e+00 2.5472e-04 9.0811e-03 -1.0765e-04 12 1 1 12 1 1 99.91 24.12 0.34 0.00908 0.01044 72 45 1 5 0 126.790 33.50 20.01 24.12 15.68 5.1 992.85 -828 -2160 -2664 -2639 -2314 -2154 -915 -226 -76 -859 -1534 -323 -147 -410 365 -207 162 968 1071 1813 912 1028 1520 596 694 651 -659 -139 981 907 1399 1071 449 -1248 -2201 -550 -538 -384 -150 -882 -1109 -683 -562 -519 -370 -78 -463 -217 -153 388 843 859 761 744 436 659 538 386 725 864 1010 1252 1004 662 -229 -373 193 -23 897 441 -227 69 -195 21 -155 -135 -71 -436 -200 -631 -1245 -1302 -1829 -1402 -833 -616 -366 -120 95 47 181 436 241 715 699 346 304 220 -232 -594 -498 -479 30 195 -584 -831 -430 -372 21 340 224 120 185 138 94 522 529 313 320 -74 -243 -90 305 169 502 698 476 1250 624 154 154 -127 -59 57 23 -111 -77 20 -262 -313 -240 -487 -492 -211 -588 -720 -664 -579 -532 -239 -60 -22 -256 -466 -102 -48 -144 142 -81 67 408 466 803 412 467 668 278 337 321 -321 -63 450 417 638 524 220 -620 -1126 -283 -291 -230 -96 -614 -799 -510 -411 -382 -282 -59 -342 -156 -109 280 637 661 618 605 366 562 446 330 610 733 860 1100 913 625 -212 -334 169 -21 811 427 -230 69 -195 21 -145 -123 -62 -375 -175 -596 -1228 -1355 -1969 -1543 -945 -720 -448 -146 117 55 207 471 251 736 741 393 360 274 -293 -752 -607 -562 35 232 -726 -1061 -558 -492 28 472 322 172 260 185 123 651 665 403 428 -101 -339 -123 417 227 657 893 591 1572 813 209 212 -179 -83 81 35 -166 -120 31 -411 -479 -364 -717 -738 SS 20250227T162555.9Z 9189.684675 200 1 54.27 2 50.95 170.06 55.01 175.06 0.00 1 0.00 1 0 17 9.631e-03 5.475e-03 1.425e-03 6.830e-04 2.398613e-01 3.543139e-04 2.918055e-03 -6.000000e+00 5.700107e-03 225.30 -2.00 3.54 -2.00 316.27 0.00e+00 2.759350e-04 3.991512e-05 4.171355e-05 -6.000000e+00 2.490989e-04 274.59 -2.00 20.00 -2.00 315.70 0.00e+00 1.584 0.000 302.00 328.00 3 3.9361e+00 9.1697e-04 1.9918e-02 -6.0000e+00 1.4099e-02 9.6058e-03 1.0274e-03 1.2208e-02 -6.0000e+00 1.5362e-02 -1.9718e-03 5.9306e-04 6.0532e-03 -6.0000e+00 9.1277e-03 -3.2067e-03 2.7118e-04 1.7176e-03 -6.0000e+00 3.7836e-03 1.6223e-03 2.5993e-04 2.1616e-05 2.3581e-05 -6.0000e+00 3.0068e-04 8.1436e-03 -9.3359e-05 10 0 0 10 0 0 100.00 24.32 0.36 0.00814 0.01010 561 59 1 5 0 96.730 33.75 20.02 24.32 17.64 5.1 1004.16 -471 -2942 -2803 -3087 -3952 -3402 -1639 -177 -76 -308 -662 402 -815 -432 460 -69 51 1302 1715 2752 598 327 1762 1068 559 234 -932 -647 1392 920 1376 823 -529 -1298 -2516 -408 -1214 -564 -4 -1047 -1715 -760 -163 -595 -405 -3 -560 -193 -328 74 482 946 1254 831 529 754 445 596 579 920 1115 1313 867 509 252 -514 137 38 826 825 -188 -129 61 30 -127 -118 121 -189 -281 -556 -1016 -1433 -1720 -1294 -752 -565 -186 69 154 -9 74 448 268 443 602 329 284 214 -147 -573 -532 -452 -80 263 -510 -892 -475 -460 146 330 197 154 14 125 227 361 521 276 121 -114 -272 -158 161 259 455 611 424 1080 630 248 116 -203 -30 77 140 41 -133 -58 -185 -227 -138 -606 -377 -84 -571 -536 -551 -725 -613 -310 -33 -15 -64 -140 89 -204 -122 143 -23 18 467 580 945 212 117 639 409 224 96 -376 -246 540 359 517 333 -227 -561 -1064 -172 -573 -286 -2 -657 -1167 -533 -116 -427 -290 -2 -388 -130 -218 50 342 708 920 639 419 607 361 479 461 736 929 1170 778 474 229 -438 117 32 708 783 -182 -129 60 29 -118 -105 99 -152 -240 -496 -1012 -1470 -1880 -1407 -869 -693 -225 85 187 -11 84 490 274 449 647 368 352 273 -194 -738 -643 -537 -93 316 -626 -1158 -644 -620 206 468 289 226 21 170 301 457 664 369 165 -163 -396 -226 224 362 602 770 546 1411 829 348 161 -290 -44 111 215 65 -209 -93 -295 -353 -217 -928 -572 SS 20250227T163438.6Z 9189.690725 203 1 54.30 2 50.71 172.82 54.87 177.59 0.00 1 0.00 1 0 17 7.453e-03 5.478e-03 3.067e-04 1.862e-04 2.376096e-01 9.734741e-05 2.904970e-03 -6.000000e+00 4.411242e-03 225.30 -2.00 3.54 -2.00 315.56 0.00e+00 2.761359e-04 9.288995e-06 2.998797e-05 -6.000000e+00 1.927694e-04 274.59 -2.00 20.00 -2.00 315.02 0.00e+00 1.576 0.000 302.00 328.00 3 1.5354e+00 2.4948e-04 1.9763e-02 -6.0000e+00 1.0911e-02 -9.2286e-03 2.7885e-04 1.2055e-02 -6.0000e+00 1.1888e-02 -1.7607e-03 1.5951e-04 5.9741e-03 -6.0000e+00 7.0637e-03 -2.4719e-03 7.0131e-05 1.6910e-03 -6.0000e+00 2.9282e-03 1.8264e-02 1.4612e-04 5.8601e-06 2.4517e-05 -6.0000e+00 2.3268e-04 7.7303e-03 -1.0040e-04 10 0 0 10 0 0 99.81 24.48 0.30 0.00773 0.00883 1574 165 1 5 0 34.490 33.75 20.02 24.48 18.95 5.0 1009.81 -879 -2107 -2185 -2763 -1642 -746 -214 358 -201 -1030 -1239 -182 -129 -187 201 -282 19 808 627 1222 809 872 1272 772 555 259 -492 -245 709 1079 1492 881 535 -1314 -1834 -693 -896 -357 -227 -815 -1136 -676 -458 -643 -248 -231 -517 -145 -101 515 899 803 824 852 530 763 580 386 641 923 1105 1312 990 688 -171 -413 187 7 938 480 -381 -107 -228 -2 -148 -161 -66 -293 -162 -632 -1123 -1369 -1845 -1314 -755 -643 -300 -121 49 -2 158 400 375 758 591 272 268 213 -283 -540 -487 -529 -40 154 -527 -867 -411 -350 95 325 267 119 101 167 218 498 591 320 199 -112 -307 -25 232 219 518 634 489 1073 659 241 129 -153 18 84 84 -98 -133 -5 -235 -290 -200 -523 -510 -228 -585 -600 -711 -416 -185 -57 96 -59 -313 -382 -55 -43 -67 79 -113 8 346 277 552 371 402 567 363 273 130 -242 -114 330 500 685 435 264 -658 -943 -359 -489 -205 -146 -570 -824 -508 -337 -476 -182 -175 -384 -105 -72 372 681 620 645 695 446 652 482 318 543 786 943 1155 902 650 -159 -371 164 6 847 466 -387 -108 -228 -2 -140 -147 -58 -252 -142 -597 -1105 -1424 -1986 -1443 -856 -753 -366 -146 60 -2 181 433 390 780 627 308 317 265 -356 -682 -594 -621 -47 183 -654 -1107 -532 -462 129 451 385 171 142 223 285 620 742 411 266 -154 -430 -34 318 295 678 813 608 1350 857 325 176 -216 26 120 123 -147 -205 -7 -368 -444 -302 -770 -765