File name: Pandora135s1_ManhattanNY-CCNY_20250227_L2Fit_fout2c19d20211023p1-8.txt File generation date: 20250228T051235.1Z Data description: Level 2 spectral fitting results file Data file version: fout2c19p1-8 Local principal investigator: Maria Tzortziou Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 135 Spectrometer number: 1 Processing software version used: BlickP v1.8.74 Instrument operation file used: Pandora135_OF_v3d20200205.txt Instrument calibration file used: Pandora135s1_CF_v19d20211023.txt Level 1 file used: Pandora135s1_ManhattanNY-CCNY_20250227_L1_smca1c19d20211023p1-8.txt Full location name: ManhattanNY-CCNY Short location name: ManhattanNY-CCNY Country of location: USA Location latitude [deg]: 40.8153 Location longitude [deg]: -73.9505 Location altitude [m]: 34 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: 234 376 Nominal wavelengths inside fitting window [nm]: 305.0700 305.2108 305.3516 305.4924 305.6332 305.7739 305.9147 306.0554 306.1961 306.3368 306.4775 306.6182 306.7589 306.8995 307.0402 307.1808 307.3215 307.4621 307.6027 307.7433 307.8839 308.0245 308.1650 308.3056 308.4461 308.5867 308.7272 308.8677 309.0082 309.1487 309.2892 309.4296 309.5701 309.7105 309.8510 309.9914 310.1318 310.2722 310.4126 310.5530 310.6933 310.8337 310.9740 311.1144 311.2547 311.3950 311.5353 311.6756 311.8159 311.9561 312.0964 312.2366 312.3769 312.5171 312.6573 312.7975 312.9377 313.0778 313.2180 313.3582 313.4983 313.6384 313.7786 313.9187 314.0588 314.1989 314.3389 314.4790 314.6191 314.7591 314.8991 315.0392 315.1792 315.3192 315.4591 315.5991 315.7391 315.8790 316.0190 316.1589 316.2988 316.4387 316.5786 316.7185 316.8584 316.9983 317.1381 317.2780 317.4178 317.5576 317.6974 317.8372 317.9770 318.1168 318.2565 318.3963 318.5360 318.6757 318.8155 318.9552 319.0949 319.2345 319.3742 319.5139 319.6535 319.7932 319.9328 320.0724 320.2120 320.3516 320.4912 320.6307 320.7703 320.9098 321.0494 321.1889 321.3284 321.4679 321.6074 321.7469 321.8864 322.0258 322.1653 322.3047 322.4441 322.5835 322.7229 322.8623 323.0017 323.1410 323.2804 323.4197 323.5591 323.6984 323.8377 323.9770 324.1163 324.2556 324.3948 324.5341 324.6733 324.8125 324.9517 --------------------------------------------------------------------------------------- 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 20250227T170054.1Z 9189.708959 237 1 18.98 2 48.91 177.53 53.16 181.87 0.00 1 0.00 1 0 17 8.802e-03 5.373e-03 3.610e-03 1.669e-03 2.296902e-01 8.378532e-04 2.804292e-03 -6.000000e+00 4.994611e-03 225.45 -2.00 3.51 -2.00 316.35 0.00e+00 4.059852e-04 9.475845e-05 6.310811e-05 -6.000000e+00 2.169004e-04 275.98 -2.00 20.00 -2.00 315.78 0.00e+00 1.519 0.000 302.00 328.00 3 4.7819e+00 2.1701e-03 1.9117e-02 -6.0000e+00 1.2373e-02 8.5864e-03 2.4292e-03 1.1655e-02 -6.0000e+00 1.3464e-02 -1.3492e-03 1.4157e-03 5.7872e-03 -6.0000e+00 8.0039e-03 -9.9168e-05 6.6821e-04 1.6581e-03 -6.0000e+00 3.4009e-03 7.4495e-04 -6.3233e-04 4.7306e-05 1.9880e-05 -6.0000e+00 2.3869e-04 -2.1872e-02 0.0000e+00 12 1 1 12 1 1 96.00 20.23 0.24 -0.02187 -0.02662 18 13 1 5 0 998.540 25.07 19.99 20.23 15.32 26.1 958.51 -1372 -808 -1634 -2518 -2016 -4348 -2208 694 749 -1825 -1709 -1200 194 418 139 40 280 798 1045 798 782 640 -656 925 1064 226 -565 -375 -527 447 683 2046 1321 -1236 -2152 -1423 -1146 12 -56 -571 -831 -824 -549 -522 -190 -769 -229 -448 -396 261 405 1119 1002 1030 766 1024 506 382 618 668 1132 1197 1466 1007 -305 -367 -345 -42 642 658 403 274 63 72 138 28 -517 -624 -396 -620 -1039 -1135 -1769 -1333 -956 -914 -358 -120 44 212 289 -14 299 489 248 24 278 605 92 -119 -562 -406 -267 -187 -883 -617 -576 -413 32 549 432 377 278 -56 267 135 106 238 190 -115 -94 226 218 637 595 -75 399 729 433 202 27 229 -129 -168 -269 -14 353 137 -185 -192 -363 -439 -401 -239 -153 -319 -469 -347 -716 -369 126 152 -382 -355 -250 44 107 39 12 90 262 354 280 280 228 -238 346 405 90 -226 -147 -193 156 246 785 550 -524 -905 -571 -488 6 -30 -352 -546 -551 -376 -361 -130 -529 -159 -302 -260 169 273 800 735 792 590 802 405 305 484 534 894 1008 1294 923 -285 -328 -291 -34 539 603 395 275 63 71 130 24 -422 -492 -319 -540 -992 -1162 -1895 -1448 -1071 -1070 -442 -149 55 263 343 -16 310 494 262 27 327 764 121 -157 -721 -490 -310 -222 -1111 -803 -763 -556 44 793 644 571 408 -81 360 174 134 312 261 -166 -136 325 313 876 797 -99 508 911 559 273 37 326 -187 -246 -406 -21 563 224 -305 -312 -585 -681 -619 SS 20250227T171011.8Z 9189.715414 240 1 46.95 2 48.88 180.58 53.21 184.64 0.00 1 0.00 1 0 17 9.020e-03 5.439e-03 2.108e-03 9.457e-04 2.294783e-01 4.747592e-04 2.795842e-03 -6.000000e+00 5.118580e-03 225.45 -2.00 3.51 -2.00 316.45 0.00e+00 4.120108e-04 5.472109e-05 5.694769e-05 -6.000000e+00 2.222691e-04 275.98 -2.00 20.00 -2.00 315.86 0.00e+00 1.518 0.000 302.00 328.00 3 4.5825e+00 1.2314e-03 1.9100e-02 -6.0000e+00 1.2680e-02 3.6021e-03 1.3794e-03 1.1642e-02 -6.0000e+00 1.3798e-02 5.2526e-04 8.0531e-04 5.7850e-03 -6.0000e+00 8.2024e-03 -1.1751e-03 3.8125e-04 1.6626e-03 -6.0000e+00 3.4856e-03 9.1205e-04 -5.3831e-04 2.6891e-05 1.9505e-05 -6.0000e+00 2.4459e-04 -2.2352e-02 0.0000e+00 10 0 0 10 0 0 99.77 20.25 0.10 -0.02235 -0.02640 75 21 1 5 0 625.860 25.07 20.00 20.25 15.90 26.2 962.47 -90 -824 -1372 -2650 -1739 -5460 -1794 375 171 -2158 -1057 -1682 294 664 415 72 753 762 598 919 414 475 -146 657 875 563 -197 -526 -390 172 1192 1477 1414 -923 -2019 -1134 -1027 -112 236 -422 -1077 -939 -848 -815 -383 -767 -403 -547 -440 399 379 850 1100 778 696 890 626 499 582 772 1315 1539 1450 1028 -121 -199 -298 -48 656 571 425 276 52 119 33 -174 -604 -677 -427 -1006 -1083 -1398 -1853 -1247 -749 -683 -305 28 19 398 301 331 259 588 326 335 386 414 -9 -261 -446 -638 -221 -141 -728 -809 -730 -477 -126 417 253 310 185 101 24 330 99 260 199 45 -136 222 186 567 685 -89 407 713 467 292 144 247 -83 -161 -194 -61 277 223 -297 -159 -277 -471 -466 -15 -154 -263 -486 -282 -858 -282 64 33 -447 -214 -346 65 160 114 22 236 246 193 305 141 160 -50 234 328 220 -77 -196 -140 59 422 562 558 -384 -805 -448 -415 -52 126 -256 -697 -638 -571 -554 -259 -536 -275 -363 -284 254 251 600 792 589 544 685 491 392 463 606 1052 1268 1257 953 -111 -175 -247 -39 541 515 410 280 51 117 32 -155 -502 -527 -339 -865 -1017 -1409 -1950 -1366 -845 -804 -368 35 24 497 350 371 271 602 338 369 458 528 -11 -347 -560 -777 -260 -164 -898 -1036 -975 -646 -178 605 379 472 273 142 33 427 126 344 275 65 -199 321 269 785 924 -119 508 902 608 399 202 354 -122 -237 -295 -97 443 365 -494 -260 -449 -734 -725 SS 20250227T173820.2Z 9189.734956 262 1 47.08 2 49.35 189.78 53.88 192.97 0.00 1 0.00 1 0 17 2.329e-02 8.314e-03 6.332e-03 2.432e-03 2.331891e-01 1.215358e-03 2.821848e-03 -6.000000e+00 1.321793e-02 225.45 -2.00 3.51 -2.00 316.86 0.00e+00 8.406925e-04 1.552628e-04 5.321627e-05 -6.000000e+00 5.739710e-04 275.98 -2.00 20.00 -2.00 316.27 0.00e+00 1.532 0.000 302.00 328.00 3 6.2226e+00 3.1730e-03 1.9328e-02 -6.0000e+00 3.2744e-02 1.5242e-02 3.5617e-03 1.1837e-02 -6.0000e+00 3.5630e-02 3.3636e-03 2.1104e-03 5.8736e-03 -6.0000e+00 2.1181e-02 -2.2039e-03 1.0215e-03 1.7613e-03 -6.0000e+00 9.0011e-03 1.7172e-04 -5.0257e-04 6.9682e-05 1.9509e-05 -6.0000e+00 6.3161e-04 -2.2420e-02 0.0000e+00 11 8 0 10 0 0 99.80 20.31 0.03 -0.02242 -0.02620 13 4 1 5 0 3620.610 25.17 20.00 20.31 16.68 26.2 967.04 1697 742 1642 -4337 6009 -16046 1473 643 4273 -2362 2217 -186 1522 2984 -2256 2093 1992 2086 679 3101 625 1869 -15911 879 1546 -366 556 1397 -851 -1113 2102 949 3704 -2043 -2114 -1320 -782 822 345 848 -522 -1217 -1091 -577 -9 -2456 263 33 834 1045 942 249 1518 645 962 1694 165 17 314 212 1951 1783 1026 1026 163 79 -511 -441 -521 169 -208 212 174 -112 -136 -19 -289 -843 -568 -1733 -1313 -845 -1646 -923 -705 -539 82 302 294 831 315 45 187 249 -254 15 148 1308 10 -289 100 -722 -586 -662 -457 -562 -798 -457 48 562 344 546 -124 163 75 -260 -337 30 479 -368 291 637 455 753 448 -1478 394 449 470 166 -86 38 -96 -136 -369 112 353 667 -331 295 -134 -492 -755 234 114 255 -676 753 -2345 187 92 656 -407 362 -31 278 614 -539 526 524 566 193 891 188 551 -5461 275 508 -127 191 450 -261 -343 651 311 1272 -766 -751 -463 -281 337 165 455 -312 -770 -687 -377 -6 -1628 167 20 497 619 581 165 1054 459 703 1254 126 13 235 157 1454 1421 868 925 145 67 -412 -341 -422 149 -197 210 173 -108 -127 -16 -225 -636 -438 -1460 -1204 -827 -1738 -985 -799 -637 100 378 370 1038 368 49 191 248 -258 17 177 1661 13 -388 129 -861 -675 -778 -565 -740 -1071 -638 68 842 530 856 -190 237 103 -340 -434 40 663 -537 436 944 658 1071 606 -1994 506 570 613 227 -124 56 -141 -206 -577 185 582 1118 -566 493 -222 -787 -1210