File name: Pandora247s1_WhittierCA_20240414_L2Fit_fout2c6d20230505p1-8.txt File generation date: 20241125T190146.2Z Data description: Level 2 spectral fitting results file Data file version: fout2c6p1-8 Local principal investigator: Peter Peterson Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 247 Spectrometer number: 1 Processing software version used: BlickP v1.8.60 Instrument operation file used: Pandora247_OF_v2d20221027.txt Instrument calibration file used: Pandora247s1_CF_v6d20230505.txt Level 1 file used: Pandora247s1_WhittierCA_20240414_L1_smca1c6d20230505p1-8.txt Full location name: Whittier College SLC Short location name: WhittierCA Country of location: United States Location latitude [deg]: 33.9768 Location longitude [deg]: -118.0299 Location altitude [m]: 130 Local noon date: 20240414 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 5 "based on session 2 trying to improve labcal" First and last pixel inside fitting window: 195 336 Nominal wavelengths inside fitting window [nm]: 305.1400 305.2810 305.4219 305.5629 305.7038 305.8447 305.9856 306.1265 306.2673 306.4082 306.5491 306.6899 306.8307 306.9715 307.1124 307.2531 307.3939 307.5347 307.6755 307.8162 307.9569 308.0977 308.2384 308.3791 308.5198 308.6605 308.8011 308.9418 309.0824 309.2231 309.3637 309.5043 309.6449 309.7855 309.9260 310.0666 310.2072 310.3477 310.4882 310.6287 310.7692 310.9097 311.0502 311.1907 311.3311 311.4716 311.6120 311.7524 311.8929 312.0333 312.1736 312.3140 312.4544 312.5947 312.7351 312.8754 313.0157 313.1560 313.2963 313.4366 313.5769 313.7171 313.8574 313.9976 314.1379 314.2781 314.4183 314.5585 314.6986 314.8388 314.9790 315.1191 315.2592 315.3993 315.5395 315.6796 315.8196 315.9597 316.0998 316.2398 316.3799 316.5199 316.6599 316.7999 316.9399 317.0799 317.2198 317.3598 317.4997 317.6397 317.7796 317.9195 318.0594 318.1993 318.3391 318.4790 318.6188 318.7587 318.8985 319.0383 319.1781 319.3179 319.4577 319.5974 319.7372 319.8769 320.0167 320.1564 320.2961 320.4358 320.5755 320.7151 320.8548 320.9944 321.1341 321.2737 321.4133 321.5529 321.6925 321.8321 321.9716 322.1112 322.2507 322.3902 322.5298 322.6693 322.8087 322.9482 323.0877 323.2271 323.3666 323.5060 323.6454 323.7848 323.9242 324.0636 324.2030 324.3424 324.4817 324.6210 324.7604 324.8997 --------------------------------------------------------------------------------------- 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 20240414T171547.2Z 8870.719296 164 1 54.63 2 43.21 114.75 96.87 50.12 0.00 1 0.00 1 0 17 8.842e-03 6.328e-03 5.419e-04 3.152e-04 2.531571e-01 1.677954e-04 2.913603e-03 -6.000000e+00 5.309700e-03 229.24 -2.00 3.36 -2.00 315.68 0.00e+00 3.278128e-04 1.673900e-05 3.536137e-05 -6.000000e+00 2.356960e-04 284.40 -2.00 20.00 -2.00 315.00 0.00e+00 1.370 0.000 302.00 328.00 3 1.9484e+00 4.3323e-04 1.8528e-02 -6.0000e+00 1.3220e-02 -1.6074e-02 4.8147e-04 1.2380e-02 -6.0000e+00 1.4290e-02 -4.4509e-03 2.7620e-04 6.0719e-03 -6.0000e+00 8.5111e-03 -1.3011e-03 1.2466e-04 1.7052e-03 -6.0000e+00 3.6129e-03 1.4208e-02 3.5114e-04 9.6321e-06 2.3047e-05 -6.0000e+00 2.6732e-04 -3.5390e-03 -1.0091e-04 10 0 0 10 0 0 99.96 25.29 0.29 -0.00354 -0.00090 552 55 1 5 0 98.957 33.25 20.00 25.29 20.12 35.2 1007.58 -1155 -1216 -1958 -3599 -1935 -1595 -235 368 -355 -1839 -1999 -452 -552 150 577 -237 438 881 897 1350 692 1174 1339 865 1083 519 -432 5 429 1018 1338 1573 989 -2185 -2071 -1388 -1397 -194 -257 -967 -984 -570 -716 -606 117 -411 -424 -336 -328 543 941 647 1013 603 575 1163 625 263 423 563 1172 1348 1211 874 -497 -283 -474 -92 1346 238 127 174 42 375 -149 -257 -588 -731 -227 -1129 -1408 -1703 -2168 -1238 -860 -457 71 132 328 316 619 28 154 656 536 377 534 510 -186 -331 -692 -802 -35 230 -1050 -762 -562 -555 328 394 375 207 171 28 52 400 370 381 404 -102 -97 130 338 303 797 24 461 998 412 284 -178 -388 -194 139 -58 -224 134 99 -224 -134 -287 -801 -279 -307 -484 -895 -440 -365 -58 93 -97 -518 -573 -137 -177 55 217 -96 172 357 376 578 300 510 603 390 508 246 -199 2 188 453 601 759 500 -1116 -1023 -709 -768 -113 -167 -677 -704 -420 -537 -455 87 -303 -306 -236 -230 389 713 502 793 492 481 984 514 222 354 478 1006 1202 1112 821 -452 -247 -410 -82 1252 231 127 175 43 360 -140 -228 -506 -634 -206 -1078 -1443 -1774 -2399 -1397 -1003 -547 86 161 401 374 691 30 159 690 593 435 659 640 -238 -416 -834 -936 -41 275 -1316 -973 -730 -755 458 564 536 299 239 37 67 506 480 510 547 -145 -138 179 462 405 1037 30 580 1263 546 388 -246 -549 -275 202 -87 -349 208 155 -348 -206 -437 -1192 SS 20240414T172942.5Z 8870.728964 174 1 53.78 2 40.62 118.12 94.72 52.15 0.00 1 0.00 1 0 17 9.190e-03 6.428e-03 2.362e-03 1.225e-03 2.450532e-01 6.497456e-04 2.815799e-03 -6.000000e+00 5.519018e-03 229.24 -2.00 3.36 -2.00 316.01 0.00e+00 3.059064e-04 6.950698e-05 3.729317e-05 -6.000000e+00 2.449692e-04 284.40 -2.00 20.00 -2.00 315.31 0.00e+00 1.316 0.000 302.00 328.00 3 4.6068e+00 1.6854e-03 1.7878e-02 -6.0000e+00 1.3741e-02 -8.6472e-03 1.8760e-03 1.2010e-02 -6.0000e+00 1.4854e-02 -3.2470e-03 1.0807e-03 5.8935e-03 -6.0000e+00 8.8465e-03 -2.2588e-03 4.9509e-04 1.6594e-03 -6.0000e+00 3.7555e-03 1.0601e-03 4.5958e-04 3.7636e-05 2.1915e-05 -6.0000e+00 2.7784e-04 -3.6362e-03 -8.9699e-05 11 8 0 10 0 0 99.99 25.28 0.39 -0.00364 -0.00018 32 3 1 5 0 1680.359 33.25 20.00 25.28 21.44 35.0 1007.77 -522 -532 -2479 -3789 -2079 796 -311 377 -756 -1346 -1983 -1056 -532 438 1415 -44 482 147 849 1291 692 1251 1059 961 2275 -391 -662 243 64 978 973 576 1187 -1742 -2911 -578 -1207 -273 -55 -1072 -1472 -524 -1943 -630 -355 -554 -185 173 -848 562 537 619 1247 698 706 1415 888 301 842 658 1148 1325 666 1110 -346 -227 -785 -139 1227 301 316 205 194 752 26 -248 -586 -559 -232 -1476 -1247 -1536 -2042 -1124 -796 -298 45 277 406 221 585 1 140 557 524 131 452 373 106 -421 -866 -940 67 204 -1022 -851 -573 -524 334 375 502 183 118 86 -251 93 521 327 308 -218 -306 232 234 335 852 -17 535 883 658 247 -112 -315 -238 279 103 -208 111 167 -287 -9 -403 -808 -110 -117 -541 -768 -385 144 -62 83 -181 -329 -494 -280 -145 134 476 -16 181 53 314 486 263 477 420 401 977 -174 -284 97 25 379 403 258 549 -811 -1326 -267 -593 -158 -35 -711 -1044 -381 -1454 -465 -261 -402 -131 119 -585 394 399 459 967 565 584 1183 749 252 695 553 957 1189 607 1025 -309 -198 -657 -119 1140 294 312 205 190 727 25 -211 -494 -473 -201 -1377 -1284 -1627 -2188 -1267 -912 -361 57 335 501 257 651 1 142 576 586 155 561 475 137 -524 -1047 -1122 79 245 -1265 -1104 -776 -711 476 540 738 265 167 118 -321 120 660 440 424 -313 -442 325 317 451 1085 -22 668 1143 872 333 -156 -451 -350 412 155 -325 176 269 -458 -14 -626 -1227 SS 20240414T183103.9Z 8870.771573 202 1 54.40 2 30.52 137.70 84.57 60.32 0.00 1 0.00 1 0 17 9.676e-03 6.380e-03 2.945e-03 1.581e-03 2.191200e-01 8.395864e-04 2.513343e-03 -6.000000e+00 5.811295e-03 229.24 -2.00 3.36 -2.00 315.90 0.00e+00 1.330038e-04 8.812489e-05 3.440747e-05 -6.000000e+00 2.579094e-04 284.41 -2.00 20.00 -2.00 315.22 0.00e+00 1.160 0.000 302.00 328.00 3 5.2191e+00 2.1750e-03 1.5860e-02 -6.0000e+00 1.4469e-02 -6.1359e-04 2.4196e-03 1.0717e-02 -6.0000e+00 1.5640e-02 -3.2859e-04 1.3920e-03 5.2573e-03 -6.0000e+00 9.3148e-03 -1.9054e-03 6.3673e-04 1.4653e-03 -6.0000e+00 3.9548e-03 6.9777e-04 4.5697e-04 4.8448e-05 1.9551e-05 -6.0000e+00 2.9252e-04 -4.0544e-03 -7.7402e-05 10 0 0 10 0 0 99.99 25.39 0.35 -0.00405 -0.00062 49 5 1 5 0 1109.996 33.25 20.00 25.39 22.33 35.2 1006.86 -958 -157 -148 -4314 -3071 526 -579 1604 -206 -2880 -2463 -491 -776 643 884 -1293 -123 402 542 1236 1075 758 1245 1515 1413 133 -519 323 886 985 1726 358 1205 -2251 -2205 -352 -1600 -88 138 -942 -1153 -370 -2665 -816 883 -504 -327 -238 -332 596 707 288 903 865 493 1101 1123 404 704 734 1004 1336 339 1103 -301 -70 -825 145 1260 226 470 168 192 314 -180 -263 -669 -642 -147 -1476 -1239 -1644 -1997 -1212 -575 -331 372 127 444 269 513 -99 182 544 287 61 229 590 -69 -319 -517 -785 -376 563 -686 -626 -535 -563 390 474 386 87 180 82 -38 -148 310 362 440 -134 -323 273 312 149 622 -83 447 973 379 103 -129 -447 47 -15 107 -48 200 303 -29 -154 -385 -1045 -213 -36 -33 -910 -652 108 -119 359 -50 -727 -623 -130 -230 212 319 -462 -45 151 209 484 423 301 508 649 630 60 -228 132 374 420 709 159 550 -1038 -981 -160 -833 -49 90 -641 -835 -275 -2051 -616 652 -372 -234 -165 -228 416 521 226 737 682 399 900 920 329 567 600 863 1230 314 1027 -288 -62 -696 124 1171 219 482 175 196 303 -170 -224 -570 -546 -126 -1431 -1240 -1780 -2156 -1376 -694 -399 464 160 547 331 576 -108 187 566 323 71 278 762 -91 -403 -642 -922 -440 695 -864 -827 -698 -769 556 674 560 124 253 113 -48 -183 393 486 598 -190 -462 380 419 201 794 -101 563 1197 499 143 -175 -621 67 -22 160 -74 316 485 -45 -238 -575 -1529