File name: Pandora255s1_VirginiaBeachVA-CBBT_20240924_L2Fit_fout2c3d20240302p1-8.txt File generation date: 20241220T100629.2Z Data description: Level 2 spectral fitting results file Data file version: fout2c3p1-8 Local principal investigator: John Anderson Network principal investigator: Alexander Cede Instrument type: Pandora Instrument number: 255 Spectrometer number: 1 Processing software version used: BlickP v1.8.60 Instrument operation file used: Pandora255_OF_v2d20221206.txt Instrument calibration file used: Pandora255s1_CF_v3d20240302.txt Level 1 file used: Pandora255s1_VirginiaBeachVA-CBBT_20240924_L1_smca1c3d20240302p1-8.txt Full location name: Chesapeake Bay Bridge Tunnel Virginia Short location name: VirginiaBeachVA-CBBT Country of location: United States Location latitude [deg]: 37.0367 Location longitude [deg]: -76.0766 Location altitude [m]: 20 Local noon date: 20240924 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: 195 336 Nominal wavelengths inside fitting window [nm]: 305.1318 305.2728 305.4137 305.5546 305.6955 305.8364 305.9773 306.1182 306.2590 306.3999 306.5407 306.6815 306.8224 306.9632 307.1040 307.2447 307.3855 307.5263 307.6670 307.8078 307.9485 308.0892 308.2299 308.3706 308.5113 308.6520 308.7926 308.9333 309.0739 309.2146 309.3552 309.4958 309.6364 309.7770 309.9175 310.0581 310.1986 310.3392 310.4797 310.6202 310.7607 310.9012 311.0417 311.1822 311.3227 311.4631 311.6035 311.7440 311.8844 312.0248 312.1652 312.3056 312.4459 312.5863 312.7267 312.8670 313.0073 313.1476 313.2880 313.4282 313.5685 313.7088 313.8491 313.9893 314.1296 314.2698 314.4100 314.5502 314.6904 314.8306 314.9707 315.1109 315.2511 315.3912 315.5313 315.6714 315.8115 315.9516 316.0917 316.2318 316.3718 316.5119 316.6519 316.7920 316.9320 317.0720 317.2120 317.3519 317.4919 317.6319 317.7718 317.9117 318.0517 318.1916 318.3315 318.4714 318.6113 318.7511 318.8910 319.0308 319.1706 319.3105 319.4503 319.5901 319.7299 319.8696 320.0094 320.1492 320.2889 320.4286 320.5684 320.7081 320.8478 320.9874 321.1271 321.2668 321.4064 321.5461 321.6857 321.8253 321.9649 322.1045 322.2441 322.3837 322.5232 322.6628 322.8023 322.9418 323.0813 323.2208 323.3603 323.4998 323.6393 323.7787 323.9182 324.0576 324.1970 324.3364 324.4758 324.6152 324.7546 324.8940 --------------------------------------------------------------------------------------- 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 20240924T135949.7Z 9033.583214 336 1 17.00 2 55.60 122.54 41.58 272.77 0.00 1 0.00 1 0 17 8.598e-03 7.847e-03 2.004e-03 1.253e-03 2.216578e-01 6.544551e-04 2.643652e-03 -6.000000e+00 5.034141e-03 228.43 -2.00 3.43 -2.00 315.38 0.00e+00 2.557224e-04 6.232446e-05 3.458964e-05 -6.000000e+00 2.279702e-04 289.17 -2.00 20.00 -2.00 314.67 0.00e+00 1.765 0.000 302.00 328.00 3 4.0797e+00 1.6827e-03 2.0863e-02 -6.0000e+00 1.2497e-02 1.0087e-02 1.8688e-03 1.1195e-02 -6.0000e+00 1.3513e-02 7.2745e-03 1.0722e-03 5.4678e-03 -6.0000e+00 8.0758e-03 -1.1702e-03 4.8616e-04 1.5416e-03 -6.0000e+00 3.4760e-03 1.1979e-03 9.9764e-05 3.6437e-05 2.0501e-05 -6.0000e+00 2.4463e-04 1.2939e-03 0.0000e+00 12 9 1 12 1 1 99.80 25.38 0.30 0.00129 0.00204 22 7 1 5 0 738.860 33.25 20.00 25.38 28.24 4.9 1090.21 -1325 -2431 -1755 -2455 -133 -33 709 255 700 -429 -279 -413 65 -382 380 -542 929 488 168 1494 451 1360 991 364 555 -417 -103 356 1007 1183 1407 1513 -35 -2319 -866 -163 -191 167 -450 -849 -1408 -1283 -817 -681 -632 -427 -569 -1036 -482 353 750 621 737 318 457 544 376 590 730 1144 1598 1363 1249 209 -455 80 295 594 914 -36 17 -11 34 -22 -128 171 220 524 226 -847 -840 -1923 -1808 -1083 -870 -551 -214 -69 -84 47 538 390 996 1210 428 596 637 -11 -519 -434 -609 40 743 148 -950 -549 -369 -3778 310 225 19 103 -62 193 531 670 858 434 118 -353 -102 62 229 424 901 821 1566 1159 457 372 -69 -86 -4 200 -246 -178 146 -401 -552 -378 -387 -404 -371 -721 -504 -692 -34 -8 194 73 215 -135 -87 -137 23 -151 155 -237 413 212 76 682 209 624 473 174 277 -213 -50 171 456 542 684 745 -19 -1212 -449 -82 -103 102 -308 -626 -1062 -999 -644 -536 -496 -330 -428 -760 -363 258 580 489 609 263 386 468 325 503 614 971 1423 1263 1195 200 -431 72 259 528 862 -36 17 -11 34 -21 -121 155 192 453 204 -806 -855 -2065 -1974 -1204 -1004 -654 -264 -86 -103 56 600 423 1042 1280 461 686 761 -14 -667 -548 -736 46 852 177 -1195 -700 -477 -5126 427 319 27 147 -85 251 674 823 1079 566 161 -492 -142 85 310 560 1160 1034 1909 1430 589 493 -95 -119 -5 285 -362 -271 221 -620 -845 -574 -568 -590 SS 20240924T140324.2Z 9033.585697 339 1 8.98 2 55.00 123.35 42.28 273.25 0.00 1 0.00 1 0 17 8.838e-03 6.403e-03 2.784e-03 1.773e-03 2.241542e-01 9.275527e-04 2.691997e-03 -6.000000e+00 5.175111e-03 228.43 -2.00 3.43 -2.00 315.33 0.00e+00 1.673417e-04 8.685033e-05 2.605993e-05 -6.000000e+00 2.343434e-04 289.17 -2.00 20.00 -2.00 314.61 0.00e+00 1.739 0.000 302.00 328.00 3 4.1018e+00 2.3817e-03 2.0738e-02 -6.0000e+00 1.2847e-02 2.3502e-02 2.6440e-03 1.1342e-02 -6.0000e+00 1.3891e-02 -1.2637e-03 1.5184e-03 5.5523e-03 -6.0000e+00 8.3018e-03 -8.0956e-05 6.8691e-04 1.5539e-03 -6.0000e+00 3.5735e-03 1.1934e-03 -8.3434e-05 5.1579e-05 2.1051e-05 -6.0000e+00 2.5147e-04 9.5716e-04 0.0000e+00 12 9 1 12 1 1 99.69 25.38 0.30 0.00096 0.00033 10 6 1 5 0 815.780 33.25 20.00 25.38 28.42 4.9 1091.53 -1190 -2231 -3226 -4252 -55 424 -351 873 -613 -519 -457 130 91 467 -72 -503 551 755 609 2008 595 1228 1614 -15 1084 288 -209 -306 825 1346 1437 2097 -559 -2035 -1093 -10 -557 -207 -741 -870 -1262 -777 -885 -678 -493 -346 -556 -710 36 916 482 237 389 628 440 610 336 716 227 1083 1202 1429 1325 371 -281 -63 273 926 789 -26 -41 -224 143 46 -24 97 -73 482 -236 -886 -1268 -1968 -1642 -853 -753 -777 -272 -257 -58 -238 467 199 972 1168 219 420 585 -113 -572 -204 -338 165 557 -317 -1226 -687 -710 -422 340 99 42 50 80 127 602 765 447 673 38 -400 -273 -299 122 465 620 557 1316 1093 323 143 -36 -58 135 134 -280 -329 63 -197 -366 -238 -403 -424 -345 -685 -975 -1176 -14 110 -100 257 -197 -169 -148 45 33 177 -31 -214 239 338 281 940 283 581 788 -8 553 150 -105 -152 385 632 717 1054 -303 -1090 -551 -5 -309 -129 -498 -629 -974 -591 -685 -523 -379 -262 -427 -531 26 680 366 191 316 529 379 514 285 622 196 937 1052 1298 1243 360 -270 -57 235 803 730 -26 -42 -236 146 47 -23 87 -62 406 -210 -856 -1270 -2074 -1817 -960 -881 -937 -330 -317 -70 -280 530 212 996 1210 239 490 708 -144 -726 -254 -401 194 648 -385 -1519 -888 -932 -560 461 138 60 70 111 167 752 951 555 885 52 -549 -377 -415 163 604 787 690 1627 1365 422 191 -49 -80 190 193 -417 -496 97 -299 -566 -356 -599 -612 SS 20240924T140728.5Z 9033.588524 342 1 54.22 2 54.33 124.29 43.06 273.78 0.00 1 0.00 1 0 17 1.170e-02 9.162e-03 2.453e-03 1.406e-03 2.145935e-01 7.312731e-04 2.540276e-03 -6.000000e+00 6.852662e-03 228.43 -2.00 3.43 -2.00 315.68 0.00e+00 1.093466e-04 7.378767e-05 2.847184e-05 -6.000000e+00 3.103158e-04 289.17 -2.00 20.00 -2.00 314.94 0.00e+00 1.710 0.000 302.00 328.00 3 5.4673e+00 1.8872e-03 2.0200e-02 -6.0000e+00 1.7012e-02 1.5613e-02 2.1002e-03 1.0810e-02 -6.0000e+00 1.8394e-02 9.4595e-03 1.2073e-03 5.2779e-03 -6.0000e+00 1.0993e-02 -9.8059e-04 5.5373e-04 1.4749e-03 -6.0000e+00 4.7318e-03 3.1855e-04 3.0934e-04 4.1019e-05 1.9056e-05 -6.0000e+00 3.3300e-04 1.1588e-03 0.0000e+00 11 8 0 10 0 0 99.92 25.40 0.31 0.00116 0.00348 37 4 1 5 0 1465.350 33.25 20.00 25.40 28.71 4.9 1094.02 1378 -2889 -4412 -4775 -864 2202 -1441 1375 1637 -483 74 -1404 -1468 -467 1199 -379 2427 -60 541 2719 80 1353 2624 1067 160 -880 556 -381 1043 1596 1215 1398 -468 -2969 -1636 446 -466 -615 -237 -529 -1589 -924 -698 -575 -459 -426 -671 -924 -731 318 518 -23 427 342 460 623 -20 560 311 1063 1453 1876 1402 316 -461 61 459 898 844 -202 8 315 143 8 38 -170 -27 345 -2 -567 -1087 -1846 -1882 -1150 -678 202 24 -146 65 138 421 281 1022 628 145 1016 704 -265 -481 -231 -292 227 754 2 -945 -441 -30 -5156 779 554 339 84 -145 36 289 469 673 560 288 -8 -291 196 425 758 496 626 935 1393 715 120 -267 -294 183 -60 -122 -337 45 -244 -164 -492 -236 -353 341 -779 -1174 -1154 -184 456 -338 351 448 -137 21 -423 -455 -162 453 -142 987 -24 221 1114 34 564 1119 487 77 -433 259 -167 427 655 532 655 -234 -1479 -764 211 -234 -368 -155 -365 -1177 -702 -538 -442 -351 -321 -492 -659 -513 226 389 -18 337 281 384 530 -17 473 260 894 1282 1679 1348 314 -437 56 394 781 768 -195 8 328 147 8 35 -152 -22 280 -2 -536 -1083 -2002 -2040 -1311 -787 247 29 -180 79 165 481 308 1038 649 155 1187 868 -339 -627 -287 -351 267 880 2 -1170 -569 -40 -7276 1094 788 495 121 -204 48 376 591 868 733 388 -12 -415 271 568 1003 626 783 1135 1749 922 164 -361 -404 257 -89 -183 -525 68 -379 -251 -764 -352 -513