De Backer H. DOBSON UCCLE TOTALCOL 01-APR-1991 00:00:0030-APR-1991 23:59:590001 30 1010 Hugo De Backer Uccle; Royal Meteorological Institute Belgium Dobson Spectrophotometer Instrument No.40 NDSC 1 1 1991 04 01 2002 05 21 0 Day of year 2 1.000 1.0E+18 9.999 99.999 O3 Air Mass Factor O3 Vertical Column Density (molecules/cm**2) 9 1 1 1 1 1 1.0 1.0 1 1.0 9999 99 99 99 99 999.9 999.9 9999 99.999 Year of observation (UT) Month of observation (UT) Day of observation (UT) Hour of observation (UT) Minute of observation (UT) Latitude observation point (degrees) Longitude observation point (degrees) Elevation of station above MSL (m) Solar zenith angle at time of observation (degrees) 1 1 1.333 1991 04 01 07 59 50.80 -4.35 100 66.168 2.433 9.026 1.375 1991 04 01 09 00 50.80 -4.35 100 57.896 1.866 8.927 2.332 1991 04 02 07 57 50.80 -4.35 100 66.013 2.419 8.408 2.417 1991 04 02 09 59 50.80 -4.35 100 51.093 1.584 8.212 2.466 1991 04 02 11 11 50.80 -4.35 100 46.561 1.449 8.137 2.530 1991 04 02 12 42 50.80 -4.35 100 47.449 1.473 8.355 2.531 1991 04 02 12 45 50.80 -4.35 100 47.581 1.476 8.301 3.369 1991 04 03 08 51 50.80 -4.35 100 58.362 1.890 9.472 3.480 1991 04 03 11 31 50.80 -4.35 100 45.680 1.426 9.623 3.499 1991 04 03 11 58 50.80 -4.35 100 45.649 1.425 9.797 3.532 1991 04 03 12 45 50.80 -4.35 100 47.232 1.467 9.547 4.345 1991 04 04 08 16 50.80 -4.35 100 62.591 2.145 10.101 4.346 1991 04 04 08 18 50.80 -4.35 100 62.353 2.129 10.235 4.456 1991 04 04 10 56 50.80 -4.35 100 46.366 1.444 9.797 4.487 1991 04 04 11 40 50.80 -4.35 100 45.209 1.415 9.746 4.531 1991 04 04 12 44 50.80 -4.35 100 46.816 1.456 9.972 5.342 1991 04 05 08 12 50.80 -4.35 100 62.889 2.166 11.200 5.369 1991 04 05 08 51 50.80 -4.35 100 57.525 1.847 11.476 5.494 1991 04 05 11 51 50.80 -4.35 100 44.830 1.405 10.947 5.540 1991 04 05 12 58 50.80 -4.35 100 47.301 1.469 11.049 6.346 1991 04 06 08 18 50.80 -4.35 100 61.650 2.082 10.450 6.348 1991 04 06 08 21 50.80 -4.35 100 61.198 2.053 10.369 6.386 1991 04 06 09 16 50.80 -4.35 100 54.134 1.696 10.396 6.388 1991 04 06 09 19 50.80 -4.35 100 53.821 1.683 10.450 7.342 1991 04 07 08 11 50.80 -4.35 100 62.224 2.120 10.520 8.334 1991 04 08 08 01 50.80 -4.35 100 63.433 2.206 10.797 8.409 1991 04 08 09 48 50.80 -4.35 100 49.919 1.546 10.622 8.487 1991 04 08 11 41 50.80 -4.35 100 43.690 1.379 10.571 8.530 1991 04 08 12 42 50.80 -4.35 100 45.308 1.417 10.472 9.333 1991 04 09 07 59 50.80 -4.35 100 63.377 2.202 9.698 9.335 1991 04 09 08 02 50.80 -4.35 100 62.884 2.166 9.698 9.370 1991 04 09 08 53 50.80 -4.35 100 55.897 1.770 9.671 9.372 1991 04 09 08 56 50.80 -4.35 100 55.558 1.756 9.778 9.489 1991 04 09 11 44 50.80 -4.35 100 43.310 1.370 9.617 9.491 1991 04 09 11 46 50.80 -4.35 100 43.312 1.370 9.725 9.531 1991 04 09 12 45 50.80 -4.35 100 45.098 1.412 9.590 9.533 1991 04 09 12 47 50.80 -4.35 100 45.254 1.416 9.698 10.349 1991 04 10 08 21 50.80 -4.35 100 59.789 1.968 8.999 10.350 1991 04 10 08 24 50.80 -4.35 100 59.458 1.949 9.026 10.378 1991 04 10 09 03 50.80 -4.35 100 54.218 1.699 8.999 10.379 1991 04 10 09 06 50.80 -4.35 100 53.892 1.686 9.053 10.465 1991 04 10 11 09 50.80 -4.35 100 43.538 1.375 9.107 10.467 1991 04 10 11 11 50.80 -4.35 100 43.461 1.374 9.107 10.493 1991 04 10 11 50 50.80 -4.35 100 42.958 1.362 9.080 10.495 1991 04 10 11 52 50.80 -4.35 100 42.975 1.363 9.080 10.543 1991 04 10 13 02 50.80 -4.35 100 45.890 1.432 9.080 10.546 1991 04 10 13 05 50.80 -4.35 100 46.143 1.438 9.161 11.384 1991 04 11 09 12 50.80 -4.35 100 52.790 1.644 9.375 11.386 1991 04 11 09 15 50.80 -4.35 100 52.468 1.632 9.349 11.463 1991 04 11 11 06 50.80 -4.35 100 43.271 1.369 9.537 11.465 1991 04 11 11 08 50.80 -4.35 100 43.186 1.367 9.564 11.499 1991 04 11 11 58 50.80 -4.35 100 42.677 1.356 9.496 11.535 1991 04 11 12 49 50.80 -4.35 100 44.691 1.402 9.671 11.537 1991 04 11 12 52 50.80 -4.35 100 44.882 1.407 9.698 12.327 1991 04 12 07 51 50.80 -4.35 100 63.564 2.216 9.402 12.329 1991 04 12 07 53 50.80 -4.35 100 63.169 2.187 9.349 12.384 1991 04 12 09 13 50.80 -4.35 100 52.353 1.628 9.510 12.385 1991 04 12 09 15 50.80 -4.35 100 52.143 1.620 9.456 12.484 1991 04 12 11 36 50.80 -4.35 100 42.230 1.347 9.590 12.485 1991 04 12 11 38 50.80 -4.35 100 42.215 1.346 9.698 12.534 1991 04 12 12 49 50.80 -4.35 100 44.311 1.393 9.617 12.536 1991 04 12 12 51 50.80 -4.35 100 44.463 1.397 9.671 13.322 1991 04 13 07 43 50.80 -4.35 100 64.406 2.281 9.590 13.324 1991 04 13 07 45 50.80 -4.35 100 63.991 2.249 9.456 13.344 1991 04 13 08 15 50.80 -4.35 100 59.725 1.964 9.564 13.346 1991 04 13 08 17 50.80 -4.35 100 59.362 1.944 9.644 14.329 1991 04 14 07 53 50.80 -4.35 100 62.599 2.146 9.945 14.344 1991 04 14 08 14 50.80 -4.35 100 59.440 1.948 9.846 15.347 1991 04 15 08 20 50.80 -4.35 100 58.359 1.889 10.128 15.348 1991 04 15 08 21 50.80 -4.35 100 58.177 1.880 10.047 15.399 1991 04 15 09 34 50.80 -4.35 100 48.811 1.512 9.993 15.401 1991 04 15 09 38 50.80 -4.35 100 48.468 1.502 10.047 15.486 1991 04 15 11 39 50.80 -4.35 100 41.124 1.324 9.940 15.486 1991 04 15 11 40 50.80 -4.35 100 41.121 1.324 9.859 15.539 1991 04 15 12 56 50.80 -4.35 100 43.823 1.382 9.778 15.541 1991 04 15 12 59 50.80 -4.35 100 44.011 1.386 9.590 16.348 1991 04 16 08 21 50.80 -4.35 100 57.794 1.860 8.879 16.393 1991 04 16 09 26 50.80 -4.35 100 49.431 1.531 8.704 16.463 1991 04 16 11 07 50.80 -4.35 100 41.417 1.330 8.951 16.497 1991 04 16 11 55 50.80 -4.35 100 40.845 1.319 9.026 16.536 1991 04 16 12 51 50.80 -4.35 100 43.124 1.366 9.150 17.451 1991 04 17 10 49 50.80 -4.35 100 41.868 1.339 10.294 17.495 1991 04 17 11 52 50.80 -4.35 100 40.464 1.311 10.095 17.547 1991 04 17 13 07 50.80 -4.35 100 43.990 1.386 10.222 18.339 1991 04 18 08 07 50.80 -4.35 100 59.206 1.935 10.772 18.500 1991 04 18 12 00 50.80 -4.35 100 40.233 1.307 10.670 19.334 1991 04 19 08 01 50.80 -4.35 100 59.832 1.970 11.299 19.488 1991 04 19 11 42 50.80 -4.35 100 39.708 1.297 11.578 20.338 1991 04 20 08 07 50.80 -4.35 100 58.632 1.904 11.686 20.339 1991 04 20 08 08 50.80 -4.35 100 58.413 1.892 11.713 20.372 1991 04 20 08 55 50.80 -4.35 100 51.949 1.614 11.740 20.373 1991 04 20 08 56 50.80 -4.35 100 51.771 1.607 11.740 21.332 1991 04 21 07 57 50.80 -4.35 100 59.691 1.962 10.450 21.333 1991 04 21 07 59 50.80 -4.35 100 59.500 1.951 10.343 21.372 1991 04 21 08 56 50.80 -4.35 100 51.512 1.598 10.396 21.374 1991 04 21 08 58 50.80 -4.35 100 51.256 1.589 10.262 22.467 1991 04 22 11 12 50.80 -4.35 100 39.122 1.286 11.377 22.490 1991 04 22 11 46 50.80 -4.35 100 38.694 1.278 11.326 22.533 1991 04 22 12 47 50.80 -4.35 100 40.994 1.322 11.350 23.351 1991 04 23 08 25 50.80 -4.35 100 55.028 1.733 11.578 23.462 1991 04 23 11 04 50.80 -4.35 100 39.063 1.285 10.899 23.536 1991 04 23 12 51 50.80 -4.35 100 40.949 1.321 10.872 24.335 1991 04 24 08 02 50.80 -4.35 100 58.128 1.877 10.721 24.466 1991 04 24 11 11 50.80 -4.35 100 38.500 1.275 10.797 24.492 1991 04 24 11 48 50.80 -4.35 100 38.042 1.267 10.797 24.533 1991 04 24 12 48 50.80 -4.35 100 40.399 1.310 11.299 25.311 1991 04 25 07 27 50.80 -4.35 100 63.081 2.180 11.928 25.312 1991 04 25 07 29 50.80 -4.35 100 62.862 2.165 11.847 25.365 1991 04 25 08 45 50.80 -4.35 100 51.666 1.604 11.793 25.367 1991 04 25 08 48 50.80 -4.35 100 51.354 1.593 11.847 25.480 1991 04 25 11 31 50.80 -4.35 100 37.738 1.262 11.425 25.529 1991 04 25 12 41 50.80 -4.35 100 39.666 1.296 11.680 26.346 1991 04 26 08 18 50.80 -4.35 100 55.188 1.739 11.847 26.348 1991 04 26 08 20 50.80 -4.35 100 54.852 1.725 12.008 26.402 1991 04 26 09 38 50.80 -4.35 100 44.772 1.404 12.062 26.403 1991 04 26 09 40 50.80 -4.35 100 44.635 1.401 11.981 26.480 1991 04 26 11 31 50.80 -4.35 100 37.409 1.256 12.142 26.482 1991 04 26 11 33 50.80 -4.35 100 37.386 1.256 12.035 26.534 1991 04 26 12 49 50.80 -4.35 100 39.876 1.300 12.223 26.536 1991 04 26 12 51 50.80 -4.35 100 40.034 1.303 12.169 27.340 1991 04 27 08 08 50.80 -4.35 100 56.310 1.789 12.357 27.342 1991 04 27 08 12 50.80 -4.35 100 55.845 1.768 12.519 27.381 1991 04 27 09 08 50.80 -4.35 100 48.128 1.492 12.277 27.383 1991 04 27 09 11 50.80 -4.35 100 47.752 1.481 12.384 28.338 1991 04 28 08 06 50.80 -4.35 100 56.411 1.794 12.223 28.340 1991 04 28 08 09 50.80 -4.35 100 55.965 1.774 12.304 28.366 1991 04 28 08 46 50.80 -4.35 100 50.704 1.571 12.250 29.368 1991 04 29 08 49 50.80 -4.35 100 50.022 1.549 11.022 29.397 1991 04 29 09 32 50.80 -4.35 100 44.603 1.400 11.124 29.414 1991 04 29 09 55 50.80 -4.35 100 42.060 1.343 11.049 29.492 1991 04 29 11 48 50.80 -4.35 100 36.449 1.241 10.772 29.536 1991 04 29 12 51 50.80 -4.35 100 39.177 1.287 10.697