# # Data product developed by Dr. E. Thiemann from the # Laboratory for Atmospheric and Space Physics, Boulder, Colorado # in the frame of the PROBA2 guest investigator program. # # Please address your questions to E. Thiemann (thiemann@lasp.colorado.edu) and # to the LYRA Principal Investigator M. Dominique (marie.dominique@oma.be) # # PROBA2 data products are open to all. # Users should however refer to the following paper: http://arxiv.org/abs/1708.08833 # and acknowledge the instrument according to the rules described # at http://proba2.oma.be/data/termsOfUse in their papers and presentations # # Website reference http://proba2.oma.be/lyra/data/EarthAtmosphere/ # # Description: # Summed neutral N2 and O number density profiles, spanning altitudes between 150 and 400 km # retrieved from LYRA data acquired during occultations by the unit 3 (backup unit) zirconium # channel (bandpass: 1-2 nm + 6-20 nm). # # Radial distance is the distance from the center of Earth expressed in km to which the density corresponds. # Density O-N2 provides the summed number density of neutral O and N2 in units of radial distance and cm^-3. # The systematic error is a signed value (asymmetric) in fractional units and is primarily from the error made by # assuming that the absorption cross-sections of O and N2 are equal; a secondary source of systematic error is # from using a single-scale height atmosphere in the reference atmosphere used by the retrieval algorithm. # The random error is an unsigned value (to be applied symmetrically to the measurement) in fractional # units and gathers the uncertainties from solar spectra, solar variability and measurement noise. # Both uncertainties are described in http://arxiv.org/abs/1708.08833. # The Longitude and Latitude (in degrees) columns refer to the tangential point along the # line-of-sight, where most of the absorption occurs. # # Scale height = 40.778638 km # Date (UTC) = 2016-12-25T09:55:22.898 # Date (julian) = 2457747.91345946 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6530.6430 2.1561355e+10 0.18168859 0.044728934 -30.552060 47.942855 6532.7568 1.9293088e+10 0.18325461 0.047316409 -30.640531 47.850697 6534.8705 1.7653285e+10 0.18301345 0.048188082 -30.731468 47.760991 6536.9843 1.5830257e+10 0.18171887 0.048671175 -30.823637 47.672509 6539.0980 1.4186351e+10 0.18008374 0.049762313 -30.915807 47.584027 6541.2118 1.2923124e+10 0.17829082 0.051257843 -31.004446 47.495555 6543.3256 1.1823573e+10 0.17624652 0.051467336 -31.092917 47.407083 6545.4393 1.1086861e+10 0.17409770 0.052459503 -31.180497 47.317721 6547.5531 1.0225564e+10 0.17207854 0.053497683 -31.265281 47.225564 6549.6668 9.4727209e+09 0.16987462 0.054645816 -31.350066 47.133407 6551.7806 8.7536985e+09 0.16760143 0.055509742 -31.436806 47.043193 6553.8943 8.0900796e+09 0.16460610 0.054885504 -31.525289 46.954709 6556.0081 7.4858595e+09 0.16151214 0.054011939 -31.613772 46.866226 6558.1218 6.9622546e+09 0.15864416 0.053135494 -31.699235 46.777753 6560.2356 6.4918023e+09 0.15483886 0.052061904 -31.784020 46.689283 6562.3493 6.0486199e+09 0.15062580 0.050547501 -31.868805 46.600430 6564.4631 5.6395627e+09 0.14618157 0.048561727 -31.953590 46.508273 6566.5768 5.2555410e+09 0.14201616 0.046856568 -32.038375 46.416115 6568.6906 4.9053456e+09 0.13824248 0.045136844 -32.123159 46.325400 6570.8043 4.5604798e+09 0.13534395 0.044584322 -32.207944 46.236928 6572.9181 4.2286962e+09 0.13286803 0.043704385 -32.292728 46.148457 6575.0319 3.9161510e+09 0.13058010 0.042342751 -32.375020 46.057477 6577.1456 3.6249283e+09 0.12796661 0.039991663 -32.456129 45.965307 6579.2594 3.3497682e+09 0.12503449 0.036927917 -32.537239 45.873137 6581.3731 3.1116015e+09 0.12260251 0.035483626 -32.618337 45.784541 6583.4869 2.8928540e+09 0.12045199 0.034775238 -32.699434 45.696071 6585.6006 2.6911250e+09 0.11820156 0.033490593 -32.780532 45.606667 6587.7144 2.5042753e+09 0.11631810 0.033316646 -32.861631 45.514510 6589.8281 2.3241349e+09 0.11406360 0.031403055 -32.942730 45.422353 6591.9419 2.1713500e+09 0.11127175 0.028139112 -33.023829 45.332187 6594.0556 2.0254256e+09 0.10860778 0.026141986 -33.104927 45.243716 6596.1694 1.8961028e+09 0.10555572 0.025726504 -33.186026 45.155244 6598.2831 1.7735345e+09 0.10333302 0.025271986 -33.264082 45.063712 6600.3969 1.6612981e+09 0.10236553 0.025805806 -33.341504 44.971542 6602.5106 1.5571090e+09 0.10113855 0.027080871 -33.418925 44.879799 6604.6244 1.4600557e+09 0.099555335 0.026442022 -33.496337 44.791329 6606.7381 1.3695894e+09 0.098126903 0.026177533 -33.573748 44.702859 6608.8519 1.2800957e+09 0.094766175 0.023709847 -33.651161 44.612905 6610.9657 1.1974857e+09 0.091318953 0.024925640 -33.728574 44.520747 6613.0794 1.1093498e+09 0.089856880 0.023602726 -33.805987 44.428590 6615.1932 1.0422764e+09 0.088111788 0.023257475 -33.883399 44.338975 6617.3069 9.7926054e+08 0.086682123 0.023541006 -33.960811 44.250504 6619.4207 9.1009526e+08 0.086126795 0.024627415 -34.038223 44.162032 6621.5344 8.4188099e+08 0.085536030 0.024912310 -34.121039 44.058703 6623.6482 7.7104520e+08 0.084314294 0.024731964 -34.203982 43.955024 6625.7619 7.1017628e+08 0.083612297 0.026306812 -34.283802 43.859942 6627.8757 6.5943762e+08 0.082262071 0.025655072 -34.361224 43.771458 6629.9894 6.1472504e+08 0.081330509 0.025930212 -34.438646 43.682975 6632.1032 5.7776718e+08 0.079871393 0.026044718 -34.512914 43.591357 6634.2169 5.4083632e+08 0.078719004 0.026342667 -34.586640 43.499200 6636.3307 5.1002715e+08 0.077482116 0.026421331 -34.660366 43.407561 6638.4444 4.7726647e+08 0.076701477 0.025652279 -34.734091 43.319090 6640.5582 4.5054419e+08 0.077114872 0.025202355 -34.807816 43.230620 6642.6720 4.1957548e+08 0.077147300 0.025179194 -34.879964 43.140572 6644.7857 3.9155542e+08 0.076365763 0.025428524 -34.950005 43.048415 6646.8995 3.7761261e+08 0.075222987 0.026385737 -35.020045 42.956258 6649.0132 3.6570992e+08 0.073981080 0.027615475 -35.092728 42.866728 6651.1270 3.5950497e+08 0.073552564 0.026581466 -35.166464 42.778244 6653.2407 3.4665080e+08 0.073092354 0.027648564 -35.240183 42.689745 6655.3545 3.3443809e+08 0.071650404 0.027756685 -35.310229 42.597594 6657.4682 3.2077792e+08 0.069913467 0.029444237 -35.380267 42.505437 6659.5820 3.0524723e+08 0.068437844 0.031713197 -35.452845 42.411142 6661.6957 2.8481871e+08 0.067086637 0.032889300 -35.531641 42.311611 6663.8095 2.6667556e+08 0.065872612 0.032258885 -35.610436 42.212080 6665.9232 2.5192975e+08 0.066044756 0.027034373 -35.681539 42.119028 6668.0370 2.4151066e+08 0.065567216 0.027503509 -35.751579 42.026871 6670.1507 2.3166799e+08 0.065279973 0.027258795 -35.821010 41.935323 6672.2645 2.2208269e+08 0.065215992 0.027032907 -35.887372 41.846840 6674.3783 2.1179632e+08 0.064403513 0.029273870 -35.953734 41.758356 6676.4920 1.9779493e+08 0.062429010 0.032030817 -36.025734 41.662982 6678.6058 1.9126623e+08 0.061761683 0.030531458 -36.104529 41.559304 6680.7195 1.8172223e+08 0.062649690 0.029596789 -36.182799 41.456267 6682.8333 1.7350085e+08 0.063418445 0.031061188 -36.249153 41.367797 6684.9470 1.6590520e+08 0.063422388 0.032702149 -36.315506 41.279327 6687.0608 1.4803060e+08 0.061936373 0.034309008 -36.381859 41.189642 6689.1745 1.3967897e+08 0.059375156 0.033858926 -36.448213 41.097484 6691.2883 1.3298238e+08 0.058565970 0.032933249 -36.514567 41.005327 6693.4020 1.2695692e+08 0.057775027 0.031466168 -36.586036 40.908621 6695.5158 1.2361269e+08 0.057466142 0.029764731 -36.660684 40.809089 6697.6295 1.1305533e+08 0.056859554 0.030170934 -36.732874 40.711069 6699.7433 1.0832093e+08 0.055463914 0.030904590 -36.795548 40.618900 6701.8570 1.0033499e+08 0.053792805 0.032666969 -36.858223 40.526731 6703.9708 94911768. 0.054107752 0.036104472 -36.922711 40.436385 6706.0845 87679694. 0.054141488 0.038593553 -36.989064 40.347915 6708.1983 81265435. 0.053810426 0.040259520 -37.055417 40.259445 6710.3121 76920083. 0.052623015 0.040557575 -37.125008 40.159108 6712.4258 71241194. 0.050686642 0.042620540 -37.195511 40.055429 6714.5396 68439118. 0.048864909 0.047343973 -37.263122 39.957361 6716.6533 66834518. 0.047222477 0.049363631 -37.325788 39.868889 6718.7671 67201225. 0.045201416 0.051007062 -37.388454 39.780418 6720.8808 64244458. 0.045514306 0.050317708 -37.456262 39.681968 6722.9946 61135416. 0.044707687 0.049375653 -37.526765 39.578289 6725.1083 56830814. 0.040503433 0.041508354 -37.597266 39.475626 6727.2221 53773785. 0.038973407 0.040664513 -37.667767 39.376094 6729.3358 52077741. 0.038259037 0.040821587 -37.738268 39.276562 6731.4496 51952156. 0.036200407 0.042644783 -37.802245 39.183167 6733.5633 49700012. 0.034209661 0.046982838 -37.864920 39.090997 6735.6771 48248776. 0.032952548 0.050012215 -37.928543 38.997935 6737.7908 46179347. 0.020112094 0.056654822 -37.999045 38.898404 6739.9046 44929156. 0.031196469 0.063933608 -38.069548 38.798874 6742.0184 45544225. 0.054333363 0.068655467 -38.131871 38.704578