# # 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 = 42.365937 km # Date (UTC) = 2016-12-09T08:50:58.627 # Date (julian) = 2457731.86873410 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6527.8391 2.3020780e+10 0.17854962 0.041325663 -12.781060 51.677702 6530.0289 2.1002503e+10 0.18122105 0.043869176 -12.887991 51.589866 6532.2187 1.8891034e+10 0.18240042 0.046866922 -12.994922 51.498640 6534.4086 1.7348716e+10 0.18208492 0.048058847 -13.101852 51.406984 6536.5984 1.5917910e+10 0.18080477 0.048325887 -13.208783 51.315329 6538.7882 1.4755919e+10 0.17978369 0.049540494 -13.315714 51.223673 6540.9780 1.3534272e+10 0.17803063 0.051316146 -13.422644 51.132018 6543.1678 1.2263330e+10 0.17606253 0.051425945 -13.527099 51.042840 6545.3577 1.0986969e+10 0.17410880 0.052458771 -13.630224 50.954993 6547.5475 9.9321776e+09 0.17212663 0.053495565 -13.733473 50.867022 6549.7373 9.2732791e+09 0.16993651 0.054717659 -13.840404 50.775368 6551.9271 8.5038038e+09 0.16770574 0.055561189 -13.947335 50.683714 6554.1170 7.8459566e+09 0.16451217 0.054834835 -14.051104 50.592059 6556.3068 7.1854727e+09 0.16145548 0.053968024 -14.150396 50.500404 6558.4966 6.7421723e+09 0.15783289 0.052816141 -14.249689 50.408748 6560.6864 6.2638790e+09 0.15350532 0.051655412 -14.352020 50.320131 6562.8762 5.6290976e+09 0.14956374 0.050046126 -14.455131 50.232295 6565.0661 4.9955513e+09 0.14562926 0.048243379 -14.557569 50.143782 6567.2559 4.4979040e+09 0.14177361 0.046400828 -14.656875 50.052114 6569.4457 4.2681968e+09 0.13817419 0.044881433 -14.756181 49.960447 6571.6355 4.1034088e+09 0.13539602 0.044329699 -14.853346 49.868787 6573.8254 3.8891093e+09 0.13259045 0.042995156 -14.948820 49.777133 6576.0152 3.5971844e+09 0.13019376 0.041353927 -15.044293 49.685479 6578.2050 3.3362683e+09 0.12768628 0.038325901 -15.143358 49.593823 6580.3948 3.0851430e+09 0.12510962 0.036155884 -15.242651 49.502168 6582.5846 2.8481121e+09 0.12292265 0.035134698 -15.340715 49.410513 6584.7745 2.6566024e+09 0.12065623 0.034093632 -15.436189 49.318859 6586.9643 2.5027107e+09 0.11828220 0.033158831 -15.531663 49.227204 6589.1541 2.3699955e+09 0.11581703 0.032740244 -15.635530 49.127492 6591.3439 2.2157401e+09 0.11297683 0.028813827 -15.742940 49.024378 6593.5338 2.0372110e+09 0.11050138 0.026605995 -15.844435 48.925564 6595.7236 1.8657560e+09 0.10758067 0.025698608 -15.936102 48.833898 6597.9134 1.7320730e+09 0.10515906 0.025434495 -16.027768 48.742232 6600.1032 1.6169327e+09 0.10391087 0.025202068 -16.122319 48.653467 6602.2930 1.5149818e+09 0.10270269 0.027266566 -16.217793 48.565632 6604.4829 1.4180074e+09 0.10093508 0.026357983 -16.312205 48.477265 6606.6727 1.3242551e+09 0.099561721 0.026295175 -16.400041 48.385610 6608.8625 1.2472351e+09 0.096006000 0.023709567 -16.487878 48.293954 6611.0523 1.1684076e+09 0.092417230 0.024925088 -16.577701 48.202299 6613.2421 1.0920755e+09 0.090813515 0.023662435 -16.669356 48.110643 6615.4320 1.0196810e+09 0.088992315 0.023264822 -16.761011 48.018988 6617.6218 9.5189724e+08 0.087855871 0.023645402 -16.849232 47.927323 6619.8116 8.9664755e+08 0.087327684 0.024721743 -16.937079 47.835657 6622.0014 8.3834377e+08 0.086586832 0.024757610 -17.026007 47.743994 6624.1913 7.8146533e+08 0.085202411 0.024964689 -17.117662 47.652338 6626.3811 7.3076115e+08 0.084248621 0.026105373 -17.209316 47.560682 6628.5709 6.8932129e+08 0.083120058 0.025934887 -17.295890 47.469028 6630.7607 6.5515197e+08 0.081777248 0.025930176 -17.379907 47.377374 6632.9505 6.1569998e+08 0.080746889 0.026146323 -17.464614 47.285185 6635.1404 5.7411502e+08 0.079632115 0.026420838 -17.563432 47.182071 6637.3302 5.3458302e+08 0.078564114 0.025999695 -17.662249 47.078957 6639.5200 5.0152005e+08 0.078233234 0.025442211 -17.750431 46.984076 6641.7098 4.7250297e+08 0.078845515 0.025150711 -17.834459 46.892409 6643.8997 4.5041786e+08 0.078030976 0.025328455 -17.918486 46.800358 6646.0895 4.2837771e+08 0.077147761 0.025966463 -18.002503 46.704884 6648.2793 4.1433987e+08 0.076092102 0.027151248 -18.086519 46.609411 6650.4691 3.9658407e+08 0.075466334 0.026362632 -18.170536 46.515779 6652.6589 3.7635397e+08 0.075054101 0.027431823 -18.254553 46.424124 6654.8488 3.5734956e+08 0.073996644 0.027674644 -18.338571 46.332468 6657.0386 3.4088686e+08 0.072027090 0.028945870 -18.427950 46.230915 6659.2284 3.2648963e+08 0.070426394 0.031786952 -18.518174 46.127802 6661.4182 3.0758788e+08 0.069041397 0.032747963 -18.605068 46.030836 6663.6081 2.9066243e+08 0.067678292 0.032314707 -18.689086 45.939180 6665.7979 2.7246019e+08 0.067558920 0.027239786 -18.773104 45.847524 6667.9877 2.5927486e+08 0.066951241 0.027466255 -18.853625 45.755857 6670.1775 2.4672045e+08 0.066517110 0.027246392 -18.933833 45.664190 6672.3673 2.3371309e+08 0.066364908 0.027092516 -19.014038 45.572526 6674.5572 2.2631237e+08 0.065247559 0.029424793 -19.094236 45.480872 6676.7470 2.1703444e+08 0.063015291 0.032195150 -19.174435 45.389219 6678.9368 2.0577670e+08 0.062252021 0.030310039 -19.258536 45.289758 6681.1266 1.8998833e+08 0.063307599 0.029754505 -19.344463 45.186644 6683.3164 1.7448058e+08 0.063783905 0.031652341 -19.428364 45.087583 6685.5063 1.6739292e+08 0.063295218 0.033239585 -19.508563 44.995929 6687.6961 1.6009054e+08 0.060978781 0.033954682 -19.588761 44.904274 6689.8859 1.5569888e+08 0.058632266 0.033218559 -19.673171 44.804195 6692.0757 1.4892603e+08 0.057344110 0.032677380 -19.759099 44.701081 6694.2656 1.4000347e+08 0.056211133 0.030888832 -19.841138 44.602634 6696.4554 1.3463111e+08 0.055703664 0.029864987 -19.917527 44.510968 6698.6452 1.2619335e+08 0.054260649 0.031103432 -19.993917 44.419302 6700.8350 1.1741441e+08 0.052061282 0.031287079 -20.074445 44.315207 6703.0248 1.0763540e+08 0.051165386 0.033737409 -20.156076 44.207797 6705.2147 1.0484637e+08 0.050989550 0.037050243 -20.235281 44.107664 6707.4045 1.0229227e+08 0.050350838 0.040128883 -20.311660 44.016009 6709.5943 98963841. 0.049182527 0.040754532 -20.388038 43.924354 6711.7841 91238192. 0.046583276 0.041584363 -20.468847 43.823034 6713.9740 79287186. 0.043370106 0.047209214 -20.550479 43.719919 6716.1638 73903063. 0.041062776 0.048642590 -20.627432 43.622717 6718.3536 69372453. 0.038312748 0.050363119 -20.699992 43.531063 6720.5434 70271702. 0.037990230 0.050356801 -20.772552 43.439409 6722.7332 68340182. 0.037113970 0.049698724 -20.853263 43.337458 6724.9231 65224828. 0.032510276 0.042218470 -20.934906 43.234328 6727.1129 62234221. 0.030049538 0.040809987 -21.011370 43.137742 6729.3027 58276283. 0.028384980 0.040843664 -21.083930 43.046088 6731.4925 55202466. 0.025175573 0.042730254 -21.156490 42.954434 6733.6824 56214383. 0.023176064 0.047629004 -21.233595 42.851874 6735.8722 56011251. 0.022507991 0.050219311 -21.310930 42.748759 6738.0620 54087301. 0.019520572 0.057662415 -21.388266 42.645646 6740.2518 52544661. 0.0099959396 0.064480552 -21.465601 42.542534 6742.4416 49448797. -0.048847113 0.069686893 -21.540387 42.441687 6744.6315 48587800. -0.0086298643 0.078281833 -21.609128 42.346213 6746.8213 45910749. 0.087860337 0.069438921 -21.677869 42.250739