# # 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 = 50.805817 km # Date (UTC) = 2015-12-25T09:49:09.741 # Date (julian) = 2457381.90914053 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6495.3307 4.0736861e+10 0.020726360 0.030875192 109.32012 29.015471 6497.3911 3.7909246e+10 0.027590821 0.031496503 109.37044 28.918440 6499.4515 3.5237310e+10 0.034754844 0.032117815 109.41783 28.821419 6501.5119 3.3039582e+10 0.042443102 0.032739126 109.46455 28.724401 6503.5723 3.1022195e+10 0.050612399 0.033360438 109.51136 28.627286 6505.6327 2.9181797e+10 0.059351773 0.033981750 109.56166 28.526675 6507.6932 2.7506352e+10 0.068740483 0.034603061 109.61197 28.426064 6509.7536 2.5934741e+10 0.078790922 0.035224373 109.66140 28.326329 6511.8140 2.4481637e+10 0.089531159 0.035845684 109.70811 28.229311 6513.8744 2.3019911e+10 0.10082587 0.036466996 109.75482 28.132293 6515.9348 2.1667868e+10 0.11276747 0.037088308 109.80319 28.035268 6517.9952 2.0420305e+10 0.12532364 0.037709619 109.85350 27.938237 6520.0556 1.9186861e+10 0.13835091 0.038330931 109.90382 27.841206 6522.1160 1.8004104e+10 0.15146970 0.038947637 109.95169 27.744184 6524.1765 1.6855386e+10 0.15933406 0.039489645 109.99840 27.647166 6526.2369 1.5769287e+10 0.16607962 0.039916409 110.04512 27.550149 6528.2973 1.4800693e+10 0.17288572 0.041678311 110.09183 27.453130 6530.3577 1.3869097e+10 0.17809164 0.044329449 110.13854 27.356112 6532.4181 1.2990633e+10 0.18169157 0.047033467 110.18525 27.259094 6534.4785 1.2174655e+10 0.18245467 0.048078415 110.23196 27.162075 6536.5389 1.1385586e+10 0.18129628 0.048272686 110.27867 27.065057 6538.5993 1.0661890e+10 0.18030379 0.049448523 110.32539 26.968035 6540.6597 9.9605013e+09 0.17878723 0.051165781 110.37211 26.871003 6542.7202 9.3176831e+09 0.17653283 0.051275648 110.41883 26.773972 6544.7806 8.7236624e+09 0.17465643 0.052277557 110.46555 26.676948 6546.8410 8.1552461e+09 0.17244382 0.053156514 110.51226 26.579930 6548.9014 7.6309107e+09 0.17002120 0.053936831 110.55897 26.482911 6550.9618 7.1243772e+09 0.16817424 0.055226186 110.60568 26.385894 6553.0222 6.6669754e+09 0.16673859 0.055323902 110.65239 26.288876 6555.0826 6.2489955e+09 0.16471509 0.054783942 110.69910 26.191858 6557.1430 5.8624575e+09 0.16226164 0.053776453 110.74582 26.094840 6559.2034 5.5067230e+09 0.15927016 0.052364218 110.79253 25.997822 6561.2639 5.1776486e+09 0.15623279 0.051242658 110.83853 25.900801 6563.3243 4.8748742e+09 0.15342260 0.049553264 110.88166 25.803769 6565.3847 4.5959586e+09 0.15070771 0.047881589 110.92478 25.706738 6567.4451 4.3309382e+09 0.14824268 0.046240852 110.96940 25.609712 6569.5055 4.0690474e+09 0.14577599 0.044885325 111.01611 25.512694 6571.5659 3.8272071e+09 0.14342156 0.044348713 111.06282 25.415676 6573.6263 3.6067379e+09 0.14044099 0.043154871 111.10726 25.318658 6575.6867 3.4126246e+09 0.13728904 0.041685696 111.15038 25.221640 6577.7471 3.2364597e+09 0.13409800 0.039046784 111.19350 25.124622 6579.8076 3.0609349e+09 0.13105908 0.036626546 111.23662 25.030656 6581.8680 2.8997907e+09 0.12862334 0.035333775 111.27974 24.937231 6583.9284 2.7438411e+09 0.12661029 0.034551761 111.32310 24.843567 6585.9888 2.5979046e+09 0.12475569 0.033180255 111.36981 24.746536 6588.0492 2.4629157e+09 0.12348332 0.033363499 111.41653 24.649505 6590.1096 2.3409781e+09 0.12148293 0.030858165 111.46223 24.552477 6592.1700 2.2367207e+09 0.11906469 0.027908378 111.50535 24.455459 6594.2304 2.1346373e+09 0.11670651 0.026046024 111.54847 24.358441 6596.2909 2.0293699e+09 0.11406826 0.025725951 111.59429 24.255350 6598.3513 1.9144784e+09 0.11230000 0.025239460 111.64280 24.146203 6600.4117 1.8022849e+09 0.11188105 0.025836199 111.69117 24.037480 6602.4721 1.6924253e+09 0.11120073 0.027113775 111.73428 23.944055 6604.5325 1.5983405e+09 0.11004899 0.026387455 111.77740 23.850630 6606.5929 1.5206013e+09 0.10914193 0.026438527 111.82052 23.756326 6608.6533 1.4538222e+09 0.10628273 0.023715098 111.86365 23.659295 6610.7137 1.3932393e+09 0.10320327 0.024684932 111.90677 23.562263 6612.7741 1.3307632e+09 0.10169063 0.023742343 111.94989 23.465238 6614.8346 1.2748171e+09 0.10031279 0.023365518 111.99302 23.368220 6616.8950 1.2243154e+09 0.098631957 0.023422764 112.03614 23.271201 6618.9554 1.1744864e+09 0.097629063 0.024492218 112.07682 23.176621 6621.0158 1.1267578e+09 0.096519412 0.025084214 112.11634 23.083195 6623.0762 1.0809405e+09 0.094799161 0.024520057 112.15587 22.989770 6625.1366 1.0388161e+09 0.093300485 0.025560622 112.19861 22.893128 6627.1970 1.0053026e+09 0.091291697 0.025392917 112.24173 22.796110 6629.2574 9.6245570e+08 0.090465579 0.026062560 112.28545 22.698183 6631.3178 9.2328594e+08 0.089075164 0.025963052 112.33396 22.593079 6633.3783 8.8057676e+08 0.088075581 0.026218293 112.38247 22.487975 6635.4387 8.3731415e+08 0.086951113 0.026465572 112.42525 22.388027 6637.4991 8.0683785e+08 0.085882433 0.025916978 112.46478 22.290996 6639.5595 7.7186385e+08 0.085516268 0.025428100 112.50431 22.193965 6641.6199 7.4114627e+08 0.085992756 0.025150405 112.54691 22.100020 6643.6803 7.0634586e+08 0.085338836 0.025295337 112.59003 22.006595 6645.7407 6.7569937e+08 0.084491589 0.025798686 112.63289 21.912907 6647.8011 6.5289824e+08 0.083528353 0.026859582 112.67241 21.815889 6649.8615 6.3372254e+08 0.082684305 0.026446087 112.71194 21.718871 6651.9220 6.1269386e+08 0.082101573 0.027190714 112.75290 21.619506 6653.9824 5.8535427e+08 0.081464834 0.028027225 112.79737 21.514402 6656.0428 5.5477617e+08 0.079803711 0.028060967 112.84183 21.409297 6658.1032 5.1978141e+08 0.078548523 0.030244095 112.88227 21.313718 6660.1636 4.9496097e+08 0.077180354 0.031774706 112.92180 21.220280 6662.2240 4.7406667e+08 0.075737151 0.032918585 112.96146 21.126722 6664.2844 4.5616900e+08 0.074532811 0.031165380 113.00458 21.029704 6666.3448 4.4208875e+08 0.074366161 0.026975791 113.04770 20.932686 6668.4053 4.2450038e+08 0.073390550 0.027829392 113.09115 20.833640 6670.4657 4.0799733e+08 0.073125677 0.027112899 113.13562 20.728535 6672.5261 3.9178383e+08 0.072922393 0.027184521 113.18009 20.623430 6674.5865 3.7258202e+08 0.071976218 0.029449529 113.22072 20.527402 6676.6469 3.5541123e+08 0.070028198 0.032130645 113.26024 20.433977 6678.7073 3.4258101e+08 0.069436518 0.030463536 113.29979 20.340506 6680.7677 3.2735311e+08 0.070410369 0.029607199 113.34421 20.235517 6682.8281 3.1408875e+08 0.071172866 0.031057266 113.38868 20.130412 6684.8885 2.9862672e+08 0.071242268 0.032699182 113.43057 20.029508 6686.9490 2.8366033e+08 0.069866224 0.034313200 113.47010 19.932476 6689.0094 2.7044406e+08 0.067270568 0.034007595 113.50963 19.835445 6691.0698 2.6244468e+08 0.066504061 0.032984800 113.54651 19.741074 6693.1302 2.5480614e+08 0.065765512 0.031559426 113.58244 19.647649 6695.1906 2.4719422e+08 0.065306856 0.029824463 113.61838 19.554224 6697.2510 2.3895932e+08 0.064775556 0.030123031 113.66246 19.449649 6699.3114 2.2909144e+08 0.063522757 0.031303079 113.70693 19.344545 6701.3718 2.2058342e+08 0.061850606 0.031955031 113.75139 19.239441 6703.4322 2.0933510e+08 0.061907891 0.034756848 113.79586 19.134336 6705.4927 1.9833749e+08 0.062071161 0.037544449 113.84027 19.029347 6707.5531 1.8736697e+08 0.061811447 0.040107600 113.87981 18.935891 6709.6135 1.8025219e+08 0.060956397 0.040742341 113.91934 18.842466 6711.6739 1.7803585e+08 0.058973423 0.041458935 113.95907 18.746420 6713.7343 1.7193194e+08 0.056954999 0.046342435 113.99949 18.641316 6715.7947 1.6540747e+08 0.055310057 0.048191398 114.03992 18.536211 6717.8551 1.6023933e+08 0.053384541 0.049821375 114.07968 18.439864 6719.9155 1.5103800e+08 0.052288219 0.050500013 114.11921 18.346427 6721.9759 1.4868971e+08 0.052451145 0.050597957 114.15874 18.252990 6724.0364 1.4187539e+08 0.050523850 0.049623041 114.19913 18.148258 6726.0968 1.3230275e+08 0.046969353 0.040952240 114.23956 18.043153 6728.1572 1.3076677e+08 0.046368126 0.039850878 114.28198 17.938049 6730.2176 1.2687121e+08 0.045060912 0.040677249 114.32645 17.832944 6732.2780 1.2243732e+08 0.043635504 0.043791389 114.37074 17.728079 6734.3384 1.2039478e+08 0.043025352 0.049333238 114.40667 17.634654 6736.3988 1.1149217e+08 0.044794284 0.051862796 114.44261 17.541229 6738.4592 1.0554336e+08 0.045852716 0.059849412 114.47961 17.445029 6740.5197 1.0268379e+08 0.045242931 0.064938095 114.52003 17.339924 6742.5801 95705539. 0.042481801 0.070024181 114.56045 17.234819 6744.6405 92140411. 0.038727316 0.078288802 114.60397 17.132802 6746.7009 86337608. 0.035225905 0.070838713 114.64843 17.031740 6748.7613 82380580. 0.034173149 0.071022103 114.69173 16.929501 6750.8217 83688524. 0.031343401 0.073407229 114.73216 16.824381 6752.8821 81502175. 0.028629475 0.073113700 114.77259 16.719262 6754.9425 83375234. 0.026961682 0.074697764 114.81302 16.614154 6757.0029 79717268. 0.024303634 0.076731129 114.85344 16.509049 6759.0634 75558265. 0.025337969 0.075835242 114.89387 16.403945 6761.1238 72797491. 0.026033789 0.077978450 114.93429 16.298839 6763.1842 67230361. 0.030981357 0.076998675 114.97472 16.193734 6765.2446 69284762. 0.033158649 0.079575843 115.01515 16.092143 6767.3050 71230101. 0.032211145 0.081634246 115.05557 15.991081 6769.3654 67684449. 0.027421538 0.085340541 115.09599 15.888420 6771.4258 61457689. 0.023265268 0.090337945 115.13642 15.783315 6773.4862 56306298. 0.018018833 0.095335348 115.17684 15.678211 6775.5466 51058853. 0.0054457206 0.10033275 115.21727 15.573106 6777.6071 48964305. 0.0085412425 0.10533016 115.25769 15.468001 6779.6675 45303507. 0.021183029 0.11032756 115.29812 15.364708