# # 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 = 42.667631 km # Date (UTC) = 2016-12-30T09:21:39.757 # Date (julian) = 2457752.89004349 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6516.4881 4.3713593e+10 0.13916099 0.037255138 116.48116 29.879192 6518.5986 4.0047550e+10 0.14981079 0.037891578 116.53269 29.779811 6520.7092 3.6187451e+10 0.16044689 0.038528019 116.58422 29.680430 6522.8198 3.2805246e+10 0.16891589 0.039131925 116.63575 29.578496 6524.9304 2.9911557e+10 0.17444157 0.039757483 116.68728 29.475436 6527.0410 2.7370855e+10 0.17805368 0.040746212 116.73881 29.372375 6529.1515 2.4680395e+10 0.18000528 0.042477189 116.79664 29.260771 6531.2621 2.2015110e+10 0.18187414 0.045610215 116.85461 29.148966 6533.3727 1.9563655e+10 0.18352231 0.047677980 116.90689 29.044144 6535.4833 1.7542315e+10 0.18293661 0.048014644 116.95474 28.944763 6537.5939 1.5903339e+10 0.18260123 0.048965214 117.00260 28.845382 6539.7045 1.4494776e+10 0.18164628 0.050496363 117.05045 28.745990 6541.8150 1.3252453e+10 0.17909710 0.051062216 117.09831 28.646596 6543.9256 1.2120298e+10 0.17632203 0.051624829 117.14663 28.547204 6546.0362 1.1134220e+10 0.17331542 0.052494323 117.19816 28.447824 6548.1468 1.0216219e+10 0.17095774 0.053711484 117.24969 28.348444 6550.2574 9.3826893e+09 0.16790727 0.055049805 117.29971 28.249064 6552.3680 8.6467657e+09 0.16411902 0.055494151 117.34756 28.149683 6554.4785 7.9818793e+09 0.15977207 0.054842422 117.39541 28.050302 6556.5891 7.3545132e+09 0.15577629 0.053926513 117.44742 27.942285 6558.6997 6.7377002e+09 0.15215979 0.052643066 117.50125 27.830480 6560.8103 6.1694373e+09 0.14884009 0.051543726 117.55341 27.722152 6562.9209 5.6698368e+09 0.14600487 0.050003657 117.60126 27.622758 6565.0315 5.2392326e+09 0.14327295 0.048282675 117.64912 27.523364 6567.1420 4.8612205e+09 0.14062541 0.046497088 117.69697 27.423978 6569.2526 4.5105172e+09 0.13815650 0.044868866 117.74482 27.324597 6571.3632 4.1860593e+09 0.13618007 0.044404076 117.79268 27.225217 6573.4738 3.8852438e+09 0.13373752 0.043277276 117.84053 27.125836 6575.5844 3.5995595e+09 0.13121527 0.041788398 117.88837 27.026456 6577.6950 3.3419794e+09 0.12849374 0.039128765 117.93574 26.927076 6579.8055 3.1175096e+09 0.12552661 0.036627657 117.97991 26.827695 6581.9161 2.9208471e+09 0.12268505 0.035319195 118.02408 26.728315 6584.0267 2.7369984e+09 0.11983724 0.034500964 118.07225 26.623800 6586.1373 2.5463000e+09 0.11726138 0.033169521 118.12608 26.511995 6588.2479 2.3545800e+09 0.11517550 0.033297154 118.17986 26.400257 6590.3585 2.1791044e+09 0.11237362 0.030395288 118.22410 26.300774 6592.4690 2.0354634e+09 0.10934409 0.027617949 118.26828 26.201381 6594.5796 1.9108573e+09 0.10623754 0.025854340 118.31349 26.103028 6596.6902 1.7957069e+09 0.10283671 0.025724136 118.36134 26.007329 6598.8008 1.6901764e+09 0.10008828 0.025024842 118.40919 25.911629 6600.9114 1.5862461e+09 0.099220147 0.026863478 118.45496 25.813850 6603.0220 1.5009564e+09 0.097711334 0.026650279 118.49913 25.714469 6605.1325 1.4175313e+09 0.096759531 0.026776228 118.54330 25.615089 6607.2431 1.3328581e+09 0.095482447 0.025226931 118.59215 25.505170 6609.3537 1.2500158e+09 0.092777084 0.023810997 118.64184 25.393364 6611.4643 1.1627729e+09 0.090460586 0.024662381 118.68914 25.286937 6613.5749 1.0816580e+09 0.089834154 0.023784510 118.73331 25.187543 6615.6854 1.0137733e+09 0.088693766 0.023272621 118.77749 25.088149 6617.7960 9.5278238e+08 0.088169050 0.023703171 118.82166 24.991403 6619.9066 9.0378310e+08 0.087697691 0.024744665 118.86583 24.895703 6622.0172 8.6014957e+08 0.086638782 0.024753415 118.91004 24.799901 6624.1278 8.0815944e+08 0.085009923 0.024930710 118.95969 24.688199 6626.2384 7.5512121e+08 0.084012010 0.026287208 119.00938 24.576395 6628.3489 7.0526872e+08 0.082693329 0.025844770 119.05584 24.474012 6630.4595 6.6158794e+08 0.081392101 0.025929434 119.10001 24.378313 6632.5701 6.3045259e+08 0.079964626 0.026100706 119.14418 24.282613 6634.6807 5.9845481e+08 0.078616617 0.026376496 119.18835 24.183717 6636.7913 5.7114298e+08 0.077144416 0.026242467 119.23252 24.084337 6638.9019 5.4393057e+08 0.076070585 0.025632351 119.27752 23.983073 6641.0124 5.1235473e+08 0.076726612 0.025148343 119.32722 23.871250 6643.1230 4.8267228e+08 0.076283516 0.025211194 119.37692 23.759428 6645.2336 4.5113272e+08 0.075299996 0.025561121 119.41983 23.659485 6647.3442 4.2146328e+08 0.074244640 0.026618998 119.46032 23.563785 6649.4548 3.9646505e+08 0.073392303 0.027006803 119.50088 23.468012 6651.5654 3.7288841e+08 0.073235587 0.026917430 119.54505 23.368632 6653.6759 3.5422746e+08 0.073024639 0.027870772 119.58922 23.269252 6655.7865 3.4002009e+08 0.071728951 0.027935209 119.63507 23.167361 6657.8971 3.1770316e+08 0.070654761 0.029941726 119.68476 23.059697 6660.0077 2.9907127e+08 0.069615300 0.031632986 119.73444 22.952033 6662.1183 2.8038237e+08 0.068490223 0.032977914 119.77596 22.851726 6664.2289 2.6500717e+08 0.067614383 0.031368718 119.81645 22.752345 6666.3394 2.5726284e+08 0.067808554 0.026974739 119.85781 22.651541 6668.4500 2.4555110e+08 0.067102893 0.027869011 119.90337 22.543861 6670.5606 2.3372652e+08 0.067088584 0.027068914 119.94892 22.436181 6672.6712 2.1726744e+08 0.067061259 0.027268631 119.99343 22.337568 6674.7818 2.0430460e+08 0.065999194 0.029614265 120.03760 22.241868 6676.8924 1.9589582e+08 0.063985515 0.032288840 120.08183 22.145524 6679.0029 1.9234053e+08 0.063388334 0.030265346 120.12738 22.033719 6681.1135 1.8506935e+08 0.064598456 0.029744448 120.17293 21.921914 6683.2241 1.7444155e+08 0.065306498 0.031517003 120.21531 21.820176 6685.3347 1.6159703e+08 0.065249214 0.033058346 120.25580 21.724477 6687.4453 1.4800895e+08 0.063553953 0.034094570 120.29629 21.628777 6689.5558 1.4047237e+08 0.061384199 0.033515670 120.34138 21.522210 6691.6664 1.3492935e+08 0.060540439 0.032844029 120.38693 21.414546 6693.7770 1.3667556e+08 0.059639821 0.031337524 120.42998 21.310963 6695.8876 1.3598656e+08 0.059562596 0.029696432 120.47047 21.211569 6697.9982 1.3273934e+08 0.058991287 0.030217587 120.51096 21.112175 6700.1088 1.2556489e+08 0.057680256 0.030748392 120.55538 21.006356 6702.2193 1.1677681e+08 0.056548859 0.033051880 120.60094 20.898692 6704.3299 1.1178292e+08 0.057136700 0.036339566 120.64649 20.791028 6706.4405 1.0431793e+08 0.057304082 0.039213082 120.69204 20.683364 6708.5511 1.0067737e+08 0.057087929 0.040643702 120.73759 20.575700 6710.6617 92159811. 0.055956148 0.040626010 120.77834 20.479366 6712.7723 86276906. 0.054270389 0.043263790 120.81883 20.383666 6714.8828 82213489. 0.052566810 0.047369781 120.85953 20.285211 6716.9934 77121296. 0.050869136 0.049864587 120.90094 20.177547 6719.1040 76552019. 0.048854331 0.051271021 120.94235 20.069883 6721.2146 74734655. 0.049510296 0.050368557 120.98713 19.962220 6723.3252 72176073. 0.048459288 0.049550300 121.03269 19.854557 6725.4358 68462056. 0.044650506 0.041303822 121.07824 19.746893 6727.5463 66710905. 0.043711095 0.040232502 121.12379 19.639229 6729.6569 60710652. 0.043183133 0.040607570 121.16934 19.531565 6731.7675 59398638. 0.041711400 0.043277506 121.21081 19.423900 6733.8781 57598744. 0.040917012 0.048691717 121.25221 19.316236 6735.9887 55157981. 0.042800859 0.050342982 121.29310 19.215391 6738.0993 54515825. 0.044378598 0.057867542 121.33359 19.119678 6740.2098 49811976. 0.044458933 0.064408836 121.37409 19.023966 6742.3204 45695770. 0.043526971 0.069391519 121.41537 18.918045 6744.4310 45844570. 0.038160812 0.078126783 121.45678 18.810381 6746.5416 48210325. 0.032775553 0.072690714 121.49819 18.702717