# # 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 = 45.049759 km # Date (UTC) = 2016-12-03T09:30:28.792 # Date (julian) = 2457725.89616657 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6507.7674 6.6247927e+10 0.086831735 0.034625450 114.09637 25.572438 6510.3438 5.9637998e+10 0.099189890 0.035402355 114.15287 25.446631 6512.9202 5.3260752e+10 0.11170519 0.036179259 114.20679 25.320823 6515.4966 4.7455005e+10 0.12444087 0.036956164 114.26205 25.191888 6518.0730 4.1685376e+10 0.13728865 0.037733068 114.32272 25.050332 6520.6494 3.6262807e+10 0.15028961 0.038509973 114.38190 24.912250 6523.2258 3.1733658e+10 0.16015870 0.039235068 114.43581 24.786442 6525.8022 2.7925258e+10 0.16543650 0.039690666 114.48973 24.660604 6528.3786 2.4561958e+10 0.17057875 0.041742791 114.54532 24.524208 6530.9549 2.1461014e+10 0.17349221 0.045165606 114.60090 24.387905 6533.5313 1.8650387e+10 0.17659640 0.047745391 114.65481 24.262098 6536.1077 1.6364905e+10 0.17629824 0.047886894 114.70873 24.136292 6538.6841 1.4535984e+10 0.17739110 0.049489815 114.76265 24.010484 6541.2605 1.2914952e+10 0.17671957 0.051242044 114.81656 23.884677 6543.8369 1.1396741e+10 0.17514490 0.051601545 114.87144 23.752823 6546.4133 9.9914827e+09 0.17333469 0.052804612 114.92705 23.616322 6548.9897 8.8010539e+09 0.17074834 0.053963205 114.98167 23.486102 6551.5661 7.8853054e+09 0.16757107 0.055434459 115.03559 23.360295 6554.1425 7.2031703e+09 0.16267458 0.054835370 115.08788 23.234488 6556.7189 6.6394249e+09 0.15794878 0.053907437 115.13730 23.108681 6559.2953 6.0760683e+09 0.15325371 0.052353853 115.18826 22.981421 6561.8717 5.5011262e+09 0.14953975 0.050943142 115.24892 22.844940 6564.4481 4.9474934e+09 0.14605803 0.048568536 115.30780 22.710143 6567.0245 4.4783432e+09 0.14350122 0.046596510 115.35723 22.584337 6569.6008 4.0897371e+09 0.14116229 0.044891530 115.40665 22.458530 6572.1772 3.7468383e+09 0.13904958 0.044128654 115.46184 22.322754 6574.7536 3.4478499e+09 0.13630505 0.042493036 115.51745 22.186253 6577.3300 3.1659031e+09 0.13337769 0.039701977 115.56716 22.059956 6579.9064 2.9336735e+09 0.13021175 0.036572197 115.61658 21.934148 6582.4828 2.7400174e+09 0.12719420 0.035162407 115.66601 21.811614 6585.0592 2.5585951e+09 0.12439343 0.033923437 115.71543 21.690300 6587.6356 2.3806139e+09 0.12161399 0.033299195 115.76796 21.561358 6590.2120 2.2016215e+09 0.11859542 0.030667722 115.82357 21.424878 6592.7884 2.0256545e+09 0.11524075 0.027307759 115.87593 21.293998 6595.3648 1.8769325e+09 0.11157103 0.025661400 115.92535 21.168190 6597.9412 1.7412049e+09 0.10819536 0.025425728 115.97663 21.039185 6600.5176 1.6136826e+09 0.10655799 0.026053903 116.03224 20.902684 6603.0940 1.4976039e+09 0.10462150 0.026607647 116.08587 20.771058 6605.6704 1.3888188e+09 0.10287536 0.027227419 116.13529 20.649744 6608.2468 1.3051249e+09 0.099264276 0.023725847 116.18471 20.528003 6610.8231 1.2351577e+09 0.094597551 0.024789474 116.23414 20.402195 6613.3995 1.1683633e+09 0.092565904 0.023720181 116.28356 20.276387 6615.9759 1.0927257e+09 0.090703256 0.023281558 116.33396 20.141297 6618.5523 1.0155332e+09 0.090288766 0.024187866 116.38451 20.004816 6621.1287 9.4538875e+08 0.089788203 0.025046783 116.43406 19.881855 6623.7051 8.8244597e+08 0.088256825 0.024753058 116.48348 19.760541 6626.2815 8.2576033e+08 0.087061510 0.026232241 116.53366 19.629115 6628.8579 7.6605005e+08 0.085703985 0.026051410 116.58422 19.492615 6631.4343 7.1828264e+08 0.084083052 0.025974881 116.63399 19.366560 6634.0107 6.7766345e+08 0.082589241 0.026327622 116.68342 19.245246 6636.5871 6.3746625e+08 0.081147808 0.026321766 116.73336 19.116922 6639.1635 5.9290950e+08 0.080250599 0.025569646 116.78391 18.980442 6641.7399 5.5409672e+08 0.080976256 0.025150813 116.83174 18.851299 6644.3163 5.2336895e+08 0.079926256 0.025377787 116.87667 18.729984 6646.8927 4.9496763e+08 0.078660228 0.026382213 116.92436 18.604753 6649.4690 4.7092198e+08 0.077372616 0.026987132 116.97996 18.468274 6652.0454 4.3895051e+08 0.076796400 0.027263023 117.03415 18.331794 6654.6218 4.0717282e+08 0.075714257 0.027771319 117.08470 18.195313 6657.1982 3.8383417e+08 0.073345251 0.029131047 117.13356 18.063402 6659.7746 3.6039794e+08 0.071444672 0.031673012 117.17849 17.942072 6662.3510 3.4457022e+08 0.069419618 0.032847333 117.22386 17.819586 6664.9274 3.2775268e+08 0.068129696 0.028812749 117.27441 17.683104 6667.5038 3.0527684e+08 0.067184913 0.027288512 117.32440 17.548109 6670.0802 2.8454300e+08 0.066097228 0.027291481 117.36933 17.426796 6672.6566 2.6685821e+08 0.065471528 0.027260169 117.41426 17.305483 6675.2330 2.5191144e+08 0.063494925 0.030244599 117.46409 17.170938 6677.8094 2.3533950e+08 0.061438092 0.031207609 117.51464 17.034457 6680.3858 2.1979501e+08 0.061464777 0.029524720 117.56519 16.897976 6682.9622 2.0511750e+08 0.061938944 0.031159670 117.61574 16.761496 6685.5386 1.9417798e+08 0.061215531 0.033273683 117.66115 16.643018 6688.1149 1.8901453e+08 0.058277463 0.033811724 117.70608 16.526197 6690.6913 1.8113652e+08 0.055914673 0.033036635 117.75489 16.395793 6693.2677 1.6611236e+08 0.054305348 0.031512240 117.80545 16.259292 6695.8441 1.5455420e+08 0.053294803 0.029704417 117.85600 16.122806 6698.4205 1.4464593e+08 0.051715839 0.030795030 117.90654 15.986326 6700.9969 1.4098028e+08 0.049378400 0.031407157 117.95338 15.853555 6703.5733 1.3916258e+08 0.049092638 0.035109833 117.99888 15.722129 6706.1497 1.2976538e+08 0.048690222 0.038706947 118.04395 15.598343 6708.7261 1.1810882e+08 0.047543655 0.040834270 118.08888 15.477030 6711.3025 1.1120714e+08 0.045300751 0.041036381 118.13679 15.347678 6713.8789 1.0631190e+08 0.042709687 0.046865349 118.18733 15.211197 6716.4553 1.0332300e+08 0.040762845 0.049071938 118.23509 15.077505 6719.0317 1.0306198e+08 0.038474267 0.051339751 118.28059 14.946079 6721.6081 96735926. 0.038823170 0.050487111 118.32898 14.811756 6724.1845 90642580. 0.036253358 0.048386342 118.37953 14.675275 6726.7608 83607682. 0.032318897 0.040958230 118.42707 14.541790 6729.3372 75562719. 0.031185011 0.040820647 118.47257 14.410345 6731.9136 72250610. 0.029133696 0.043568328 118.52119 14.275793 6734.4900 72956811. 0.028912895 0.049324116 118.57173 14.139312 6737.0664 72705050. 0.030847649 0.054347155 118.61905 14.006059 6739.6428 69626551. 0.030220700 0.063613236 118.66455 13.874634 6742.2192 66002129. 0.025385804 0.069144895 118.71338 13.743208 6744.7956 58198511. 0.015064065 0.078408790 118.76393 13.611782 6747.3720 50452236. -0.0029613501 0.067233097 118.81103 13.476909 6749.9484 48390065. -0.070215190 0.072018263 118.85653 13.340429 6752.5248 45584848. -0.026129976 0.073527204 118.90202 13.207506 6755.1012 48583461. 0.090605317 0.074560986 118.94751 13.076080