# # 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 = 50.407269 km # Date (UTC) = 2016-01-08T10:58:35.208 # Date (julian) = 2457395.95735194 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6494.9419 7.1821790e+10 0.030261700 0.030757952 91.261383 34.386079 6497.5790 6.4562689e+10 0.038884659 0.031553149 91.338991 34.245811 6500.2160 5.8664875e+10 0.047549097 0.032348345 91.416599 34.106116 6502.8531 5.3920101e+10 0.056494564 0.033143542 91.485970 33.976853 6505.4901 4.9726615e+10 0.065903030 0.033938738 91.554963 33.848067 6508.1272 4.5628662e+10 0.075844240 0.034733935 91.630694 33.710750 6510.7642 4.1515823e+10 0.086417810 0.035529131 91.708303 33.571056 6513.4013 3.7497835e+10 0.097692835 0.036324327 91.785911 33.426969 6516.0383 3.3731540e+10 0.10981109 0.037119524 91.863520 33.282102 6518.6754 3.0212705e+10 0.12278763 0.037914720 91.936386 33.141975 6521.3124 2.7005505e+10 0.13665927 0.038709917 92.008820 33.002281 6523.9495 2.4354159e+10 0.14600946 0.039414440 92.077860 32.873334 6526.5865 2.2111048e+10 0.15391787 0.040283004 92.146844 32.744565 6529.2236 2.0132184e+10 0.16088871 0.042591947 92.218620 32.606955 6531.8606 1.8158144e+10 0.16785398 0.046481359 92.291054 32.467260 6534.4977 1.6242857e+10 0.17243270 0.048083783 92.363487 32.327566 6537.1348 1.4536959e+10 0.17563350 0.048748756 92.435921 32.187872 6539.7718 1.3019193e+10 0.17726560 0.050577878 92.513234 32.043296 6542.4089 1.1706959e+10 0.17553476 0.051157463 92.590624 31.898676 6545.0459 1.0637689e+10 0.17320727 0.052455978 92.650441 31.774465 6547.6830 9.7401651e+09 0.16976783 0.053547084 92.710237 31.650278 6550.3200 8.9707522e+09 0.16703479 0.055065489 92.780607 31.513116 6552.9571 8.2324146e+09 0.16437966 0.055345872 92.853041 31.373423 6555.5941 7.4979547e+09 0.16130359 0.054354157 92.925474 31.229052 6558.2312 6.8440251e+09 0.15843610 0.053042312 92.997908 31.084184 6560.8682 6.2291156e+09 0.15481278 0.051491487 93.070341 30.944341 6563.5053 5.6926908e+09 0.15166398 0.049343869 93.142290 30.805241 6566.1423 5.2636479e+09 0.14859010 0.047102364 93.202075 30.681072 6568.7794 4.9025995e+09 0.14620784 0.045055216 93.261859 30.556902 6571.4164 4.5831062e+09 0.14410937 0.044389536 93.328104 30.414851 6574.0535 4.2587573e+09 0.14119470 0.042829311 93.395367 30.269983 6576.6906 3.9213315e+09 0.13851702 0.040576554 93.467454 30.129912 6579.3276 3.6191977e+09 0.13503274 0.036890399 93.539877 29.990224 6581.9647 3.3681748e+09 0.13197656 0.035304497 93.599701 29.866005 6584.6017 3.1557801e+09 0.12877954 0.034187736 93.659485 29.741834 6587.2388 2.9665676e+09 0.12558964 0.033211270 93.725433 29.604871 6589.8758 2.7755205e+09 0.12224158 0.031308434 93.792696 29.465177 6592.5129 2.5806398e+09 0.11824253 0.027575372 93.859955 29.325483 6595.1499 2.3934705e+09 0.11421010 0.025639119 93.927213 29.185789 6597.7870 2.2059955e+09 0.11016139 0.025474387 93.994472 29.046095 6600.4240 2.0395963e+09 0.10814988 0.025861605 94.061420 28.906800 6603.0611 1.9045724e+09 0.10639470 0.026627112 94.116608 28.782630 6605.6981 1.7878230e+09 0.10534413 0.027250725 94.171796 28.658459 6608.3352 1.6859099e+09 0.10296353 0.023723509 94.237260 28.521074 6610.9722 1.5827985e+09 0.099587262 0.024931936 94.304519 28.381380 6613.6093 1.4867893e+09 0.098649449 0.023797143 94.371790 28.241667 6616.2464 1.3967136e+09 0.097223345 0.023320964 94.439063 28.101952 6618.8834 1.3062624e+09 0.096730136 0.024437871 94.501219 27.962258 6621.5205 1.2172514e+09 0.096036790 0.024916939 94.563303 27.822564 6624.1575 1.1343258e+09 0.094257255 0.024946625 94.625390 27.682869 6626.7946 1.0602328e+09 0.092604341 0.025578555 94.687201 27.545045 6629.4316 1.0007536e+09 0.091294424 0.026031067 94.746985 27.420875 6632.0687 9.5488536e+08 0.089297212 0.026040580 94.806769 27.296705 6634.7057 9.1270820e+08 0.087577818 0.026378322 94.868733 27.157850 6637.3428 8.6892371e+08 0.085811781 0.025993530 94.930820 27.018156 6639.9798 8.1470629e+08 0.085443153 0.025277861 94.992908 26.878461 6642.6169 7.6158372e+08 0.085325218 0.025176940 95.054996 26.738766 6645.2539 7.1126985e+08 0.084053990 0.025570645 95.117079 26.599072 6647.8910 6.6772041e+08 0.082603135 0.026906891 95.179165 26.459375 6650.5280 6.2832872e+08 0.081496485 0.026376121 95.241262 26.319660 6653.1651 5.9134509e+08 0.080729153 0.027609954 95.301872 26.183289 6655.8022 5.6351060e+08 0.078526712 0.027941666 95.357060 26.059119 6658.4392 5.3481091e+08 0.076351930 0.030840016 95.412318 25.934318 6661.0763 5.1096936e+08 0.074427611 0.032573789 95.469227 25.794624 6663.7133 4.8647420e+08 0.072832209 0.032285537 95.526695 25.655488 6666.3504 4.5723525e+08 0.072869928 0.026976868 95.588782 25.520967 6668.9874 4.3306957e+08 0.071732444 0.028344568 95.650870 25.385541 6671.6245 4.0728816e+08 0.072013916 0.026874248 95.712958 25.245847 6674.2615 3.8365597e+08 0.071169102 0.029175403 95.773792 25.106153 6676.8986 3.6478465e+08 0.068652924 0.032292851 95.830704 24.966460 6679.5356 3.4309376e+08 0.068443753 0.029825151 95.887617 24.828368 6682.1727 3.2697645e+08 0.069507863 0.030556479 95.944529 24.693848 6684.8097 3.0914275e+08 0.069640199 0.032695183 96.003390 24.557378 6687.4468 2.9114085e+08 0.067558923 0.034093721 96.065474 24.417684 6690.0838 2.7769507e+08 0.065019050 0.033106255 96.125266 24.277980 6692.7209 2.6570445e+08 0.063796323 0.031928195 96.182187 24.138265 6695.3579 2.5710091e+08 0.063000378 0.029793723 96.239104 24.001207 6697.9950 2.4546031e+08 0.062055031 0.030217185 96.296017 23.866686 6700.6321 2.3210374e+08 0.059829328 0.031136532 96.352929 23.729173 6703.2691 2.1913373e+08 0.059097654 0.034348633 96.409842 23.589480 6705.9062 2.0651758e+08 0.059017335 0.038279581 96.466754 23.453128 6708.5432 1.9677060e+08 0.058351231 0.040635121 96.523667 23.318608 6711.1803 1.8394900e+08 0.056298086 0.040897330 96.580580 23.180398 6713.8173 1.7357823e+08 0.053616592 0.046642705 96.637493 23.040703 6716.4544 1.6414092e+08 0.051393243 0.049070614 96.694406 22.905046 6719.0914 1.5255789e+08 0.048725367 0.051282974 96.751318 22.770526 6721.7285 1.4359054e+08 0.049306656 0.050523394 96.808231 22.631621 6724.3655 1.3463079e+08 0.046610887 0.046874201 96.865143 22.491927 6727.0026 1.2778442e+08 0.043654780 0.040956937 96.929493 22.339386 6729.6396 1.2541192e+08 0.043358631 0.040619089 96.991564 22.188784 6732.2767 1.2241657e+08 0.041939270 0.043791148 97.043302 22.049090 6734.9137 1.1765131e+08 0.042362201 0.049298622 97.096544 21.910900 6737.5508 1.1075115e+08 0.044997073 0.055890160 97.153457 21.776380 6740.1879 1.0276752e+08 0.045726707 0.064371281 97.210373 21.641853 6742.8249 96078076. 0.043033233 0.070620798 97.267294 21.507313 6745.4620 91278994. 0.040313129 0.078761092 97.322010 21.370580 6748.0990 87500994. 0.037026723 0.067537825 97.373748 21.230886 6750.7361 83821563. 0.035173312 0.073260998 97.432040 21.084274 6753.3731 80961436. 0.033102900 0.074184781 97.497084 20.930533 6756.0102 81197112. 0.031079478 0.074193092 97.551465 20.792195 6758.6472 79598233. 0.031579191 0.075073973 97.603203 20.657674 6761.2843 75018830. 0.034135439 0.077991712 97.661361 20.506459 6763.9213 69644737. 0.040833190 0.079243711 97.719180 20.356129 6766.5584 63105938. 0.043910389 0.080976833 97.770917 20.221610 6769.1954 59932831. 0.040222812 0.084928294 97.823921 20.085825 6771.8325 56835636. 0.037439043 0.091324307 97.880834 19.946131 6774.4695 56525318. 0.034876845 0.097720321 97.938438 19.802057 6777.1066 56974659. 0.033886911 0.10411633 97.997568 19.648316 6779.7437 52337426. 0.058156620 0.11051235 98.052112 19.506505 6782.3807 50265797. 0.029398858 0.11690836 98.103854 19.371984 6785.0178 46518375. -0.029845644 0.12330438 98.160678 19.224242