# # 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 = 43.665744 km # Date (UTC) = 2016-12-11T09:13:23.958 # Date (julian) = 2457733.88430507 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6508.9765 8.3131103e+10 0.095672790 0.034990049 118.60045 25.792908 6511.2649 7.1516929e+10 0.10662325 0.035680113 118.65216 25.684961 6513.5533 6.1588321e+10 0.11770617 0.036370177 118.70005 25.573216 6515.8417 5.3306857e+10 0.12896971 0.037060241 118.74794 25.461472 6518.1301 4.6590002e+10 0.14045851 0.037750305 118.79798 25.351879 6520.4185 4.1072473e+10 0.15218620 0.038440369 118.84987 25.244125 6522.7070 3.6512017e+10 0.16219930 0.039102377 118.90161 25.136236 6524.9954 3.2501615e+10 0.16859965 0.039780570 118.94950 25.024492 6527.2838 2.8992319e+10 0.17270653 0.040922497 118.99739 24.912748 6529.5722 2.5877678e+10 0.17602130 0.043147230 119.04529 24.803103 6531.8606 2.3263808e+10 0.17898054 0.046481290 119.09318 24.695334 6534.1490 2.0913272e+10 0.17988693 0.047986240 119.14132 24.587262 6536.4374 1.8699391e+10 0.17952482 0.048181870 119.19968 24.466037 6538.7258 1.6612649e+10 0.17949936 0.049510121 119.25805 24.344812 6541.0142 1.4732968e+10 0.17821122 0.051321911 119.30809 24.234300 6543.3026 1.3169135e+10 0.17627881 0.051461325 119.35598 24.126546 6545.5911 1.1852602e+10 0.17359551 0.052460862 119.40387 24.017636 6547.8795 1.0692677e+10 0.17065204 0.053621810 119.45176 23.905892 6550.1679 9.6946284e+09 0.16734233 0.055027394 119.49965 23.794148 6552.4563 8.8126965e+09 0.16384939 0.055471919 119.54755 23.685521 6554.7447 8.0357874e+09 0.16058147 0.054848007 119.59544 23.577752 6557.0331 7.3370739e+09 0.15771327 0.053845356 119.64334 23.469988 6559.3215 6.7111244e+09 0.15440865 0.052350891 119.69123 23.362234 6561.6099 6.1641151e+09 0.15119668 0.051072123 119.73912 23.254480 6563.8983 5.6712915e+09 0.14779485 0.048889199 119.78393 23.146726 6566.1867 5.2214703e+09 0.14513707 0.047077242 119.82783 23.038971 6568.4752 4.8211041e+09 0.14301450 0.045334881 119.87279 22.931218 6570.7636 4.4571395e+09 0.14099066 0.044601214 119.92068 22.823464 6573.0520 4.1309353e+09 0.13877472 0.043615772 119.96858 22.715711 6575.3404 3.8374407e+09 0.13609632 0.042033194 120.01647 22.607946 6577.6288 3.5729286e+09 0.13312339 0.039232687 120.06437 22.500178 6579.9172 3.3346428e+09 0.13003996 0.036566269 120.11124 22.392413 6582.2056 3.1164886e+09 0.12707682 0.035237841 120.15514 22.284659 6584.4940 2.9103437e+09 0.12423105 0.034246397 120.19904 22.176905 6586.7824 2.7157645e+09 0.12147381 0.033161182 120.24593 22.069151 6589.0708 2.5363260e+09 0.11865885 0.032905428 120.29382 21.961397 6591.3593 2.3576980e+09 0.11534236 0.028796533 120.34074 21.853643 6593.6477 2.2054106e+09 0.11209704 0.026500090 120.38464 21.745890 6595.9361 2.0585288e+09 0.10828245 0.025720645 120.42854 21.638137 6598.2245 1.9347500e+09 0.10522959 0.025299989 120.47244 21.530372 6600.5129 1.8223997e+09 0.10365579 0.026044290 120.51635 21.422604 6602.8013 1.7090232e+09 0.10212470 0.026832833 120.56119 21.314839 6605.0897 1.6153946e+09 0.10096817 0.026740306 120.60907 21.207085 6607.3781 1.5194868e+09 0.099491160 0.024960344 120.65696 21.099331 6609.6665 1.4273942e+09 0.096611231 0.023903923 120.70594 20.981772 6611.9549 1.3340833e+09 0.094321019 0.024349484 120.75533 20.860547 6614.2434 1.2317073e+09 0.093676405 0.023772832 120.80197 20.746065 6616.5318 1.1475303e+09 0.092487619 0.023365759 120.84587 20.638311 6618.8202 1.0755369e+09 0.092030556 0.024390123 120.88977 20.530566 6621.1086 1.0122175e+09 0.091397001 0.025053456 120.93367 20.426774 6623.3970 9.5898693e+08 0.089867586 0.024638905 120.97757 20.323011 6625.6854 9.0322335e+08 0.088687658 0.026215495 121.02148 20.217289 6627.9738 8.5545127e+08 0.086986521 0.025692979 121.06538 20.109521 6630.2622 8.1093917e+08 0.085555131 0.025928948 121.10929 20.001753 6632.5506 7.6626891e+08 0.083962738 0.026098370 121.15319 19.893999 6634.8390 7.2310192e+08 0.082544321 0.026388046 121.19709 19.786245 6637.1275 6.8413737e+08 0.081010920 0.026098990 121.24361 19.672051 6639.4159 6.4769753e+08 0.080256941 0.025479437 121.29300 19.550825 6641.7043 6.0656574e+08 0.080744468 0.025150692 121.34101 19.433978 6643.9927 5.7058659e+08 0.079740635 0.025342501 121.38491 19.330216 6646.2811 5.3347090e+08 0.078743431 0.026065649 121.42881 19.226454 6648.5695 5.0671694e+08 0.077485115 0.027345510 121.46974 19.119707 6650.8579 4.8346894e+08 0.076871621 0.026451637 121.50965 19.011939 6653.1463 4.5573261e+08 0.076581877 0.027600367 121.55052 18.905131 6655.4347 4.3306505e+08 0.075333853 0.027789848 121.59442 18.801368 6657.7231 4.0796755e+08 0.074026073 0.029739931 121.63832 18.697605 6660.0115 3.9128126e+08 0.072894172 0.031636496 121.68625 18.581025 6662.3000 3.6609393e+08 0.071800366 0.032875976 121.73564 18.459800 6664.5884 3.4137037e+08 0.071240280 0.030053269 121.78022 18.347423 6666.8768 3.2170429e+08 0.071357142 0.027079447 121.82013 18.243659 6669.1652 2.9886569e+08 0.070562409 0.028186042 121.86005 18.139883 6671.4536 2.8804883e+08 0.070787708 0.026871813 121.90394 18.032139 6673.7420 2.7642234e+08 0.070253963 0.028568946 121.94784 17.924385 6676.0304 2.6537578e+08 0.068050782 0.031733329 121.99224 17.812175 6678.3188 2.5197179e+08 0.067132552 0.030723368 122.03715 17.695422 6680.6072 2.4193354e+08 0.067683989 0.029572545 122.08071 17.581084 6682.8956 2.2712883e+08 0.068445668 0.031108852 122.12062 17.473330 6685.1841 2.1499299e+08 0.068210997 0.032899248 122.16053 17.365577 6687.4725 2.0454808e+08 0.066069907 0.034079400 122.20766 17.250973 6689.7609 1.8911825e+08 0.063649587 0.033331112 122.25705 17.134237 6692.0493 1.8086751e+08 0.062332239 0.032708094 122.30137 17.024446 6694.3377 1.7452961e+08 0.061158540 0.030787726 122.34127 16.920683 6696.6261 1.6765390e+08 0.060508265 0.029935920 122.38133 16.816402 6698.9145 1.5959750e+08 0.058865554 0.031473097 122.42623 16.695177 6701.2029 1.5133883e+08 0.056561670 0.031707198 122.47113 16.573952 6703.4913 1.4026847e+08 0.055997079 0.034904716 122.51203 16.466739 6705.7797 1.3272388e+08 0.055597252 0.038054838 122.55193 16.362977 6708.0682 1.2685435e+08 0.054801642 0.040117798 122.59332 16.255360 6710.3566 1.1959348e+08 0.052923801 0.040566288 122.63823 16.138607 6712.6450 1.1214099e+08 0.050190029 0.043027464 122.68313 16.021855 6714.9334 1.0606847e+08 0.047495668 0.047373580 122.72803 15.905120 6717.2218 1.0220826e+08 0.044778179 0.049860549 122.77293 15.788384 6719.5102 99143314. 0.042334422 0.050885106 122.81362 15.682579 6721.7986 96761651. 0.042062925 0.050544526 122.85353 15.578816 6724.0870 88067735. 0.038824057 0.049199942 122.89512 15.469171 6726.3754 81958116. 0.034100427 0.040954753 122.94002 15.347946 6728.6638 81520958. 0.033121109 0.040568986 122.98492 15.227213 6730.9523 80719030. 0.030920885 0.041684561 123.02982 15.110478 6733.2407 79826110. 0.029190546 0.045230946 123.07472 14.993742 6735.5291 74426191. 0.028724127 0.049855084 123.11521 14.888452 6737.8175 67408291. 0.028478276 0.056739683 123.15512 14.784689 6740.1059 63303213. 0.026748902 0.064231264 123.19691 14.676034 6742.3943 59741517. 0.022082158 0.069571548 123.24181 14.559282 6744.6827 55079664. 0.014812000 0.078321474 123.28672 14.442531 6746.9711 53605865. 0.0069731892 0.067696877 123.33161 14.325796 6749.2595 52175055. -0.00022881637 0.072206873 123.37651 14.209061 6751.5479 49652633. -0.039369866 0.073943345 123.41727 14.092326 6753.8364 48522234. -0.014404239 0.075683882 123.45768 13.975591 6758.4132 44136473. 0.054463172 0.074579032 123.54611 13.749730