# # 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 = 45.004268 km # Date (UTC) = 2017-01-27T09:58:16.430 # Date (julian) = 2457780.91546794 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6511.3631 5.0866662e+10 0.10391689 0.035709729 102.23603 48.628625 6514.1285 4.4032771e+10 0.11697913 0.036543614 102.38796 48.426062 6516.8938 3.8331303e+10 0.13029165 0.037377499 102.56786 48.186187 6519.6592 3.3780411e+10 0.14397579 0.038211384 102.72124 47.968694 6522.4245 2.9496650e+10 0.15666279 0.039028421 102.88048 47.746026 6525.1899 2.5977003e+10 0.16339565 0.039760543 103.05226 47.512461 6527.9552 2.2650366e+10 0.16779935 0.041409990 103.18969 47.309934 6530.7206 1.9678080e+10 0.17083514 0.044837518 103.35797 47.072843 6533.4859 1.7307825e+10 0.17367240 0.047726101 103.50627 46.853068 6536.2513 1.5421908e+10 0.17356447 0.048015348 103.64372 46.645570 6539.0167 1.3830887e+10 0.17440967 0.049663790 103.78118 46.443007 6541.7820 1.2343955e+10 0.17407639 0.051072930 103.94433 46.202576 6544.5474 1.0964789e+10 0.17327377 0.052088378 104.08772 45.985588 6547.3127 9.8194818e+09 0.17229443 0.053406284 104.22227 45.778692 6550.0781 8.9139191e+09 0.17099952 0.055004907 104.35315 45.575354 6552.8434 8.0930754e+09 0.16854762 0.055374478 104.51811 45.332263 6555.6088 7.3042879e+09 0.16473708 0.054341849 104.65294 45.124321 6558.3741 6.6052387e+09 0.15958537 0.052920502 104.77964 44.918268 6561.1395 6.0815174e+09 0.15286626 0.051303948 104.90334 44.709247 6563.9048 5.6223192e+09 0.14680447 0.048881683 105.03356 44.506682 6566.6702 5.1986270e+09 0.14266221 0.046803762 105.15857 44.304116 6569.4355 4.7898574e+09 0.13998545 0.044880771 105.28156 44.099107 6572.2009 4.4050095e+09 0.13782548 0.044115109 105.40455 43.889310 6574.9662 4.0524170e+09 0.13507331 0.042390920 105.52753 43.686423 6577.7316 3.7308127e+09 0.13186273 0.039071207 105.65052 43.483857 6580.4970 3.4295199e+09 0.12862194 0.036061497 105.77211 43.279918 6583.2623 3.1532186e+09 0.12598286 0.034888899 105.88785 43.070160 6586.0277 2.9012984e+09 0.12310391 0.033170939 106.00944 42.866219 6588.7930 2.6723900e+09 0.12079651 0.033115102 106.12934 42.663654 6591.5584 2.4795266e+09 0.11752198 0.028571860 106.24509 42.460772 6594.3237 2.2919053e+09 0.11430599 0.025994818 106.36084 42.250973 6597.0891 2.1228082e+09 0.11073328 0.025694620 106.47659 42.045961 6599.8544 1.9707578e+09 0.10872762 0.024981119 106.59032 41.843397 6602.6198 1.8296308e+09 0.10726621 0.026987740 106.69884 41.640829 6605.3851 1.6977868e+09 0.10550273 0.026988137 106.81385 41.431776 6608.1505 1.5661728e+09 0.10232255 0.023728393 106.92586 41.225722 6610.9158 1.4431905e+09 0.097640436 0.024878040 107.03436 41.023191 6613.6812 1.3295151e+09 0.095458413 0.023823520 107.14288 40.820627 6616.4465 1.2339190e+09 0.092798492 0.023352384 107.25139 40.618063 6619.2119 1.1429914e+09 0.091011760 0.024577041 107.35991 40.412838 6621.9772 1.0557404e+09 0.089078270 0.024765533 107.46843 40.203038 6624.7426 9.7695432e+08 0.086790705 0.025259821 107.56982 40.000366 6627.5080 9.1075579e+08 0.084722609 0.025513026 107.66611 39.815261 6630.2733 8.5679442e+08 0.083559957 0.025928975 107.75912 39.641640 6633.0387 8.1461457e+08 0.082092990 0.026159003 107.86031 39.432224 6635.8040 7.6329666e+08 0.080563991 0.026520362 107.96158 39.226840 6638.5694 7.1329471e+08 0.079579863 0.025646836 108.06286 39.024276 6641.3347 6.6782135e+08 0.080364106 0.025149437 108.16415 38.821710 6644.1001 6.1982012e+08 0.079695681 0.025354422 108.26543 38.619144 6646.8654 5.7935422e+08 0.078722718 0.026368121 108.35718 38.429927 6649.6308 5.4047607e+08 0.077813971 0.026764187 108.43778 38.256306 6652.3961 5.1181595e+08 0.077379333 0.027359513 108.53593 38.051988 6655.1615 4.8618572e+08 0.076092505 0.027676943 108.63384 37.845562 6657.9268 4.5713924e+08 0.074059503 0.029976216 108.72850 37.643001 6660.6922 4.2582764e+08 0.072250180 0.032255168 108.82976 37.440478 6663.4575 3.9609173e+08 0.070642152 0.032356415 108.91654 37.258224 6666.2229 3.7008050e+08 0.070314709 0.026952030 108.99834 37.082032 6668.9883 3.4959116e+08 0.068889305 0.028345307 109.09239 36.879469 6671.7536 3.2998835e+08 0.068898695 0.026876088 109.18644 36.676905 6674.5190 3.1231205e+08 0.067630313 0.029392567 109.27613 36.483722 6677.2843 2.9474297e+08 0.065079871 0.031954039 109.35674 36.310099 6680.0497 2.7814529e+08 0.065146006 0.029452141 109.44176 36.110740 6682.8150 2.6801833e+08 0.065991153 0.031047248 109.53096 35.903323 6685.5804 2.5789424e+08 0.065726158 0.033317853 109.62500 35.700757 6688.3457 2.4728836e+08 0.062965138 0.033864995 109.71220 35.498191 6691.1111 2.3464186e+08 0.061444170 0.032975056 109.79201 35.311969 6693.8764 2.2505427e+08 0.060521303 0.031303419 109.86643 35.138348 6696.6418 2.1755682e+08 0.060476828 0.029942434 109.95951 34.937211 6699.4071 2.0846071e+08 0.059185569 0.031214761 110.04943 34.734664 6702.1725 1.9708358e+08 0.057523822 0.033014464 110.13392 34.537515 6704.9378 1.8671724e+08 0.058248837 0.036638084 110.20833 34.363894 6707.7032 1.7674799e+08 0.058100813 0.040086094 110.28571 34.173647 6710.4685 1.6639584e+08 0.056797363 0.040588208 110.36668 33.971080 6713.2339 1.5157578e+08 0.054449336 0.044532600 110.45349 33.768515 6715.9993 1.3760361e+08 0.052246634 0.048400598 110.53026 33.589391 6718.7646 1.2431791e+08 0.049561145 0.051003235 110.60569 33.410063 6721.5300 1.0998652e+08 0.049927024 0.050463579 110.68527 33.207496 6724.2953 1.0176582e+08 0.047243494 0.047460589 110.77074 33.004932 6727.0607 91385438. 0.043852704 0.040879559 110.85442 32.802386 6729.8260 85892507. 0.043016956 0.040494863 110.93341 32.601620 6732.5914 78255729. 0.041303328 0.043849079 111.00162 32.434197 6735.3567 67952416. 0.041795414 0.049672125 111.07481 32.251405 6738.1221 62750520. 0.043750720 0.057993202 111.15439 32.048841 6740.8874 57036424. 0.043052550 0.065566391 111.23397 31.846276 6743.6528 56812354. 0.038127242 0.075451124 111.30589 31.663184 6746.4181 55071741. 0.034692551 0.074125930 111.37479 31.487822 6749.1835 54948024. 0.032092116 0.072227693 111.45437 31.285257 6751.9488 54410782. 0.027661624 0.074112849 111.53394 31.082693 6754.7142 50469292. 0.026125148 0.075064949 111.61351 30.882278 6757.4796 51671242. 0.023789883 0.075284741 111.69308 30.686985 6760.2449 48308703. 0.024980833 0.076528295 111.75662 30.511478 6763.0103 45405842. 0.030396438 0.076469008 111.82390 30.329164 6765.7756 40702160. 0.033373645 0.079672784 111.90348 30.126600 6768.5410 36107200. 0.029712691 0.082802546 111.97642 29.924035 6771.3063 35373090. 0.024149112 0.090048097 112.04876 29.725346 6774.0717 33747163. 0.017133835 0.096755294 112.12222 29.528906 6776.8370 36410644. 0.013649261 0.10346249 112.20180 29.326342 6785.1331 37873268. 0.0023395916 0.12358408 112.40381 28.773703