# # 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 = 39.738719 km # Date (UTC) = 2016-12-19T10:35:13.703 # Date (julian) = 2457741.94113082 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6514.7235 4.5437806e+10 0.12790479 0.036723028 98.312674 26.769062 6516.9980 4.1787408e+10 0.13942843 0.037408901 98.359085 26.672673 6519.2725 3.8295428e+10 0.15103893 0.038094773 98.409438 26.568093 6521.5470 3.4945478e+10 0.16272959 0.038780646 98.461003 26.460994 6523.8215 3.1424248e+10 0.16913653 0.039382719 98.511604 26.352924 6526.0960 2.8092745e+10 0.17319664 0.039768741 98.559211 26.241844 6528.3705 2.5149833e+10 0.17755396 0.041736418 98.606818 26.130764 6530.6450 2.2509964e+10 0.18009198 0.044731729 98.657287 26.022562 6532.9195 2.0168332e+10 0.18246152 0.047452373 98.708853 25.915462 6535.1941 1.8201622e+10 0.18257460 0.048140117 98.760418 25.808362 6537.4686 1.6487139e+10 0.18196011 0.048906133 98.811983 25.701263 6539.7431 1.4949016e+10 0.18120591 0.050543101 98.863548 25.594163 6542.0176 1.3542205e+10 0.17877671 0.051008915 98.915116 25.487064 6544.2921 1.2216149e+10 0.17629141 0.051881303 98.966684 25.379965 6546.5666 1.1107046e+10 0.17358741 0.052930753 99.017618 25.272864 6548.8411 1.0127882e+10 0.17035946 0.053918833 99.065222 25.165750 6551.1156 9.2693288e+09 0.16687992 0.055276339 99.112826 25.058637 6553.3901 8.5078282e+09 0.16292382 0.055138948 99.160428 24.951532 6555.6647 7.8042297e+09 0.15832157 0.054294898 99.208029 24.844432 6557.9392 7.1730590e+09 0.15435791 0.053277437 99.256099 24.737332 6560.2137 6.5890709e+09 0.15052068 0.052081654 99.307664 24.630233 6562.4882 6.0459837e+09 0.14710558 0.050415377 99.359230 24.523133 6564.7627 5.5492546e+09 0.14399704 0.048425943 99.408427 24.416034 6567.0372 5.1113187e+09 0.14136024 0.046585727 99.456028 24.308934 6569.3117 4.7056561e+09 0.13890453 0.044872712 99.503629 24.201833 6571.5862 4.3472028e+09 0.13691968 0.044343164 99.551236 24.094720 6573.8607 4.0220610e+09 0.13418142 0.042966758 99.598844 23.987607 6576.1353 3.7309169e+09 0.13153272 0.041215716 99.646446 23.882705 6578.4098 3.4682389e+09 0.12858915 0.038002551 99.694043 23.779572 6580.6843 3.2225876e+09 0.12561777 0.035888385 99.741641 23.676303 6582.9588 2.9981981e+09 0.12315848 0.035032882 99.789242 23.569203 6585.2333 2.7905788e+09 0.12048567 0.033784258 99.836843 23.462104 6587.5078 2.6019093e+09 0.11794811 0.033270880 99.884444 23.355004 6589.7823 2.4290541e+09 0.11520399 0.031493929 99.932045 23.247904 6592.0568 2.2679292e+09 0.11192708 0.028018328 99.979645 23.140805 6594.3313 2.1112353e+09 0.10875305 0.025990634 100.02725 23.033692 6596.6059 1.9654615e+09 0.10527551 0.025724519 100.07485 22.926579 6598.8804 1.8247724e+09 0.10252919 0.024986849 100.12246 22.821344 6601.1549 1.7032331e+09 0.10164853 0.027118626 100.17006 22.718211 6603.4294 1.5964867e+09 0.099562579 0.026409079 100.21766 22.615078 6605.7039 1.4926290e+09 0.098245244 0.027255555 100.26149 22.508173 6607.9784 1.3995732e+09 0.095703258 0.023775011 100.30512 22.401074 6610.2529 1.3165774e+09 0.092467863 0.024244635 100.35046 22.293974 6612.5274 1.2358691e+09 0.090757887 0.023926677 100.39805 22.186875 6614.8019 1.1610225e+09 0.089963517 0.023387988 100.44565 22.079775 6617.0765 1.0879893e+09 0.088895541 0.023464596 100.48965 21.976268 6619.3510 1.0202995e+09 0.088536533 0.024610596 100.53329 21.873121 6621.6255 9.6374625e+08 0.087774652 0.024882131 100.57847 21.768441 6623.9000 9.0266899e+08 0.086149352 0.024825255 100.62607 21.661342 6626.1745 8.4383051e+08 0.085159966 0.026368582 100.67367 21.554243 6628.4490 7.9202499e+08 0.083714051 0.025885396 100.71783 21.450583 6630.7235 7.4530125e+08 0.082227060 0.025930085 100.76146 21.347450 6632.9980 7.0368641e+08 0.080934205 0.026152017 100.80853 21.238312 6635.2725 6.6018655e+08 0.079496520 0.026440659 100.86208 21.117823 6637.5470 6.0993691e+08 0.078325056 0.025893483 100.91459 20.999159 6639.8216 5.6598337e+08 0.078109348 0.025334430 100.95822 20.896026 6642.0961 5.2668360e+08 0.078398124 0.025155628 101.00185 20.792892 6644.3706 4.9819261e+08 0.077357217 0.025383658 101.04549 20.687434 6646.6451 4.7357615e+08 0.076224076 0.026254069 101.08913 20.580320 6648.9196 4.4761436e+08 0.074949386 0.027579871 101.13276 20.473459 6651.1941 4.2200677e+08 0.074551737 0.026632927 101.17640 20.370326 6653.4686 3.9755509e+08 0.073994624 0.027764926 101.22003 20.267194 6655.7431 3.7782179e+08 0.072287113 0.027917282 101.26366 20.161910 6658.0176 3.6311686e+08 0.070722810 0.030092380 101.30730 20.054811 6660.2922 3.4643740e+08 0.069326178 0.031891557 101.35105 19.947522 6662.5667 3.2599707e+08 0.068158348 0.032726335 101.40014 19.831495 6664.8412 3.0410861e+08 0.067625380 0.029128238 101.44922 19.715468 6667.1157 2.8347943e+08 0.067482413 0.027145954 101.49406 19.609494 6669.3902 2.6704115e+08 0.066602719 0.027954936 101.53770 19.506348 6671.6647 2.5008823e+08 0.066717227 0.026874821 101.58134 19.403205 6673.9392 2.3242872e+08 0.066089374 0.028863899 101.62497 19.300072 6676.2137 2.1452447e+08 0.063862517 0.031851477 101.66860 19.196939 6678.4882 1.9743496e+08 0.062974662 0.030610052 101.71224 19.090876 6680.7628 1.8631410e+08 0.063678272 0.029606128 101.75587 18.983777 6683.0373 1.7581865e+08 0.064337562 0.031243201 101.79972 18.874733 6685.3118 1.6820379e+08 0.064004520 0.033034156 101.84434 18.758706 6687.5863 1.5823177e+08 0.061852275 0.034015919 101.88897 18.642679 6689.8608 1.4345954e+08 0.059540307 0.033241163 101.93262 18.539249 6692.1353 1.3322621e+08 0.058385575 0.032608196 101.97626 18.436116 6694.4098 1.2038775e+08 0.057463123 0.030686634 102.02238 18.327098 6696.6843 1.1442235e+08 0.057063825 0.029960114 102.07148 18.211055 6698.9588 1.0986466e+08 0.055736892 0.031533946 102.11854 18.097792 6701.2334 1.0670609e+08 0.053848233 0.031751850 102.15821 17.994660 6703.5079 1.0448147e+08 0.053746087 0.034946087 102.19787 17.891527 6705.7824 1.0122508e+08 0.053807005 0.038059521 102.24408 17.779442 6708.0569 96830073. 0.053498815 0.040105531 102.29317 17.663416 6710.3314 92196503. 0.052215801 0.040561363 102.33799 17.553236 6712.6059 89639806. 0.050230569 0.042954938 102.37765 17.450102 6714.8804 83028601. 0.048196250 0.047369599 102.41732 17.346969 6717.1549 83108879. 0.046310413 0.049864685 102.46161 17.231814 6719.4294 77361417. 0.044347360 0.050961833 102.50623 17.115788 6721.7040 74669874. 0.044696766 0.050516005 102.55018 17.008669 6723.9785 67172070. 0.042513315 0.049914653 102.59381 16.905522 6726.2530 58220433. 0.038021379 0.040953649 102.63762 16.800175 6728.5275 59545006. 0.037380312 0.040375728 102.68225 16.684149 6730.8020 60991231. 0.035454560 0.041478546 102.72688 16.568123 6733.0765 61290079. 0.033494446 0.044339719 102.77150 16.452096 6735.3510 56721698. 0.031940525 0.049666071 102.81613 16.336069 6737.6255 49547149. 0.027957686 0.056128223 102.85734 16.228928 6739.9000 46255243. -0.00037487366 0.063928037 102.89700 16.125796 6742.1746 47744377. 0.020127098 0.069036092 102.93750 16.020497 6744.4491 46795621. 0.062862150 0.078140755 102.98213 15.904470