# # 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 = 50.124615 km # Date (UTC) = 2015-12-31T09:36:33.149 # Date (julian) = 2457387.90038367 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6495.8835 9.0374427e+10 0.030335656 0.031041895 112.32363 30.902749 6498.2565 8.0292352e+10 0.038566909 0.031757452 112.38157 30.787690 6500.6294 7.2734328e+10 0.047046630 0.032473008 112.43951 30.675956 6503.0024 6.5990519e+10 0.055827632 0.033188565 112.49744 30.564222 6505.3753 5.9438649e+10 0.064925436 0.033904122 112.56105 30.441547 6507.7483 5.2942628e+10 0.074335706 0.034619678 112.62623 30.315843 6510.1212 4.7056558e+10 0.084197712 0.035335235 112.68681 30.199014 6512.4942 4.2249187e+10 0.094747018 0.036050792 112.74475 30.087279 6514.8671 3.8340750e+10 0.10608753 0.036766349 112.80268 29.974635 6517.2401 3.5017982e+10 0.11822919 0.037481905 112.86063 29.858747 6519.6130 3.1994334e+10 0.13109782 0.038197462 112.91857 29.742858 6521.9860 2.9257222e+10 0.14469518 0.038913019 112.97651 29.630305 6524.3589 2.6805891e+10 0.15247417 0.039554466 113.03444 29.518571 6526.7319 2.4469567e+10 0.15960515 0.040435360 113.09338 29.401440 6529.1048 2.2197202e+10 0.16528629 0.042402743 113.15390 29.275736 6531.4778 2.0029298e+10 0.17080967 0.045924069 113.21381 29.153363 6533.8507 1.8101617e+10 0.17478916 0.047881114 113.27175 29.041628 6536.2237 1.6461650e+10 0.17607489 0.047990618 113.32968 28.929893 6538.5966 1.5067408e+10 0.17741698 0.049447200 113.38422 28.818159 6540.9696 1.3846189e+10 0.17626444 0.051312149 113.43802 28.706424 6543.3425 1.2769884e+10 0.17405510 0.051471787 113.49350 28.594683 6545.7155 1.1862131e+10 0.17129930 0.052461977 113.55144 28.482934 6548.0884 1.1007259e+10 0.16925421 0.053694048 113.60939 28.371168 6550.4614 1.0119858e+10 0.16711636 0.055100880 113.66988 28.245630 6552.8343 9.2297610e+09 0.16513692 0.055376771 113.73040 28.119926 6555.2073 8.4009219e+09 0.16288158 0.054679217 113.78527 28.005977 6557.5802 7.7046212e+09 0.16039190 0.053502430 113.83907 27.894242 6559.9532 7.1343036e+09 0.15769989 0.052279596 113.89287 27.782508 6562.3261 6.6392847e+09 0.15451019 0.050569598 113.94667 27.670773 6564.6991 6.1921294e+09 0.15160105 0.048454784 114.00046 27.559038 6567.0720 5.7856842e+09 0.14917378 0.046556302 114.05427 27.447289 6569.4450 5.4144251e+09 0.14684363 0.044881384 114.10807 27.335540 6571.8179 5.0438328e+09 0.14484578 0.044279889 114.16310 27.215524 6574.1909 4.6716838e+09 0.14202566 0.042763337 114.21897 27.089820 6576.5638 4.3188296e+09 0.13938291 0.040722439 114.27392 26.970326 6578.9368 4.0007365e+09 0.13595474 0.037170366 114.32771 26.858592 6581.3097 3.7350662e+09 0.13290783 0.035502826 114.38151 26.746857 6583.6827 3.5088927e+09 0.12987985 0.034676136 114.43531 26.635122 6586.0556 3.2978932e+09 0.12657994 0.033170577 114.48911 26.523387 6588.4286 3.1150241e+09 0.12361298 0.033236813 114.54038 26.411653 6590.8015 2.9565631e+09 0.11982428 0.029571141 114.59004 26.299918 6593.1745 2.7928788e+09 0.11671151 0.026940030 114.64182 26.185452 6595.5474 2.6191103e+09 0.11367096 0.025680339 114.70235 26.059730 6597.9204 2.4395520e+09 0.11162987 0.025432298 114.76237 25.934676 6600.2933 2.2734780e+09 0.11116287 0.025592854 114.81203 25.822941 6602.6663 2.1352428e+09 0.11059162 0.026948079 114.86168 25.711206 6605.0392 2.0230746e+09 0.10983435 0.026697932 114.91134 25.602083 6607.4122 1.9210859e+09 0.10833003 0.024893147 114.96101 25.494487 6609.7851 1.8240564e+09 0.10522822 0.023939144 115.01200 25.383002 6612.1581 1.7225144e+09 0.10285607 0.024202661 115.06787 25.257298 6614.5310 1.6170886e+09 0.10194697 0.023574652 115.12332 25.132528 6616.9040 1.5175264e+09 0.10061361 0.023424174 115.17298 25.020794 6619.2769 1.4345277e+09 0.099961571 0.024592726 115.22264 24.909060 6621.6499 1.3666401e+09 0.098875733 0.024874051 115.27230 24.800008 6624.0228 1.3041326e+09 0.096755755 0.024874515 115.32197 24.692397 6626.3958 1.2405667e+09 0.095191275 0.026086680 115.37309 24.580547 6628.7687 1.1654432e+09 0.093555892 0.026015195 115.42896 24.454844 6631.1417 1.0932318e+09 0.091667121 0.025945155 115.48429 24.330347 6633.5146 1.0296488e+09 0.090031717 0.026242097 115.53395 24.218613 6635.8875 9.7737920e+08 0.088117235 0.026532889 115.58361 24.106878 6638.2605 9.3446367e+08 0.086629140 0.025660293 115.63743 23.988903 6640.6334 8.8189420e+08 0.086504592 0.025193149 115.69330 23.867855 6643.0064 8.2599345e+08 0.085987644 0.025193585 115.74592 23.751669 6645.3793 7.7253038e+08 0.084757141 0.025629395 115.79558 23.639935 6647.7523 7.2413077e+08 0.083692596 0.026833868 115.84480 23.528637 6650.1252 6.9118833e+08 0.083028802 0.026283910 115.89033 23.421026 6652.4982 6.6189746e+08 0.082685455 0.027387595 115.93586 23.313416 6654.8711 6.3287961e+08 0.081775797 0.027665109 115.98852 23.193331 6657.2441 5.9884731e+08 0.079990772 0.029184256 116.04439 23.067627 6659.6170 5.6251239e+08 0.078681610 0.031705882 116.09465 22.951730 6661.9900 5.3101578e+08 0.077330995 0.033039176 116.14017 22.844133 6664.3629 5.0318869e+08 0.076303003 0.030878084 116.18641 22.734270 6666.7359 4.7820405e+08 0.076295713 0.027051994 116.23762 22.608567 6669.1088 4.5140336e+08 0.075200835 0.028243911 116.28883 22.482863 6671.4818 4.2692016e+08 0.075390338 0.026872214 116.33853 22.374854 6673.8547 4.0623107e+08 0.074724181 0.028737551 116.38819 22.267258 6676.2277 3.9171505e+08 0.072309354 0.031860472 116.43872 22.152109 6678.6006 3.7801712e+08 0.071253809 0.030534877 116.48994 22.031043 6680.9736 3.6397708e+08 0.072041844 0.029651656 116.54116 21.908061 6683.3465 3.4502875e+08 0.072632769 0.031696444 116.59237 21.782358 6685.7195 3.2459066e+08 0.072260291 0.033464800 116.64207 21.661459 6688.0924 3.0955862e+08 0.069706707 0.033806529 116.68759 21.553862 6690.4654 2.9786123e+08 0.067699106 0.033062529 116.73312 21.446265 6692.8383 2.9062603e+08 0.066576173 0.031791812 116.78347 21.327251 6695.2113 2.8112345e+08 0.065853244 0.029820662 116.83468 21.206203 6697.5842 2.6669395e+08 0.065192350 0.030165202 116.88589 21.085155 6699.9572 2.5110236e+08 0.063731591 0.030707219 116.93711 20.964107 6702.3301 2.3491460e+08 0.062424607 0.033140349 116.98517 20.848210 6704.7031 2.2269804e+08 0.062973411 0.036522808 117.03069 20.736475 6707.0760 2.1189264e+08 0.062814924 0.040175933 117.07699 20.623469 6709.4490 2.0385325e+08 0.062116766 0.040846964 117.12821 20.502420 6711.8219 1.9204422e+08 0.060120778 0.041627375 117.17942 20.381372 6714.1949 1.8164122e+08 0.057936256 0.047318060 117.23064 20.260307 6716.5678 1.7362861e+08 0.056006798 0.049237735 117.28186 20.139242 6718.9408 1.6861890e+08 0.053398936 0.051277622 117.32481 20.029505 6721.3137 1.6392919e+08 0.053733696 0.050398430 117.36619 19.921909 6723.6867 1.5500616e+08 0.052056382 0.049751922 117.41175 19.808601 6726.0596 1.4846852e+08 0.047845005 0.040951905 117.46296 19.687553 6728.4326 1.4369441e+08 0.046999127 0.040241218 117.51288 19.566505 6730.8055 1.4003464e+08 0.045133079 0.041483393 117.55944 19.445458 6733.1785 1.3326057e+08 0.043659430 0.044893365 117.60659 19.324410 6735.5514 1.2806386e+08 0.044176976 0.049878823 117.65781 19.203361 6737.9244 1.2021425e+08 0.045571943 0.057080222 117.70902 19.082313 6740.2973 1.1448959e+08 0.045011328 0.064558310 117.75567 18.961265 6742.6703 1.0791150e+08 0.041598812 0.070244029 117.80222 18.840217 6745.0432 1.0149928e+08 0.037484369 0.078585062 117.85266 18.719170 6747.4162 97135067. 0.032711652 0.067217885 117.90387 18.598122 6749.7891 90862267. 0.030491553 0.072061867 117.95190 18.477062 6752.1621 85419395. 0.026928353 0.073946914 117.99846 18.355996 6754.5350 83875969. 0.025295183 0.075353069 118.04502 18.234940 6756.9080 79774840. 0.022107588 0.076503286 118.09158 18.113893 6759.2809 76034042. 0.022830453 0.075887748 118.13995 17.992846 6761.6539 71740455. 0.025062865 0.078022248 118.19117 17.871797 6764.0268 69012323. 0.028942045 0.079484571 118.24125 17.750749 6766.3998 68130174. 0.030062356 0.080618063 118.28781 17.629701 6768.7727 64593926. 0.025234492 0.083636499 118.33437 17.508653 6771.1457 60414216. 0.020241309 0.089658484 118.38092 17.387606 6773.5186 59211555. 0.015556408 0.095413930 118.42748 17.266558 6775.8916 59811408. 0.010941082 0.10116938 118.47403 17.149914 6778.2645 57574502. 0.0058071537 0.10692482 118.52059 17.033522 6780.6375 55258269. 0.00019952862 0.11268027 118.57245 16.899614 6783.0104 49576695. -0.0070766670 0.11843571 118.62566 16.761270 6785.3834 49670192. -0.016156395 0.12419116 118.67276 16.638813 6787.7563 50043316. -0.049122534 0.12994661 118.71932 16.517765 6790.1293 49098874. -0.028640649 0.13570205 118.76588 16.400305 6792.5022 45377313. 0.021944047 0.14145750 118.81244 16.283913