# # 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 = 42.031840 km # Date (UTC) = 2017-01-14T09:37:50.583 # Date (julian) = 2457767.90127989 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6506.7724 6.4098883e+10 0.082885488 0.034325396 110.75220 37.836147 6508.8704 5.8213505e+10 0.093245173 0.034958048 110.82207 37.715879 6510.9684 5.2495714e+10 0.10370010 0.035590700 110.89734 37.588860 6513.0664 4.6731494e+10 0.11419504 0.036223353 110.96855 37.465375 6515.1644 4.1876833e+10 0.12494016 0.036856005 111.03029 37.350119 6517.2625 3.8023174e+10 0.13600390 0.037488657 111.09204 37.234864 6519.3605 3.4817169e+10 0.14733935 0.038121310 111.15737 37.119607 6521.4585 3.1865831e+10 0.15884607 0.038753962 111.22323 37.004351 6523.5565 2.8843730e+10 0.16592245 0.039317044 111.29117 36.881821 6525.6545 2.5934862e+10 0.17095059 0.039707514 111.36174 36.750098 6527.7526 2.3144572e+10 0.17579661 0.041262837 111.43082 36.624880 6529.8506 2.0691096e+10 0.17954577 0.043590679 111.49667 36.513740 6531.9486 1.8648525e+10 0.18215677 0.046609373 111.56253 36.402600 6534.0466 1.6978346e+10 0.18275312 0.047957598 111.62474 36.287811 6536.1446 1.5518165e+10 0.18185394 0.047919912 111.68649 36.172556 6538.2427 1.4118478e+10 0.18197852 0.049274842 111.75227 36.049771 6540.3407 1.2730038e+10 0.18059540 0.051015047 111.82283 35.918048 6542.4387 1.1397753e+10 0.17715981 0.051168792 111.89048 35.793150 6544.5367 1.0273306e+10 0.17374720 0.052079743 111.95222 35.682010 6546.6347 9.3537672e+09 0.17013776 0.052986813 112.01396 35.570871 6548.7328 8.6258945e+09 0.16684449 0.053886472 112.07571 35.456001 6550.8308 7.9506591e+09 0.16433885 0.055193379 112.13747 35.340727 6552.9288 7.2947774e+09 0.16224800 0.055352989 112.20116 35.217670 6555.0268 6.6440971e+09 0.15981180 0.054830832 112.26702 35.085946 6557.1248 6.0288071e+09 0.15697516 0.053787859 112.33146 34.961376 6559.2229 5.4974166e+09 0.15370658 0.052362027 112.39320 34.850237 6561.3209 5.0549414e+09 0.15041674 0.051214559 112.45494 34.739097 6563.4189 4.6990630e+09 0.14721599 0.049443799 112.51291 34.624179 6565.5169 4.3782084e+09 0.14419284 0.047731430 112.57054 34.508923 6567.6149 4.0604003e+09 0.14166131 0.046097242 112.63219 34.387918 6569.7130 3.7189390e+09 0.13934237 0.044898827 112.69805 34.260898 6571.8110 3.3810280e+09 0.13707437 0.044281781 112.76092 34.138151 6573.9090 3.0894768e+09 0.13407507 0.042928033 112.81855 34.022896 6576.0070 2.8546009e+09 0.13117271 0.041363316 112.87618 33.907641 6578.1050 2.6632039e+09 0.12805783 0.038483748 112.93381 33.792384 6580.2031 2.4899294e+09 0.12473475 0.036333098 112.99143 33.677127 6582.3011 2.3268302e+09 0.12155736 0.035211863 113.04906 33.563946 6584.3991 2.1961824e+09 0.11824533 0.034298107 113.10669 33.452807 6586.4971 2.0649208e+09 0.11504916 0.033164870 113.16494 33.340124 6588.5951 1.9264770e+09 0.11212161 0.033181183 113.23080 33.208401 6590.6932 1.7842001e+09 0.10886602 0.029772685 113.29666 33.076677 6592.7912 1.6490942e+09 0.10617497 0.027305051 113.35080 32.964494 6594.8892 1.5359345e+09 0.10370041 0.025684396 113.40431 32.853355 6596.9872 1.4418026e+09 0.10127875 0.025722785 113.45996 32.742215 6599.0852 1.3558944e+09 0.099600482 0.024934857 113.51759 32.631075 6601.1833 1.2770604e+09 0.099696514 0.027131994 113.57484 32.519563 6603.2813 1.2119253e+09 0.098629418 0.026496758 113.62836 32.404308 6605.3793 1.1436924e+09 0.098078859 0.026983244 113.68187 32.289052 6607.4773 1.0758504e+09 0.096551066 0.024764472 113.74354 32.166019 6609.5753 1.0077412e+09 0.093744204 0.023876834 113.80940 32.038999 6611.6734 9.3818840e+08 0.091382642 0.024529052 113.86865 31.918279 6613.7714 8.7779067e+08 0.090550196 0.023856611 113.92217 31.803024 6615.8694 8.2372111e+08 0.089175434 0.023278281 113.97568 31.688204 6617.9674 7.7673896e+08 0.088598782 0.023759994 114.02920 31.577048 6620.0654 7.3734382e+08 0.087918134 0.024788285 114.08272 31.465892 6622.1635 6.9955932e+08 0.086641410 0.024714485 114.13623 31.354747 6624.2615 6.6372816e+08 0.084848380 0.025002278 114.18975 31.243607 6626.3595 6.2507317e+08 0.083496142 0.026132870 114.24399 31.127368 6628.4575 5.8744311e+08 0.082053479 0.025888852 114.30044 30.995644 6630.5555 5.5363609e+08 0.080524463 0.025929671 114.35653 30.866433 6632.6536 5.1691967e+08 0.079119437 0.026110712 114.41004 30.755294 6634.7516 4.9023794e+08 0.077636278 0.026381666 114.46356 30.644155 6636.8496 4.6226137e+08 0.076140954 0.026219819 114.51707 30.533016 6638.9476 4.3798384e+08 0.075138596 0.025630357 114.57058 30.421876 6641.0456 4.1867333e+08 0.075972024 0.025148455 114.62487 30.305317 6643.1437 3.9017704e+08 0.075920612 0.025214309 114.68132 30.173592 6645.2417 3.6564530e+08 0.075368908 0.025564902 114.73680 30.044701 6647.3397 3.4410415e+08 0.074649047 0.026616633 114.78620 29.933562 6649.4377 3.2763484e+08 0.073975531 0.027030314 114.83559 29.822423 6651.5357 3.1876500e+08 0.073760834 0.026894731 114.88790 29.711284 6653.6338 3.0880504e+08 0.073422208 0.027849236 114.94141 29.600145 6655.7318 2.9628141e+08 0.072057519 0.027912588 114.99378 29.489005 6657.8298 2.7705890e+08 0.070852543 0.029863651 115.04317 29.377866 6659.9278 2.5702738e+08 0.069749574 0.031641054 115.09257 29.266726 6662.0258 2.3773087e+08 0.068564838 0.033029774 115.14796 29.142096 6664.1239 2.2027439e+08 0.067576871 0.031752895 115.20441 29.015076 6666.2219 2.0608357e+08 0.067850072 0.026951831 115.25575 28.896572 6668.3199 1.9410315e+08 0.067158287 0.027753862 115.30515 28.781316 6670.4179 1.8517822e+08 0.066944038 0.027135018 115.35454 28.667273 6672.5159 1.7774817e+08 0.066725340 0.027178647 115.40394 28.556134 6674.6140 1.7261513e+08 0.065579334 0.029472705 115.45334 28.444994 6676.7120 1.6406368e+08 0.063479518 0.032172590 115.50884 28.320117 6678.8100 1.5495446e+08 0.062833415 0.030394852 115.56529 28.193098 6680.9080 1.4527761e+08 0.063832521 0.029637496 115.61348 28.077820 6683.0060 1.3342061e+08 0.064597853 0.031197431 115.65876 27.966681 6685.1041 1.2712421e+08 0.064520376 0.032814749 115.70750 27.850618 6687.2021 1.1855948e+08 0.062981268 0.034230199 115.76396 27.723599 6689.3001 1.1045734e+08 0.060740560 0.033745887 115.81911 27.599504 6691.3981 1.0785935e+08 0.060064639 0.032907333 115.86851 27.488348 6693.4961 1.0490824e+08 0.059424213 0.031433882 115.91791 27.377192 6695.5942 1.0533483e+08 0.059282043 0.029750334 115.96420 27.266048 6697.6922 1.0436528e+08 0.058785534 0.030178862 116.00948 27.154909 6699.7902 99665517. 0.057560885 0.030861305 116.05687 27.038593 6701.8882 93966962. 0.056097730 0.032712715 116.10862 26.911573 6703.9862 89602209. 0.056607732 0.036143119 116.15990 26.787735 6706.0843 85740772. 0.056827641 0.038593050 116.20929 26.676597 6708.1823 82675729. 0.056672909 0.040242073 116.25868 26.565458 6710.2803 79134401. 0.055624209 0.040551360 116.30989 26.442075 6712.3783 74420018. 0.053817025 0.042532371 116.36164 26.315055 6714.4763 70358406. 0.052031127 0.047339220 116.40922 26.198283 6716.5744 65915741. 0.050452260 0.049247338 116.45449 26.087143 6718.6724 63665765. 0.048424240 0.050859593 116.50117 25.972575 6720.7704 60600503. 0.048648357 0.050330502 116.55292 25.845556 6722.8684 59582719. 0.048038399 0.049531612 116.60408 25.720341 6724.9664 56201110. 0.044149844 0.041856276 116.64936 25.613318 6727.0645 51333602. 0.042717119 0.040874508 116.69464 25.506295 6729.1625 47982495. 0.042523101 0.040937131 116.74420 25.386057 6731.2605 45324227. 0.040908976 0.042268466 116.79595 25.259039 6733.3585 45810537. 0.039864475 0.045870811 116.84423 25.140518 6735.4565 44189564. 0.040130756 0.049778082 116.88951 25.029378 6737.5546 42936375. 0.038482270 0.055902127 116.93498 24.916557 6739.6526 43577558. 0.041193671 0.063625184 116.98202 24.789538 6741.7506 44738040. 0.044669216 0.067899444 117.02907 24.662519