# # 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 = 42.920521 km # Date (UTC) = 2016-12-31T10:09:03.345 # Date (julian) = 2457753.92295539 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6510.6229 4.9343936e+10 0.10427769 0.035486506 104.44573 30.548542 6512.8866 4.4844914e+10 0.11556322 0.036169114 104.50100 30.438790 6515.1502 4.0511501e+10 0.12694530 0.036851723 104.55626 30.332201 6517.4139 3.6759558e+10 0.13852905 0.037534331 104.61153 30.225612 6519.6776 3.3311852e+10 0.15026331 0.038216939 104.66680 30.119022 6521.9413 3.0195644e+10 0.16216205 0.038899547 104.72207 30.012433 6524.2050 2.7020622e+10 0.16787589 0.039499778 104.77767 29.904071 6526.4687 2.3992064e+10 0.17242500 0.040159418 104.83541 29.784137 6528.7323 2.1330392e+10 0.17612283 0.042023450 104.89316 29.664204 6530.9960 1.9006490e+10 0.17852555 0.045223114 104.94872 29.556034 6533.2597 1.7141632e+10 0.18142925 0.047629956 105.00399 29.449444 6535.5234 1.5456003e+10 0.18130727 0.047997251 105.05926 29.341478 6537.7871 1.3935193e+10 0.18148380 0.049056298 105.11453 29.230942 6540.0508 1.2573501e+10 0.18114129 0.050878083 105.16980 29.120405 6542.3144 1.1400942e+10 0.17847807 0.051121619 105.22185 29.013086 6544.5781 1.0464589e+10 0.17603064 0.052113339 105.27317 28.906496 6546.8418 9.6301548e+09 0.17292530 0.053157204 105.32630 28.796144 6549.1055 8.8144533e+09 0.16874962 0.054073793 105.38404 28.676229 6551.3692 8.0271121e+09 0.16507987 0.055365340 105.44158 28.556723 6553.6329 7.2934557e+09 0.16131955 0.055016932 105.49291 28.450119 6555.8966 6.6658595e+09 0.15770149 0.054100046 105.54423 28.343516 6558.1602 6.1458836e+09 0.15507146 0.053102763 105.59752 28.236920 6560.4239 5.6654575e+09 0.15173861 0.051892089 105.65279 28.130330 6562.6876 5.2385776e+09 0.14847728 0.050225621 105.70806 28.023740 6564.9513 4.8641532e+09 0.14550809 0.048340473 105.75952 27.917150 6567.2150 4.5368903e+09 0.14269714 0.046435421 105.81084 27.810560 6569.4787 4.2314913e+09 0.14021288 0.044883578 105.86301 27.698216 6571.7423 3.9262345e+09 0.13806503 0.044300527 105.91631 27.578301 6574.0060 3.6308799e+09 0.13512609 0.042852111 105.96925 27.460785 6576.2697 3.3536486e+09 0.13250614 0.041060950 106.02058 27.354180 6578.5334 3.1108130e+09 0.12938835 0.037807320 106.07190 27.247576 6580.7971 2.8976970e+09 0.12626751 0.035784136 106.12323 27.140982 6583.0608 2.7060376e+09 0.12365016 0.034990910 106.17455 27.034393 6585.3244 2.5310194e+09 0.12074413 0.033711384 106.22587 26.927804 6587.5881 2.3745978e+09 0.11801153 0.033288677 106.27719 26.821214 6589.8518 2.2301759e+09 0.11499125 0.031356049 106.32851 26.714624 6592.1155 2.0824971e+09 0.11148923 0.027961339 106.38098 26.602870 6594.3792 1.9304110e+09 0.10815420 0.025964369 106.43428 26.487396 6596.6429 1.7838457e+09 0.10454760 0.025724351 106.48692 26.374851 6598.9066 1.6444870e+09 0.10161956 0.024974344 106.53824 26.268261 6601.1702 1.5338035e+09 0.10071782 0.027125863 106.58956 26.161671 6603.4339 1.4486734e+09 0.098928871 0.026406392 106.63775 26.055071 6605.6976 1.3684534e+09 0.098184981 0.027250281 106.68513 25.948468 6607.9613 1.2961545e+09 0.096268752 0.023808805 106.73407 25.838351 6610.2250 1.2133196e+09 0.093438448 0.024217939 106.78736 25.718435 6612.4887 1.1241425e+09 0.091810383 0.023955643 106.84058 25.598733 6614.7523 1.0481224e+09 0.091027514 0.023422156 106.88796 25.496091 6617.0160 9.8169414e+08 0.089895082 0.023444564 106.93533 25.393449 6619.2797 9.2712497e+08 0.089436959 0.024593405 106.98270 25.288915 6621.5434 8.7846282e+08 0.088637891 0.024909335 107.03008 25.182325 6623.8071 8.2588247e+08 0.086980445 0.024790837 107.07745 25.075735 6626.0708 7.7787170e+08 0.085920817 0.026500741 107.13043 24.956537 6628.3345 7.2781290e+08 0.084381516 0.025838885 107.18372 24.836622 6630.5981 6.7786281e+08 0.082960858 0.025929776 107.23291 24.728696 6632.8618 6.3302283e+08 0.081636600 0.026135684 107.28029 24.626041 6635.1255 5.9098322e+08 0.080262588 0.026418609 107.32767 24.522749 6637.3892 5.6026308e+08 0.078820915 0.025970799 107.37504 24.416160 6639.6529 5.3019095e+08 0.078294810 0.025394723 107.42242 24.309570 6641.9166 5.0134849e+08 0.078559862 0.025151413 107.47351 24.194601 6644.1802 4.6874208e+08 0.077530904 0.025363086 107.52681 24.074685 6646.4439 4.3720353e+08 0.076476094 0.026149938 107.57787 23.961285 6648.7076 4.1166479e+08 0.075210600 0.027437961 107.62524 23.858643 6650.9713 3.8697244e+08 0.074701772 0.026477594 107.67261 23.756001 6653.2350 3.6575411e+08 0.074347436 0.027645633 107.72124 23.638778 6655.4987 3.4175346e+08 0.073090210 0.027816265 107.77009 23.518863 6657.7623 3.1710505e+08 0.071821452 0.029785410 107.81807 23.409174 6660.0260 2.9807918e+08 0.070738459 0.031649659 107.86546 23.306519 6662.2897 2.8211836e+08 0.069550729 0.032881724 107.91292 23.202832 6664.5534 2.7023647e+08 0.068810737 0.030181220 107.96177 23.082917 6666.8171 2.5778160e+08 0.068867190 0.027067814 108.01063 22.963001 6669.0808 2.4207589e+08 0.067932547 0.028272748 108.05509 22.857046 6671.3445 2.2810091e+08 0.068295317 0.026870257 108.09852 22.754405 6673.6081 2.1845336e+08 0.067865945 0.028368732 108.14466 22.648233 6675.8718 2.1237741e+08 0.065796319 0.031468216 108.19796 22.532759 6678.1355 1.9992385e+08 0.064880893 0.030845981 108.25102 22.417494 6680.3992 1.8729529e+08 0.065473635 0.029527618 108.29445 22.310904 6682.6629 1.7823596e+08 0.066329214 0.030931004 108.33787 22.204314 6684.9266 1.7215844e+08 0.066367257 0.032701111 108.38396 22.093367 6687.1902 1.6380283e+08 0.064693416 0.034236799 108.43282 21.977893 6689.4539 1.5062683e+08 0.062318152 0.033607417 108.48167 21.862414 6691.7176 1.3887030e+08 0.061495759 0.032831954 108.53053 21.746923 6693.9813 1.3023294e+08 0.060618736 0.031267443 108.57939 21.631442 6696.2450 1.2842314e+08 0.060502923 0.029777570 108.62289 21.524732 6698.5087 1.2478507e+08 0.059496161 0.030916018 108.66631 21.418143 6700.7723 1.2239167e+08 0.057700750 0.031240591 108.71221 21.307516 6703.0360 1.1798174e+08 0.057365744 0.033765402 108.76106 21.192042 6705.2997 1.1033600e+08 0.057711766 0.037201444 108.80992 21.076568 6707.5634 1.0369711e+08 0.057621041 0.040106120 108.85877 20.961094 6709.8271 96362657. 0.056926960 0.040606476 108.90763 20.845620 6712.0908 91918275. 0.055000834 0.041998490 108.95131 20.742353 6714.3545 84688578. 0.053162724 0.047330056 108.99474 20.639711 6716.6181 80240465. 0.051490740 0.049311823 109.04043 20.529844 6718.8818 79002747. 0.049231630 0.051185788 109.08929 20.409928 6721.1455 76070473. 0.049794808 0.050347741 109.13740 20.290750 6723.4092 73379433. 0.048629282 0.049597158 109.18182 20.175259 6725.6729 67745767. 0.044757580 0.041155706 109.22625 20.059768 6727.9366 59108135. 0.044248468 0.039712618 109.27472 19.944293 6730.2002 51878569. 0.043308248 0.040653463 109.32357 19.828820 6732.4639 52069536. 0.041941303 0.043825617 109.36620 19.721864 6734.7276 50337464. 0.041928851 0.049309821 109.40568 19.619222 6736.9913 55252254. 0.043720208 0.054102668 109.44639 19.514902 6739.2550 56407632. 0.044484803 0.063138602 109.49524 19.399428 6741.5187 52376762. 0.043183176 0.067237960 109.54410 19.283954 6743.7824 50550764. 0.038953918 0.076325160 109.58905 19.168480 6746.0460 43243968. 0.037802008 0.078452063 109.63346 19.053006 6748.3097 40245767. 0.035063895 0.068646347 109.68066 18.937532 6750.5734 42208411. 0.031279632 0.072983242 109.72952 18.822058 6752.8371 46779725. 0.026779358 0.073165809 109.77670 18.706584