# # 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 = 44.168675 km # Date (UTC) = 2017-01-19T10:16:18.632 # Date (julian) = 2457772.92799342 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6505.9163 6.5531678e+10 0.074942845 0.034067245 100.17289 41.469362 6508.6016 5.7639059e+10 0.087251945 0.034877006 100.27525 41.300761 6511.2870 5.0736375e+10 0.099822691 0.035686768 100.37762 41.132161 6513.9723 4.4675331e+10 0.11269558 0.036496529 100.47998 40.963563 6516.6577 3.9349585e+10 0.12589840 0.037306291 100.58234 40.794964 6519.3430 3.4683835e+10 0.13944653 0.038116052 100.68471 40.626364 6522.0284 3.0592018e+10 0.15328343 0.038924687 100.78707 40.457764 6524.7138 2.7037851e+10 0.16051469 0.039680523 100.88944 40.293838 6527.3991 2.4066010e+10 0.16609581 0.041006225 100.99111 40.130568 6530.0845 2.1520376e+10 0.17092108 0.043946937 101.08745 39.961967 6532.7698 1.9190278e+10 0.17424625 0.047327290 101.18379 39.793367 6535.4552 1.7115984e+10 0.17539958 0.048026847 101.28013 39.624769 6538.1405 1.5247356e+10 0.17661085 0.049225107 101.37648 39.456170 6540.8259 1.3635410e+10 0.17661383 0.051244267 101.47282 39.287571 6543.5112 1.2235829e+10 0.17558150 0.051516068 101.56916 39.118970 6546.1966 1.0992811e+10 0.17370374 0.052626284 101.66550 38.950370 6548.8819 9.8938383e+09 0.17127308 0.053931023 101.76184 38.781772 6551.5673 8.9031985e+09 0.16760746 0.055434880 101.85330 38.613173 6554.2526 8.0189863e+09 0.16233841 0.054837682 101.94453 38.444574 6556.9380 7.2412519e+09 0.15729959 0.053875222 102.04087 38.275973 6559.6234 6.5643302e+09 0.15235254 0.052316822 102.13426 38.107373 6562.3087 5.9592167e+09 0.14834965 0.050586154 102.22458 37.938775 6564.9941 5.4203840e+09 0.14495657 0.048321087 102.31490 37.770176 6567.6794 4.9160948e+09 0.14202565 0.046042722 102.40523 37.601577 6570.3648 4.4604355e+09 0.13976309 0.044766408 102.49555 37.432976 6573.0501 4.0866503e+09 0.13719053 0.043617256 102.58014 37.275081 6575.7355 3.7807297e+09 0.13402713 0.041636789 102.65917 37.127560 6578.4208 3.5108000e+09 0.13064473 0.037985066 102.74508 36.970857 6581.1062 3.2537732e+09 0.12720751 0.035564453 102.83540 36.808279 6583.7915 2.9904890e+09 0.12441035 0.034621022 102.92001 36.639987 6586.4769 2.7498941e+09 0.12156924 0.033165131 103.00431 36.471389 6589.1623 2.5404512e+09 0.11872397 0.032724082 103.08861 36.302790 6591.8476 2.3363549e+09 0.11525047 0.028245484 103.17668 36.134190 6594.5330 2.1500114e+09 0.11171540 0.025879953 103.26700 35.965589 6597.2183 1.9693870e+09 0.10796639 0.025653835 103.35151 35.796991 6599.9037 1.8068468e+09 0.10584599 0.024984081 103.43258 35.634844 6602.5890 1.6785834e+09 0.10403654 0.027013984 103.50634 35.487323 6605.2744 1.5647780e+09 0.10192965 0.026895225 103.58440 35.333658 6607.9597 1.4652487e+09 0.098565762 0.023811884 103.66870 35.171080 6610.6451 1.3650866e+09 0.093616108 0.024619345 103.74850 35.004001 6613.3304 1.2627167e+09 0.091129890 0.023694830 103.82730 34.835399 6616.0158 1.1683480e+09 0.088891831 0.023284778 103.91160 34.666801 6618.7011 1.0796177e+09 0.088218368 0.024300247 103.99333 34.500766 6621.3865 9.9787036e+08 0.087729626 0.024961338 104.07161 34.338188 6624.0719 9.3329470e+08 0.086089944 0.024900775 104.14643 34.187131 6626.7572 8.7600281e+08 0.084666786 0.025626144 104.22020 34.039610 6629.4426 8.2184474e+08 0.083603125 0.026029087 104.29787 33.873813 6632.1279 7.7068095e+08 0.081994017 0.026047684 104.37615 33.706457 6634.8133 7.1911675e+08 0.080722213 0.026386167 104.45443 33.543879 6637.4986 6.6749407e+08 0.079442738 0.025917198 104.53271 33.378015 6640.1840 6.1687614e+08 0.079580295 0.025248141 104.61099 33.209414 6642.8693 5.7218691e+08 0.079721086 0.025187271 104.68061 33.059466 6645.5547 5.3711096e+08 0.078617370 0.025711537 104.74910 32.911944 6648.2400 5.0868944e+08 0.077409925 0.027124972 104.82131 32.749565 6650.9254 4.7896539e+08 0.076694961 0.026467088 104.89553 32.585024 6653.6108 4.4487437e+08 0.076199620 0.027837491 104.97380 32.416425 6656.2961 4.1393202e+08 0.074220924 0.028283311 105.05208 32.251832 6658.9815 3.8648186e+08 0.072293522 0.031801724 105.13027 32.089340 6661.6668 3.6526786e+08 0.070629898 0.032874574 105.19351 31.941801 6664.3522 3.4590410e+08 0.069129757 0.030917505 105.25770 31.792675 6667.0375 3.2820035e+08 0.068749533 0.027117242 105.32996 31.630098 6669.7229 3.1110991e+08 0.067541072 0.027613254 105.40490 31.464836 6672.4082 2.8856038e+08 0.067140229 0.027116220 105.48318 31.296236 6675.0936 2.6520181e+08 0.065424839 0.029977615 105.55673 31.132364 6677.7789 2.3202843e+08 0.063501720 0.031250868 105.62899 30.969037 6680.4643 2.0290122e+08 0.063990865 0.029541678 105.70124 30.800438 6683.1497 1.8539402e+08 0.064848543 0.031407898 105.76931 30.644053 6685.8350 1.7735332e+08 0.064322516 0.033586810 105.83253 30.501801 6688.5204 1.7604487e+08 0.061088444 0.033905307 105.89746 30.344648 6691.2057 1.7025187e+08 0.059359803 0.032952728 105.96370 30.176047 6693.8911 1.6106470e+08 0.058021822 0.031298397 106.03538 30.012896 6696.5764 1.5201560e+08 0.057557966 0.029915278 106.10763 29.850318 6699.2618 1.4813286e+08 0.055905354 0.031348886 106.17989 29.687741 6701.9471 1.4149059e+08 0.053656945 0.032799158 106.24864 29.521651 6704.6325 1.3762599e+08 0.053968642 0.036488137 106.31487 29.353052 6707.3178 1.3169484e+08 0.053503246 0.040141296 106.38666 29.190007 6710.0032 1.2474014e+08 0.052232690 0.040497120 106.45518 29.032751 6712.6885 1.1967000e+08 0.049606830 0.043108364 106.51313 28.890498 6715.3739 1.1403719e+08 0.047098320 0.047761006 106.57410 28.738659 6718.0593 1.1292229e+08 0.044665425 0.049904703 106.64034 28.570061 6720.7446 1.0796711e+08 0.043883021 0.050333490 106.70657 28.405695 6723.4300 1.0178321e+08 0.042514615 0.049608743 106.77280 28.243117 6726.1153 91166918. 0.037813362 0.040952408 106.83904 28.080539 6728.8007 83200034. 0.036909734 0.040762918 106.90527 27.917961 6731.4860 78329034. 0.034859055 0.042717312 106.97151 27.755383 6734.1714 74727942. 0.033831874 0.049343288 107.03774 27.588465 6736.8567 68391515. 0.035919721 0.053593952 107.10398 27.420227 6739.5421 61760208. 0.036369109 0.063489969 107.17022 27.257649 6742.2274 55400588. 0.033347185 0.069164965 107.23645 27.095071 6744.9128 49357607. 0.027872274 0.078499440 107.30269 26.932493 6747.5982 47704338. 0.022592703 0.067155240 107.36892 26.769916 6750.2835 45721010. 0.018045322 0.072488234 107.43469 26.607339 6752.9689 44373448. 0.010193743 0.073013321 107.49490 26.444761 6755.6542 44458354. -0.021993185 0.074318513 107.55763 26.282183 6758.3396 45564740. 0.0030162930 0.074423392 107.62386 26.119604 6761.0249 47649433. 0.054788240 0.077970284 107.68554 25.957025