# # 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 = 41.248602 km # Date (UTC) = 2016-12-13T10:48:11.609 # Date (julian) = 2457735.95013436 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6512.3739 6.2414490e+10 0.11550339 0.036014522 94.988693 25.856385 6514.7311 5.4367701e+10 0.12698561 0.036725328 95.038691 25.741948 6517.0883 4.7355034e+10 0.13856851 0.037436134 95.092141 25.630940 6519.4455 4.1544641e+10 0.15033511 0.038146939 95.145591 25.519932 6521.8027 3.6477062e+10 0.16224446 0.038857745 95.199034 25.408935 6524.1599 3.2075329e+10 0.16816564 0.039483751 95.252474 25.297943 6526.5171 2.8320092e+10 0.17276014 0.040210159 95.304690 25.185726 6528.8743 2.4939297e+10 0.17612604 0.042136027 95.354021 25.070623 6531.2314 2.2036878e+10 0.17868926 0.045565551 95.403353 24.955519 6533.5886 1.9513077e+10 0.18070765 0.047769742 95.452681 24.843972 6535.9458 1.7317507e+10 0.17969174 0.047813997 95.502009 24.732980 6538.3030 1.5424179e+10 0.18026835 0.049304241 95.553120 24.621980 6540.6602 1.3792522e+10 0.17916673 0.051166010 95.606570 24.510972 6543.0174 1.2343468e+10 0.17704025 0.051386466 95.659996 24.399965 6545.3746 1.1091594e+10 0.17466540 0.052458923 95.709347 24.288972 6547.7318 9.9932149e+09 0.17193622 0.053565659 95.758675 24.177979 6550.0890 9.0054170e+09 0.16891303 0.055007646 95.808005 24.066987 6552.4462 8.1285338e+09 0.16476726 0.055474458 95.857336 23.955994 6554.8034 7.3342287e+09 0.16021041 0.054849239 95.906667 23.845002 6557.1606 6.6123205e+09 0.15571124 0.053765448 95.955995 23.734009 6559.5178 5.9824524e+09 0.15145401 0.052328738 96.005323 23.623016 6561.8750 5.4409386e+09 0.14786317 0.050941510 96.054658 23.512013 6564.2322 4.9825532e+09 0.14423497 0.048666375 96.103996 23.401005 6566.5894 4.5844315e+09 0.14149946 0.046849479 96.153332 23.290001 6568.9466 4.2139327e+09 0.13888910 0.044901543 96.202663 23.179009 6571.3038 3.8669227e+09 0.13692537 0.044420312 96.251995 23.068016 6573.6610 3.5542590e+09 0.13430649 0.043127080 96.301323 22.957023 6576.0182 3.2716638e+09 0.13152271 0.041350502 96.350651 22.846031 6578.3753 3.0175243e+09 0.12858613 0.038056900 96.398315 22.735039 6580.7325 2.7891055e+09 0.12551000 0.035843780 96.443535 22.624046 6583.0897 2.5832207e+09 0.12298992 0.034976246 96.488754 22.513053 6585.4469 2.3979131e+09 0.12019756 0.033613462 96.537979 22.402046 6587.8041 2.2232606e+09 0.11777548 0.033336533 96.587317 22.291038 6590.1613 2.0673170e+09 0.11485444 0.030761986 96.634430 22.180038 6592.5185 1.9280470e+09 0.11151127 0.027569889 96.679649 22.069045 6594.8757 1.7962026e+09 0.10820981 0.025691800 96.725311 21.958053 6597.2329 1.6777001e+09 0.10462853 0.025649231 96.774639 21.847060 6599.5901 1.5621063e+09 0.10234083 0.024965222 96.823967 21.736068 6601.9473 1.4447378e+09 0.10115334 0.027491813 96.874338 21.615708 6604.3045 1.3297333e+09 0.098900175 0.026252073 96.925211 21.490839 6606.6617 1.2222808e+09 0.097443381 0.026314935 96.975293 21.373086 6609.0189 1.1290396e+09 0.093915008 0.023711540 97.024624 21.262093 6611.3761 1.0514130e+09 0.090970042 0.024718631 97.073626 21.151428 6613.7333 9.8179628e+08 0.090192729 0.023842629 97.118852 21.044532 6616.0905 9.1832854e+08 0.088941982 0.023296497 97.164077 20.937636 6618.4477 8.5822680e+08 0.088641674 0.024108833 97.209299 20.828086 6620.8049 8.0003784e+08 0.088172395 0.025026562 97.254518 20.717093 6623.1621 7.4789540e+08 0.086921967 0.024551863 97.299738 20.606100 6625.5192 6.9904991e+08 0.085771341 0.026017221 97.344957 20.495108 6627.8764 6.5799468e+08 0.084143943 0.025655366 97.390177 20.384116 6630.2336 6.1785482e+08 0.082890665 0.025928877 97.435396 20.273123 6632.5908 5.8135880e+08 0.081378679 0.026103191 97.480616 20.162130 6634.9480 5.4510280e+08 0.080066460 0.026395996 97.525837 20.052572 6637.3052 5.1016222e+08 0.078679350 0.026011924 97.571063 19.945676 6639.6624 4.7910647e+08 0.078250180 0.025391312 97.616288 19.838780 6642.0196 4.5185490e+08 0.078585425 0.025152499 97.666697 19.715386 6644.3768 4.2424283e+08 0.077568758 0.025384331 97.717570 19.590516 6646.7340 3.9490100e+08 0.076502419 0.026300090 97.764169 19.479238 6649.0912 3.6965655e+08 0.075263437 0.027507978 97.809386 19.372357 6651.4484 3.4560520e+08 0.074917702 0.026827792 97.854603 19.264147 6653.8056 3.2572020e+08 0.074274666 0.027936965 97.899822 19.153155 6656.1628 3.0730381e+08 0.072364632 0.028166290 97.945042 19.042163 6658.5200 2.8934652e+08 0.070739353 0.030983267 97.986608 18.934818 6660.8772 2.7775793e+08 0.069283552 0.032423304 98.027724 18.827922 6663.2344 2.6700450e+08 0.068145098 0.032418264 98.073310 18.712791 6665.5916 2.5128528e+08 0.068078117 0.027577837 98.124184 18.587922 6667.9488 2.3350118e+08 0.067846908 0.027451952 98.173383 18.468375 6670.3060 2.1643680e+08 0.067701800 0.027186890 98.218599 18.361493 6672.6631 2.0364322e+08 0.067767588 0.027263971 98.263815 18.254611 6675.0203 1.9433524e+08 0.066609645 0.029837318 98.305488 18.147729 6677.3775 1.8836509e+08 0.064800418 0.031821511 98.346598 18.040847 6679.7347 1.7760075e+08 0.065085676 0.029660623 98.391914 17.926218 6682.0919 1.6752863e+08 0.066303225 0.030494778 98.442786 17.801349 6684.4491 1.5693250e+08 0.066806776 0.032676883 98.491039 17.681305 6686.8063 1.4861423e+08 0.065722778 0.034230212 98.532153 17.574409 6689.1635 1.4832243e+08 0.062901585 0.033868838 98.573266 17.467513 6691.5207 1.4327587e+08 0.062111275 0.032878411 98.618672 17.349456 6693.8779 1.3657837e+08 0.061287995 0.031302914 98.664919 17.229212 6696.2351 1.2197268e+08 0.061514247 0.029773463 98.710474 17.115202 6698.5923 1.0648176e+08 0.060915327 0.031030805 98.755693 17.004209 6700.9495 93652664. 0.059509702 0.031371979 98.801161 16.890984 6703.3067 86185277. 0.059624468 0.034442649 98.847408 16.770740 6705.6639 78604290. 0.060169735 0.037848844 98.893248 16.651552 6708.0211 71321110. 0.060349214 0.040066523 98.934356 16.544670 6710.3783 71931273. 0.059006016 0.040570536 98.975464 16.437787 6712.7355 68678839. 0.057167112 0.043195464 99.019894 16.322267 6715.0927 71164046. 0.055108352 0.047473355 99.066141 16.202023 6717.4499 67241694. 0.053408174 0.049846443 99.111894 16.088242 6719.8070 61761280. 0.052477426 0.050603086 99.157119 15.981346 6722.1642 60972199. 0.052863147 0.050402159 99.202398 15.873758 6724.5214 55766580. 0.050330109 0.045572334 99.248648 15.753514 6726.8786 58555613. 0.047544669 0.040959292 99.294899 15.633270 6729.2358 60025245. 0.047248664 0.040888243 99.341146 15.513026 6731.5930 57078620. 0.045992691 0.042930247 99.387393 15.392781 6733.9502 53855779. 0.045653349 0.049083309 99.429902 15.282257 6736.3074 46204199. 0.049748313 0.051517192 99.471010 15.175375 6738.6646 43812706. 0.052271660 0.060980054 99.512270 15.064554 6741.0218 38150712. 0.057622539 0.065820869 99.553891 14.944309 6743.3790 38236572. 0.048702716 0.073604139 99.596125 14.824065 6752.8078 37598489. 0.024392984 0.073199728 99.781134 14.343054