# # 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 = 43.245154 km # Date (UTC) = 2016-12-12T10:00:50.714 # Date (julian) = 2457734.91725363 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6513.0898 5.3779905e+10 0.11840013 0.036230411 106.86034 25.679236 6515.4915 4.7729892e+10 0.13023960 0.036954644 106.91149 25.565259 6517.8933 4.2385827e+10 0.14222321 0.037678877 106.96594 25.447966 6520.2950 3.7516595e+10 0.15432422 0.038403110 107.02040 25.330672 6522.6967 3.3333039e+10 0.16468085 0.039099694 107.07140 25.216842 6525.0984 2.9632048e+10 0.17083219 0.039770981 107.12167 25.103753 6527.5002 2.6438705e+10 0.17483685 0.041079591 107.17376 24.990664 6529.9019 2.3554796e+10 0.17840086 0.043672398 107.22821 24.877574 6532.3036 2.0927186e+10 0.18063980 0.046937818 107.28245 24.764280 6534.7053 1.8610563e+10 0.18126899 0.048141864 107.33271 24.647002 6537.1070 1.6584342e+10 0.18090649 0.048735694 107.38298 24.529724 6539.5088 1.4853575e+10 0.18020502 0.050259478 107.43324 24.415206 6541.9105 1.3346842e+10 0.17828699 0.051031265 107.48351 24.302101 6544.3122 1.2027468e+10 0.17602674 0.051897619 107.53377 24.189001 6546.7139 1.0844321e+10 0.17363265 0.053051978 107.58404 24.075912 6549.1157 9.7990298e+09 0.17040458 0.054084142 107.63430 23.962824 6551.5174 8.8772001e+09 0.16722752 0.055417358 107.68456 23.849734 6553.9191 8.0656309e+09 0.16254601 0.054873048 107.73483 23.736645 6556.3208 7.3432694e+09 0.15780996 0.053965959 107.78509 23.623555 6558.7225 6.7045517e+09 0.15325976 0.052623609 107.83535 23.510466 6561.1243 6.1325990e+09 0.14892119 0.051311446 107.88561 23.397374 6563.5260 5.6254900e+09 0.14564727 0.049319921 107.93588 23.284270 6565.9277 5.1781193e+09 0.14245582 0.047264971 107.98615 23.171165 6568.3294 4.7647678e+09 0.14023561 0.045468836 108.03641 23.055037 6570.7312 4.3831388e+09 0.13806109 0.044614641 108.08668 22.937760 6573.1329 4.0310910e+09 0.13573395 0.043550852 108.13553 22.821894 6575.5346 3.7095516e+09 0.13299193 0.041838339 108.18160 22.708804 6577.9363 3.4339908e+09 0.13003682 0.038749642 108.22768 22.595715 6580.3380 3.1863213e+09 0.12689518 0.036208354 108.27772 22.482625 6582.7398 2.9501930e+09 0.12420489 0.035092484 108.32798 22.369536 6585.1415 2.7397574e+09 0.12153269 0.033857659 108.37825 22.258792 6587.5432 2.5384048e+09 0.11895534 0.033278723 108.42852 22.149876 6589.9449 2.3585861e+09 0.11618603 0.031171324 108.47806 22.040231 6592.3467 2.1964757e+09 0.11278967 0.027736822 108.52413 21.927143 6594.7484 2.0408615e+09 0.10952339 0.025761702 108.57020 21.814054 6597.1501 1.9007683e+09 0.10599027 0.025675363 108.61957 21.700965 6599.5518 1.7729556e+09 0.10369180 0.024962919 108.66983 21.587875 6601.9535 1.6528653e+09 0.10252900 0.027494753 108.71842 21.474779 6604.3553 1.5441172e+09 0.10026700 0.026282219 108.76450 21.361675 6606.7570 1.4418758e+09 0.098518589 0.026143689 108.81058 21.248570 6609.1587 1.3452465e+09 0.094629657 0.023753074 108.85665 21.135481 6611.5604 1.2576153e+09 0.091459102 0.024601069 108.90273 21.022391 6613.9621 1.1779572e+09 0.090463904 0.023926605 108.94880 20.909302 6616.3639 1.1062604e+09 0.089312926 0.023339408 108.99487 20.796212 6618.7656 1.0418956e+09 0.088965648 0.024348909 109.04232 20.680883 6621.1673 9.7136273e+08 0.088518117 0.025033989 109.09415 20.558368 6623.5690 8.9837544e+08 0.087199353 0.024702645 109.14532 20.436941 6625.9708 8.3490616e+08 0.086292245 0.026556011 109.19139 20.323852 6628.3725 7.7505811e+08 0.084883861 0.025854326 109.23747 20.210762 6630.7742 7.3376723e+08 0.083414634 0.025930210 109.28355 20.097662 6633.1759 6.9363134e+08 0.082171557 0.026182968 109.32963 19.984558 6635.5776 6.5046117e+08 0.080783323 0.026486415 109.37570 19.872886 6637.9794 6.1204639e+08 0.079785288 0.025681747 109.42178 19.763985 6640.3811 5.7327839e+08 0.079966193 0.025224025 109.46785 19.655084 6642.7828 5.4102011e+08 0.079938834 0.025183731 109.51392 19.542190 6645.1845 5.1328646e+08 0.078938769 0.025538132 109.56000 19.429100 6647.5863 4.8498559e+08 0.077804348 0.026746447 109.60933 19.308011 6649.9880 4.5327656e+08 0.077097306 0.026271807 109.66116 19.180784 6652.3897 4.2825942e+08 0.076568789 0.027357743 109.71045 19.061681 6654.7914 3.9927220e+08 0.075630787 0.027699072 109.75653 18.952766 6657.1931 3.7599422e+08 0.073644544 0.029125153 109.80237 18.843614 6659.5949 3.5594104e+08 0.072069820 0.031710509 109.84425 18.730525 6661.9966 3.3764891e+08 0.070507199 0.033042534 109.88614 18.617436 6664.3983 3.1814127e+08 0.069460913 0.030748685 109.93468 18.498040 6666.8000 2.9462698e+08 0.069615630 0.027064492 109.98651 18.375524 6669.2018 2.7593091e+08 0.068772238 0.028148486 110.03290 18.258162 6671.6035 2.6001141e+08 0.069146807 0.026873948 110.07479 18.145073 6674.0052 2.5289475e+08 0.068513137 0.028959177 110.11734 18.032651 6676.4069 2.4359801e+08 0.066231693 0.031975982 110.16341 17.923751 6678.8086 2.2998311e+08 0.065457325 0.030395759 110.20949 17.814851 6681.2104 2.1633057e+08 0.066629498 0.029818747 110.25637 17.695442 6683.6121 2.0336954e+08 0.067202745 0.032085601 110.30349 17.572927 6686.0138 1.9220302e+08 0.066698141 0.033769118 110.34993 17.456524 6688.4155 1.8683006e+08 0.063682638 0.033881109 110.39601 17.343419 6690.8173 1.7593480e+08 0.061998246 0.033022206 110.44237 17.227844 6693.2190 1.6357473e+08 0.060913556 0.031528967 110.48949 17.105329 6695.6207 1.5314459e+08 0.060205969 0.029745459 110.53587 16.984723 6698.0224 1.4438479e+08 0.059100703 0.030248590 110.57776 16.875823 6700.4241 1.3882435e+08 0.056849750 0.030982316 110.61964 16.766922 6702.8259 1.2730247e+08 0.055544335 0.033536186 110.66902 16.647772 6705.2276 1.1526406e+08 0.055201303 0.037073206 110.72085 16.525257 6707.6293 1.0090087e+08 0.054115348 0.040096679 110.76641 16.408685 6710.0310 92345714. 0.052211611 0.040502568 110.80829 16.295595 6712.4328 90024133. 0.049232284 0.042633433 110.85145 16.180209 6714.8345 87651839. 0.046373278 0.047366144 110.89859 16.057676 6717.2362 84904169. 0.043490701 0.049859659 110.94508 15.936795 6719.6379 79292495. 0.040768902 0.050763771 110.98697 15.827894 6722.0396 75901413. 0.040196199 0.050556200 111.02885 15.718994 6724.4414 73988653. 0.036439682 0.046241014 111.07458 15.600103 6726.8431 72564019. 0.032832721 0.040958971 111.12170 15.477588 6729.2448 72917709. 0.031953801 0.040882259 111.16882 15.355073 6731.6465 68548140. 0.028898294 0.043036733 111.21594 15.232557 6734.0482 65972389. 0.026753018 0.049350697 111.26050 15.116705 6736.4500 62573181. 0.027326107 0.052056148 111.30238 15.007803 6738.8517 58952207. 0.026522725 0.062010053 111.34480 14.897514 6741.2534 58414112. 0.023610205 0.066481445 111.39192 14.774999 6743.6551 57777847. 0.016533425 0.075466976 111.43905 14.652483 6746.0569 56778989. 0.010161481 0.078326229 111.48156 14.529950 6748.4586 52186111. -0.0055752363 0.069429510 111.52397 14.407417 6750.8603 50364437. -0.070015253 0.073473133 111.57042 14.284899 6753.2620 45489288. -0.028618815 0.073825250 111.61754 14.162384 6755.6637 43432770. 0.093588182 0.074314335 111.66467 14.039868