# # 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 = 41.844461 km # Date (UTC) = 2016-12-25T10:22:10.023 # Date (julian) = 2457747.93206045 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6503.0830 8.1887597e+10 0.062727605 0.033212869 101.20683 28.860438 6505.1353 7.2034809e+10 0.072245629 0.033831738 101.25336 28.763801 6507.1876 6.3386963e+10 0.081938211 0.034450607 101.30296 28.667153 6509.2399 5.6111460e+10 0.091872835 0.035069476 101.35307 28.570504 6511.2922 5.0115708e+10 0.10211181 0.035688345 101.40296 28.473627 6513.3445 4.5153687e+10 0.11269363 0.036307215 101.44949 28.373412 6515.3968 4.0846239e+10 0.12356381 0.036926084 101.49602 28.273197 6517.4491 3.6882351e+10 0.13464340 0.037544953 101.54351 28.173946 6519.5015 3.3348884e+10 0.14595496 0.038163822 101.59362 28.077309 6521.5538 3.0121438e+10 0.15744887 0.038782691 101.64372 27.980672 6523.6061 2.7361394e+10 0.16452379 0.039329328 101.69213 27.884035 6525.6584 2.4962005e+10 0.16992143 0.039707074 101.73866 27.787398 6527.7107 2.2769220e+10 0.17521466 0.041232449 101.78519 27.690761 6529.7630 2.0787634e+10 0.17918970 0.043451196 101.83172 27.594115 6531.8153 1.8955102e+10 0.18194680 0.046415392 101.87826 27.497466 6533.8676 1.7271042e+10 0.18294966 0.047888306 101.92479 27.400816 6535.9199 1.5768176e+10 0.18195484 0.047825228 101.97132 27.304178 6537.9723 1.4406349e+10 0.18199304 0.049143602 102.01785 27.207542 6540.0246 1.3223762e+10 0.18067046 0.050865709 102.06438 27.110906 6542.0769 1.2156521e+10 0.17719687 0.051031426 102.11091 27.014269 6544.1292 1.1205758e+10 0.17419114 0.051749151 102.15744 26.917632 6546.1815 1.0370095e+10 0.17152121 0.052613874 102.20397 26.820995 6548.2338 9.5831012e+09 0.16963388 0.053737471 102.25050 26.724358 6550.2861 8.8817914e+09 0.16767017 0.055057003 102.29702 26.627721 6552.3384 8.2237791e+09 0.16555245 0.055501582 102.34355 26.531078 6554.3907 7.6124839e+09 0.16289919 0.054840580 102.39009 26.434428 6556.4431 7.0836527e+09 0.16028258 0.053947988 102.43662 26.337778 6558.4954 6.5919616e+09 0.15766074 0.052817187 102.48315 26.241138 6560.5477 6.1649419e+09 0.15464008 0.051780503 102.52968 26.144502 6562.6000 5.7809313e+09 0.15168110 0.050308987 102.57621 26.047866 6564.6523 5.4176067e+09 0.14863806 0.048475973 102.61945 25.951229 6566.7046 5.0901282e+09 0.14586811 0.046784285 102.66240 25.854592 6568.7569 4.7755998e+09 0.14327564 0.045075866 102.70580 25.757955 6570.8092 4.4918369e+09 0.14106993 0.044582295 102.75233 25.661318 6572.8616 4.2230328e+09 0.13860404 0.043736768 102.79886 25.564681 6574.9139 3.9668104e+09 0.13571171 0.042416080 102.84421 25.469224 6576.9662 3.7306653e+09 0.13244916 0.040259308 102.88716 25.376154 6579.0185 3.5164289e+09 0.12858405 0.037060336 102.93011 25.283084 6581.0708 3.3068607e+09 0.12530830 0.035575171 102.97811 25.181609 6583.1231 3.0853591e+09 0.12249936 0.034959355 103.03046 25.072891 6585.1754 2.8634839e+09 0.11959599 0.033830530 103.08230 24.964820 6587.2277 2.6692927e+09 0.11699175 0.033208826 103.12525 24.868184 6589.2800 2.5027031e+09 0.11466719 0.032490402 103.16820 24.771548 6591.3324 2.3500409e+09 0.11226954 0.028826889 103.21115 24.674911 6593.3847 2.2072847e+09 0.11028370 0.026744600 103.25410 24.578274 6595.4370 2.0722275e+09 0.10793050 0.025668887 103.29705 24.481638 6597.4893 1.9604293e+09 0.10577111 0.025568327 103.34000 24.386662 6599.5416 1.8575239e+09 0.10447999 0.024962305 103.38296 24.293591 6601.5939 1.7570174e+09 0.10418036 0.027325387 103.42592 24.200521 6603.6462 1.6626961e+09 0.10282761 0.026280713 103.46887 24.105054 6605.6985 1.5704861e+09 0.10235076 0.027251055 103.51181 24.008417 6607.7508 1.4851769e+09 0.10044377 0.024224363 103.55476 23.911780 6609.8032 1.4075728e+09 0.097519392 0.023944506 103.59771 23.815143 6611.8555 1.3306105e+09 0.095051265 0.024412922 103.64066 23.718506 6613.9078 1.2624237e+09 0.093997240 0.023906656 103.68361 23.622171 6615.9601 1.1967444e+09 0.092397323 0.023281071 103.72656 23.529114 6618.0124 1.1340006e+09 0.091712259 0.023780159 103.76951 23.436057 6620.0647 1.0778518e+09 0.090883920 0.024788051 103.81247 23.341957 6622.1170 1.0276618e+09 0.089453617 0.024726845 103.85542 23.245308 6624.1693 9.8523270e+08 0.087421962 0.024952953 103.89837 23.148658 6626.2216 9.3948871e+08 0.085997472 0.026308508 103.94199 23.046015 6628.2740 8.8529687e+08 0.084324852 0.025814324 103.98629 22.937297 6630.3263 8.2736561e+08 0.082872382 0.025929106 104.03056 22.828800 6632.3786 7.7479212e+08 0.081426985 0.026077740 104.07351 22.735726 6634.4309 7.3106464e+08 0.080263969 0.026358274 104.11646 22.642668 6636.4832 6.9621014e+08 0.079165743 0.026362106 104.15863 22.548826 6638.5355 6.6693586e+08 0.078489496 0.025648311 104.19800 22.452189 6640.5878 6.3243990e+08 0.079158512 0.025198731 104.23737 22.355552 6642.6401 6.0543036e+08 0.079233645 0.025177892 104.27826 22.260437 6644.6924 5.7084307e+08 0.078596201 0.025418445 104.32121 22.167380 6646.7448 5.4405100e+08 0.077751788 0.026305658 104.36416 22.074323 6648.7971 5.2165509e+08 0.076821836 0.027497845 104.40485 21.981258 6650.8494 5.0170131e+08 0.076576381 0.026449684 104.44423 21.888188 6652.9017 4.8729133e+08 0.076293895 0.027498613 104.48360 21.795118 6654.9540 4.6359485e+08 0.075320052 0.027629811 104.53047 21.688941 6657.0063 4.3919290e+08 0.073604559 0.028908436 104.57879 21.580223 6659.0586 4.0864312e+08 0.072320208 0.031822369 104.62394 21.477050 6661.1109 3.8515989e+08 0.071210019 0.032591452 104.66331 21.383992 6663.1632 3.6456416e+08 0.070166476 0.032437973 104.70268 21.290934 6665.2156 3.4067256e+08 0.069811890 0.028193928 104.74205 21.197876 6667.2679 3.2129415e+08 0.069408359 0.027201851 104.78142 21.104819 6669.3202 3.0333048e+08 0.068424720 0.028026853 104.82080 21.011761 6671.3725 2.8880290e+08 0.068437147 0.026870657 104.86394 20.906705 6673.4248 2.7151038e+08 0.067938969 0.028094545 104.90823 20.797987 6675.4771 2.5790606e+08 0.066131992 0.030712210 104.95113 20.693692 6677.5294 2.4777073e+08 0.064619145 0.031605581 104.99051 20.600622 6679.5817 2.4061981e+08 0.064507063 0.029787048 105.02988 20.507552 6681.6341 2.3495747e+08 0.065432271 0.030143792 105.07167 20.408799 6683.6864 2.2047306e+08 0.065923992 0.032194451 105.11596 20.304108 6685.7387 2.0682814e+08 0.065662821 0.033485058 105.16020 20.199531 6687.7910 1.9714043e+08 0.063603448 0.033901760 105.19959 20.106424 6689.8433 1.8762921e+08 0.061653286 0.033256923 105.23896 20.013366 6691.8956 1.8340823e+08 0.060672845 0.032789959 105.27937 19.916994 6693.9479 1.7484422e+08 0.059793481 0.031278894 105.32366 19.808276 6696.0002 1.6399814e+08 0.059754133 0.029675881 105.36796 19.699558 6698.0525 1.5787715e+08 0.058983871 0.030289936 105.40866 19.602242 6700.1049 1.5097130e+08 0.057452738 0.030745490 105.44803 19.509185 6702.1572 1.4234835e+08 0.055994356 0.033002226 105.48741 19.416127 6704.2095 1.3373736e+08 0.056327247 0.036280416 105.52761 19.312202 6706.2618 1.2644174e+08 0.056252725 0.038902023 105.56788 19.207510 6708.3141 1.2324325e+08 0.055874465 0.040385619 105.60774 19.108056 6710.3664 1.2360752e+08 0.054618857 0.040568215 105.64712 19.014985 6712.4187 1.1976423e+08 0.052652469 0.042607382 105.68649 18.921915 6714.4710 1.1300603e+08 0.050685410 0.047338821 105.72910 18.821209 6716.5233 1.0714122e+08 0.048931932 0.049172196 105.77339 18.716517 6718.5757 97017119. 0.046750744 0.050708952 105.81621 18.613845 6720.6280 85846972. 0.046531210 0.050347006 105.85200 18.520788 6722.6803 80945052. 0.045993052 0.049764205 105.88780 18.427732 6724.7326 74578749. 0.042495856 0.043809081 105.92682 18.330258 6726.7849 77394785. 0.040638976 0.040958446 105.97111 18.225566 6728.8372 75784840. 0.040542450 0.040814702 106.01540 18.120875 6730.8895 71822205. 0.039035911 0.041598546 106.05608 18.016183 6732.9418 68409863. 0.038044512 0.043913597 106.09635 17.911491 6734.9941 61930928. 0.038115860 0.049293785 106.13477 17.811595 6737.0465 61035121. 0.039893060 0.054283552 106.17057 17.718525 6739.0988 57093756. 0.040503947 0.062947424 106.20637 17.625455 6741.1511 58518183. 0.039369430 0.066189576 106.24742 17.527683 6743.2034 56698840. 0.035539635 0.072419503 106.29171 17.427018 6745.2557 53450844. 0.032255046 0.078674381 106.33546 17.325808 6747.3080 50500564. 0.026657962 0.067255124 106.37573 17.221116 6749.3603 46017369. 0.022498306 0.072179276 106.41599 17.116425 6751.4126 45728128. 0.0021408917 0.073886135 106.45626 17.011733 6753.4649 46292765. 0.014958171 0.074481941 106.49652 16.907042 6755.5173 46553846. 0.042935520 0.074378561 106.53679 16.802350