# # 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 = 41.218437 km # Date (UTC) = 2016-12-18T09:47:49.051 # Date (julian) = 2457740.90820661 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6508.7724 6.4885034e+10 0.094025792 0.034928503 110.03582 26.832519 6510.9077 5.8387523e+10 0.10456116 0.035572405 110.08424 26.731960 6513.0431 5.2516625e+10 0.11522613 0.036216307 110.13265 26.631414 6515.1784 4.7320457e+10 0.12605682 0.036860209 110.18106 26.530869 6517.3137 4.2678622e+10 0.13705532 0.037504111 110.22948 26.430324 6519.4490 3.8653907e+10 0.14824965 0.038148013 110.27789 26.329778 6521.5844 3.5137142e+10 0.15962454 0.038791915 110.32630 26.229232 6523.7197 3.1931740e+10 0.16614705 0.039357484 110.37281 26.126785 6525.8550 2.8988498e+10 0.17064260 0.039684634 110.41749 26.022515 6527.9903 2.6290364e+10 0.17555744 0.041435467 110.46218 25.918245 6530.1257 2.3805475e+10 0.17916884 0.044004620 110.50995 25.817037 6532.2610 2.1514266e+10 0.18150670 0.046902219 110.55836 25.716478 6534.3963 1.9459598e+10 0.18208132 0.048055422 110.60678 25.615921 6536.5316 1.7592889e+10 0.18144072 0.048266173 110.65519 25.515376 6538.6670 1.5932047e+10 0.18103321 0.049481458 110.70360 25.414831 6540.8023 1.4464192e+10 0.17958053 0.051233126 110.75032 25.314285 6542.9376 1.3124286e+10 0.17714360 0.051358210 110.79501 25.213739 6545.0729 1.1930463e+10 0.17440143 0.052456220 110.83969 25.113193 6547.2083 1.0830754e+10 0.17080859 0.053366566 110.88724 25.012648 6549.3436 9.8193991e+09 0.16720339 0.054316433 110.93566 24.912102 6551.4789 8.9227707e+09 0.16440528 0.055403861 110.98338 24.812400 6553.6142 8.1639531e+09 0.16178402 0.055026292 111.02360 24.721899 6555.7496 7.5441674e+09 0.15905662 0.054223542 111.06382 24.631398 6557.8849 7.0182276e+09 0.15657836 0.053311448 111.10449 24.539887 6560.0202 6.5173970e+09 0.15365717 0.052256071 111.14918 24.439342 6562.1556 6.0143689e+09 0.15034055 0.050731887 111.19387 24.338797 6564.2909 5.5450591e+09 0.14703241 0.048639770 111.23856 24.238251 6566.4262 5.1338749e+09 0.14439885 0.046941780 111.28324 24.137705 6568.5615 4.7600169e+09 0.14209651 0.045255480 111.32793 24.037159 6570.6969 4.4250755e+09 0.14002870 0.044628846 111.37534 23.936604 6572.8322 4.1124776e+09 0.13774594 0.043753585 111.42376 23.836045 6574.9675 3.8211705e+09 0.13511604 0.042390312 111.47201 23.735654 6577.1028 3.5689147e+09 0.13201260 0.040058839 111.51669 23.638832 6579.2382 3.3226149e+09 0.12853464 0.036939568 111.56138 23.542010 6581.3735 3.0951407e+09 0.12556867 0.035483511 111.60472 23.443849 6583.5088 2.8862863e+09 0.12282107 0.034764126 111.64569 23.343303 6585.6441 2.6920972e+09 0.11991883 0.033455796 111.68665 23.242757 6587.7795 2.5201589e+09 0.11734605 0.033331070 111.73013 23.142212 6589.9148 2.3553236e+09 0.11433699 0.031231107 111.77481 23.041667 6592.0501 2.2053392e+09 0.11077210 0.028024844 111.81950 22.941122 6594.1854 2.0673857e+09 0.10745728 0.026070722 111.86420 22.840563 6596.3208 1.9404077e+09 0.10416028 0.025725815 111.90889 22.740004 6598.4561 1.8298900e+09 0.10204163 0.025189407 111.95358 22.639448 6600.5914 1.7245845e+09 0.10173906 0.026205737 111.99827 22.538903 6602.7268 1.6275233e+09 0.10104867 0.026896452 112.04295 22.438357 6604.8621 1.5360886e+09 0.10027831 0.026583150 112.08533 22.340114 6606.9974 1.4491936e+09 0.099262801 0.025711659 112.12630 22.243292 6609.1327 1.3721655e+09 0.096307695 0.023745359 112.16726 22.146471 6611.2681 1.2940396e+09 0.093647122 0.024787515 112.21691 22.034444 6613.4034 1.2126971e+09 0.092816072 0.023721593 112.26719 21.921329 6615.5387 1.1328785e+09 0.091583265 0.023268106 112.31238 21.815080 6617.6740 1.0611028e+09 0.090792147 0.023662724 112.35334 21.714534 6619.8094 9.9963516e+08 0.090191646 0.024721200 112.39430 21.613988 6621.9447 9.4080665e+08 0.089078857 0.024776326 112.43848 21.516637 6624.0800 8.8839566e+08 0.087210923 0.024905141 112.48317 21.419802 6626.2153 8.4183093e+08 0.085960442 0.026316540 112.52720 21.322315 6628.3507 7.9614206e+08 0.084356595 0.025845469 112.56816 21.221769 6630.4860 7.5754702e+08 0.082750239 0.025929499 112.60913 21.121224 6632.6213 7.1598685e+08 0.081184903 0.026106846 112.65009 21.022505 6634.7566 6.7729890e+08 0.079673334 0.026382036 112.69105 20.925683 6636.8920 6.4300626e+08 0.078054495 0.026203364 112.73202 20.828861 6639.0273 6.0498079e+08 0.076878658 0.025618318 112.77598 20.729041 6641.1626 5.7431523e+08 0.077446556 0.025148853 112.82067 20.628496 6643.2980 5.4555282e+08 0.076907659 0.025237605 112.86491 20.528395 6645.4333 5.2332531e+08 0.076039210 0.025654658 112.90588 20.431560 6647.5686 5.0423672e+08 0.075206560 0.026737152 112.94685 20.334726 6649.7039 4.7577794e+08 0.074652995 0.026663357 112.99004 20.230811 6651.8393 4.4748232e+08 0.074483096 0.027127333 113.03613 20.117695 6653.9746 4.1620051e+08 0.074189814 0.028023248 113.08196 20.005360 6656.1099 3.9301654e+08 0.072726574 0.028119883 113.12293 19.908539 6658.2452 3.7452402e+08 0.071542920 0.030496005 113.16389 19.811717 6660.3806 3.5482355e+08 0.070398455 0.031971908 113.20485 19.714895 6662.5159 3.3878685e+08 0.069267897 0.032754829 113.24582 19.618073 6664.6512 3.2235014e+08 0.068578642 0.029823331 113.28678 19.521251 6666.7865 3.0883821e+08 0.068505254 0.027061862 113.32775 19.421898 6668.9219 2.9851228e+08 0.067407002 0.028286558 113.36872 19.321339 6671.0572 2.8857618e+08 0.067579694 0.026866163 113.40969 19.220780 6673.1925 2.7605299e+08 0.067239114 0.027747140 113.45157 19.111918 6675.3278 2.5861597e+08 0.065620659 0.030426297 113.49347 19.002992 6677.4632 2.3697009e+08 0.064064117 0.031699775 113.53480 18.901393 6679.5985 2.2025028e+08 0.064004451 0.029773202 113.57576 18.804572 6681.7338 2.0768281e+08 0.064909845 0.030220335 113.61672 18.707751 6683.8691 1.9641345e+08 0.065221559 0.032462326 113.65769 18.610929 6686.0045 1.8371591e+08 0.064746408 0.033763687 113.69865 18.514107 6688.1398 1.6856739e+08 0.062328707 0.033817461 113.73983 18.414445 6690.2751 1.5504035e+08 0.060664850 0.033084334 113.78173 18.305519 6692.4105 1.4386765e+08 0.059834633 0.032288695 113.82362 18.196593 6694.5458 1.3393919e+08 0.059264459 0.030496089 113.86473 18.094759 6696.6811 1.2612364e+08 0.059082139 0.029958771 113.90570 17.994200 6698.8164 1.2442149e+08 0.058022189 0.031338463 113.94682 17.892280 6700.9518 1.2399717e+08 0.056321013 0.031373663 113.98871 17.783353 6703.0871 1.2010178e+08 0.056119842 0.033893146 114.03061 17.674427 6705.2224 1.1734745e+08 0.056305203 0.037064006 114.07178 17.574891 6707.3577 1.0823287e+08 0.055997452 0.040135581 114.11274 17.478069 6709.4931 1.0362153e+08 0.055225593 0.040818932 114.15379 17.380153 6711.6284 99419085. 0.053320428 0.041407166 114.19568 17.271227 6713.7637 93438445. 0.051218771 0.046448815 114.23758 17.162300 6715.8990 90412940. 0.049492696 0.048298101 114.27882 17.061889 6718.0344 84800158. 0.047394517 0.049865938 114.31978 16.965068 6720.1697 81114819. 0.046354518 0.050400104 114.36076 16.868024 6722.3050 75520336. 0.046057032 0.050228121 114.40265 16.759101 6724.4403 76122420. 0.043082603 0.046249493 114.44455 16.650175 6726.5757 73549994. 0.040110328 0.040956559 114.48351 16.548881 6728.7110 73032650. 0.039606055 0.040635817 114.52075 16.452046 6730.8463 74222828. 0.037894897 0.041539317 114.55799 16.355212 6732.9817 67638585. 0.036258848 0.043920927 114.59964 16.246936 6735.1170 64423602. 0.035974787 0.049417612 114.64154 16.138009 6737.2523 58028524. 0.036622436 0.054939282 114.68343 16.029082 6739.3876 47050746. 0.034789876 0.063300936 114.72533 15.920156 6741.5230 44218148. 0.030748887 0.067250190 114.76642 15.813957 6743.6583 43675962. 0.021534356 0.075488188 114.80366 15.720860 6745.7936 46029524. -0.0062344263 0.078900512 114.84090 15.627762 6747.9289 51156754. 0.014612913 0.067041365 114.88040 15.526956 6750.0643 46746869. 0.055903177 0.072113858 114.92230 15.418030