# # 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 = 42.480700 km # Date (UTC) = 2017-01-23T10:07:11.914 # Date (julian) = 2457776.92166567 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6509.7210 5.5318395e+10 0.098236728 0.035214542 101.49839 44.629306 6511.7570 4.9972443e+10 0.10833981 0.035828497 101.59403 44.482627 6513.7930 4.5438744e+10 0.11867776 0.036442452 101.67620 44.354797 6515.8290 4.1528471e+10 0.12923487 0.037056407 101.76032 44.224796 6517.8650 3.7975775e+10 0.13995453 0.037670362 101.86150 44.075684 6519.9010 3.4314457e+10 0.15071136 0.038284317 101.96150 43.926566 6521.9371 3.0687253e+10 0.16150089 0.038898272 102.05737 43.777427 6523.9731 2.7551953e+10 0.16668567 0.039420287 102.14850 43.635676 6526.0091 2.5126515e+10 0.17078577 0.039677620 102.23067 43.507846 6528.0451 2.3111470e+10 0.17585543 0.041478268 102.31416 43.376684 6530.0811 2.1320147e+10 0.17959419 0.043942268 102.40471 43.227542 6532.1171 1.9374429e+10 0.18195907 0.046782048 102.49674 43.078401 6534.1532 1.7413823e+10 0.18245008 0.047987400 102.59262 42.929262 6536.1892 1.5759183e+10 0.18166213 0.047959756 102.68116 42.786845 6538.2252 1.4440082e+10 0.18207163 0.049266334 102.75877 42.654448 6540.2612 1.3358332e+10 0.18121652 0.050977500 102.83911 42.518518 6542.2972 1.2316471e+10 0.17838119 0.051115077 102.92966 42.369378 6544.3332 1.1339237e+10 0.17522898 0.051914671 103.01589 42.227348 6546.3692 1.0474412e+10 0.17156110 0.052768356 103.09351 42.099518 6548.4053 9.7275141e+09 0.16840441 0.053788671 103.17298 41.968635 6550.4413 9.0242323e+09 0.16568753 0.055095851 103.26352 41.819494 6552.4773 8.3220345e+09 0.16340027 0.055466632 103.34942 41.676017 6554.5133 7.7125626e+09 0.16070325 0.054843152 103.42246 41.548187 6556.5493 7.1862048e+09 0.15790875 0.053932365 103.49683 41.418751 6558.5853 6.6778403e+09 0.15506326 0.052740525 103.58736 41.269642 6560.6214 6.1872877e+09 0.15200370 0.051714079 103.67444 41.124737 6562.6574 5.7535087e+09 0.14908224 0.050254393 103.74748 40.996905 6564.6934 5.3870470e+09 0.14603048 0.048457356 103.82064 40.868836 6566.7294 5.0073659e+09 0.14333726 0.046770265 103.90584 40.714415 6568.7654 4.6343435e+09 0.14086053 0.045068064 103.98889 40.563408 6570.8014 4.2916395e+09 0.13885695 0.044585530 104.05737 40.435576 6572.8374 4.0067694e+09 0.13653596 0.043750572 104.12585 40.307744 6574.8735 3.7497865e+09 0.13377594 0.042435484 104.21006 40.159895 6576.9095 3.4818480e+09 0.13080559 0.040324567 104.29425 40.012076 6578.9455 3.2394922e+09 0.12729513 0.037156573 104.36273 39.884246 6580.9815 3.0299965e+09 0.12424069 0.035613700 104.43121 39.756416 6583.0175 2.8563247e+09 0.12160032 0.035012798 104.50367 39.628585 6585.0535 2.6980150e+09 0.11862661 0.033927971 104.57671 39.500753 6587.0896 2.5312785e+09 0.11563808 0.033178211 104.65442 39.358406 6589.1256 2.3564680e+09 0.11267117 0.032796862 104.73432 39.209266 6591.1616 2.1933499e+09 0.10936063 0.029019582 104.80504 39.077255 6593.1976 2.0567838e+09 0.10664113 0.026918514 104.87352 38.949425 6595.2336 1.9301023e+09 0.10396241 0.025647798 104.94901 38.808523 6597.2696 1.8034793e+09 0.10171514 0.025637642 105.02891 38.659382 6599.3056 1.6728182e+09 0.10045804 0.024948113 105.09704 38.525924 6601.3417 1.5612380e+09 0.10053787 0.027206592 105.16096 38.398093 6603.3777 1.4776501e+09 0.099493099 0.026439691 105.22736 38.270263 6605.4137 1.3990597e+09 0.099033210 0.027012097 105.29584 38.142433 6607.4497 1.3276967e+09 0.097526049 0.024818996 105.36269 38.014610 6609.4857 1.2636854e+09 0.094696290 0.023850213 105.42660 37.886800 6611.5217 1.2010822e+09 0.092199448 0.024625742 105.49226 37.755483 6613.5578 1.1389146e+09 0.091324315 0.023778231 105.56683 37.606344 6615.5938 1.0682118e+09 0.090102299 0.023269800 105.63834 37.463319 6617.6298 9.9978864e+08 0.089383843 0.023648052 105.70226 37.335489 6619.6658 9.4188473e+08 0.088803516 0.024686560 105.76617 37.207659 6621.7018 8.9998146e+08 0.087701435 0.024856828 105.83009 37.079827 6623.7378 8.6460113e+08 0.085869808 0.024765180 105.89400 36.951995 6625.7738 8.1425570e+08 0.084815977 0.026321032 105.96757 36.804855 6627.8099 7.6045914e+08 0.083160588 0.025629646 106.04184 36.656328 6629.8459 7.0807269e+08 0.082006200 0.025956168 106.10575 36.528498 6631.8819 6.6920245e+08 0.080278431 0.026020348 106.16967 36.400668 6633.9179 6.4328076e+08 0.078717924 0.026312510 106.22975 36.272836 6635.9539 6.1120640e+08 0.077242592 0.026542842 106.28910 36.145005 6637.9899 5.8005976e+08 0.076349767 0.025676572 106.35141 36.017173 6640.0260 5.5256569e+08 0.076388130 0.025267477 106.41533 35.889342 6642.0620 5.2357940e+08 0.076770507 0.025154232 106.48168 35.751762 6644.0980 4.9483440e+08 0.076132400 0.025354196 106.55093 35.602623 6646.1340 4.6762831e+08 0.075542394 0.025989508 106.61443 35.465844 6648.1700 4.4081411e+08 0.074944725 0.027078091 106.67378 35.338012 6650.2060 4.1306560e+08 0.074653384 0.026302402 106.73313 35.210181 6652.2420 3.9256681e+08 0.074415237 0.027317117 106.79248 35.082351 6654.2781 3.7676850e+08 0.073848342 0.027917770 106.85183 34.954521 6656.3141 3.6563714e+08 0.072266802 0.028299078 106.91118 34.826691 6658.3501 3.5166624e+08 0.071064323 0.030681969 106.97053 34.698861 6660.3861 3.3526265e+08 0.069946714 0.031976947 107.02988 34.571030 6662.4221 3.1883604e+08 0.068834400 0.032807437 107.08923 34.443198 6664.4581 3.0342385e+08 0.068024006 0.030529793 107.15668 34.302285 6666.4942 2.8455157e+08 0.068140442 0.027004886 107.22592 34.158472 6668.5302 2.6853980e+08 0.067362851 0.027939933 107.28156 34.029699 6670.5662 2.5803811e+08 0.067308606 0.027066330 107.33634 33.901867 6672.6022 2.5109756e+08 0.067080875 0.027228643 107.39455 33.774037 6674.6382 2.4226226e+08 0.065990420 0.029493164 107.45391 33.646207 6676.6742 2.3309031e+08 0.063951460 0.032148259 107.51070 33.518377 6678.7102 2.2571550e+08 0.063303141 0.030461574 107.56548 33.390547 6680.7463 2.2145614e+08 0.064140837 0.029602565 107.62364 33.254845 6682.7823 2.1296127e+08 0.064886674 0.031022229 107.68754 33.105733 6684.8183 2.0077108e+08 0.065023080 0.032695616 107.74696 32.969340 6686.8543 1.9125283e+08 0.063834661 0.034258131 107.80174 32.846074 6688.8903 1.7516522e+08 0.061504246 0.033990706 107.85653 32.721431 6690.9263 1.6308067e+08 0.060886149 0.033009705 107.91131 32.593601 6692.9623 1.5738302e+08 0.060339071 0.031647810 107.96610 32.465771 6694.9984 1.5591220e+08 0.059930072 0.029861766 108.02088 32.337941 6697.0344 1.5379723e+08 0.059563273 0.030095616 108.07567 32.210111 6699.0704 1.4858565e+08 0.058495540 0.031525477 108.13045 32.086484 6701.1064 1.3728489e+08 0.057011628 0.031565581 108.18523 31.963219 6703.1424 1.2493776e+08 0.057073087 0.034031630 108.24669 31.821051 6705.1784 1.1245528e+08 0.057450007 0.036985838 108.31061 31.671911 6707.2145 97553709. 0.057392418 0.040156106 108.36284 31.540950 6709.2505 88272435. 0.056955731 0.040973231 108.41306 31.413120 6711.2865 83470444. 0.055394693 0.041018176 108.46631 31.288314 6713.3225 84178240. 0.053533689 0.044853046 108.52109 31.165048 6715.3585 83122418. 0.051834337 0.047745270 108.57372 31.039626 6717.3945 79765354. 0.050006257 0.049849865 108.62394 30.911795 6719.4305 77385782. 0.048338268 0.050960786 108.67652 30.777957 6721.4666 73285504. 0.048774198 0.050444477 108.73511 30.628818 6723.5026 77465364. 0.047352029 0.049649241 108.79216 30.490144 6725.5386 76298985. 0.043488002 0.041239586 108.84694 30.366879 6727.5746 71328115. 0.042543512 0.040194842 108.90075 30.242636 6729.6106 64019590. 0.041859988 0.040638430 108.95097 30.114805 6731.6466 56534721. 0.040378638 0.043036958 109.00139 29.986596 6733.6827 53196121. 0.039520545 0.047630644 109.05998 29.842781 6735.7187 52406442. 0.040846176 0.050056355 109.11735 29.701304 6737.7547 52902589. 0.042292089 0.056539637 109.16756 29.573474 6739.7907 50952216. 0.042426214 0.063794220 109.21778 29.445644 6741.8267 49119971. 0.040605462 0.068116536 109.26800 29.322177 6743.8627 44733420. 0.036138012 0.076867408 109.31822 29.198911 6745.8987 42700348. 0.034750836 0.078944712 109.37076 29.055863 6747.9348 47171156. 0.029826073 0.067039358 109.42402 28.906752 6749.9708 48859522. 0.022159652 0.072012133 109.47458 28.780584 6752.0068 50906025. 0.024043985 0.074126615 109.52480 28.657319 6754.0428 46140577. 0.032246427 0.076144630 109.57502 28.534054