# # 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 = 43.642169 km # Date (UTC) = 2017-01-03T09:12:50.840 # Date (julian) = 2457756.88392176 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6505.5821 7.9902488e+10 0.076003138 0.033966491 118.18704 32.019323 6507.9548 6.8685198e+10 0.087032493 0.034681952 118.25059 31.898827 6510.3274 5.9713564e+10 0.098303632 0.035397413 118.30852 31.782970 6512.7000 5.2776947e+10 0.10991993 0.036112875 118.36644 31.667573 6515.0727 4.7279546e+10 0.12193228 0.036828336 118.42437 31.555853 6517.4453 4.2452144e+10 0.13423588 0.037543797 118.48230 31.444133 6519.8179 3.7903138e+10 0.14674286 0.038259258 118.54526 31.322714 6522.1906 3.3571563e+10 0.15888507 0.038967156 118.61043 31.197027 6524.5632 2.9600475e+10 0.16539004 0.039627043 118.67165 31.076702 6526.9358 2.6461045e+10 0.17092897 0.040649209 118.72958 30.960829 6529.3085 2.3858649e+10 0.17469387 0.042727160 118.78846 30.843683 6531.6811 2.1421541e+10 0.17835564 0.046220041 118.85363 30.717996 6534.0537 1.9097506e+10 0.18004819 0.047959591 118.91880 30.592309 6536.4264 1.6969546e+10 0.18014009 0.048171990 118.97686 30.480332 6538.7990 1.5226329e+10 0.18032793 0.049545756 119.03479 30.368613 6541.1716 1.3828233e+10 0.17895891 0.051270867 119.09272 30.256893 6543.5443 1.2586660e+10 0.17636619 0.051524740 119.15065 30.145173 6545.9169 1.1462762e+10 0.17238456 0.052463782 119.20896 30.031384 6548.2895 1.0353507e+10 0.16891887 0.053754112 119.26948 29.905699 6550.6622 9.3382400e+09 0.16512488 0.055151162 119.32998 29.780064 6553.0348 8.4596377e+09 0.16210891 0.055317571 119.38793 29.664139 6555.4074 7.7265363e+09 0.15911809 0.054511020 119.44587 29.548265 6557.7801 7.0986260e+09 0.15616174 0.053377157 119.50531 29.426666 6560.1527 6.4882244e+09 0.15293088 0.052136628 119.56582 29.300979 6562.5253 5.9174227e+09 0.14946796 0.050380027 119.62341 29.181372 6564.8980 5.4300378e+09 0.14643038 0.048364638 119.67721 29.069652 6567.2706 5.0251491e+09 0.14364530 0.046388387 119.73108 28.957932 6569.6432 4.6772495e+09 0.14119890 0.044894289 119.78900 28.846213 6572.0159 4.3573803e+09 0.13887992 0.044221069 119.84693 28.734494 6574.3885 4.0420647e+09 0.13583969 0.042668410 119.90642 28.614370 6576.7611 3.7199240e+09 0.13300314 0.040495313 119.96693 28.488683 6579.1338 3.4195857e+09 0.12948718 0.036996961 120.02252 28.369331 6581.5064 3.1645466e+09 0.12646876 0.035443264 120.07217 28.257611 6583.8790 2.9474563e+09 0.12337503 0.034576740 120.12223 28.145377 6586.2517 2.7437781e+09 0.12033240 0.033168043 120.18275 28.019671 6588.6243 2.5338520e+09 0.11763885 0.033171445 120.24328 27.893965 6590.9969 2.3380968e+09 0.11403946 0.029207620 120.29781 27.780692 6593.3696 2.1701965e+09 0.11070920 0.026758639 120.35160 27.668973 6595.7422 2.0267014e+09 0.10665801 0.025700539 120.40857 27.550659 6598.1148 1.8838708e+09 0.10332683 0.025352342 120.46909 27.424972 6600.4875 1.7426686e+09 0.10168051 0.025992006 120.52609 27.303810 6602.8601 1.6216172e+09 0.10010659 0.026782663 120.57574 27.192090 6605.2327 1.5191500e+09 0.099007353 0.026860283 120.62539 27.080370 6607.6054 1.4393253e+09 0.097302787 0.024511637 120.67880 26.972404 6609.9780 1.3671999e+09 0.094324731 0.023996441 120.73259 26.864822 6612.3506 1.2899330e+09 0.092220013 0.024058778 120.78740 26.748352 6614.7233 1.2078771e+09 0.091384243 0.023442196 120.84327 26.622648 6617.0959 1.1245111e+09 0.090268816 0.023471042 120.89701 26.501733 6619.4685 1.0501928e+09 0.089879038 0.024638961 120.94666 26.390014 6621.8412 9.8911538e+08 0.088977239 0.024810642 120.99631 26.278294 6624.2138 9.2926744e+08 0.087257361 0.024976750 121.05172 26.153644 6626.5864 8.6971984e+08 0.085839919 0.025843746 121.10758 26.027957 6628.9591 8.1143209e+08 0.084598135 0.026092481 121.16183 25.913130 6631.3317 7.6324927e+08 0.082924307 0.025964459 121.21562 25.801410 6633.7043 7.2063771e+08 0.081470888 0.026275220 121.27016 25.686331 6636.0770 6.7954436e+08 0.079883697 0.026519868 121.32602 25.565299 6638.4496 6.3972285e+08 0.078784834 0.025652055 121.37968 25.446244 6640.8222 6.0532344e+08 0.079058525 0.025170052 121.42520 25.334510 6643.1949 5.7159835e+08 0.078539700 0.025222039 121.47072 25.222776 6645.5675 5.3534539e+08 0.077345647 0.025717530 121.52448 25.099933 6647.9401 4.9620806e+08 0.076216728 0.026932757 121.58033 24.974246 6650.3128 4.5656297e+08 0.075381552 0.026326835 121.63620 24.851576 6652.6854 4.2296497e+08 0.074883590 0.027439098 121.69206 24.730544 6655.0580 3.9341847e+08 0.073787215 0.027634189 121.74482 24.614166 6657.4306 3.6947905e+08 0.072051955 0.029400651 121.79447 24.502447 6659.8033 3.4597415e+08 0.070896788 0.031667033 121.84425 24.389568 6662.1759 3.2658503e+08 0.069687797 0.032945572 121.89545 24.263880 6664.5485 3.0916911e+08 0.068949025 0.030198973 121.94666 24.138193 6666.9212 2.9353631e+08 0.068996550 0.027088099 121.99641 24.029431 6669.2938 2.8029336e+08 0.068081953 0.028053935 122.04607 23.921850 6671.6664 2.6688650e+08 0.068280910 0.026874846 122.09653 23.804880 6674.0391 2.5139878e+08 0.067675933 0.028987757 122.14774 23.679174 6676.4117 2.3853815e+08 0.065419984 0.031979070 122.20068 23.555199 6678.7843 2.2403964e+08 0.064635607 0.030412010 122.25654 23.434167 6681.1570 2.0840164e+08 0.065793940 0.029777790 122.31011 23.316121 6683.5296 2.0004706e+08 0.066339174 0.031964732 122.35562 23.208539 6685.9022 1.8874271e+08 0.065927094 0.033657830 122.40114 23.100957 6688.2749 1.7967590e+08 0.063216129 0.033848641 122.45123 22.978797 6690.6475 1.7212214e+08 0.061456289 0.033041658 122.50243 22.853109 6693.0201 1.5924689e+08 0.060546163 0.031597179 122.55364 22.730481 6695.3928 1.5301795e+08 0.059862716 0.029787326 122.60485 22.609449 6697.7654 1.4751330e+08 0.059000989 0.030188129 122.65605 22.486049 6700.1380 1.3847769e+08 0.057170941 0.030770107 122.70726 22.360364 6702.5107 1.2828949e+08 0.055701176 0.033284505 122.75641 22.241206 6704.8833 1.1506070e+08 0.055789184 0.036611303 122.80193 22.133624 6707.2559 1.0826918e+08 0.055175439 0.040150163 122.84744 22.026042 6709.6286 1.0928597e+08 0.054122891 0.040732741 122.89834 21.905748 6712.0012 1.0921996e+08 0.051773167 0.041832196 122.94955 21.784698 6714.3738 1.0658270e+08 0.049386194 0.047331514 123.00076 21.659957 6716.7465 1.0212116e+08 0.047100301 0.049500843 123.05196 21.534270 6719.1191 95440427. 0.044302130 0.051256681 123.10317 21.411599 6721.4917 90949231. 0.044357290 0.050452062 123.15438 21.290568 6723.8644 83950685. 0.041963348 0.049851017 123.20558 21.169536 6726.2370 79452252. 0.037396197 0.040953505 123.25679 21.048504 6728.6096 79154904. 0.036490943 0.040492152 123.30636 20.927473 6730.9823 74638486. 0.034071969 0.041725712 123.35291 20.806441 6733.3549 71481865. 0.032139449 0.045851166 123.40040 20.685410 6735.7275 65606193. 0.032038881 0.050065763 123.45161 20.564378 6738.1002 61801638. 0.032428670 0.057872553 123.50282 20.443091 6740.4728 56511939. 0.030177847 0.064858058 123.55402 20.317404 6742.8454 52693383. 0.024699411 0.070670806 123.60523 20.191717 6745.2181 47527582. 0.017503352 0.078658559 123.65221 20.070252 6747.5907 45387040. 0.0084001482 0.067157807 123.69876 19.949220 6749.9633 48900795. -0.00042240035 0.072014172 123.74532 19.828175 6752.3360 50232181. -0.050089657 0.073745704 123.79187 19.707125 6754.7086 52784577. -0.0078882098 0.075073959 123.84127 19.586087 6757.0812 47190456. 0.074152506 0.076493547 123.89247 19.465055