# # 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 = 41.209681 km # Date (UTC) = 2017-01-20T11:03:29.348 # Date (julian) = 2457773.96075634 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6510.4434 4.0079556e+10 0.10072904 0.035432376 88.263853 42.025122 6512.5391 3.7571009e+10 0.11151552 0.036064352 88.348442 41.893540 6514.6349 3.4437563e+10 0.12223834 0.036696328 88.439451 41.745614 6516.7307 3.1233886e+10 0.13301674 0.037328304 88.532657 41.592097 6518.8265 2.8253403e+10 0.14392740 0.037960280 88.613595 41.458785 6520.9222 2.5666412e+10 0.15501940 0.038592256 88.693484 41.327201 6523.0180 2.3553840e+10 0.16352458 0.039183578 88.773373 41.195618 6525.1138 2.1650692e+10 0.16950687 0.039769228 88.853262 41.064036 6527.2096 1.9930400e+10 0.17377508 0.040868621 88.933153 40.932454 6529.3053 1.8400210e+10 0.17674450 0.042722175 89.013045 40.800871 6531.4011 1.7030780e+10 0.17942373 0.045812519 89.090410 40.669288 6533.4969 1.5779716e+10 0.18151422 0.047730755 89.165598 40.537704 6535.5927 1.4485554e+10 0.18140884 0.047967196 89.248164 40.397139 6537.6885 1.3143096e+10 0.18179396 0.049009801 89.341370 40.243622 6539.7842 1.1887331e+10 0.18140328 0.050592917 89.424027 40.102950 6541.8800 1.0794276e+10 0.17912501 0.051041151 89.499220 39.971367 6543.9758 9.9351823e+09 0.17639259 0.051637992 89.574410 39.839784 6546.0716 9.2240743e+09 0.17311977 0.052523408 89.649598 39.708200 6548.1673 8.5276717e+09 0.17031097 0.053717618 89.724787 39.576617 6550.2631 7.9133549e+09 0.16727291 0.055051240 89.799979 39.445035 6552.3589 7.3490292e+09 0.16436382 0.055496434 89.874223 39.313452 6554.4547 6.8173969e+09 0.16143339 0.054841921 89.944714 39.181870 6556.5504 6.3616694e+09 0.15868617 0.053932200 90.015552 39.050289 6558.6462 5.9158112e+09 0.15578603 0.052688647 90.090727 38.918728 6560.7420 5.4985330e+09 0.15261563 0.051605306 90.165903 38.787166 6562.8378 5.1027380e+09 0.14980507 0.050082734 90.236650 38.655585 6564.9335 4.7328934e+09 0.14706557 0.048348514 90.307141 38.524002 6567.0293 4.4167084e+09 0.14441630 0.046592393 90.381476 38.392420 6569.1251 4.1256350e+09 0.14181187 0.044860567 90.456667 38.260838 6571.2209 3.8666260e+09 0.13974395 0.044442949 90.528615 38.129255 6573.3167 3.6278780e+09 0.13725879 0.043403375 90.599103 37.997671 6575.4124 3.4049870e+09 0.13452992 0.041960911 90.669593 37.868727 6577.5082 3.2034133e+09 0.13149274 0.039422103 90.740085 37.741843 6579.6040 3.0072024e+09 0.12817258 0.036738461 90.808537 37.612921 6581.6998 2.8229024e+09 0.12511231 0.035384712 90.874328 37.481339 6583.7955 2.6555262e+09 0.12211310 0.034619002 90.941557 37.349757 6585.8913 2.4926400e+09 0.11915902 0.033258189 91.012049 37.218174 6587.9871 2.3360156e+09 0.11674977 0.033377070 91.081704 37.086592 6590.0829 2.1928492e+09 0.11363652 0.030907925 91.147495 36.955010 6592.1786 2.0664284e+09 0.11003306 0.027900011 91.213521 36.823427 6594.2744 1.9497799e+09 0.10665826 0.026021881 91.284013 36.691843 6596.3702 1.8306730e+09 0.10336017 0.025725591 91.354504 36.560260 6598.4660 1.7138116e+09 0.10128603 0.025184694 91.420662 36.428677 6600.5617 1.6110487e+09 0.10097909 0.026144725 91.486453 36.297094 6602.6575 1.5114168e+09 0.10032910 0.026955528 91.552244 36.165512 6604.7533 1.4180142e+09 0.099520181 0.026518561 91.618035 36.033930 6606.8491 1.3274081e+09 0.098683706 0.025978198 91.683826 35.905478 6608.9449 1.2414234e+09 0.095941784 0.023707389 91.749617 35.778595 6611.0406 1.1653881e+09 0.093245855 0.024932546 91.815408 35.649181 6613.1364 1.0856596e+09 0.092529407 0.023623638 91.881200 35.517597 6615.2322 1.0166541e+09 0.091454738 0.023258675 91.941930 35.392762 6617.3280 9.6811556e+08 0.090343417 0.023547983 91.995387 35.277631 6619.4237 9.2704156e+08 0.089653892 0.024628155 92.048843 35.162499 6621.5195 8.8920830e+08 0.088637676 0.024917252 92.114366 35.031273 6623.6153 8.4668047e+08 0.086923246 0.024719781 92.180158 34.899691 6625.7111 7.9848639e+08 0.085790216 0.026246119 92.241952 34.768107 6627.8068 7.5692472e+08 0.084001574 0.025628481 92.303042 34.636523 6629.9026 7.1470501e+08 0.082731107 0.025945909 92.367529 34.508336 6631.9984 6.7004939e+08 0.081013680 0.026032182 92.433320 34.381454 6634.0942 6.3325764e+08 0.079522880 0.026333712 92.496316 34.251777 6636.1899 5.9313274e+08 0.078079484 0.026475988 92.557407 34.120193 6638.2857 5.5752247e+08 0.077032971 0.025659194 92.618500 33.988610 6640.3815 5.3066344e+08 0.077078111 0.025223975 92.679594 33.857027 6642.4773 4.9710113e+08 0.077093340 0.025171227 92.740688 33.727035 6644.5731 4.7138016e+08 0.076329050 0.025405541 92.801778 33.600152 6646.6688 4.4415095e+08 0.075620983 0.026266356 92.861879 33.472278 6648.7646 4.1730494e+08 0.074875774 0.027476115 92.918273 33.340696 6650.8604 3.9750223e+08 0.074774027 0.026452203 92.975056 33.209114 6652.9562 3.7506591e+08 0.074750389 0.027513599 93.036146 33.077530 6655.0519 3.5473841e+08 0.073861035 0.027631677 93.097237 32.945946 6657.1477 3.3982004e+08 0.072241789 0.029072454 93.151039 32.833996 6659.2435 3.2779385e+08 0.070935677 0.031783806 93.204495 32.722975 6661.3393 3.1681765e+08 0.069770932 0.032707745 93.259485 32.601204 6663.4350 3.0514557e+08 0.068675615 0.032362652 93.315876 32.469621 6665.5308 2.8763633e+08 0.068564179 0.027677364 93.374124 32.338039 6667.6266 2.6979687e+08 0.068152907 0.027333617 93.435218 32.206457 6669.7224 2.5443983e+08 0.067492807 0.027613776 93.495057 32.076129 6671.8181 2.4068695e+08 0.067414599 0.026877008 93.551447 31.949245 6673.9139 2.2788304e+08 0.066743988 0.028826060 93.607838 31.821709 6676.0097 2.1300253e+08 0.064625093 0.031719977 93.664232 31.690126 6678.1055 1.9780680e+08 0.063747693 0.030866065 93.720626 31.558595 6680.2013 1.8407081e+08 0.064085740 0.029484876 93.777016 31.431712 6682.2970 1.7373741e+08 0.064769268 0.030651486 93.833406 31.304829 6684.3928 1.6396475e+08 0.064848525 0.032674025 93.889800 31.173796 6686.4886 1.5547596e+08 0.063805077 0.034045350 93.946193 31.042213 6688.5844 1.5190221e+08 0.061175293 0.033920081 94.002588 30.914178 6690.6801 1.4753917e+08 0.059958405 0.033037919 94.058982 30.787294 6692.7759 1.4060584e+08 0.059248398 0.031864307 94.115374 30.657462 6694.8717 1.3273506e+08 0.058793144 0.030039307 94.171764 30.525879 6696.9675 1.2288101e+08 0.058486756 0.030077748 94.225809 30.396643 6699.0632 1.1598444e+08 0.057395144 0.031532076 94.277502 30.269761 6701.1590 1.1343883e+08 0.055799818 0.031642773 94.328323 30.147242 6703.2548 1.1101120e+08 0.055798644 0.034312816 94.377667 30.032109 6705.3506 1.0709892e+08 0.056058235 0.037291854 94.427010 29.916976 6707.4463 1.0214596e+08 0.055863023 0.040122887 94.478561 29.790805 6709.5421 95223301. 0.055185303 0.040787725 94.530255 29.663922 6711.6379 93461373. 0.053427528 0.041417991 94.585763 29.537038 6713.7337 86867372. 0.051538313 0.046340182 94.642157 29.410155 6715.8295 78317471. 0.049985327 0.048226931 94.695336 29.280059 6717.9252 69420888. 0.048130664 0.049817039 94.747026 29.148476 6720.0210 64603169. 0.047128799 0.050417332 94.798717 29.019504 6722.1168 68027910. 0.047304821 0.050460828 94.850411 28.892620 6724.2126 71120831. 0.044992142 0.048151638 94.902104 28.765737 6726.3083 72477962. 0.041747011 0.040954148 94.953798 28.638853 6728.4041 67923596. 0.041203085 0.040200862 95.005491 28.510562 6730.4999 64912247. 0.039614471 0.041064314 95.057185 28.378980 6732.5957 61668774. 0.037995385 0.043849869 95.108878 28.248204 6734.6914 59183432. 0.037197362 0.049311997 95.160572 28.121320 6736.7872 54698710. 0.037033739 0.053331138 95.212266 27.994436 6738.8830 48463995. 0.026280160 0.062182395 95.263960 27.867552 6740.9788 46035789. 0.033776234 0.065722428 95.315653 27.740669 6743.0745 47696508. 0.050537733 0.071550350 95.367346 27.613785