# # 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 = 40.621843 km # Date (UTC) = 2017-01-12T14:39:43.754 # Date (julian) = 2457766.11092308 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6503.7500 6.8702466e+10 0.065551677 0.033414020 35.426863 36.897186 6505.9936 6.3197060e+10 0.076330481 0.034090561 35.492891 36.773935 6508.2372 5.7362878e+10 0.087298473 0.034767101 35.558919 36.650684 6510.4807 5.1450088e+10 0.098417014 0.035443642 35.636984 36.516964 6512.7243 4.5513597e+10 0.10965103 0.036120182 35.717477 36.381133 6514.9678 4.0062115e+10 0.12108545 0.036796723 35.785755 36.255925 6517.2114 3.5514865e+10 0.13285062 0.037473263 35.851783 36.132674 6519.4550 3.1975732e+10 0.14504292 0.038149804 35.920332 36.009422 6521.6985 2.8936586e+10 0.15753109 0.038826344 35.990761 35.886170 6523.9421 2.6194574e+10 0.16455114 0.039412608 36.059865 35.764243 6526.1857 2.3784141e+10 0.16991360 0.039862727 36.125892 35.645393 6528.4292 2.1537508e+10 0.17522435 0.041782985 36.191919 35.526415 6530.6728 1.9574678e+10 0.17885192 0.044770582 36.257947 35.403164 6532.9163 1.7795468e+10 0.18219403 0.047449703 36.323975 35.279914 6535.1599 1.5965725e+10 0.18299489 0.048154928 36.397147 35.147136 6537.4035 1.4223508e+10 0.18259368 0.048875445 36.472609 35.011305 6539.6470 1.2593081e+10 0.18151029 0.050426848 36.540818 34.885141 6541.8906 1.1221116e+10 0.17816552 0.051037716 36.606855 34.761872 6544.1342 1.0095587e+10 0.17415599 0.051753182 36.670694 34.638611 6546.3777 9.1459343e+09 0.17024449 0.052775332 36.732319 34.515359 6548.6213 8.3417766e+09 0.16691697 0.053853184 36.794941 34.393103 6550.8649 7.6426636e+09 0.16413071 0.055201911 36.860969 34.274255 6553.1084 7.0339168e+09 0.16183431 0.055280569 36.926997 34.155407 6555.3520 6.4668696e+09 0.15898585 0.054557620 36.988823 34.032355 6557.5955 5.9416588e+09 0.15610893 0.053492821 37.050448 33.909102 6559.8391 5.4848361e+09 0.15291760 0.052292470 37.112073 33.788856 6562.0827 5.0593890e+09 0.14945267 0.050801244 37.173699 33.670007 6564.3262 4.7030053e+09 0.14583332 0.048623751 37.235324 33.549348 6566.5698 4.3845350e+09 0.14291785 0.046860555 37.296950 33.426098 6568.8134 4.0759462e+09 0.14014357 0.045023996 37.358575 33.303459 6571.0569 3.8177258e+09 0.13764229 0.044487730 37.420202 33.184610 6573.3005 3.5451444e+09 0.13486816 0.043416354 37.481829 33.065760 6575.5440 3.2559830e+09 0.13179403 0.041828862 37.551092 32.927818 6577.7876 2.9513498e+09 0.12864024 0.038983234 37.621523 32.786957 6580.0312 2.6648190e+09 0.12541055 0.036491948 37.684208 32.665458 6582.2747 2.4322634e+09 0.12215042 0.035219033 37.745833 32.546608 6584.5183 2.2442521e+09 0.11889574 0.034233176 37.804784 32.427759 6586.7619 2.0804384e+09 0.11566716 0.033161448 37.862008 32.308909 6589.0054 1.9226213e+09 0.11245612 0.033035223 37.920714 32.188574 6591.2490 1.7881136e+09 0.10859234 0.028920961 37.982349 32.065305 6593.4925 1.6572026e+09 0.10524763 0.026644302 38.043698 31.942321 6595.7361 1.5392570e+09 0.10181489 0.025699908 38.100921 31.823472 6597.9797 1.4340323e+09 0.099562548 0.025413580 38.158143 31.704622 6600.2232 1.3350173e+09 0.099028002 0.025448807 38.215367 31.582283 6602.4668 1.2501152e+09 0.098464575 0.027118286 38.272592 31.459031 6604.7104 1.1692725e+09 0.097589250 0.026493066 38.329816 31.338073 6606.9539 1.0986960e+09 0.096693057 0.025789791 38.387040 31.219224 6609.1975 1.0354127e+09 0.093711446 0.023764595 38.444264 31.100374 6611.4411 9.7749991e+08 0.091064942 0.024677196 38.501489 30.981525 6613.6846 9.1708857e+08 0.090217383 0.023824777 38.558713 30.862676 6615.9282 8.6019357e+08 0.088820888 0.023280089 38.615936 30.743827 6618.1717 8.0904987e+08 0.088317098 0.023900480 38.673158 30.624977 6620.4153 7.6273411e+08 0.087659218 0.024901028 38.730382 30.503021 6622.6589 7.2737623e+08 0.086262355 0.024582625 38.787606 30.379769 6624.9024 6.8618099e+08 0.084800184 0.025345375 38.844831 30.258428 6627.1460 6.5257619e+08 0.082713103 0.025373205 38.902055 30.139580 6629.3896 6.1628478e+08 0.081589658 0.026038672 38.959789 30.017978 6631.6331 5.7346192e+08 0.079908700 0.025995078 39.020157 29.882147 6633.8767 5.3099263e+08 0.078511548 0.026305312 39.079978 29.749277 6636.1202 4.8960854e+08 0.077097786 0.026503057 39.137202 29.630427 6638.3638 4.5862286e+08 0.076061121 0.025655792 39.194426 29.511578 6640.6074 4.3442269e+08 0.076223708 0.025196339 39.247684 29.392712 6642.8509 4.1223941e+08 0.075958457 0.025186518 39.300514 29.273844 6645.0945 3.8878853e+08 0.075075074 0.025495952 39.356117 29.152210 6647.3381 3.6886211e+08 0.074146120 0.026615769 39.413341 29.028959 6649.5816 3.4792519e+08 0.073587140 0.026831951 39.468983 28.907290 6651.8252 3.2652291e+08 0.073563536 0.027116550 39.521804 28.788441 6654.0687 3.0472378e+08 0.073324292 0.028006939 39.574626 28.669591 6656.3123 2.8697128e+08 0.071875969 0.028297531 39.627447 28.550742 6658.5559 2.7621265e+08 0.070597154 0.031046931 39.680269 28.431892 6660.7994 2.6471921e+08 0.069437537 0.032352646 39.733092 28.313042 6663.0430 2.5136462e+08 0.068470811 0.032471297 39.785915 28.194192 6665.2866 2.3637836e+08 0.068168071 0.028077589 39.842843 28.066105 6667.5301 2.1903673e+08 0.067916571 0.027298182 39.903212 27.930275 6669.7737 2.0594229e+08 0.067343352 0.027561071 39.959382 27.803890 6672.0173 1.9141171e+08 0.067375670 0.026889598 40.012204 27.685041 6674.2608 1.7828199e+08 0.066601715 0.029174805 40.063773 27.566191 6676.5044 1.7168718e+08 0.064332691 0.032038792 40.112194 27.447342 6678.7479 1.6059039e+08 0.063570933 0.030436360 40.160673 27.328492 6680.9915 1.5207443e+08 0.064521844 0.029655523 40.213491 27.209643 6683.2351 1.4108508e+08 0.065151760 0.031533072 40.266313 27.090794 6685.4786 1.2944696e+08 0.064872568 0.033210387 40.324728 26.959363 6687.7222 1.2477183e+08 0.062608672 0.033940127 40.385099 26.823532 6689.9658 1.1790296e+08 0.060409006 0.033146690 40.436468 26.700490 6692.2093 1.1117355e+08 0.059267789 0.032522261 40.484886 26.581641 6694.4529 1.0203470e+08 0.058441450 0.030626291 40.535429 26.462783 6696.6964 93531411. 0.058105019 0.029965144 40.588260 26.343916 6698.9400 89783145. 0.056858881 0.031508084 40.640165 26.225976 6701.1836 88562785. 0.055033885 0.031678795 40.688585 26.111529 6703.4271 88869773. 0.054919995 0.034744056 40.737006 25.997081 6705.6707 83609172. 0.054981051 0.037860967 40.791915 25.862573 6707.9143 81573914. 0.054642803 0.040055860 40.847251 25.726742 6710.1578 76681104. 0.053366495 0.040527386 40.896015 25.607050 6712.4014 71654024. 0.051119018 0.042575195 40.944436 25.488201 6714.6449 68500968. 0.048953480 0.047351896 40.992856 25.369351 6716.8885 62480066. 0.046729106 0.049710054 41.041277 25.250502 6719.1321 61220706. 0.044346927 0.051244359 41.092512 25.124744 6721.3756 61244838. 0.044690268 0.050417080 41.147850 24.988913 6723.6192 59737099. 0.042883777 0.049714282 41.200290 24.862043 6725.8628 54919543. 0.038237016 0.041037094 41.248710 24.747595 6728.1063 49763649. 0.036442268 0.039778797 41.297131 24.632500 6730.3499 45012173. 0.033223815 0.040858642 41.345551 24.513650 6732.5935 46734124. 0.028937020 0.043849461 41.393971 24.394801 6734.8370 48320139. 0.011157902 0.049303239 41.448447 24.261085 6737.0806 47728272. 0.028057159 0.054392245 41.503784 24.125254 6739.3241 44418222. 0.062150967 0.063223237 41.552981 24.008405