# # 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 = 45.409653 km # Date (UTC) = 2016-12-09T09:17:45.248 # Date (julian) = 2457731.88732926 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6513.3621 6.6904945e+10 0.11754583 0.036312510 117.59486 25.394148 6515.9768 5.7464442e+10 0.13003320 0.037100962 117.65410 25.263284 6518.5915 4.9722562e+10 0.14268720 0.037889414 117.70882 25.140150 6521.2061 4.3639332e+10 0.15559554 0.038677866 117.76354 25.015062 6523.8208 3.8420814e+10 0.16340306 0.039382554 117.81826 24.887385 6526.4355 3.3949568e+10 0.16838423 0.040124679 117.87406 24.760791 6529.0502 3.0089208e+10 0.17208667 0.042315761 117.93334 24.637673 6531.6649 2.6709616e+10 0.17533902 0.046196442 117.99242 24.514354 6534.2796 2.3750294e+10 0.17647522 0.048022767 118.04714 24.386676 6536.8943 2.1149095e+10 0.17645641 0.048590628 118.10186 24.258999 6539.5090 1.8828166e+10 0.17608341 0.050259708 118.15658 24.135189 6542.1236 1.6771625e+10 0.17445967 0.051049181 118.21131 24.012055 6544.7383 1.4935140e+10 0.17296073 0.052243297 118.26603 23.888933 6547.3530 1.3305204e+10 0.17103727 0.053421612 118.32075 23.765816 6549.9677 1.1858631e+10 0.16914666 0.054952451 118.37547 23.642699 6552.5824 1.0580315e+10 0.16631671 0.055440178 118.43019 23.519582 6555.1971 9.4507295e+09 0.16272105 0.054687768 118.48366 23.395222 6557.8118 8.4526554e+09 0.15796097 0.053357287 118.53382 23.267545 6560.4265 7.5786211e+09 0.15245569 0.051889803 118.58434 23.140228 6563.0411 6.8253577e+09 0.14727999 0.049880772 118.63907 23.017094 6565.6558 6.1539881e+09 0.14304016 0.047573691 118.69379 22.893960 6568.2705 5.5199738e+09 0.14053019 0.045522990 118.75458 22.757195 6570.8852 4.9286413e+09 0.13838829 0.044550826 118.81614 22.618687 6573.4999 4.3999184e+09 0.13611079 0.043256328 118.86701 22.494604 6576.1146 3.9684193e+09 0.13344673 0.041239507 118.91717 22.371486 6578.7293 3.6228373e+09 0.13042703 0.037498012 118.97073 22.248369 6581.3440 3.3286075e+09 0.12764696 0.035492454 119.02545 22.125252 6583.9586 3.0616922e+09 0.12508630 0.034536443 119.07765 22.002134 6586.5733 2.8237235e+09 0.12268720 0.033163885 119.12781 21.879017 6589.1880 2.6000869e+09 0.12029290 0.032672962 119.17797 21.754260 6591.8027 2.3956664e+09 0.11726823 0.028296148 119.22813 21.626567 6594.4174 2.2143528e+09 0.11418145 0.025943394 119.27905 21.499630 6597.0321 2.0433381e+09 0.11081487 0.025712603 119.33377 21.376513 6599.6468 1.8881271e+09 0.10880950 0.024968630 119.38849 21.253395 6602.2615 1.7551499e+09 0.10768324 0.027293516 119.43878 21.130278 6604.8761 1.6299800e+09 0.10590088 0.026591502 119.48893 21.007160 6607.4908 1.5118189e+09 0.10353280 0.024737786 119.54398 20.876045 6610.1055 1.3932495e+09 0.099426435 0.024103801 119.60041 20.742665 6612.7202 1.2801372e+09 0.096594057 0.023782640 119.65164 20.617791 6615.3349 1.1813276e+09 0.094440556 0.023261835 119.70181 20.494658 6617.9496 1.0993622e+09 0.092716340 0.023754080 119.75197 20.371536 6620.5643 1.0283420e+09 0.091477433 0.024949033 119.80213 20.248418 6623.1790 9.6504589e+08 0.089823828 0.024558127 119.85229 20.125301 6625.7936 9.1633052e+08 0.088540262 0.026344661 119.90245 20.002183 6628.4083 8.6001274e+08 0.087062084 0.025868882 119.95418 19.875198 6631.0230 7.9822847e+08 0.085664264 0.025933104 120.01061 19.736689 6633.6377 7.3454562e+08 0.084610121 0.026263590 120.06377 19.602827 6636.2524 6.7581556e+08 0.083416031 0.026451737 120.10937 19.479711 6638.8671 6.3256744e+08 0.082545484 0.025633866 120.15546 19.357089 6641.4818 5.9585482e+08 0.083496835 0.025149936 120.20563 19.238516 6644.0965 5.5909061e+08 0.082804389 0.025354031 120.25580 19.119942 6646.7111 5.1793011e+08 0.082023715 0.026288259 120.31170 18.983104 6649.3258 4.8068022e+08 0.081131112 0.027184543 120.36813 18.844595 6651.9405 4.4850852e+08 0.080942318 0.027204938 120.41409 18.720967 6654.5552 4.2362753e+08 0.080134543 0.027799702 120.45969 18.597850 6657.1699 4.0541888e+08 0.077982602 0.029098184 120.50881 18.478261 6659.7846 3.8502457e+08 0.076348558 0.031670934 120.55897 18.359704 6662.3993 3.6583865e+08 0.074655705 0.032820257 120.60979 18.229559 6665.0140 3.4215367e+08 0.073859217 0.028524261 120.66109 18.091050 6667.6286 3.1522877e+08 0.073339777 0.027334370 120.71168 17.965129 6670.2433 2.9308317e+08 0.072610346 0.027215901 120.76184 17.846556 6672.8580 2.7550517e+08 0.072083488 0.027376923 120.81000 17.725990 6675.4727 2.6100581e+08 0.069801777 0.030703765 120.85560 17.602872 6678.0874 2.5209344e+08 0.067895082 0.030878160 120.90260 17.477234 6680.7021 2.4104358e+08 0.068206253 0.029593025 120.95390 17.343855 6683.3168 2.2887724e+08 0.068800833 0.031652811 121.00486 17.213517 6685.9315 2.1720638e+08 0.068175927 0.033688686 121.05502 17.090399 6688.5461 2.0220127e+08 0.064897163 0.033911259 121.10530 16.966221 6691.1608 1.8791988e+08 0.063095115 0.032963317 121.15660 16.832841 6693.7755 1.7808139e+08 0.061544452 0.031338037 121.20702 16.701040 6696.3902 1.7181940e+08 0.060703624 0.029837909 121.25263 16.577907 6699.0049 1.6787603e+08 0.058706647 0.031585915 121.29823 16.454774 6701.6196 1.6361857e+08 0.056019098 0.032318549 121.34931 16.321793 6704.2343 1.5431777e+08 0.055479452 0.036292592 121.40061 16.188413 6706.8490 1.4611649e+08 0.054491853 0.039923948 121.45191 16.055034 6709.4636 1.4210777e+08 0.052878479 0.040837643 121.50285 15.922297 6712.0783 1.3540272e+08 0.049626525 0.041975396 121.54845 15.799179 6714.6930 1.2677472e+08 0.046253025 0.047355510 121.59405 15.676061 6717.3077 1.1063660e+08 0.042317738 0.049855235 121.64461 15.544021 6719.9224 95307805. 0.038640952 0.050493497 121.69590 15.410641 6722.5371 84190863. 0.036330102 0.049941231 121.74721 15.277263 6725.1518 77023277. 0.029961548 0.041481217 121.79851 15.143884 6727.7665 78381726. 0.028250549 0.039939245 121.84428 15.024880 6730.3811 76605920. 0.025871501 0.040901499 121.88988 14.906307 6732.9958 78086788. 0.024140257 0.043923538 121.93593 14.776212 6735.6105 73025342. 0.023152395 0.049941544 121.98209 14.642832 6738.2252 66451402. 0.022332265 0.058560960 122.03252 14.505201 6740.8399 62877390. 0.019426134 0.065485178 122.08381 14.366692 6743.4546 58689484. 0.011663365 0.074114040 122.13512 14.232695 6746.0693 60611264. 0.0073562009 0.078181939 122.18642 14.099316 6748.6840 57322994. -0.0031201553 0.070615222 122.23295 13.965937 6751.2986 55316357. -0.020088226 0.073837940 122.27911 13.832558 6753.9133 56125965. -0.096685856 0.075932999 122.33031 13.699179 6756.5280 53335644. -0.037788261 0.075525582 122.38161 13.565799 6759.1427 49391505. 0.11175095 0.075854392 122.43292 13.432420