# # 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 = 39.846355 km # Date (UTC) = 2017-01-16T09:33:19.927 # Date (julian) = 2457769.89814731 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6509.7735 5.0197037e+10 0.10038518 0.035230393 111.63370 39.006260 6511.6961 4.6172494e+10 0.11023854 0.035810143 111.69917 38.897646 6513.6187 4.2179916e+10 0.12017636 0.036389893 111.76815 38.781248 6515.5413 3.8403254e+10 0.13022202 0.036969643 111.83712 38.664850 6517.4639 3.4583510e+10 0.14027668 0.037549393 111.90610 38.544321 6519.3865 3.1224293e+10 0.15046539 0.038129143 111.97508 38.423612 6521.3090 2.8372296e+10 0.16080941 0.038708893 112.03855 38.312542 6523.2316 2.6093190e+10 0.16785893 0.039236519 112.09890 38.206923 6525.1542 2.4216031e+10 0.17347219 0.039764616 112.15926 38.101304 6527.0768 2.2354638e+10 0.17755162 0.040772218 112.22813 37.980782 6528.9994 2.0500441e+10 0.17974138 0.042235285 112.29710 37.860074 6530.9220 1.8627834e+10 0.18194437 0.045119417 112.36608 37.739365 6532.8445 1.6902592e+10 0.18461924 0.047389715 112.43506 37.618656 6534.7671 1.5393491e+10 0.18495913 0.048159151 112.49971 37.503205 6536.6897 1.4196474e+10 0.18374791 0.048407598 112.55629 37.397586 6538.6123 1.3189379e+10 0.18254572 0.049454833 112.61287 37.291967 6540.5349 1.2215696e+10 0.18073078 0.051106790 112.67509 37.178832 6542.4575 1.1227399e+10 0.17740291 0.051175914 112.73976 37.062436 6544.3800 1.0249910e+10 0.17406775 0.051952643 112.80137 36.950110 6546.3026 9.4734498e+09 0.17061660 0.052713536 112.85795 36.844491 6548.2252 8.8438939e+09 0.16820316 0.053734900 112.91453 36.738872 6550.1478 8.2859012e+09 0.16622894 0.055022365 112.97699 36.622288 6552.0704 7.7060104e+09 0.16393901 0.055569053 113.04166 36.501579 6553.9930 7.1359872e+09 0.16094745 0.054835920 113.10303 36.387013 6555.9155 6.6462657e+09 0.15833764 0.054084091 113.15961 36.281396 6557.8381 6.2117374e+09 0.15606832 0.053340768 113.21619 36.175778 6559.7607 5.7991290e+09 0.15311739 0.052301319 113.27888 36.062011 6561.6833 5.3669303e+09 0.14988342 0.051035970 113.34355 35.945613 6563.6059 4.9376140e+09 0.14678730 0.049227508 113.40468 35.833918 6565.5285 4.5854106e+09 0.14415093 0.047718325 113.46127 35.728299 6567.4510 4.2934455e+09 0.14175896 0.046235819 113.51785 35.622680 6569.3736 4.0202202e+09 0.13921507 0.044876742 113.57739 35.505212 6571.2962 3.7456451e+09 0.13700135 0.044422374 113.63775 35.384503 6573.2188 3.4826557e+09 0.13455478 0.043481905 113.69459 35.272578 6575.1414 3.2639138e+09 0.13185781 0.042232862 113.74740 35.170731 6577.0640 3.0793724e+09 0.12871405 0.040119905 113.80021 35.068885 6578.9865 2.9053665e+09 0.12502592 0.037091746 113.86267 34.951674 6580.9091 2.7097668e+09 0.12207542 0.035680588 113.92734 34.830966 6582.8317 2.5201050e+09 0.11957636 0.035067463 113.98614 34.717727 6584.7543 2.3627960e+09 0.11664791 0.034104618 114.03894 34.612109 6586.6769 2.2289678e+09 0.11373741 0.033162546 114.09175 34.506492 6588.5995 2.1047274e+09 0.11139130 0.033179738 114.15093 34.391777 6590.5220 1.9711066e+09 0.10906176 0.030090980 114.21128 34.275378 6592.4446 1.8398826e+09 0.10706312 0.027641655 114.26571 34.164631 6594.3672 1.7344449e+09 0.10494188 0.025970941 114.31475 34.059012 6596.2898 1.6418586e+09 0.10246324 0.025725956 114.36378 33.953393 6598.2124 1.5550371e+09 0.10078564 0.025305767 114.42270 33.834598 6600.1350 1.4563587e+09 0.10032257 0.025267336 114.48306 33.713889 6602.0575 1.3645302e+09 0.099833088 0.027467525 114.53923 33.603622 6603.9801 1.2927493e+09 0.098340722 0.026083039 114.59204 33.501776 6605.9027 1.2309832e+09 0.097992254 0.027422349 114.64485 33.399930 6607.8253 1.1681204e+09 0.096027494 0.024077342 114.70058 33.281061 6609.7479 1.0939981e+09 0.093356315 0.023928088 114.75662 33.160352 6611.6705 1.0284986e+09 0.090978809 0.024530897 114.80858 33.050638 6613.5930 9.7235219e+08 0.090040431 0.023791181 114.85762 32.948792 6615.5156 9.2941610e+08 0.088615138 0.023267396 114.90666 32.846946 6617.4382 8.8515242e+08 0.087563541 0.023584538 114.96222 32.727524 6619.3608 8.2898473e+08 0.086876312 0.024612969 115.01827 32.606815 6621.2834 7.8405342e+08 0.085925150 0.024995518 115.07233 32.497644 6623.2060 7.4095501e+08 0.084423275 0.024568134 115.12515 32.395783 6625.1286 7.0726862e+08 0.083067003 0.025551004 115.17797 32.293921 6627.0511 6.7581600e+08 0.080923251 0.025336563 115.22352 32.188447 6628.9737 6.4687299e+08 0.079856134 0.026098434 115.26879 32.082828 6630.8963 6.1954669e+08 0.078374478 0.025930510 115.31740 31.973863 6632.8189 5.9086287e+08 0.077401049 0.026130536 115.37344 31.857466 6634.7415 5.6240408e+08 0.076410263 0.026380929 115.42948 31.741073 6636.6641 5.3371797e+08 0.075351165 0.026291874 115.47859 31.639089 6638.5866 5.1383510e+08 0.074658564 0.025646084 115.52762 31.537243 6640.5092 4.9226823e+08 0.075229028 0.025208348 115.57904 31.428988 6642.4318 4.6800750e+08 0.075337777 0.025169366 115.63509 31.308279 6644.3544 4.4465133e+08 0.074581925 0.025381908 115.69091 31.187950 6646.2770 4.2178077e+08 0.073808955 0.026063516 115.73618 31.086104 6648.1996 3.9927263e+08 0.073069401 0.027097866 115.78144 30.984258 6650.1221 3.8408354e+08 0.072539657 0.026283198 115.83068 30.875450 6652.0447 3.6579279e+08 0.072079768 0.027262825 115.88673 30.754741 6653.9673 3.4955696e+08 0.071483845 0.028019532 115.94224 30.634964 6655.8899 3.3407493e+08 0.069904616 0.027977920 115.98750 30.533119 6657.8125 3.1878828e+08 0.068537680 0.029843552 116.03277 30.431274 6659.7351 3.0607456e+08 0.067117365 0.031681265 116.08061 30.323631 6661.6576 2.8980998e+08 0.065690546 0.032869899 116.13234 30.207233 6663.5802 2.6885078e+08 0.064410919 0.032322419 116.18356 30.091684 6665.5028 2.4455365e+08 0.064081825 0.027723265 116.22883 29.986065 6667.4254 2.2334632e+08 0.063360155 0.027259711 116.27410 29.880446 6669.3480 2.0373862e+08 0.062124177 0.027998310 116.32213 29.770217 6671.2706 1.9048730e+08 0.061868683 0.026869204 116.37386 29.653819 6673.1931 1.7820531e+08 0.061216693 0.027748073 116.42489 29.538994 6675.1157 1.7003356e+08 0.059587324 0.030020010 116.47016 29.437148 6677.0383 1.5680148e+08 0.057442677 0.032303760 116.51542 29.335303 6678.9609 1.4909519e+08 0.056760161 0.030293929 116.56364 29.226807 6680.8835 1.4167304e+08 0.057634879 0.029632196 116.61538 29.110409 6682.8061 1.3426710e+08 0.058099479 0.031040402 116.66622 28.996010 6684.7286 1.2990406e+08 0.058015726 0.032691067 116.71148 28.894163 6686.6512 1.2163114e+08 0.056670477 0.034139977 116.75675 28.792317 6688.5738 1.1752786e+08 0.054296793 0.033917645 116.80306 28.681297 6690.4964 1.1807577e+08 0.053362972 0.033058977 116.85048 28.560588 6692.4190 1.1463925e+08 0.052625530 0.032278797 116.89754 28.443023 6694.3416 1.1338051e+08 0.052094481 0.030782313 116.94281 28.341178 6696.2641 1.0975880e+08 0.052062695 0.029785532 116.98808 28.239332 6698.1867 1.0271214e+08 0.051242774 0.030474121 117.03668 28.129983 6700.1093 1.0125828e+08 0.050105423 0.030748797 117.08841 28.013585 6702.0319 95744866. 0.048660326 0.032902198 117.13929 27.897187 6703.9545 95099904. 0.049365816 0.036063642 117.18671 27.780789 6705.8771 94417298. 0.049760896 0.038227844 117.23413 27.664391 6707.7996 90798378. 0.049630207 0.040072278 117.27636 27.560746 6709.7222 84853313. 0.048701901 0.040673171 117.31785 27.458899 6711.6448 78039360. 0.046742791 0.041425852 117.36068 27.353774 6713.5674 71323229. 0.044652968 0.045738772 117.40810 27.237377 6715.4900 68362924. 0.043044677 0.047879725 117.45553 27.120980 6717.4126 67683130. 0.041329037 0.049848750 117.50100 27.017761 6719.3351 70521572. 0.039901909 0.051051425 117.54626 26.915915 6721.2577 69147942. 0.040008205 0.050381554 117.59208 26.810364 6723.1803 63092445. 0.037695559 0.049469508 117.63950 26.693966 6725.1029 58157962. 0.031888892 0.041511745 117.68692 26.577568 6727.0255 52146112. 0.026959423 0.040926439 117.73434 26.461170 6728.9481 51792293. 0.022638787 0.040971817 117.78176 26.344772 6730.8706 49026029. 0.010432723 0.041572667 117.82321 26.237329 6732.7932 48085859. -0.046677616 0.043886240 117.86093 26.135483 6734.7158 49055428. -0.0018022314 0.049310531 117.89865 26.033637 6736.6384 49255424. 0.093391814 0.052768509 117.94573 25.917758