# # 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 = 38.221710 km # Date (UTC) = 2016-12-03T09:04:38.468 # Date (julian) = 2457725.87822301 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6492.8432 1.2403105e+11 0.032400766 0.030125108 -12.652929 55.560363 6495.1818 1.0758663e+11 0.040443071 0.030830304 -12.798986 55.463629 6497.5204 9.3396160e+10 0.048051565 0.031535500 -12.954987 55.358097 6499.8590 8.0563266e+10 0.055216639 0.032240696 -13.109480 55.253391 6502.1976 7.0177692e+10 0.061923456 0.032945892 -13.244068 55.159588 6504.5362 6.1524795e+10 0.068366070 0.033651088 -13.378655 55.065785 6506.8748 5.4547409e+10 0.074890874 0.034356284 -13.513253 54.971974 6509.2134 4.8738408e+10 0.081804147 0.035061481 -13.647858 54.878159 6511.5520 4.3450341e+10 0.089389939 0.035766677 -13.784502 54.782388 6513.8906 3.8308147e+10 0.097745482 0.036471873 -13.931327 54.676858 6516.2292 3.3532302e+10 0.10703826 0.037177069 -14.078139 54.571338 6518.5678 2.9352864e+10 0.11757955 0.037882265 -14.208865 54.477378 6520.9063 2.6094070e+10 0.12981510 0.038587461 -14.339374 54.383575 6523.2449 2.3521585e+10 0.14036318 0.039239819 -14.469883 54.287587 6525.5835 2.1331734e+10 0.14889517 0.039715618 -14.600392 54.189705 6527.9221 1.9365132e+10 0.15799270 0.041385940 -14.731880 54.091184 6530.2607 1.7420705e+10 0.16636180 0.044193684 -14.874117 53.985654 6532.5993 1.5590737e+10 0.17346316 0.047184844 -15.016353 53.880124 6534.9379 1.3906986e+10 0.17767085 0.048206922 -15.140628 53.785184 6537.2765 1.2554174e+10 0.17872986 0.048815576 -15.262996 53.691369 6539.6151 1.1453930e+10 0.17823294 0.050388161 -15.387202 53.595714 6541.9537 1.0553942e+10 0.17568728 0.051017263 -15.513633 53.497833 6544.2923 9.7353840e+09 0.17320472 0.051881434 -15.640098 53.399913 6546.6309 8.9171483e+09 0.17105171 0.052983615 -15.773127 53.294417 6548.9694 8.1300769e+09 0.16872944 0.053957155 -15.906186 53.188885 6551.3080 7.3932769e+09 0.16708452 0.055343876 -16.030455 53.089635 6553.6466 6.7998826e+09 0.16507619 0.055010017 -16.152806 52.991754 6555.9852 6.2651360e+09 0.16253035 0.054025546 -16.273653 52.895379 6558.3238 5.7965931e+09 0.16033128 0.052963379 -16.391927 52.801576 6560.6624 5.3698279e+09 0.15712978 0.051677069 -16.510201 52.707773 6563.0010 4.9259902e+09 0.15420808 0.049927218 -16.642054 52.598990 6565.3396 4.5125866e+09 0.15125563 0.047932794 -16.775133 52.488854 6567.6782 4.1133546e+09 0.14872939 0.046043772 -16.894276 52.390772 6570.0168 3.7913446e+09 0.14632048 0.044910563 -17.008471 52.296969 6572.3554 3.5247563e+09 0.14323822 0.044026650 -17.122667 52.202000 6574.6940 3.2799794e+09 0.13958828 0.042521702 -17.236862 52.104119 6577.0325 3.0567996e+09 0.13559187 0.040169254 -17.351058 52.006238 6579.3711 2.8284116e+09 0.13098881 0.036866468 -17.473334 51.898149 6581.7097 2.6031660e+09 0.12683978 0.035381694 -17.597216 51.788030 6584.0483 2.3950989e+09 0.12242970 0.034489190 -17.714757 51.688592 6586.3869 2.2112824e+09 0.11827899 0.033166295 -17.828953 51.594789 6588.7255 2.0637679e+09 0.11472242 0.033137647 -17.941498 51.500156 6591.0641 1.9388911e+09 0.11109244 0.029129587 -18.047550 51.402261 6593.4027 1.8249834e+09 0.10846260 0.026727845 -18.153603 51.304366 6595.7413 1.7092582e+09 0.10554250 0.025700444 -18.273048 51.197291 6598.0799 1.5891276e+09 0.10340309 0.025369033 -18.396931 51.087173 6600.4185 1.4668794e+09 0.10277887 0.025850153 -18.510614 50.984050 6602.7571 1.3544468e+09 0.10197067 0.026870595 -18.616652 50.886167 6605.0956 1.2732068e+09 0.10097208 0.026745281 -18.722690 50.788773 6607.4342 1.1963979e+09 0.099189158 0.024849543 -18.828728 50.694970 6609.7728 1.1311381e+09 0.095795130 0.023935498 -18.934767 50.601167 6612.1114 1.0636993e+09 0.093083800 0.024237503 -19.046593 50.496470 6614.4500 9.9389146e+08 0.091859212 0.023630452 -19.161300 50.386352 6616.7886 9.2673412e+08 0.090207361 0.023406070 -19.271781 50.282203 6619.1272 8.6819676e+08 0.089235113 0.024556604 -19.377834 50.184308 6621.4658 8.1647603e+08 0.087996968 0.024935060 -19.484035 50.085964 6623.8044 7.6054395e+08 0.085873267 0.024789835 -19.594154 49.975845 6626.1430 7.0495637e+08 0.084351059 0.026408747 -19.704273 49.865725 6628.4816 6.5536435e+08 0.082381285 0.025898614 -19.807398 49.766097 6630.8202 6.1785887e+08 0.080293139 0.025930323 -19.909357 49.668216 6633.1587 5.8509364e+08 0.078451403 0.026179968 -20.009665 49.570335 6635.4973 5.5195848e+08 0.076424700 0.026474371 -20.107546 49.472453 6637.8359 5.1658857e+08 0.074912587 0.025751999 -20.205427 49.374571 6640.1745 4.8101122e+08 0.074781802 0.025249299 -20.314975 49.265024 6642.5131 4.4850944e+08 0.074965400 0.025172694 -20.425095 49.154906 6644.8517 4.1956577e+08 0.074387090 0.025435657 -20.525755 49.054247 6647.1903 3.9661689e+08 0.073565321 0.026537971 -20.623649 48.956351 6649.5289 3.7365513e+08 0.072921915 0.026904643 -20.724004 48.854518 6651.8675 3.5176062e+08 0.072789352 0.027148963 -20.829534 48.744401 6654.2061 3.2890891e+08 0.072353841 0.027948438 -20.933390 48.636030 6656.5447 3.1108237e+08 0.070654096 0.028501465 -21.027193 48.538147 6658.8833 2.8943291e+08 0.069235755 0.031627548 -21.120995 48.440265 6661.2218 2.6916483e+08 0.068037027 0.032647940 -21.222900 48.333929 6663.5604 2.5342580e+08 0.066772993 0.032327902 -21.328430 48.223809 6665.8990 2.3965582e+08 0.066621667 0.027074039 -21.427965 48.119948 6668.2376 2.3141976e+08 0.065705863 0.027681052 -21.521768 48.022067 6670.5762 2.1642606e+08 0.065285356 0.027061682 -21.615997 47.923459 6672.9148 2.0084041e+08 0.064893318 0.027409836 -21.716953 47.813323 6675.2534 1.8457390e+08 0.063054785 0.030283704 -21.817910 47.703188 6677.5920 1.7511809e+08 0.061059496 0.031516645 -21.908980 47.603839 6679.9306 1.6767815e+08 0.060923283 0.029498782 -21.998704 47.505959 6682.2692 1.6259728e+08 0.061478885 0.030630200 -22.093233 47.402836 6684.6078 1.5384669e+08 0.061326746 0.032684933 -22.194176 47.292717 6686.9464 1.4080474e+08 0.059504218 0.034311688 -22.293976 47.181456 6689.2849 1.2712439e+08 0.056391117 0.033759527 -22.390330 47.066749 6691.6235 1.1836083e+08 0.055143146 0.032854149 -22.486224 46.953209 6693.9621 1.1475817e+08 0.054015190 0.031274019 -22.575949 46.855328 6696.3007 1.1041930e+08 0.053844368 0.029800729 -22.665674 46.757448 6698.6393 1.0567049e+08 0.052724383 0.031095348 -22.759492 46.652011 6700.9779 98216336. 0.050700214 0.031393058 -22.855845 46.541891 6703.3165 92461484. 0.050395653 0.034467211 -22.950189 46.431773 6705.6551 87162324. 0.050406692 0.037833221 -23.041955 46.321655 6707.9937 80595958. 0.049880105 0.040044483 -23.132142 46.214697 6710.3323 71982643. 0.048010346 0.040561533 -23.217800 46.116801 6712.6709 68748017. 0.045485303 0.043075529 -23.303457 46.018906 6715.0095 66361251. 0.042792100 0.047388259 -23.394043 45.911147 6717.3480 63760630. 0.039332245 0.049852740 -23.485809 45.801028 6719.6866 61791898. 0.034246521 0.050717482 -23.577574 45.690910 6722.0252 56997952. 0.011068755 0.050574012 -23.669339 45.580792 6724.3638 55194225. 0.027669381 0.046888510 -23.761104 45.468619 6726.7024 53284325. 0.067729677 0.040957702 -23.852870 45.353913