# # 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 = 31.892897 km # Date (UTC) = 2017-01-20T10:40:47.799 # Date (julian) = 2457773.94499768 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6505.9629 5.4894968e+10 0.078314852 0.034081302 -37.316194 54.381689 6507.6462 5.1873502e+10 0.086979510 0.034588893 -37.425652 54.283553 6509.3295 4.8361877e+10 0.095661646 0.035096484 -37.535287 54.185592 6511.0127 4.5171296e+10 0.10453189 0.035604074 -37.648521 54.091231 6512.6960 4.1953914e+10 0.11350468 0.036111665 -37.761756 53.996870 6514.3793 3.8930894e+10 0.12263166 0.036619255 -37.878990 53.894509 6516.0626 3.5761926e+10 0.13178858 0.037126846 -38.002293 53.780015 6517.7459 3.2448993e+10 0.14094485 0.037634436 -38.123844 53.667589 6519.4292 2.9468973e+10 0.15021303 0.038142027 -38.233304 53.569452 6521.1125 2.6873815e+10 0.15960455 0.038649617 -38.342763 53.471316 6522.7958 2.4740162e+10 0.16693424 0.039125628 -38.450421 53.373180 6524.4790 2.2789044e+10 0.17193549 0.039597141 -38.556105 53.275045 6526.1623 2.1130290e+10 0.17508187 0.039838265 -38.661789 53.176910 6527.8456 1.9749285e+10 0.17948001 0.041330395 -38.767474 53.081898 6529.5289 1.8388737e+10 0.18218991 0.043078270 -38.873158 52.987536 6531.2122 1.7202352e+10 0.18352170 0.045537514 -38.978170 52.892502 6532.8955 1.6222163e+10 0.18552128 0.047432262 -39.080080 52.794367 6534.5788 1.5393293e+10 0.18521240 0.048106458 -39.181991 52.696232 6536.2620 1.4612805e+10 0.18305905 0.048024957 -39.292886 52.589444 6537.9453 1.3593301e+10 0.18257094 0.049130905 -39.411785 52.474948 6539.6286 1.2541288e+10 0.18116778 0.050404549 -39.525326 52.364674 6541.3119 1.1552185e+10 0.17868058 0.051225382 -39.623461 52.266538 6542.9952 1.0708544e+10 0.17674232 0.051380066 -39.721596 52.168403 6544.6785 1.0042192e+10 0.17474491 0.052194738 -39.819732 52.070267 6546.3618 9.2889626e+09 0.17217792 0.052762196 -39.917869 51.972130 6548.0450 8.6970212e+09 0.17043860 0.053681098 -40.016005 51.873994 6549.7283 8.0585059e+09 0.16861170 0.054708508 -40.114141 51.775859 6551.4116 7.3926328e+09 0.16641225 0.055380235 -40.212276 51.677724 6553.0949 6.9252604e+09 0.16442581 0.055287360 -40.309241 51.579588 6554.7782 6.2897107e+09 0.16246635 0.054848710 -40.403603 51.481451 6556.4615 5.8185820e+09 0.15980490 0.053945280 -40.497964 51.383314 6558.1448 5.3024596e+09 0.15772239 0.053115948 -40.594819 51.285179 6559.8281 4.8473688e+09 0.15536312 0.052293718 -40.692956 51.187044 6561.5113 4.6550523e+09 0.15181496 0.051120706 -40.790993 51.088909 6563.1946 4.5010119e+09 0.14852077 0.049703233 -40.881595 50.990773 6564.8779 4.4394163e+09 0.14518922 0.048373729 -40.972181 50.892638 6566.5612 4.3075432e+09 0.14170229 0.046865418 -41.064133 50.794502 6568.2445 4.0692476e+09 0.13896680 0.045546925 -41.158494 50.696366 6569.9278 3.7575320e+09 0.13672532 0.044912808 -41.252855 50.598229 6571.6111 3.3980893e+09 0.13421738 0.044336384 -41.344528 50.500094 6573.2943 3.1284628e+09 0.13153061 0.043421280 -41.435116 50.401959 6574.9776 3.0178139e+09 0.12879113 0.042385454 -41.525466 50.303823 6576.6609 2.8458479e+09 0.12616090 0.040610669 -41.612278 50.205686 6578.3442 2.7153198e+09 0.12370745 0.038106084 -41.699091 50.107550 6580.0275 2.4636639e+09 0.12214866 0.036495352 -41.787458 50.007859 6581.7108 2.2826237e+09 0.12021844 0.035381377 -41.878030 49.905967 6583.3941 2.2271363e+09 0.11814150 0.034822212 -41.968602 49.804074 6585.0773 2.1358352e+09 0.11634359 0.033908938 -42.056302 49.705050 6586.7606 2.1048969e+09 0.11403966 0.033161464 -42.143115 49.606915 6588.4439 2.0122534e+09 0.11228311 0.033231683 -42.229927 49.508779 6590.1272 1.9152904e+09 0.11031735 0.030825450 -42.316740 49.410643 6591.8105 1.8097131e+09 0.10800259 0.028287367 -42.403552 49.312506 6593.4938 1.7198191e+09 0.10586651 0.026643159 -42.488609 49.214371 6595.1771 1.6314148e+09 0.10363276 0.025641933 -42.571646 49.116236 6596.8603 1.5484570e+09 0.10121044 0.025723362 -42.654682 49.018101 6598.5436 1.4647867e+09 0.099377029 0.025147615 -42.740800 48.919965 6600.2269 1.3822880e+09 0.098829300 0.025456383 -42.827614 48.821830 6601.9102 1.3075857e+09 0.098025654 0.027474346 -42.913800 48.723067 6603.5935 1.2372235e+09 0.096508347 0.026311927 -42.996837 48.621157 6605.2768 1.1708683e+09 0.095833606 0.026897240 -43.079874 48.519246 6606.9601 1.1093581e+09 0.094443915 0.025778754 -43.160961 48.419286 6608.6434 1.0578230e+09 0.091666932 0.023715361 -43.240226 48.321149 6610.3266 9.9746697e+08 0.089196257 0.024315075 -43.319491 48.223012 6612.0099 9.4199818e+08 0.087373336 0.024313336 -43.402028 48.124877 6613.6932 8.8390206e+08 0.086804544 0.023827931 -43.485065 48.026742 6615.3765 8.2558955e+08 0.086092359 0.023263115 -43.567279 47.928607 6617.0598 7.8389394e+08 0.085372626 0.023459070 -43.646542 47.830470 6618.7431 7.3840788e+08 0.085132612 0.024331902 -43.725805 47.732334 6620.4264 6.9654753e+08 0.084901721 0.024904591 -43.805069 47.632051 6622.1096 6.5751236e+08 0.084157832 0.024728809 -43.884334 47.530140 6623.7929 6.2181201e+08 0.082870572 0.024785594 -43.963599 47.428230 6625.4762 5.9387267e+08 0.082216505 0.025965873 -44.039392 47.329790 6627.1595 5.6336618e+08 0.080652858 0.025378423 -44.114880 47.231655 6628.8428 5.3746308e+08 0.079939350 0.026045275 -44.191386 47.133520 6630.5261 5.0881164e+08 0.078846466 0.025929598 -44.270651 47.035385 6632.2094 4.8474275e+08 0.077655554 0.026057449 -44.349916 46.937250 6633.8926 4.6322551e+08 0.076462337 0.026308100 -44.426838 46.836772 6635.5759 4.4126059e+08 0.075345368 0.026486158 -44.502327 46.734862 6637.2592 4.1752123e+08 0.074291294 0.026034454 -44.577816 46.632951 6638.9425 3.9945618e+08 0.073239738 0.025630580 -44.653305 46.534705 6640.6258 3.7871926e+08 0.073672801 0.025194085 -44.728793 46.436568 6642.3091 3.6126431e+08 0.073325105 0.025164344 -44.803068 46.338431 6643.9924 3.4655789e+08 0.072102812 0.025342453 -44.874783 46.240296 6645.6757 3.2511103e+08 0.071096301 0.025768202 -44.946499 46.142161 6647.3589 3.0666389e+08 0.069902367 0.026626762 -45.020750 46.041488 6649.0422 2.8739984e+08 0.068540353 0.027575484 -45.096238 45.939578 6650.7255 2.7631451e+08 0.067997821 0.026421327 -45.171640 45.837754 6652.4088 2.6443007e+08 0.067328331 0.027362997 -45.243355 45.739619 6654.0921 2.5305707e+08 0.066319172 0.027996997 -45.315071 45.641484 6655.7754 2.3888029e+08 0.064525775 0.027930600 -45.386786 45.541939 6657.4587 2.1921873e+08 0.062741919 0.029433137 -45.458500 45.440028 6659.1419 2.0338730e+08 0.060880863 0.031804989 -45.530214 45.338118 6660.8252 1.9138582e+08 0.059306389 0.032376090 -45.593045 45.247824 6662.5085 1.8107068e+08 0.057745646 0.032758965 -45.652492 45.161956 6664.1918 1.7715812e+08 0.056335740 0.031504297 -45.711938 45.076088 6665.8751 1.6979033e+08 0.055976411 0.027113269 -45.779925 44.981680 6667.5584 1.6004146e+08 0.054919042 0.027308558 -45.851639 44.883544 6669.2417 1.4718634e+08 0.053272306 0.028107501 -45.923177 44.785233 6670.9249 1.3956241e+08 0.052922272 0.026900120 -45.991117 44.683322 6672.6082 1.3695589e+08 0.052569060 0.027232142 -46.059057 44.581412 6674.2915 1.3497008e+08 0.051709231 0.029200706 -46.126998 44.481002 6675.9748 1.2704746e+08 0.049523644 0.031665466 -46.194938 44.382865 6677.6581 1.1661691e+08 0.048051395 0.031422673 -46.262878 44.284728 6679.3414 1.0807282e+08 0.047287291 0.029985672 -46.330818 44.186593 6681.0247 1.0483201e+08 0.048182998 0.029676280 -46.398758 44.088458 6682.7080 1.0143621e+08 0.048715333 0.030965444 -46.466699 43.989951 6684.3912 96553010. 0.048444128 0.032673945 -46.534639 43.888040 6686.0745 94580550. 0.047883805 0.033804443 -46.602579 43.786130 6687.7578 87501829. 0.044974609 0.033920263 -46.668824 43.685915 6689.4411 85051608. 0.042180547 0.033618968 -46.732991 43.587780 6691.1244 77359082. 0.038579613 0.032971917 -46.797158 43.489644 6692.8077 73417947. 0.033654122 0.031827433 -46.864343 43.391507 6694.4910 66159333. 0.020987194 0.030572929 -46.932283 43.293371 6696.1742 62054478. -0.045667084 0.029748179 -46.999655 43.194667 6697.8575 60404887. 0.0070669313 0.030199787 -47.063820 43.092756 6699.5408 59249838. 0.12426381 0.031091416 -47.127985 42.990846