# # 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 = 39.735256 km # Date (UTC) = 2011-01-20T08:41:11.568 # Date (julian) = 2455581.86193944 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6508.0792 8.8089087e+10 0.086706193 0.034719475 115.96290 51.068064 6510.8453 7.2653360e+10 0.099146043 0.035553582 116.12093 50.898230 6513.6114 6.0798818e+10 0.11182701 0.036387689 116.30184 50.710085 6516.3775 5.1662142e+10 0.12486774 0.037221796 116.46378 50.537114 6519.1436 4.4209441e+10 0.13822956 0.038055903 116.62198 50.367135 6521.9097 3.8350385e+10 0.15202895 0.038890010 116.80289 50.178990 6524.6758 3.3423833e+10 0.15913568 0.039667024 116.96010 50.006140 6527.4418 2.9344031e+10 0.16436667 0.041037252 117.10895 49.839464 6530.2079 2.6261602e+10 0.16875608 0.044119795 117.25782 49.678199 6532.9740 2.3464516e+10 0.17193440 0.047497883 117.41573 49.499362 6535.7401 2.0868632e+10 0.17227342 0.047903240 117.57900 49.308525 6538.5062 1.8486300e+10 0.17366672 0.049403173 117.72165 49.147261 6541.2723 1.6499154e+10 0.17365145 0.051238228 117.86431 48.982766 6544.0384 1.4915224e+10 0.17285670 0.051675481 118.00696 48.815299 6546.8045 1.3519051e+10 0.17224434 0.053126473 118.14962 48.647833 6549.5706 1.2298962e+10 0.17054011 0.054547724 118.29044 48.482206 6552.3366 1.1136988e+10 0.16792758 0.055502033 118.42690 48.320943 6555.1027 9.9829928e+09 0.16338678 0.054767041 118.57891 48.136339 6557.8688 8.8834340e+09 0.15758254 0.053321524 118.73124 47.949393 6560.6349 7.9018246e+09 0.15131737 0.051701851 118.86769 47.781927 6563.4010 7.0935127e+09 0.14613023 0.049464496 118.99987 47.618741 6566.1671 6.4335180e+09 0.14236308 0.047088359 119.13060 47.456996 6568.9332 5.8391776e+09 0.13974806 0.044913843 119.26705 47.289530 6571.6993 5.3036048e+09 0.13774985 0.044312290 119.39773 47.122064 6574.4654 4.8191145e+09 0.13487011 0.042631492 119.52178 46.954598 6577.2315 4.3911552e+09 0.13195738 0.039856814 119.65112 46.787132 6579.9975 4.0076976e+09 0.12877023 0.036522103 119.78137 46.621166 6582.7636 3.6566158e+09 0.12585126 0.035085989 119.91159 46.459932 6585.5297 3.3482329e+09 0.12296354 0.033547272 120.03794 46.294782 6588.2958 3.0632242e+09 0.12048100 0.033281143 120.16199 46.127315 6591.0619 2.8105210e+09 0.11701169 0.029132061 120.28604 45.959849 6593.8280 2.5801311e+09 0.11377236 0.026332440 120.40758 45.792383 6596.5941 2.3735895e+09 0.10997576 0.025724573 120.52543 45.624917 6599.3602 2.1870101e+09 0.10731399 0.024951393 120.64819 45.462361 6602.1263 2.0178002e+09 0.10619623 0.027408888 120.77112 45.299987 6604.8924 1.8595454e+09 0.10416283 0.026601124 120.88897 45.132521 6607.6584 1.7114741e+09 0.10139228 0.024406825 121.00681 44.965055 6610.4245 1.5760561e+09 0.096705299 0.024408607 121.12466 44.797588 6613.1906 1.4505540e+09 0.093918923 0.023643529 121.24251 44.630122 6615.9567 1.3415503e+09 0.091063616 0.023280967 121.35823 44.464780 6618.7228 1.2393354e+09 0.089419846 0.024316594 121.46987 44.303515 6621.4889 1.1476256e+09 0.087951801 0.024927403 121.58605 44.137724 6624.2550 1.0662157e+09 0.085915027 0.024998798 121.70316 43.970260 6627.0211 9.9086087e+08 0.084250867 0.025324948 121.81481 43.802794 6629.7872 9.2234804e+08 0.083455716 0.025966784 121.92645 43.635328 6632.5532 8.5481817e+08 0.081986064 0.026098684 122.03810 43.467862 6635.3193 7.9223386e+08 0.080684681 0.026447677 122.14974 43.300396 6638.0854 7.3788251e+08 0.079589632 0.025667921 122.25964 43.134673 6640.8515 6.8714753e+08 0.080053704 0.025166468 122.36508 42.973407 6643.6176 6.3792461e+08 0.079639657 0.025285869 122.47052 42.807996 6646.3837 5.8814736e+08 0.078632559 0.026118760 122.57631 42.640533 6649.1498 5.4471131e+08 0.077426378 0.027427218 122.68796 42.473067 6651.9159 5.0472641e+08 0.077113928 0.027186050 122.79684 42.305601 6654.6820 4.6818699e+08 0.076141742 0.027745703 122.90228 42.138135 6657.4481 4.3357997e+08 0.073922585 0.029420838 123.00257 41.970669 6660.2141 4.0074241e+08 0.072097810 0.031820643 123.10317 41.804566 6662.9802 3.7437446e+08 0.070247343 0.032494304 123.20861 41.643303 6665.7463 3.4936927e+08 0.069305101 0.027324256 123.31029 41.478272 6668.5124 3.2619873e+08 0.067850439 0.027924222 123.40954 41.310806 6671.2785 3.0345091e+08 0.067149395 0.026869317 123.51494 41.143340 6674.0446 2.8492017e+08 0.065711599 0.028992406 123.61800 40.975874 6676.8107 2.6663441e+08 0.062346490 0.032236203 123.71724 40.808408 6679.5768 2.5015011e+08 0.061321701 0.029791155 123.81170 40.645721 6682.3429 2.3329333e+08 0.061748044 0.030686501 123.90572 40.483475 6685.1089 2.1936015e+08 0.061186985 0.032819915 124.00496 40.316011 6687.8750 2.0339443e+08 0.058143994 0.033854882 124.10420 40.148546 6690.6411 1.8873044e+08 0.055270210 0.033042390 124.20343 39.981079 6693.4072 1.7637697e+08 0.053499611 0.031464388 124.29688 39.819404 6696.1733 1.6241229e+08 0.052307809 0.029747791 124.38992 39.656145 6698.9394 1.5235257e+08 0.050284740 0.031507248 124.48296 39.488679 6701.7055 1.4037355e+08 0.047403275 0.032444596 124.58039 39.321213 6704.4716 1.2948477e+08 0.046961786 0.036409122 124.67842 39.153748 6707.2377 1.2304359e+08 0.046277816 0.040152781 124.76526 38.986284 6710.0038 1.1409847e+08 0.044582004 0.040497230 124.85510 38.821825 6712.7698 1.0802339e+08 0.041663268 0.043259304 124.94814 38.660559 6715.5359 1.0103563e+08 0.038742594 0.047926727 125.04118 38.493884 6718.3020 92490694. 0.035330103 0.050282794 125.13260 38.326418 6721.0681 83791192. 0.033992410 0.050324422 125.21943 38.158952 6723.8342 75098555. 0.030783071 0.049834194 125.31029 37.995506 6726.6003 69871208. 0.025314225 0.040956781 125.40310 37.834022 6729.3664 66668883. 0.023202112 0.040801224 125.48993 37.666556 6732.1325 66276596. 0.019505596 0.043764597 125.57677 37.499090 6734.8986 62407397. 0.014594242 0.049299536 125.66360 37.331623 6737.6647 58936681. 0.0058496529 0.056252831 125.75044 37.169189 6740.4307 58438858. -0.054490998 0.064786210 125.83727 37.006693 6743.1968 57722880. -0.0079849893 0.072375259 125.92410 36.839227 6745.9629 57372025. 0.099781059 0.078971690 126.00730 36.675399