# # 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 = 40.434449 km # Date (UTC) = 2017-01-17T10:20:37.287 # Date (julian) = 2457770.93098712 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6500.1858 8.1941412e+10 0.047329962 0.032339251 99.258736 40.329138 6502.5491 7.0677440e+10 0.057355569 0.033051878 99.348824 40.180764 6504.9123 6.1470437e+10 0.067651746 0.033764505 99.437210 40.032389 6507.2756 5.3899416e+10 0.078301650 0.034477132 99.521994 39.884012 6509.6388 4.7483926e+10 0.089314150 0.035189759 99.609077 39.735637 6512.0020 4.1716128e+10 0.10062965 0.035902386 99.699161 39.587262 6514.3653 3.7008599e+10 0.11245309 0.036615013 99.780554 39.449028 6516.7285 3.3272670e+10 0.12490929 0.037327640 99.854742 39.319203 6519.0917 3.0181331e+10 0.13793363 0.038040267 99.935128 39.182144 6521.4550 2.7279405e+10 0.15134364 0.038752894 100.02521 39.033768 6523.8182 2.4364925e+10 0.15972272 0.039381899 100.11263 38.885393 6526.1814 2.1716824e+10 0.16582245 0.039858288 100.19742 38.737019 6528.5447 1.9408181e+10 0.17193416 0.041874561 100.28221 38.591906 6530.9079 1.7340768e+10 0.17613357 0.045099729 100.36699 38.448830 6533.2711 1.5630991e+10 0.18045457 0.047634808 100.44067 38.315409 6535.6344 1.4189716e+10 0.18124588 0.047949114 100.51022 38.185584 6537.9976 1.2986202e+10 0.18197293 0.049155547 100.58849 38.045150 6540.3608 1.1835033e+10 0.18050769 0.051024567 100.67327 37.896773 6542.7241 1.0694471e+10 0.17666737 0.051277133 100.75443 37.748398 6545.0873 9.6671850e+09 0.17311545 0.052456349 100.83391 37.600024 6547.4505 8.7208880e+09 0.16931979 0.053458693 100.91763 37.451649 6549.8138 7.8973969e+09 0.16653713 0.054795572 101.00242 37.303275 6552.1770 7.2017898e+09 0.16389574 0.055542216 101.07333 37.171789 6554.5402 6.6276988e+09 0.16077868 0.054843717 101.14288 37.041962 6556.9035 6.1280620e+09 0.15777657 0.053880299 101.21992 36.902150 6559.2667 5.6336724e+09 0.15418823 0.052357078 101.29940 36.759076 6561.6299 5.1166881e+09 0.15076674 0.051062262 101.37889 36.611406 6563.9932 4.6428330e+09 0.14710610 0.048779497 101.45838 36.463029 6566.3564 4.2596614e+09 0.14427485 0.046981267 101.52359 36.332825 6568.7196 3.9487099e+09 0.14154973 0.045110143 101.58850 36.203001 6571.0829 3.6649873e+09 0.13904147 0.044480641 101.66540 36.057913 6573.4461 3.3742870e+09 0.13621226 0.043299491 101.74489 35.909538 6575.8093 3.1128755e+09 0.13293534 0.041562684 101.81074 35.782859 6578.1726 2.8912112e+09 0.12938616 0.038377097 101.87565 35.657670 6580.5358 2.6916114e+09 0.12559505 0.036025587 101.95192 35.514418 6582.8990 2.4917819e+09 0.12232472 0.035049139 102.03141 35.366042 6585.2623 2.2734886e+09 0.11907773 0.033761087 102.10617 35.217667 6587.6255 2.0853947e+09 0.11594711 0.033296959 102.18031 35.069381 6589.9887 1.9404050e+09 0.11241067 0.031084393 102.24522 34.939556 6592.3520 1.8114353e+09 0.10820623 0.027731645 102.31013 34.809731 6594.7152 1.6950334e+09 0.10432709 0.025779905 102.38291 34.668669 6597.0784 1.5674748e+09 0.10076679 0.025697971 102.45710 34.525593 6599.4417 1.4510639e+09 0.098894831 0.024956295 102.52238 34.395231 6601.8049 1.3595308e+09 0.098709375 0.027424761 102.58731 34.265387 6604.1682 1.2726696e+09 0.097428614 0.026171120 102.65542 34.124897 6606.5314 1.1869588e+09 0.097000683 0.026549079 102.72431 33.981821 6608.8946 1.1046597e+09 0.094173777 0.023708718 102.78955 33.850900 6611.2579 1.0337777e+09 0.091309353 0.024794021 102.85447 33.721074 6613.6211 9.7127769e+08 0.090362510 0.023801469 102.92240 33.577139 6615.9843 9.1038231e+08 0.088849036 0.023281816 102.99129 33.428764 6618.3476 8.4196379e+08 0.088402768 0.024033243 103.06018 33.285018 6620.7108 7.7756734e+08 0.087779005 0.024996249 103.12906 33.141947 6623.0740 7.2608944e+08 0.086348794 0.024519251 103.18946 33.011937 6625.4373 6.8475135e+08 0.084874497 0.025919386 103.24974 32.882112 6627.8005 6.4783753e+08 0.082961290 0.025626029 103.32155 32.741292 6630.1637 6.0932037e+08 0.081538127 0.025928705 103.39574 32.598216 6632.5270 5.6949092e+08 0.079833349 0.026095532 103.45244 32.467631 6634.8902 5.3912385e+08 0.078268064 0.026391778 103.50808 32.337806 6637.2534 5.1226529e+08 0.076620905 0.026037289 103.57413 32.197568 6639.6167 4.8228175e+08 0.075986664 0.025407665 103.64302 32.054492 6641.9799 4.5346975e+08 0.076243189 0.025151628 103.70417 31.923324 6644.3431 4.2375742e+08 0.075109032 0.025380691 103.76445 31.793497 6646.7064 4.0119097e+08 0.073921088 0.026285786 103.83111 31.653840 6649.0696 3.7846788e+08 0.072746959 0.027537745 103.90001 31.510764 6651.4328 3.5425656e+08 0.072680134 0.026815872 103.96436 31.363158 6653.7961 3.3375480e+08 0.072458656 0.027932106 104.02795 31.214782 6656.1593 3.1540837e+08 0.070990969 0.028163238 104.08385 31.088847 6658.5225 3.0230901e+08 0.069679924 0.030987811 104.13949 30.963659 6660.8858 2.8951261e+08 0.068460863 0.032431122 104.20587 30.819665 6663.2490 2.7579338e+08 0.067406165 0.032414207 104.27476 30.671290 6665.6122 2.5934823e+08 0.067272290 0.027543952 104.33141 30.544336 6667.9755 2.3873475e+08 0.066924206 0.027461767 104.38705 30.419147 6670.3387 2.2101010e+08 0.066638942 0.027171714 104.44878 30.280236 6672.7019 2.0041242e+08 0.066649606 0.027286458 104.51237 30.137161 6675.0652 1.8630423e+08 0.065357015 0.029923196 104.56896 30.005746 6677.4284 1.7542720e+08 0.063534229 0.031749186 104.62460 29.875921 6679.7916 1.6331581e+08 0.063741149 0.029613590 104.68600 29.736511 6682.1549 1.5518611e+08 0.064771364 0.030542877 104.74959 29.593435 6684.5181 1.4097021e+08 0.065173924 0.032680384 104.81317 29.450358 6686.8813 1.3522595e+08 0.063835946 0.034273867 104.87676 29.307282 6689.2446 1.2814470e+08 0.061131124 0.033795860 104.92840 29.181183 6691.6078 1.2382841e+08 0.060233820 0.032857858 104.97941 29.055994 6693.9711 1.2029745e+08 0.059269639 0.031270958 105.04038 28.912434 6696.3343 1.1309927e+08 0.059247578 0.029814674 105.10398 28.764058 6698.6975 1.0841441e+08 0.058221750 0.031175243 105.16277 28.620480 6701.0608 99950145. 0.056519650 0.031498589 105.22101 28.477729 6703.4240 95148895. 0.056585503 0.034736188 105.27665 28.352540 6705.7872 90756939. 0.056950326 0.038068128 105.33228 28.227351 6708.1505 84852972. 0.056917718 0.040207420 105.39021 28.086754 6710.5137 78512994. 0.055792722 0.040597043 105.44850 27.943678 6712.8769 72505427. 0.053978532 0.043458115 105.50679 27.800602 6715.2402 66235233. 0.052227714 0.047624216 105.56485 27.659085 6717.6034 61146057. 0.050408221 0.049836946 105.62049 27.533897 6719.9666 55505053. 0.049426795 0.050451473 105.67613 27.408708 6722.3299 55180965. 0.049551922 0.050197409 105.73424 27.266876 6724.6931 55111328. 0.046130919 0.044138866 105.79253 27.123800 6727.0563 50409755. 0.044189010 0.040885339 105.85082 26.980725 6729.4196 48067402. 0.044022982 0.040765777 105.90911 26.836822 6731.7828 46605030. 0.042615799 0.043307938 105.96740 26.688446 6734.1460 50043384. 0.041578932 0.049344813 106.02373 26.546311 6736.5093 50750699. 0.044624130 0.052280319 106.07473 26.421121 6738.8725 48971193. 0.044532841 0.062124611 106.12596 26.293921 6741.2357 46149150. 0.040931389 0.066431021 106.17895 26.150846