# # 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 = 44.026390 km # Date (UTC) = 2017-01-18T09:28:58.150 # Date (julian) = 2457771.89511747 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6510.7704 5.0025125e+10 0.10259163 0.035531004 112.41935 40.374607 6513.1308 4.4260297e+10 0.11408864 0.036242770 112.50932 40.226412 6515.4912 3.9504927e+10 0.12584338 0.036954535 112.59816 40.078217 6517.8516 3.5258150e+10 0.13778629 0.037666301 112.68284 39.930022 6520.2119 3.1470526e+10 0.14991923 0.038378067 112.76925 39.781826 6522.5723 2.8043885e+10 0.16063838 0.039067120 112.85923 39.633629 6524.9327 2.5217992e+10 0.16721591 0.039758307 112.94229 39.493496 6527.2931 2.2945009e+10 0.17171444 0.040929250 113.01640 39.363809 6529.6535 2.0981193e+10 0.17542712 0.043276686 113.09342 39.229008 6532.0138 1.9194130e+10 0.17869721 0.046695750 113.17810 39.080838 6534.3742 1.7385002e+10 0.17959951 0.048049240 113.26277 38.932657 6536.7346 1.5666989e+10 0.17962166 0.048447762 113.34745 38.784460 6539.0950 1.4173561e+10 0.17930837 0.049758591 113.43213 38.636264 6541.4554 1.2850210e+10 0.17815996 0.051178862 113.51682 38.488069 6543.8157 1.1667049e+10 0.17605304 0.051595985 113.59828 38.343092 6546.1761 1.0567148e+10 0.17345661 0.052609436 113.67767 38.200189 6548.5365 9.5276510e+09 0.17084021 0.053827860 113.76087 38.053482 6550.8969 8.5950347e+09 0.16699536 0.055209927 113.84555 37.905287 6553.2572 7.8352758e+09 0.16314155 0.055205753 113.91762 37.772440 6555.6176 7.2299741e+09 0.15875197 0.054334413 113.98710 37.642750 6557.9780 6.7056784e+09 0.15520848 0.053253092 114.06321 37.500673 6560.3384 6.1959897e+09 0.15172288 0.051969215 114.14259 37.352503 6562.6988 5.6735390e+09 0.14833728 0.050215007 114.22198 37.204313 6565.0591 5.1940994e+09 0.14536197 0.048251244 114.30136 37.056118 6567.4195 4.7479698e+09 0.14271163 0.046262475 114.38075 36.907921 6569.7799 4.3642344e+09 0.14054531 0.044903184 114.46009 36.759851 6572.1403 4.0440271e+09 0.13827412 0.044149824 114.52960 36.634712 6574.5007 3.7625272e+09 0.13539071 0.042614543 114.59908 36.509658 6576.8610 3.5159858e+09 0.13250633 0.040380327 114.67245 36.365098 6579.2214 3.2646347e+09 0.12904667 0.036948778 114.74655 36.216900 6581.5818 3.0054054e+09 0.12627625 0.035420435 114.82568 36.068729 6583.9422 2.7635969e+09 0.12352922 0.034544783 114.90413 35.921737 6586.3025 2.5721038e+09 0.12077715 0.033167385 114.96898 35.792050 6588.6629 2.4069805e+09 0.11816189 0.033158544 115.03382 35.662362 6591.0233 2.2745572e+09 0.11455108 0.029175613 115.10704 35.515929 6593.3837 2.1298450e+09 0.11134002 0.026745512 115.18113 35.367813 6595.7441 1.9779659e+09 0.10754761 0.025700732 115.25523 35.224910 6598.1044 1.8308595e+09 0.10448832 0.025357302 115.32933 35.081340 6600.4648 1.6855311e+09 0.10293202 0.025945458 115.40343 34.933145 6602.8252 1.5517962e+09 0.10107686 0.026812442 115.47533 34.789332 6605.1856 1.4441038e+09 0.099367902 0.026820727 115.54017 34.659664 6607.5460 1.3574251e+09 0.097124376 0.024628938 115.60531 34.528975 6609.9063 1.2744515e+09 0.093937914 0.023975155 115.67412 34.386071 6612.2667 1.1987769e+09 0.091859661 0.024121474 115.74392 34.242175 6614.6271 1.1113502e+09 0.091200063 0.023508451 115.81801 34.093979 6616.9875 1.0355448e+09 0.090133435 0.023437282 115.88797 33.951311 6619.3478 9.7430576e+08 0.089763403 0.024609845 115.94817 33.821642 6621.7082 9.2082941e+08 0.088968432 0.024854702 116.00957 33.690132 6624.0686 8.7116648e+08 0.087220290 0.024899035 116.07837 33.547229 6626.4290 8.1402673e+08 0.086041778 0.026044337 116.14717 33.403004 6628.7894 7.5447357e+08 0.084810454 0.026023585 116.21598 33.254809 6631.1497 6.9873299e+08 0.083318279 0.025945977 116.28169 33.114956 6633.5101 6.5766345e+08 0.082014008 0.026241315 116.34189 32.989919 6635.8705 6.2379250e+08 0.080452536 0.026530332 116.40382 32.860229 6638.2309 5.8714894e+08 0.079433034 0.025661584 116.47262 32.712034 6640.5913 5.5083912e+08 0.079684449 0.025198311 116.53875 32.569610 6642.9516 5.1537364e+08 0.079514137 0.025190639 116.59896 32.439941 6645.3120 4.8685099e+08 0.078407133 0.025597852 116.66047 32.308259 6647.6724 4.6637157e+08 0.077152772 0.026791798 116.72927 32.165356 6650.0328 4.4172999e+08 0.076299045 0.026262739 116.79669 32.021062 6652.3932 4.1945082e+08 0.075663882 0.027358693 116.86020 31.872866 6654.7535 3.9455259e+08 0.074594038 0.027715215 116.92248 31.733316 6657.1139 3.6963717e+08 0.072580595 0.029033241 116.98268 31.608279 6659.4743 3.5069973e+08 0.071059241 0.031735662 117.04359 31.478285 6661.8347 3.3206565e+08 0.069737786 0.032960063 117.10711 31.330089 6664.1950 3.1803778e+08 0.068668697 0.031492429 117.17062 31.183611 6666.5554 3.0348391e+08 0.068928446 0.027016826 117.23413 31.040707 6668.9158 2.8398662e+08 0.068015965 0.028281193 117.29994 30.897803 6671.2762 2.6527994e+08 0.068393607 0.026869284 117.36875 30.754901 6673.6366 2.4675333e+08 0.068053859 0.028411238 117.43033 30.619222 6675.9969 2.3410823e+08 0.065921201 0.031707859 117.48590 30.489554 6678.3573 2.2289558e+08 0.065006226 0.030697625 117.54454 30.354770 6680.7177 2.1092620e+08 0.065773589 0.029596397 117.60806 30.211867 6683.0781 2.0224768e+08 0.066539327 0.031302999 117.66894 30.068964 6685.4385 1.9107692e+08 0.066297876 0.033167952 117.72716 29.926062 6687.7988 1.8365550e+08 0.064035795 0.033897384 117.78377 29.791201 6690.1592 1.7523487e+08 0.061910672 0.033097618 117.83935 29.661532 6692.5196 1.6322713e+08 0.060902953 0.032161962 117.89848 29.525929 6694.8800 1.5614028e+08 0.060189664 0.030027706 117.96199 29.383026 6697.2403 1.4964167e+08 0.059551239 0.030121681 118.02254 29.240123 6699.6007 1.4402124e+08 0.057975009 0.031036135 118.08076 29.097219 6701.9611 1.3417925e+08 0.056056026 0.032819658 118.14253 28.950773 6704.3215 1.2437244e+08 0.056379096 0.036335418 118.20604 28.802578 6706.6819 1.1410032e+08 0.056118972 0.039633130 118.25974 28.672450 6709.0422 1.0631586e+08 0.055403095 0.041105677 118.31069 28.547412 6711.4026 1.0240588e+08 0.053396508 0.041150302 118.36943 28.411283 6713.7630 94951144. 0.051061945 0.046446219 118.43294 28.268379 6716.1234 93095526. 0.049200018 0.048583081 118.49258 28.125475 6718.4838 89437763. 0.046855978 0.050565825 118.55080 27.982572 6720.8441 85656570. 0.046726460 0.050321959 118.60902 27.839670 6723.2045 83895228. 0.045701123 0.049483004 118.66724 27.696767 6725.5649 79511852. 0.041431779 0.041223160 118.71853 27.566472 6727.9253 76828335. 0.040486362 0.039727663 118.76947 27.436803 6730.2856 74627854. 0.039088015 0.040770560 118.82618 27.296636 6732.6460 72354111. 0.037560036 0.043859140 118.88440 27.153733 6735.0064 68475702. 0.037408312 0.049300232 118.94262 27.010830 6737.3668 63453661. 0.038843544 0.055303964 119.00085 26.867926 6739.7272 57928444. 0.038427251 0.063716460 119.05907 26.725023 6742.0875 56172984. 0.035192872 0.068824061 119.11662 26.582120 6744.4479 54162478. 0.027899128 0.078139867 119.16955 26.439217 6746.8083 50944210. 0.0072295796 0.069589903 119.22372 26.296314 6749.1687 49125370. 0.019398786 0.072231749 119.28194 26.153411 6751.5291 47782104. 0.046249504 0.073935359 119.34016 26.010508