# # 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 = 44.799099 km # Date (UTC) = 2017-01-05T10:47:43.253 # Date (julian) = 2457758.94980617 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6520.4274 3.7814211e+10 0.15846891 0.038443042 94.748454 32.193087 6522.6360 3.3816056e+10 0.16764407 0.039083789 94.802377 32.085242 6524.8445 3.0588243e+10 0.17307184 0.039726987 94.856299 31.977397 6527.0531 2.7803940e+10 0.17675195 0.040755021 94.914000 31.864423 6529.2617 2.5017389e+10 0.17875355 0.042652588 94.974664 31.747427 6531.4702 2.2468133e+10 0.18070468 0.045913094 95.033625 31.633717 6533.6788 2.0251848e+10 0.18171246 0.047808050 95.087551 31.529723 6535.8873 1.8442503e+10 0.18041671 0.047839370 95.141476 31.425729 6538.0959 1.6811330e+10 0.18066563 0.049203383 95.199825 31.310356 6540.3045 1.5172810e+10 0.17976452 0.050997941 95.260489 31.189028 6542.5130 1.3676264e+10 0.17739082 0.051197013 95.318805 31.073739 6544.7216 1.2447791e+10 0.17549664 0.052229717 95.372735 30.969731 6546.9302 1.1473670e+10 0.17315479 0.053229892 95.426665 30.865723 6549.1387 1.0612010e+10 0.17021782 0.054107641 95.485663 30.751940 6551.3473 9.7482270e+09 0.16773711 0.055357650 95.546327 30.634944 6553.5558 8.9137259e+09 0.16475164 0.055055655 95.602278 30.523733 6555.7644 8.2052917e+09 0.16096842 0.054211087 95.652348 30.419739 6557.9730 7.5942106e+09 0.15699872 0.053256253 95.702418 30.315744 6560.1815 7.0089646e+09 0.15238332 0.052110644 95.761478 30.200718 6562.3901 6.4238890e+09 0.14793841 0.050508725 95.822142 30.083724 6564.5986 5.8913766e+09 0.14425745 0.048500292 95.877078 29.971677 6566.8072 5.4674409e+09 0.14160178 0.046726250 95.927152 29.863831 6569.0158 5.1132245e+09 0.13903913 0.044853451 95.977225 29.755984 6571.2243 4.7801136e+09 0.13718878 0.044442007 96.037301 29.639497 6573.4329 4.4280223e+09 0.13490676 0.043310098 96.097965 29.522501 6575.6415 4.0643551e+09 0.13251610 0.041731130 96.155875 29.405495 6577.8500 3.7305303e+09 0.13001983 0.038885208 96.212213 29.288482 6580.0586 3.4354723e+09 0.12740616 0.036466622 96.266487 29.175756 6582.2671 3.2016611e+09 0.12480917 0.035221100 96.316557 29.071762 6584.4757 3.0065054e+09 0.12224470 0.034256381 96.366627 28.967769 6586.6843 2.8241297e+09 0.11976109 0.033162451 96.421288 28.854245 6588.8928 2.6364404e+09 0.11741033 0.033081770 96.477622 28.737250 6591.1014 2.4482788e+09 0.11451016 0.029087513 96.531292 28.625782 6593.3099 2.2865177e+09 0.11184140 0.026814068 96.581362 28.521788 6595.5185 2.1477438e+09 0.10857309 0.025677341 96.631432 28.417794 6597.7271 2.0193056e+09 0.10569732 0.025493293 96.683101 28.303023 6599.9356 1.8853214e+09 0.10415047 0.024986003 96.735100 28.186027 6602.1442 1.7516728e+09 0.10298809 0.027393588 96.786098 28.075800 6604.3528 1.6441614e+09 0.10096569 0.026280728 96.836174 27.971793 6606.5613 1.5587624e+09 0.099433288 0.026495304 96.886251 27.867786 6608.7699 1.4709068e+09 0.095922176 0.023712016 96.942113 27.751762 6610.9784 1.3740333e+09 0.092545482 0.024937851 96.998443 27.634767 6613.1870 1.2783047e+09 0.091590259 0.023642200 97.048531 27.525798 6615.3956 1.2044586e+09 0.090503822 0.023263702 97.094752 27.421804 6617.6041 1.1471894e+09 0.089790130 0.023639543 97.141095 27.317536 6619.8127 1.0868242e+09 0.089463196 0.024722001 97.193094 27.200540 6622.0212 1.0205151e+09 0.088644515 0.024752339 97.245093 27.083545 6624.2298 9.5358018e+08 0.087194501 0.024985322 97.300181 26.966550 6626.4384 8.9209195e+08 0.086120045 0.026032387 97.356511 26.849555 6628.6469 8.3863543e+08 0.084996083 0.025965753 97.408741 26.739394 6630.8555 7.9501698e+08 0.083575148 0.025930410 97.454962 26.639251 6633.0640 7.5664892e+08 0.082421317 0.026163435 97.501183 26.539109 6635.2726 7.2658592e+08 0.080996767 0.026440670 97.552076 26.425330 6637.4812 6.9149066e+08 0.079759058 0.025925749 97.604072 26.308334 6639.6897 6.4928213e+08 0.079457851 0.025381549 97.656073 26.191330 6641.8983 6.0545899e+08 0.079914566 0.025151351 97.708081 26.074316 6644.1069 5.6380875e+08 0.079047329 0.025355155 97.758965 25.959828 6646.3154 5.2922120e+08 0.078128555 0.026083417 97.805186 25.855834 6648.5240 4.9922589e+08 0.077059896 0.027315037 97.851406 25.751840 6650.7325 4.7115241e+08 0.076533346 0.026422936 97.901079 25.642666 6652.9411 4.4312217e+08 0.076165173 0.027509456 97.953074 25.530005 6655.1497 4.1317258e+08 0.074928850 0.027672057 98.003815 25.416087 6657.3582 3.8317571e+08 0.073177722 0.029316640 98.051480 25.299092 6659.5668 3.5804422e+08 0.071833452 0.031716366 98.099144 25.182099 6661.7753 3.3737834e+08 0.070614242 0.032929851 98.145391 25.077869 6663.9839 3.2793055e+08 0.069395711 0.032210548 98.191612 24.973874 6666.1925 3.1652160e+08 0.069742176 0.026946100 98.240061 24.866536 6668.4010 3.0321105e+08 0.069070245 0.027825659 98.292056 24.753874 6670.6096 2.8781500e+08 0.069060936 0.027046218 98.343715 24.640872 6672.8182 2.7254541e+08 0.068979533 0.027353816 98.391387 24.523859 6675.0267 2.6417979e+08 0.067616906 0.029849528 98.439059 24.406847 6677.2353 2.5244524e+08 0.065702737 0.032023747 98.490065 24.289848 6679.4438 2.4064494e+08 0.065558846 0.029901003 98.542064 24.172853 6681.6524 2.2988007e+08 0.066590860 0.030157870 98.589606 24.063658 6683.8610 2.1754363e+08 0.067001315 0.032450329 98.631975 23.963515 6686.0695 2.0966622e+08 0.066438453 0.033801534 98.674343 23.863373 6688.2781 2.0176319e+08 0.063807938 0.033849382 98.721301 23.748627 6690.4866 1.9146572e+08 0.062158364 0.033060094 98.768966 23.631631 6692.6952 1.8579283e+08 0.061158219 0.031958026 98.816631 23.517057 6694.9038 1.7605554e+08 0.060476712 0.029994347 98.864296 23.404395 6697.1123 1.6768927e+08 0.059856747 0.030105481 98.913047 23.290645 6699.3209 1.6011470e+08 0.058381728 0.031294341 98.965043 23.173650 6701.5295 1.4689770e+08 0.056500950 0.032186304 99.017039 23.056655 6703.7380 1.3641082e+08 0.056439892 0.035521982 99.064950 22.943747 6705.9466 1.3012678e+08 0.056311884 0.038351427 99.112615 22.831086 6708.1551 1.2242528e+08 0.055813439 0.040212517 99.160280 22.718423 6710.3637 1.1900523e+08 0.054382935 0.040567684 99.207945 22.605761 6712.5723 1.1682913e+08 0.052245630 0.042892455 99.255613 22.491673 6714.7808 1.1069967e+08 0.050132579 0.047362111 99.303285 22.374660 6716.9894 1.0473110e+08 0.048015367 0.049858631 99.350870 22.257735 6719.1979 98535929. 0.045723920 0.051181777 99.394201 22.145073 6721.4065 94512434. 0.046029650 0.050426381 99.437531 22.032411 6723.6151 94636294. 0.044464199 0.049711977 99.483950 21.919749 6725.8236 87833000. 0.040238168 0.041061538 99.531614 21.807087 6728.0322 80191774. 0.039164881 0.039673724 99.579279 21.692672 6730.2408 74559134. 0.037504946 0.040709002 99.626944 21.575676 6732.4493 75272228. 0.036051203 0.043822926 99.674609 21.459100 6734.6579 76716076. 0.035810745 0.049314017 99.722275 21.346438 6736.8664 74022787. 0.037394071 0.053630618 99.769940 21.233775 6739.0750 70025737. 0.037834779 0.062918334 99.814185 21.121113 6741.2836 61683745. 0.035606663 0.066567417 99.857516 21.008452 6743.4921 60984143. 0.031131452 0.074367269 99.902932 20.895790 6745.7007 57941904. 0.028292934 0.078861447 99.950597 20.783128 6747.9092 58683059. 0.023577388 0.067048144 99.997511 20.670466 6750.1178 55732967. 0.019351705 0.072205288 100.04084 20.557804 6752.3264 50383844. 0.013217167 0.073756810 100.08417 20.445142 6754.5349 49168811. 0.0060344210 0.075353241 100.13126 20.328729 6756.7435 47019573. -0.031668559 0.076080015 100.17892 20.211733 6758.9521 46852064. -0.0024042719 0.075718558 100.22417 20.097145 6761.1606 44184404. 0.061249125 0.077981495 100.26751 19.984466