# # 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 = 54.595333 km # Date (UTC) = 2014-01-18T10:11:03.502 # Date (julian) = 2456675.92434609 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6487.3938 1.0436994e+11 0.026438514 0.028481835 99.523095 43.842278 6489.8670 9.2756734e+10 0.034234081 0.029227624 99.628464 43.686997 6492.3402 8.2070541e+10 0.041771930 0.029973412 99.749476 43.508666 6494.8134 7.2875982e+10 0.048887301 0.030719201 99.866350 43.338345 6497.2866 6.4707369e+10 0.055587736 0.031464990 99.971716 43.188611 6499.7598 5.8675084e+10 0.061701907 0.032210779 100.07708 43.035872 6502.2330 5.4094456e+10 0.067271657 0.032956568 100.18245 42.880593 6504.7062 4.9885284e+10 0.072397284 0.033702357 100.28373 42.725314 6507.1794 4.6221493e+10 0.077210765 0.034448146 100.38355 42.570035 6509.6526 4.2924234e+10 0.082097247 0.035193934 100.48337 42.419943 6512.1258 3.9918164e+10 0.087701110 0.035939723 100.58319 42.269475 6514.5990 3.7319458e+10 0.094834022 0.036685512 100.68302 42.114194 6517.0722 3.4566214e+10 0.10387804 0.037431301 100.78831 41.950398 6519.5455 3.1746186e+10 0.11527701 0.038177090 100.90478 41.769234 6522.0187 2.8939569e+10 0.12926666 0.038922138 101.00386 41.612693 6524.4919 2.6354371e+10 0.13947668 0.039601699 101.09813 41.462959 6526.9651 2.4259678e+10 0.15133647 0.040679855 101.19785 41.307790 6529.4383 2.2350840e+10 0.16258418 0.042933929 101.29669 41.152515 6531.9115 2.0550836e+10 0.17248930 0.046555362 101.39095 40.997263 6534.3847 1.8907539e+10 0.17715019 0.048052171 101.48521 40.841999 6536.8579 1.7366451e+10 0.17783533 0.048558088 101.57949 40.686718 6539.3311 1.5966431e+10 0.17626737 0.050044426 101.67377 40.534601 6541.8043 1.4654706e+10 0.17383140 0.051065697 101.76805 40.384866 6544.2775 1.3413617e+10 0.17125117 0.051869478 101.85807 40.230878 6546.7507 1.2292060e+10 0.16913199 0.053082254 101.94680 40.075600 6549.2239 1.1286330e+10 0.16684525 0.054194487 102.04088 39.920321 6551.6971 1.0410589e+10 0.16528053 0.055480458 102.13426 39.765933 6554.1703 9.6079262e+09 0.16296552 0.054835955 102.22299 39.616199 6556.6436 8.8934252e+09 0.16088843 0.053918511 102.30776 39.471423 6559.1168 8.2598848e+09 0.15815736 0.052374003 102.38540 39.335557 6561.5900 7.6852042e+09 0.15541865 0.051081958 102.46633 39.193930 6564.0632 7.1405582e+09 0.15235083 0.048742967 102.55506 39.038648 6566.5364 6.5765530e+09 0.15023515 0.046879456 102.64379 38.886105 6569.0096 6.0427729e+09 0.14809269 0.044853048 102.73252 38.736371 6571.4828 5.5574998e+09 0.14652012 0.044371415 102.81743 38.582809 6573.9560 5.1247828e+09 0.14388930 0.042890315 102.90061 38.427530 6576.4292 4.7408510e+09 0.14129929 0.040877369 102.98872 38.277170 6578.9024 4.4020771e+09 0.13784334 0.037224601 103.07698 38.126970 6581.3756 4.1155767e+09 0.13469045 0.035482867 103.16017 37.971691 6583.8488 3.8485877e+09 0.13147319 0.034592029 103.24335 37.816412 6586.3220 3.6071565e+09 0.12831191 0.033167133 103.32654 37.661133 6588.7952 3.3651434e+09 0.12576655 0.033114358 103.40972 37.508501 6591.2684 3.1364593e+09 0.12295569 0.028899002 103.49291 37.358767 6593.7417 2.9410299e+09 0.12074438 0.026412710 103.56908 37.218383 6596.2149 2.7812619e+09 0.11804313 0.025726297 103.64186 37.082516 6598.6881 2.6489240e+09 0.11612292 0.025078659 103.72103 36.938141 6601.1613 2.5189205e+09 0.11607922 0.027121639 103.80422 36.788406 6603.6345 2.3800289e+09 0.11493075 0.026287665 103.88740 36.634179 6606.1077 2.2429045e+09 0.11454966 0.027310460 103.97054 36.478948 6608.5809 2.1091731e+09 0.11190389 0.023717013 104.04819 36.329205 6611.0541 1.9846721e+09 0.10865506 0.024923958 104.12583 36.178340 6613.5273 1.8640767e+09 0.10768446 0.023767059 104.20347 36.023061 6616.0005 1.7493626e+09 0.10611298 0.023282379 104.28111 35.870004 6618.4737 1.6473873e+09 0.10547827 0.024128508 104.35875 35.720270 6620.9469 1.5562757e+09 0.10456136 0.025072342 104.43059 35.578822 6623.4201 1.4835217e+09 0.10262867 0.024647477 104.49852 35.442955 6625.8933 1.4168046e+09 0.10094781 0.026463621 104.57166 35.299647 6628.3665 1.3552133e+09 0.098748075 0.025851915 104.64930 35.149913 6630.8397 1.2861136e+09 0.096651129 0.025930371 104.72694 34.996112 6633.3130 1.2154791e+09 0.094807241 0.026206892 104.80458 34.840833 6635.7862 1.1491175e+09 0.092729494 0.026517684 104.88222 34.690713 6638.2594 1.0795269e+09 0.091166220 0.025660342 104.95916 34.540978 6640.7326 1.0184419e+09 0.090981247 0.025181020 105.03125 34.391243 6643.2058 9.6572478e+08 0.090271810 0.025223689 105.10200 34.245999 6645.6790 9.2107263e+08 0.088974365 0.025769765 105.16994 34.110131 6648.1522 8.8208065e+08 0.087879288 0.027066163 105.23896 33.970617 6650.6254 8.4371797e+08 0.087253137 0.026398409 105.31105 33.820885 6653.0986 8.0167372e+08 0.086948055 0.027576007 105.38315 33.668602 6655.5718 7.6050539e+08 0.085431521 0.027846490 105.45525 33.513321 6658.0450 7.2144379e+08 0.083787593 0.030140922 105.52734 33.361682 6660.5182 6.8290102e+08 0.082205862 0.032097040 105.59943 33.211948 6662.9914 6.4910697e+08 0.080834611 0.032488019 105.67153 33.062213 6665.4646 6.1527078e+08 0.080238514 0.027785803 105.74362 32.912199 6667.9378 5.8357321e+08 0.079561568 0.027447945 105.81572 32.756921 6670.4111 5.5587032e+08 0.078911056 0.027138199 105.88439 32.607636 6672.8843 5.3207736e+08 0.078452162 0.027392131 105.94261 32.476621 6675.3575 5.1247044e+08 0.076387701 0.030483034 106.00342 32.342121 6677.8307 4.9209789e+08 0.074519490 0.031177332 106.07552 32.192387 6680.3039 4.6976756e+08 0.074628299 0.029507036 106.14761 32.042654 6682.7771 4.4708230e+08 0.075259426 0.031018265 106.21971 31.892921 6685.2503 4.2587880e+08 0.074891792 0.032969207 106.28858 31.739971 6687.7235 4.0483715e+08 0.072439803 0.033939399 106.35513 31.584690 6690.1967 3.8414752e+08 0.070027982 0.033093321 106.42168 31.433718 6692.6699 3.6240704e+08 0.068803816 0.031987402 106.48823 31.283985 6695.1431 3.4219226e+08 0.068021061 0.029833185 106.55478 31.134251 6697.6163 3.2236056e+08 0.067271139 0.030169262 106.62133 30.984517 6700.0895 3.0678638e+08 0.065602480 0.030734125 106.68788 30.834783 6702.5627 2.9719191e+08 0.064342143 0.033326078 106.75137 30.691919 6705.0359 2.9212417e+08 0.064695952 0.036732505 106.80960 30.560904 6707.5091 2.8788251e+08 0.064323119 0.040113891 106.87037 30.424159 6709.9824 2.7996883e+08 0.063284542 0.040507717 106.93692 30.274425 6712.4556 2.6889199e+08 0.060991380 0.042675786 107.00347 30.121901 6714.9288 2.5573248e+08 0.058857536 0.047373233 107.07002 29.966621 6717.4020 2.4415979e+08 0.056630193 0.049849404 107.13657 29.815222 6719.8752 2.3357813e+08 0.055053494 0.050538353 107.20312 29.665488 6722.3484 2.2252626e+08 0.054992877 0.050174505 107.26469 29.515754 6724.8216 2.1148476e+08 0.051021311 0.043065818 107.32621 29.366020 6727.2948 1.9999960e+08 0.049066219 0.040567627 107.39276 29.216287 6729.7680 1.8772402e+08 0.048229302 0.040533531 107.45770 29.066554 6732.2412 1.8052077e+08 0.046433783 0.043784616 107.51871 28.916820 6734.7144 1.7139086e+08 0.046173014 0.049310615 107.58241 28.767085 6737.1876 1.6588096e+08 0.048106123 0.054733256 107.64895 28.617350 6739.6608 1.5799808e+08 0.048564610 0.063635286 107.71171 28.467616 6742.1340 1.5081373e+08 0.046226185 0.068937365 107.77271 28.317882 6744.6072 1.4420750e+08 0.041640949 0.078263102 107.83372 28.168149 6747.0805 1.3510233e+08 0.036915019 0.067333464 107.89472 28.018416 6749.5537 1.3113915e+08 0.035740637 0.072126341 107.95572 27.868682 6752.0269 1.2506653e+08 0.032023233 0.074103387 108.01673 27.720468 6754.5001 1.2153471e+08 0.030719677 0.075409292 108.07773 27.576280 6756.9733 1.1593975e+08 0.027888002 0.076671299 108.13873 27.429479 6759.4465 1.1238781e+08 0.029206111 0.075927699 108.19973 27.279744 6761.9197 1.0839009e+08 0.032884717 0.078044209 108.26074 27.130010 6764.3929 1.0316149e+08 0.036709153 0.079502108 108.32174 26.980276 6766.8661 99943383. 0.037519436 0.081672893 108.39154 26.808962 6769.3393 93819323. 0.032541065 0.085277240 108.45769 26.642231 6771.8125 90517520. 0.028285953 0.091275853 108.51315 26.492497 6774.2857 86953680. 0.024046549 0.097274467 108.57147 26.342763 6776.7589 81324179. 0.019897425 0.10327308 108.63247 26.193029 6779.2321 78118300. 0.015679728 0.10927169 108.68952 26.047247 6781.7053 77072785. 0.011377051 0.11527031 108.74498 25.903057 6784.1786 73475023. 0.0071981621 0.12126892 108.80548 25.753826 6786.6518 72178060. 0.0029267545 0.12726753 108.86687 25.601442 6789.1250 66351673. -0.0010809751 0.13326615 108.93157 25.426747 6791.5982 60356933. -0.0049868021 0.13926476 108.99420 25.266047 6794.0714 60044456. -0.0092166271 0.14526337 109.05521 25.116313 6796.5446 59475495. -0.013378300 0.15126198 109.11201 24.970780 6799.0178 58031196. -0.017356373 0.15726060 109.16746 24.826592 6801.4910 54746581. -0.020780858 0.16325921 109.22292 24.677111 6803.9642 52211569. -0.024250390 0.16925782 109.27977 24.523611 6806.4374 47356870. -0.023461712 0.17525644 109.34446 24.348951 6808.9106 47452737. -0.032147475 0.18125505 109.40357 24.192734 6813.8570 44430488. -0.050848861 0.19325228 109.52189 23.879890