# # 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 = 43.911696 km # Date (UTC) = 2017-01-06T09:55:52.040 # Date (julian) = 2457759.91379675 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6518.0440 4.3102317e+10 0.14658747 0.037724335 107.54136 32.785946 6519.9806 3.9631296e+10 0.15641332 0.038308308 107.59452 32.685551 6521.9172 3.6004325e+10 0.16622926 0.038892282 107.65152 32.579164 6523.8538 3.2599023e+10 0.17069241 0.039390721 107.70851 32.472777 6525.7904 2.9361384e+10 0.17421838 0.039692011 107.76181 32.370075 6527.7270 2.6402082e+10 0.17817228 0.041244257 107.81501 32.267471 6529.6636 2.3939950e+10 0.18069459 0.043292770 107.86619 32.168777 6531.6001 2.1873374e+10 0.18223460 0.046102197 107.91347 32.077589 6533.5367 2.0240954e+10 0.18317457 0.047747683 107.96075 31.986401 6535.4733 1.8727586e+10 0.18271422 0.048018970 108.01174 31.889414 6537.4099 1.7221446e+10 0.18248568 0.048878483 108.06873 31.783026 6539.3465 1.5764602e+10 0.18135724 0.050063063 108.12573 31.676639 6541.2831 1.4424878e+10 0.17945777 0.051234724 108.17544 31.581645 6543.2197 1.3357420e+10 0.17742885 0.051439550 108.22272 31.490457 6545.1563 1.2462382e+10 0.17541774 0.052456967 108.27001 31.399269 6547.0929 1.1628697e+10 0.17276053 0.053322679 108.31896 31.299090 6549.0295 1.0784891e+10 0.16936028 0.053996295 108.36835 31.196503 6550.9660 9.9391039e+09 0.16632856 0.055227248 108.41834 31.093915 6552.9026 9.1468271e+09 0.16366399 0.055359574 108.47154 30.991327 6554.8392 8.4150013e+09 0.16062576 0.054849991 108.52473 30.888739 6556.7758 7.7842682e+09 0.15755835 0.053899067 108.57483 30.790355 6558.7124 7.2570566e+09 0.15465053 0.052632251 108.62211 30.695778 6560.6490 6.8059103e+09 0.15176631 0.051689160 108.66940 30.601200 6562.5856 6.3917041e+09 0.14905350 0.050322701 108.71788 30.502101 6564.5222 5.9556390e+09 0.14623216 0.048534949 108.76727 30.399514 6566.4588 5.5331146e+09 0.14378661 0.046923365 108.81667 30.296926 6568.3954 5.1571699e+09 0.14180197 0.045408241 108.86409 30.204969 6570.3319 4.8572220e+09 0.14000108 0.044780008 108.91137 30.113781 6572.2685 4.6084409e+09 0.13779935 0.044076375 108.95865 30.022593 6574.2051 4.3665739e+09 0.13498629 0.042756487 109.00799 29.920329 6576.1417 4.1121013e+09 0.13242237 0.041208283 109.05738 29.817741 6578.0783 3.8454871e+09 0.12985390 0.038525971 109.10678 29.715153 6580.0149 3.5814032e+09 0.12726618 0.036506993 109.15617 29.612565 6581.9515 3.3332360e+09 0.12464554 0.035308488 109.20557 29.509977 6583.8881 3.1236081e+09 0.12200639 0.034572166 109.25108 29.415457 6585.8247 2.9550097e+09 0.11944463 0.033311478 109.29498 29.324269 6587.7612 2.8204997e+09 0.11719041 0.033327033 109.33889 29.233081 6589.6978 2.6876737e+09 0.11440806 0.031661530 109.38690 29.133368 6591.6344 2.5332986e+09 0.11128708 0.028486032 109.43630 29.030765 6593.5710 2.3736238e+09 0.10845094 0.026571348 109.48507 28.929090 6595.5076 2.2278843e+09 0.10539598 0.025676211 109.52897 28.834525 6597.4442 2.1155289e+09 0.10280069 0.025582556 109.57288 28.739959 6599.3808 2.0247873e+09 0.10112549 0.024952633 109.61763 28.644155 6601.3174 1.9280414e+09 0.10097319 0.027195156 109.66702 28.541567 6603.2540 1.8257778e+09 0.10003805 0.026512926 109.71642 28.438978 6605.1906 1.7148591e+09 0.099635987 0.026824904 109.76382 28.336391 6607.1271 1.6046899e+09 0.098603238 0.025455930 109.80942 28.233803 6609.0637 1.5083237e+09 0.095989593 0.023724864 109.85502 28.131216 6611.0003 1.4215091e+09 0.093494035 0.024958249 109.89911 28.038782 6612.9369 1.3551702e+09 0.092712927 0.023620725 109.94301 27.947594 6614.8735 1.3080511e+09 0.091617488 0.023338682 109.98691 27.856406 6616.8101 1.2540170e+09 0.090316984 0.023409443 110.03239 27.758151 6618.7467 1.1978254e+09 0.089742515 0.024334631 110.07799 27.659363 6620.6833 1.1313210e+09 0.089193480 0.024987382 110.12472 27.559438 6622.6199 1.0596714e+09 0.088118117 0.024593006 110.17412 27.456834 6624.5565 9.9443837e+08 0.086779812 0.025160176 110.22352 27.354231 6626.4930 9.3870183e+08 0.085421088 0.025962721 110.26701 27.259234 6628.4296 8.9639696e+08 0.084182142 0.025877530 110.30753 27.168046 6630.3662 8.6222579e+08 0.082807970 0.025929204 110.34806 27.076859 6632.3028 8.2787055e+08 0.081313101 0.026068655 110.39217 26.977629 6634.2394 7.8704479e+08 0.079972353 0.026344306 110.43776 26.875042 6636.1760 7.4683803e+08 0.078613991 0.026481408 110.48336 26.772454 6638.1126 7.0705772e+08 0.077763098 0.025666737 110.52895 26.669866 6640.0492 6.6934753e+08 0.077830671 0.025264636 110.57454 26.567277 6641.9858 6.3070658e+08 0.078171196 0.025151648 110.61790 26.469724 6643.9224 5.9755662e+08 0.077555663 0.025331882 110.65843 26.378536 6645.8589 5.6867071e+08 0.077052482 0.025854066 110.69896 26.287348 6647.7955 5.4217640e+08 0.076491091 0.026856630 110.74192 26.190680 6649.7321 5.1247539e+08 0.076040314 0.026624496 110.78751 26.088092 6651.6687 4.7446879e+08 0.076016808 0.026996635 110.83311 25.985504 6653.6053 4.4306244e+08 0.075918679 0.027834706 110.87871 25.886129 6655.5419 4.1694172e+08 0.074880108 0.027834126 110.92431 25.787326 6657.4785 3.9591780e+08 0.073671223 0.029456132 110.96991 25.687700 6659.4151 3.7739602e+08 0.072558181 0.031748015 111.01551 25.585113 6661.3517 3.5598661e+08 0.071616926 0.032714057 111.06110 25.482525 6663.2882 3.4046285e+08 0.070747701 0.032403332 111.10175 25.386612 6665.2248 3.2451982e+08 0.070598317 0.028178725 111.13890 25.295424 6667.1614 3.1171796e+08 0.070335524 0.027162753 111.17605 25.204235 6669.0980 2.9805948e+08 0.069380506 0.028255032 111.21848 25.108300 6671.0346 2.8563673e+08 0.069648019 0.026865841 111.26407 25.009512 6672.9712 2.7639604e+08 0.069400153 0.027442523 111.30966 24.910712 6674.9078 2.6620277e+08 0.068110742 0.029720569 111.35526 24.808163 6676.8444 2.5375508e+08 0.066171842 0.032257920 111.40085 24.705575 6678.7810 2.3498278e+08 0.065761922 0.030414270 111.44508 24.602988 6680.7176 2.2319437e+08 0.066674037 0.029596367 111.48687 24.500400 6682.6541 2.0939865e+08 0.067440239 0.030924335 111.52867 24.397813 6684.5907 2.0239392e+08 0.067495746 0.032684069 111.57047 24.297994 6686.5273 1.9712085e+08 0.066508892 0.034067890 111.61226 24.199205 6688.4639 1.8913425e+08 0.064233614 0.033892278 111.65442 24.100048 6690.4005 1.8340547e+08 0.062949623 0.033069965 111.70002 23.997460 6692.3371 1.6985947e+08 0.062219196 0.032373881 111.74561 23.894872 6694.2737 1.6043665e+08 0.061454823 0.030877443 111.78728 23.799152 6696.2103 1.5483344e+08 0.061212741 0.029763150 111.82443 23.711330 6698.1469 1.5482496e+08 0.060201512 0.030419405 111.86159 23.623508 6700.0835 1.5372597e+08 0.058528028 0.030729619 111.90109 23.528235 6702.0200 1.4863741e+08 0.056757807 0.032892735 111.94288 23.425647 6703.9566 1.3988593e+08 0.056865860 0.036069036 111.98468 23.323059 6705.8932 1.3037387e+08 0.056600019 0.038256576 112.02647 23.223787 6707.8298 1.2161441e+08 0.055915103 0.040067957 112.06827 23.124998 6709.7664 1.1539071e+08 0.054508916 0.040645074 112.11006 23.025295 6711.7030 1.1168589e+08 0.052169789 0.041492045 112.15186 22.922707 6713.6396 1.0712472e+08 0.049747210 0.045999855 112.19365 22.820119 6715.5762 1.0852397e+08 0.047705751 0.047967880 112.23545 22.719845 6717.5128 1.0281460e+08 0.045192090 0.049842552 112.27725 22.621056 6719.4494 1.0246676e+08 0.043046404 0.050942922 112.31904 22.522268 6721.3859 99990187. 0.042796877 0.050420185 112.36084 22.423480 6723.3225 97626374. 0.040967903 0.049548825 112.40263 22.324691 6725.2591 96687760. 0.036573320 0.041414160 112.44443 22.224592 6727.1957 88929750. 0.034242351 0.040699644 112.48622 22.122004 6729.1323 84374759. 0.033059924 0.040957246 112.52802 22.019416 6731.0689 79173964. 0.030428193 0.041887129 112.56710 21.919537 6733.0055 77588723. 0.028771163 0.043954056 112.60510 21.820748 6734.9421 75971339. 0.028102038 0.049296918 112.64340 21.721958 6736.8787 73064826. 0.028613707 0.053676828 112.68520 21.623155 6738.8152 72508898. 0.028550702 0.061809411 112.72700 21.524352 6740.7518 70423628. 0.026303641 0.065334749 112.77149 21.417252 6742.6884 65700031. 0.020770333 0.070288237 112.81926 21.300007 6744.6250 62583610. 0.013741584 0.078276848 112.86559 21.185475 6746.5616 61851132. 0.0059856796 0.072457959 112.90358 21.086687 6748.4982 56930394. -0.0089191141 0.069637934 112.94158 20.987899 6750.4348 56136470. -0.079083801 0.072746548 112.97957 20.889110 6752.3714 50695710. -0.031270771 0.073704724 113.01757 20.790322 6754.3080 47418354. 0.10600941 0.075718222 113.05556 20.691534