# # 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 = 42.058485 km # Date (UTC) = 2017-01-24T10:54:28.564 # Date (julian) = 2457777.95449726 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6510.7775 5.0816428e+10 0.10433296 0.035533130 89.367555 45.541497 6513.0497 4.4529211e+10 0.11545856 0.036218315 89.480496 45.375053 6515.3219 3.9480133e+10 0.12684734 0.036903500 89.593441 45.208610 6517.5942 3.5083644e+10 0.13841552 0.037588686 89.706386 45.042168 6519.8664 3.1225514e+10 0.15016464 0.038273871 89.819332 44.875725 6522.1386 2.8143428e+10 0.16182582 0.038953555 89.913049 44.730817 6524.4109 2.5655990e+10 0.16790152 0.039572923 90.004760 44.588157 6526.6831 2.3502088e+10 0.17287330 0.040384237 90.110865 44.417500 6528.9553 2.1429172e+10 0.17634798 0.042200349 90.219395 44.246684 6531.2276 1.9318923e+10 0.17933807 0.045559900 90.332336 44.080239 6533.4998 1.7363145e+10 0.18180764 0.047731985 90.438408 43.913796 6535.7720 1.5579058e+10 0.18141680 0.047889395 90.539466 43.747354 6538.0443 1.3916860e+10 0.18208720 0.049178232 90.645846 43.580911 6540.3165 1.2536661e+10 0.18147415 0.051003620 90.748494 43.419546 6542.5887 1.1442716e+10 0.17900630 0.051225749 90.835109 43.276882 6544.8610 1.0525781e+10 0.17660947 0.052342769 90.926836 43.126765 6547.1332 9.7281107e+09 0.17303956 0.053338012 91.033835 42.954379 6549.4054 8.9170463e+09 0.16859162 0.054379430 91.137454 42.785371 6551.6776 8.1203155e+09 0.16448470 0.055473615 91.238508 42.618927 6553.9499 7.3459643e+09 0.16012790 0.054857576 91.339544 42.452513 6556.2221 6.6603596e+09 0.15665132 0.053980471 91.436604 42.290941 6558.4943 6.1144829e+09 0.15380204 0.052818065 91.518126 42.148280 6560.7666 5.6584145e+09 0.15026302 0.051583146 91.604356 41.999888 6563.0388 5.2675184e+09 0.14710077 0.049883480 91.705410 41.833442 6565.3110 4.8985368e+09 0.14400886 0.047965212 91.795551 41.677440 6567.5833 4.5728470e+09 0.14132228 0.046124020 91.877073 41.529685 6569.8555 4.2850766e+09 0.13895691 0.044908104 91.966694 41.370790 6572.1277 3.9801370e+09 0.13651345 0.044157008 92.061802 41.204346 6574.4000 3.6379349e+09 0.13366734 0.042662905 92.156914 41.037903 6576.6722 3.3185831e+09 0.13099625 0.040597685 92.248879 40.876968 6578.9444 3.0648084e+09 0.12755950 0.037158258 92.330398 40.734306 6581.2167 2.8578137e+09 0.12456287 0.035531003 92.413973 40.585251 6583.4889 2.6780292e+09 0.12178773 0.034774214 92.503140 40.418806 6585.7611 2.5054098e+09 0.11878116 0.033362276 92.587820 40.266313 6588.0334 2.3510232e+09 0.11624254 0.033368794 92.669339 40.123652 6590.3056 2.1928350e+09 0.11304845 0.030493638 92.755619 39.966174 6592.5778 2.0412320e+09 0.10969763 0.027512293 92.844768 39.799765 6594.8500 1.9052922e+09 0.10628968 0.025705890 92.921941 39.650914 6597.1223 1.7846589e+09 0.10260297 0.025684141 92.998367 39.503157 6599.3945 1.6834920e+09 0.099908823 0.024953458 93.087262 39.337113 6601.6667 1.5714576e+09 0.098780365 0.027359686 93.172653 39.177718 6603.9390 1.4768740e+09 0.096647030 0.026107406 93.249080 39.035056 6606.2112 1.3804242e+09 0.096051727 0.027124440 93.327773 38.884458 6608.4834 1.2920674e+09 0.093612453 0.023719590 93.410995 38.718016 6610.7557 1.2042955e+09 0.090806157 0.024725000 93.489787 38.567065 6613.0279 1.1227151e+09 0.089881021 0.023583826 93.566210 38.424404 6615.3001 1.0626680e+09 0.088749695 0.023260766 93.639128 38.281742 6617.5724 1.0050418e+09 0.087874275 0.023629013 93.710462 38.139079 6619.8446 9.4504842e+08 0.087462664 0.024729700 93.790427 37.979151 6622.1168 8.8209407e+08 0.086475007 0.024726898 93.873127 37.813750 6624.3891 8.2961335e+08 0.084863931 0.025070568 93.944458 37.671089 6626.6613 7.7498229e+08 0.083376866 0.025748364 94.016753 37.526499 6628.9335 7.2281871e+08 0.082234125 0.026082112 94.099974 37.360054 6631.2057 6.7047743e+08 0.080710047 0.025951666 94.178453 37.203096 6633.4780 6.2368566e+08 0.079471948 0.026235703 94.249783 37.060435 6635.7502 5.9193225e+08 0.077938758 0.026512293 94.318891 36.917775 6638.0224 5.6384242e+08 0.076829337 0.025670664 94.385125 36.775114 6640.2947 5.3777825e+08 0.076751773 0.025234598 94.459394 36.621207 6642.5669 5.0849460e+08 0.076636656 0.025174895 94.542600 36.454795 6644.8391 4.8048996e+08 0.075614731 0.025434299 94.612385 36.307167 6647.1114 4.5504343e+08 0.074376376 0.026496416 94.678624 36.164507 6649.3836 4.2571358e+08 0.073306532 0.027104913 94.754003 36.002150 6651.6558 3.9877976e+08 0.072923739 0.026986766 94.829667 35.839179 6653.9281 3.7622098e+08 0.072413389 0.027999497 94.895901 35.696518 6656.2003 3.5934190e+08 0.070828664 0.028199216 94.962136 35.553857 6658.4725 3.4426142e+08 0.069635688 0.030899114 95.028374 35.411194 6660.7448 3.2885651e+08 0.068586580 0.032302947 95.097047 35.263286 6663.0170 3.0860834e+08 0.067787755 0.032478504 95.174323 35.096842 6665.2892 2.8971045e+08 0.067649417 0.028073232 95.245655 34.943202 6667.5615 2.7830310e+08 0.067467997 0.027309689 95.311889 34.800541 6669.8337 2.6331644e+08 0.067131288 0.027499451 95.375192 34.657879 6672.1059 2.5209888e+08 0.067285855 0.026940990 95.436334 34.515217 6674.3781 2.3833284e+08 0.066653309 0.029273783 95.507365 34.357978 6676.6504 2.2655653e+08 0.064708064 0.032132889 95.584641 34.191536 6678.9226 2.2034905e+08 0.064165189 0.030319533 95.646901 34.047227 6681.1948 2.0906885e+08 0.065591810 0.029806837 95.708043 33.904566 6683.4671 2.0099466e+08 0.066380903 0.031873081 95.774114 33.766837 6685.7393 1.9033607e+08 0.066298644 0.033485725 95.840384 33.629068 6688.0115 1.7910702e+08 0.064260429 0.033787853 95.911710 33.462671 6690.2838 1.7041068e+08 0.062603417 0.033083344 95.979752 33.303909 6692.5560 1.5801774e+08 0.062000244 0.032119681 96.040894 33.161249 6694.8282 1.4336554e+08 0.061810627 0.030100218 96.102035 33.018588 6697.1005 1.3334883e+08 0.061678771 0.030103979 96.163173 32.875927 6699.3727 1.2163082e+08 0.060745995 0.031246543 96.225996 32.723821 6701.6449 1.1134799e+08 0.059404120 0.032355734 96.291372 32.557410 6703.9172 1.0212323e+08 0.060086300 0.035970251 96.353720 32.411627 6706.1894 89255270. 0.060928629 0.038776018 96.414862 32.274062 6708.4616 80890457. 0.061236295 0.040546265 96.476004 32.132661 6710.7339 78579428. 0.060067951 0.040640137 96.537146 31.989997 6713.0061 75878992. 0.058411669 0.043708622 96.601642 31.828555 6715.2783 74743735. 0.056617170 0.047663240 96.666574 31.664669 6717.5505 72306733. 0.054866311 0.049840215 96.727712 31.522007 6719.8228 70420529. 0.053691222 0.050588142 96.788113 31.380083 6722.0950 73563699. 0.053677826 0.050487749 96.844159 31.242516 6724.3672 70697661. 0.051190503 0.046859976 96.901906 31.099692 6726.6395 68144487. 0.048492440 0.040957135 96.967295 30.933250 6728.9117 61765266. 0.048927884 0.040920281 97.030561 30.781240 6731.1839 59381577. 0.047623223 0.042116087 97.091703 30.643674 6733.4562 59360827. 0.046750860 0.046400962 97.155126 30.490596 6735.7284 62120239. 0.047907942 0.050066679 97.220515 30.324151 6738.0006 61357761. 0.050029445 0.057324550 97.277913 30.178039 6740.2729 56719914. 0.051151032 0.064516496 97.333955 30.035378 6742.5451 49655069. 0.050946617 0.069938969 97.385457 29.897263 6744.8173 43224986. 0.051487355 0.078425590 97.436411 29.759696 6747.0896 43011152. 0.052173367 0.067330331 97.500782 29.595288 6749.3618 39995182. 0.086112060 0.072178876 97.563861 29.435985 6751.6340 42455293. 0.053938074 0.073979737 97.619907 29.298420 6753.9062 43329053. -0.0017751622 0.075910076 97.678606 29.152645