# # 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 = 37.751794 km # Date (UTC) = 2011-01-24T04:55:57.158 # Date (julian) = 2455585.70552267 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6504.3618 9.2731490e+10 0.066357023 0.033598487 42.992474 49.940296 6507.1021 7.7083385e+10 0.077748561 0.034424820 42.827601 49.746749 6509.8424 6.5355894e+10 0.089403749 0.035251154 42.662748 49.553225 6512.5827 5.6253160e+10 0.10142608 0.036077488 42.497863 49.352616 6515.3230 4.8788158e+10 0.11386092 0.036903821 42.337195 49.156104 6518.0633 4.2508262e+10 0.12675749 0.037730155 42.179478 48.961154 6520.8036 3.7109087e+10 0.14013520 0.038556489 42.021763 48.760425 6523.5439 3.2376079e+10 0.14955363 0.039313927 41.864046 48.565420 6526.2843 2.8334811e+10 0.15506196 0.039966092 41.706328 48.368963 6529.0246 2.5070447e+10 0.16013397 0.042274913 41.548674 48.168295 6531.7649 2.2475542e+10 0.16509455 0.046341964 41.398157 47.974774 6534.5052 2.0234759e+10 0.16791876 0.048085878 41.247621 47.776828 6537.2455 1.8123751e+10 0.16966787 0.048800968 41.097073 47.577664 6539.9858 1.6051267e+10 0.17147145 0.050836925 40.946524 47.384102 6542.7261 1.4098244e+10 0.17096398 0.051277914 40.801883 47.184635 6545.4664 1.2527343e+10 0.17065310 0.052459746 40.664655 46.998842 6548.2067 1.1289551e+10 0.16949275 0.053729387 40.535616 46.832936 6550.9471 1.0241336e+10 0.16637141 0.055222494 40.395086 46.639121 6553.6874 9.2353176e+09 0.16254296 0.054989537 40.254623 46.438391 6556.4277 8.2217079e+09 0.15806023 0.053950249 40.118327 46.237745 6559.1680 7.3040364e+09 0.15379301 0.052368220 39.974977 46.044222 6561.9083 6.4950014e+09 0.15038444 0.050925090 39.836028 45.846254 6564.6486 5.8529983e+09 0.14690458 0.048477646 39.704131 45.653238 6567.3889 5.3377826e+09 0.14415515 0.046288342 39.587384 45.487333 6570.1292 4.9041493e+09 0.14190152 0.044863975 39.459073 45.300737 6572.8695 4.4721463e+09 0.13937179 0.043732189 39.324290 45.100008 6575.6099 4.0302256e+09 0.13651002 0.041762829 39.195248 44.899279 6578.3502 3.6560570e+09 0.13333306 0.038096656 39.076095 44.726559 6581.0905 3.3487986e+09 0.12992319 0.035569210 38.957173 44.554493 6583.8308 3.0827221e+09 0.12698835 0.034601157 38.828132 44.353763 6586.5711 2.8093554e+09 0.12411877 0.033163914 38.699111 44.158669 6589.3114 2.5560424e+09 0.12118358 0.032428158 38.579594 43.973451 6592.0517 2.3276600e+09 0.11746036 0.028023284 38.475137 43.801400 6594.7920 2.1245463e+09 0.11356082 0.025737732 38.352011 43.607571 6597.5323 1.9244467e+09 0.10947202 0.025554738 38.225582 43.409454 6600.2727 1.7338018e+09 0.10725410 0.025550415 38.103708 43.215891 6603.0130 1.5803428e+09 0.10484767 0.026655594 37.998721 43.043188 6605.7533 1.4468896e+09 0.10242693 0.027296988 37.888305 42.861327 6608.4936 1.3359068e+09 0.097926283 0.023719321 37.766431 42.660597 6611.2339 1.2344728e+09 0.092562974 0.024809293 37.661054 42.492853 6613.9742 1.1382033e+09 0.089866582 0.023931033 37.553320 42.315811 6616.7145 1.0579435e+09 0.087354782 0.023394444 37.438617 42.115078 6619.4548 9.8367739e+08 0.086432968 0.024635660 37.333388 41.946559 6622.1952 9.0946665e+08 0.085543556 0.024706049 37.225881 41.770296 6624.9355 8.4324095e+08 0.084218509 0.025363058 37.111178 41.569563 6627.6758 7.8091599e+08 0.082537956 0.025577852 37.011267 41.394719 6630.4161 7.1855452e+08 0.081336948 0.025929327 36.908450 41.216763 6633.1564 6.6198213e+08 0.079972832 0.026179559 36.793770 41.023240 6635.8967 6.1245647e+08 0.078407342 0.026534263 36.698899 40.848612 6638.6370 5.6438551e+08 0.077418041 0.025643889 36.601041 40.671131 6641.3773 5.2120688e+08 0.078201286 0.025149582 36.486337 40.477568 6644.1176 4.8160260e+08 0.077417289 0.025356321 36.390958 40.302453 6646.8580 4.4022279e+08 0.076424974 0.026364253 36.295251 40.123802 6649.5983 4.0800242e+08 0.075381764 0.026809007 36.187716 39.923073 6652.3386 3.7801385e+08 0.074895607 0.027343677 36.093016 39.751430 6655.0789 3.4446191e+08 0.073717161 0.027642813 35.997655 39.578288 6657.8192 3.1560906e+08 0.071575448 0.029851358 35.890120 39.377559 6660.5595 2.8879017e+08 0.069667429 0.032134567 35.795076 39.205137 6663.2998 2.6634842e+08 0.067866574 0.032400124 35.701388 39.032774 6666.0401 2.4665261e+08 0.067198967 0.026916416 35.601023 38.832043 6668.7804 2.2813968e+08 0.065644764 0.028161414 35.507136 38.658843 6671.5208 2.1242856e+08 0.065191657 0.026872770 35.413632 38.487264 6674.2611 1.9823186e+08 0.063781828 0.029175020 35.313288 38.286575 6677.0014 1.8800287e+08 0.060766632 0.032356255 35.223940 38.112597 6679.7417 1.7697283e+08 0.060493048 0.029654870 35.137915 37.945829 6682.4820 1.6627611e+08 0.061417349 0.030792812 35.051888 37.773778 6685.2223 1.5353407e+08 0.061278010 0.032939657 34.958505 37.590689 6687.9626 1.3962369e+08 0.058612291 0.033806034 34.860560 37.399668 6690.7029 1.2741202e+08 0.056220632 0.033035306 34.780682 37.227620 6693.4432 1.1766216e+08 0.054879558 0.031452027 34.690749 37.045014 6696.1836 1.1128737e+08 0.054282410 0.029752051 34.592345 36.853514 6698.9239 1.0444484e+08 0.052722702 0.031485937 34.512466 36.681465 6701.6642 97995249. 0.050422228 0.032383992 34.422992 36.499340 6704.4045 90213658. 0.050403627 0.036376182 34.324133 36.307359 6707.1448 85165613. 0.049961527 0.040166083 34.244252 36.135310 6709.8851 80790754. 0.048721791 0.040569565 34.158431 35.953665 6712.6254 75494441. 0.045796226 0.042991171 34.065915 35.761516 6715.3657 70925450. 0.042798386 0.047752657 33.986034 35.595611 6718.1061 66830582. 0.039294439 0.049977581 33.900520 35.414968 6720.8464 64127823. 0.037100022 0.050321700 33.807899 35.215270 6723.5867 60923753. 0.031538745 0.049696142 33.734161 35.049365 6726.3270 56728281. 0.0015003958 0.040954317 33.657961 34.880995 6729.0673 54011683. 0.021258819 0.041000572 33.578083 34.708943 6731.8076 53269096. 0.067324524 0.043357315 33.493446 34.520253