# # 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 = 35.814688 km # Date (UTC) = 2016-12-18T09:21:13.918 # Date (julian) = 2457740.88974442 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6514.6067 6.3325362e+10 0.12376036 0.036687827 -20.835991 49.670231 6516.8796 5.5284953e+10 0.13485057 0.037373215 -20.932311 49.584613 6519.1525 4.9051929e+10 0.14618936 0.038058603 -21.033433 49.492216 6521.4254 4.3512998e+10 0.15767451 0.038743992 -21.136493 49.397083 6523.6983 3.8316737e+10 0.16433454 0.039352194 -21.239555 49.301948 6525.9712 3.3817794e+10 0.16830665 0.039671369 -21.342629 49.206804 6528.2441 2.9920951e+10 0.17294464 0.041636164 -21.445702 49.111660 6530.5170 2.6519577e+10 0.17579804 0.044552556 -21.548767 49.016524 6532.7900 2.3532048e+10 0.17830391 0.047344115 -21.651827 48.921391 6535.0629 2.0869782e+10 0.17902208 0.048197029 -21.754315 48.826258 6537.3358 1.8529249e+10 0.17864051 0.048843523 -21.853410 48.731125 6539.6087 1.6425374e+10 0.17828927 0.050380402 -21.952506 48.635992 6541.8816 1.4641198e+10 0.17660999 0.051040644 -22.051603 48.540860 6544.1545 1.3090604e+10 0.17466332 0.051769660 -22.150699 48.445729 6546.4274 1.1775922e+10 0.17263433 0.052816189 -22.249796 48.350596 6548.7003 1.0641814e+10 0.17022449 0.053876774 -22.348905 48.255451 6550.9732 9.5933870e+09 0.16723276 0.055229037 -22.448014 48.160305 6553.2461 8.6553990e+09 0.16392120 0.055211361 -22.547116 48.065168 6555.5190 7.8044546e+09 0.15969873 0.054417285 -22.646212 47.970036 6557.7919 7.0813651e+09 0.15586314 0.053369743 -22.744586 47.875414 6560.0648 6.4816197e+09 0.15223901 0.052215881 -22.830204 47.789796 6562.3377 5.9908595e+09 0.14876926 0.050558563 -22.915822 47.704177 6564.6106 5.5549298e+09 0.14555272 0.048494868 -23.003823 47.616177 6566.8835 5.1401463e+09 0.14294439 0.046683083 -23.098955 47.521045 6569.1564 4.7412713e+09 0.14043526 0.044862605 -23.194087 47.425914 6571.4293 4.3712083e+09 0.13852889 0.044386019 -23.286344 47.330772 6573.7022 4.0523043e+09 0.13586765 0.043093961 -23.377525 47.235627 6575.9751 3.7524821e+09 0.13308568 0.041396345 -23.468703 47.140484 6578.2480 3.4600000e+09 0.13019197 0.038257937 -23.559871 47.045351 6580.5209 3.1886723e+09 0.12712527 0.036039329 -23.651040 46.950218 6582.7938 2.9220831e+09 0.12454676 0.035077767 -23.744913 46.855086 6585.0667 2.6852262e+09 0.12188517 0.033917409 -23.840045 46.759955 6587.3397 2.4723736e+09 0.11914999 0.033233623 -23.933912 46.664191 6589.6126 2.2782735e+09 0.11629325 0.031830721 -24.021116 46.565095 6591.8855 2.1149998e+09 0.11279542 0.028202771 -24.108321 46.465999 6594.1584 1.9648669e+09 0.10931061 0.026085589 -24.198057 46.369418 6596.4313 1.8337306e+09 0.10540806 0.025725313 -24.289238 46.274273 6598.7042 1.7076076e+09 0.10225610 0.025070968 -24.379965 46.179129 6600.9771 1.5842505e+09 0.10088206 0.026998565 -24.467169 46.083997 6603.2500 1.4662846e+09 0.098569186 0.026515285 -24.554373 45.988866 6605.5229 1.3565448e+09 0.096807488 0.027103702 -24.641578 45.893734 6607.7958 1.2615732e+09 0.094119246 0.024135610 -24.728782 45.798601 6610.0687 1.1743502e+09 0.090776839 0.024068614 -24.815986 45.703468 6612.3416 1.0970120e+09 0.088702500 0.024065523 -24.903191 45.608337 6614.6145 1.0245197e+09 0.087913848 0.023517125 -24.990396 45.513205 6616.8874 9.5370225e+08 0.086784202 0.023421577 -25.075443 45.415903 6619.1603 8.9031095e+08 0.086367968 0.024564595 -25.158695 45.316793 6621.4332 8.3358110e+08 0.085698889 0.024945856 -25.242038 45.217777 6623.7061 7.7897162e+08 0.084138090 0.024753432 -25.329243 45.122644 6625.9790 7.3223627e+08 0.083106823 0.026565872 -25.416447 45.027511 6628.2519 6.8575464e+08 0.081519650 0.025805380 -25.501667 44.932379 6630.5248 6.4244490e+08 0.080088619 0.025929595 -25.584908 44.837248 6632.7977 6.0161604e+08 0.078709720 0.026128000 -25.668149 44.742117 6635.0706 5.5900972e+08 0.077380978 0.026410381 -25.751390 44.646984 6637.3435 5.2201638e+08 0.076001896 0.025993155 -25.834630 44.551851 6639.6164 4.8868232e+08 0.075511373 0.025407742 -25.916072 44.454909 6641.8894 4.5581488e+08 0.075893648 0.025151320 -25.995360 44.355799 6644.1623 4.2559423e+08 0.074891742 0.025361143 -26.074648 44.256690 6646.4352 3.9622434e+08 0.073869353 0.026145400 -26.153926 44.161289 6648.7081 3.7489733e+08 0.072609064 0.027438265 -26.233203 44.066156 6650.9810 3.5223999e+08 0.072076686 0.026479808 -26.314104 43.971024 6653.2539 3.2942455e+08 0.071587813 0.027655280 -26.397344 43.875892 6655.5268 3.0973960e+08 0.070006977 0.027827881 -26.480584 43.780761 6657.7997 2.8654791e+08 0.068462123 0.029828715 -26.560309 43.685629 6660.0726 2.6971340e+08 0.067192642 0.031691973 -26.639587 43.590496 6662.3455 2.5244498e+08 0.066016870 0.032850432 -26.717424 43.493915 6664.6184 2.4114104e+08 0.065331238 0.029943414 -26.792747 43.394806 6666.8913 2.2941393e+08 0.065340932 0.027082276 -26.868069 43.295696 6669.1642 2.1502443e+08 0.064397719 0.028187056 -26.955062 43.189925 6671.4371 1.9944364e+08 0.064683233 0.026871577 -27.044250 43.082901 6673.7100 1.8462566e+08 0.064205015 0.028521089 -27.125125 42.983001 6675.9829 1.7356893e+08 0.062046084 0.031680998 -27.200438 42.887868 6678.2558 1.5970355e+08 0.061116456 0.030765512 -27.275751 42.792736 6680.5287 1.4998668e+08 0.061650508 0.029555590 -27.351063 42.697604 6682.8016 1.4276646e+08 0.062350897 0.031037016 -27.426375 42.602473 6685.0745 1.3835675e+08 0.062182018 0.032783560 -27.501694 42.505140 6687.3474 1.3370657e+08 0.060190878 0.034149132 -27.577018 42.406030 6689.6203 1.2245859e+08 0.057690143 0.033457620 -27.652634 42.306674 6691.8932 1.1142980e+08 0.056559661 0.032790517 -27.737362 42.199648 6694.1661 1.0073110e+08 0.055518283 0.031028163 -27.822091 42.092622 6696.4391 93538923. 0.055194741 0.029858202 -27.896268 41.994977 6698.7120 92712689. 0.053992963 0.031195057 -27.967617 41.899845 6700.9849 88841903. 0.051994591 0.031398216 -28.040020 41.804714 6703.2578 85192236. 0.051589685 0.034320241 -28.115332 41.709581 6705.5307 78392015. 0.051315339 0.037612026 -28.190645 41.614448 6707.8036 73233367. 0.050403694 0.040071716 -28.269640 41.507165 6710.0765 70493893. 0.047673675 0.040511464 -28.349910 41.395680 6712.3494 65016461. 0.034360677 0.042478640 -28.425719 41.292374 6714.6223 62000285. 0.041743699 0.047350192 -28.497078 41.197228 6716.8952 58075425. 0.061514111 0.049719890 -28.568437 41.102083