# # 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 = 33.813734 km # Date (UTC) = 2016-12-15T10:17:13.373 # Date (julian) = 2457737.92862700 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6538.0311 1.5299856e+10 0.17894945 0.049171845 -35.622801 49.412032 6540.3859 1.3858574e+10 0.17743714 0.051036417 -35.729572 49.313472 6542.7407 1.2459708e+10 0.17473661 0.051283442 -35.835717 49.214911 6545.0955 1.1226336e+10 0.17280609 0.052456422 -35.938396 49.116340 6547.4502 1.0120928e+10 0.17049711 0.053458576 -36.041075 49.017769 6549.8050 9.1295810e+09 0.16863482 0.054786633 -36.146694 48.919207 6552.1598 8.2583871e+09 0.16669028 0.055546554 -36.253467 48.820647 6554.5145 7.4852530e+09 0.16418253 0.054843178 -36.359077 48.722088 6556.8693 6.8084913e+09 0.16166301 0.053885322 -36.461742 48.623528 6559.2241 6.2085332e+09 0.15832207 0.052361890 -36.564407 48.524969 6561.5788 5.6639599e+09 0.15480618 0.051087438 -36.663589 48.426411 6563.9336 5.1557577e+09 0.15083795 0.048848387 -36.762147 48.327853 6566.2884 4.6821346e+09 0.14743652 0.047019744 -36.862407 48.229289 6568.6432 4.2448572e+09 0.14414573 0.045180447 -36.965086 48.130717 6570.9979 3.8558802e+09 0.14072270 0.044504133 -37.067765 48.032144 6573.3527 3.5127862e+09 0.13676518 0.043374449 -37.166414 47.933586 6575.7075 3.2059965e+09 0.13211460 0.041664894 -37.264974 47.835028 6578.0622 2.9320727e+09 0.12701949 0.038551331 -37.363532 47.736469 6580.4170 2.6843596e+09 0.12206821 0.036135375 -37.462090 47.637910 6582.7718 2.4655442e+09 0.11829039 0.035083771 -37.560204 47.539351 6585.1266 2.2591359e+09 0.11544415 0.033869598 -37.654656 47.440793 6587.4813 2.0650419e+09 0.11338537 0.033265012 -37.749108 47.342235 6589.8361 1.8998570e+09 0.11120063 0.031387246 -37.837210 47.250302 6592.1909 1.7617945e+09 0.10843000 0.027888141 -37.922226 47.161589 6594.5456 1.6480852e+09 0.10570540 0.025872997 -38.007241 47.072876 6596.9004 1.5413056e+09 0.10272657 0.025723180 -38.101389 46.974638 6599.2552 1.4283871e+09 0.10078051 0.024945078 -38.195843 46.876080 6601.6099 1.3204477e+09 0.10046622 0.027332939 -38.290295 46.777521 6603.9647 1.2177965e+09 0.098788574 0.026092165 -38.384747 46.678962 6606.3195 1.1271443e+09 0.098104655 0.026929857 -38.479200 46.580401 6608.6743 1.0456712e+09 0.095016251 0.023714544 -38.573664 46.481829 6611.0290 9.6419491e+08 0.091576923 0.024939945 -38.668129 46.383256 6613.3838 8.8942419e+08 0.090316294 0.023714407 -38.759863 46.284694 6615.7386 8.2265943e+08 0.088529850 0.023274255 -38.850208 46.186136 6618.0933 7.6061492e+08 0.087529721 0.023841278 -38.940553 46.087577 6620.4481 7.0300290e+08 0.086499286 0.024911600 -39.030899 45.989018 6622.8029 6.5104514e+08 0.084777832 0.024544293 -39.121245 45.890458 6625.1577 6.0810922e+08 0.082914747 0.025585728 -39.211591 45.788645 6627.5124 5.7523310e+08 0.080462382 0.025514750 -39.301937 45.685980 6629.8672 5.3523021e+08 0.078848200 0.025952314 -39.394668 45.580380 6632.2220 4.9306822e+08 0.076888995 0.026058960 -39.491687 45.469500 6634.5767 4.4621092e+08 0.075604428 0.026368912 -39.586631 45.360994 6636.9315 4.0433864e+08 0.074526842 0.026188012 -39.672880 45.262422 6639.2863 3.7497999e+08 0.074195463 0.025525754 -39.759130 45.163849 6641.6410 3.4611154e+08 0.075232998 0.025150477 -39.845373 45.065288 6643.9958 3.2604377e+08 0.074551667 0.025342974 -39.931613 44.966729 6646.3506 3.0640105e+08 0.073744263 0.026101621 -40.017853 44.868171 6648.7054 2.8521717e+08 0.072704469 0.027436451 -40.104092 44.769612 6651.0601 2.6922551e+08 0.072204658 0.026530243 -40.190330 44.671052 6653.4149 2.4987268e+08 0.071677787 0.027737493 -40.272933 44.572481 6655.7697 2.3202922e+08 0.069821807 0.027928244 -40.355076 44.473909 6658.1244 2.1692300e+08 0.067893219 0.030281771 -40.439075 44.373482 6660.4792 2.0084413e+08 0.065927112 0.032061574 -40.525313 44.270817 6662.8340 1.8607559e+08 0.064032780 0.032576361 -40.611476 44.168227 6665.1887 1.7155043e+08 0.062732509 0.028237859 -40.693611 44.069667 6667.5435 1.6126417e+08 0.061417308 0.027303102 -40.775744 43.971109 6669.8983 1.5156530e+08 0.059849436 0.027433097 -40.857875 43.872550 6672.2531 1.4441466e+08 0.058735422 0.027026277 -40.940006 43.773991 6674.6078 1.3120333e+08 0.056461521 0.029467536 -41.022972 43.673611 6676.9626 1.1858143e+08 0.052866260 0.032334115 -41.110754 43.562731 6679.3174 1.1008880e+08 0.051302905 0.030005510 -41.198535 43.451852 6681.6721 1.0316666e+08 0.051196546 0.030173015 -41.280773 43.353074 6684.0269 1.0480554e+08 0.051110396 0.032655457 -41.362916 43.254502 6686.3817 98945666. 0.049195012 0.033983153 -41.442801 43.155937 6688.7365 94415712. 0.045327871 0.033955189 -41.520826 43.057379 6691.0912 86123557. 0.042486569 0.032979740 -41.599958 42.956899 6693.4460 77115207. 0.039134693 0.031451085 -41.687738 42.841398 6695.8008 74725352. 0.036878812 0.029712383 -41.775517 42.725898 6698.1555 66533083. 0.030719989 0.030431307 -41.854042 42.626474 6700.5103 62539468. 0.019528074 0.031046227 -41.932068 42.527915 6702.8651 59686650. -0.034998821 0.033567498 -42.010094 42.429356 6705.2198 55147488. 0.0050175379 0.037059450 -42.088119 42.330798 6707.5746 53017739. 0.11096702 0.040104513 -42.166549 42.231269