# # 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 = 43.590822 km # Date (UTC) = 2017-01-02T10:04:40.057 # Date (julian) = 2457755.91990807 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6512.9722 5.0833891e+10 0.11821002 0.036194943 105.48735 31.248284 6515.1993 4.5532855e+10 0.12931847 0.036866514 105.54589 31.138644 6517.4264 4.0522113e+10 0.14050411 0.037538085 105.60707 31.020649 6519.6535 3.5879526e+10 0.15177835 0.038209656 105.66825 30.902655 6521.8805 3.1816301e+10 0.16319132 0.038881227 105.72393 30.795269 6524.1076 2.8392232e+10 0.16872431 0.039465193 105.77831 30.690403 6526.3347 2.5599894e+10 0.17308032 0.040018984 105.83268 30.585537 6528.5618 2.3187367e+10 0.17702024 0.041888149 105.88706 30.480671 6530.7889 2.1069259e+10 0.17957905 0.044933099 105.94143 30.375804 6533.0160 1.9095548e+10 0.18226650 0.047526366 105.99741 30.259426 6535.2430 1.7171485e+10 0.18244783 0.048118869 106.05421 30.137080 6537.4701 1.5448312e+10 0.18210492 0.048906866 106.11011 30.021202 6539.6972 1.3926393e+10 0.18149681 0.050487572 106.16449 29.916336 6541.9243 1.2676441e+10 0.17924849 0.051026792 106.21887 29.811470 6544.1514 1.1604277e+10 0.17668386 0.051767140 106.27325 29.706593 6546.3785 1.0627943e+10 0.17389928 0.052775930 106.32763 29.601713 6548.6055 9.7545876e+09 0.17081770 0.053848479 106.38255 29.493939 6550.8326 8.9055015e+09 0.16707749 0.055193840 106.43935 29.375963 6553.0597 8.1447056e+09 0.16341428 0.055305057 106.49616 29.257986 6555.2868 7.4719057e+09 0.15937144 0.054612398 106.54707 29.152232 6557.5139 6.9190116e+09 0.15569394 0.053544014 106.59756 29.047366 6559.7409 6.4596309e+09 0.15230718 0.052303549 106.64944 28.942500 6561.9680 6.0170594e+09 0.14888101 0.050895656 106.70382 28.837633 6564.1951 5.6083230e+09 0.14527491 0.048683171 106.75819 28.732767 6566.4222 5.2015387e+09 0.14260076 0.046944048 106.81447 28.617637 6568.6493 4.8035966e+09 0.14027307 0.045174818 106.87127 28.499661 6570.8764 4.4284399e+09 0.13826826 0.044554489 106.92496 28.388159 6573.1034 4.0953288e+09 0.13605940 0.043574467 106.97546 28.283279 6575.3305 3.8180228e+09 0.13336508 0.042043081 107.02596 28.178398 6577.5576 3.5772671e+09 0.13037033 0.039344496 107.07645 28.073531 6579.7847 3.3646120e+09 0.12716065 0.036639115 107.12694 27.968664 6582.0118 3.1511864e+09 0.12421115 0.035290589 107.17961 27.859272 6584.2389 2.9307058e+09 0.12134357 0.034385393 107.23642 27.741296 6586.4659 2.7103667e+09 0.11871963 0.033165273 107.29264 27.624061 6588.6930 2.5209572e+09 0.11619309 0.033148491 107.33925 27.519196 6590.9201 2.3642306e+09 0.11283812 0.029350513 107.38586 27.414330 6593.1472 2.2241561e+09 0.10975997 0.026965373 107.43738 27.303146 6595.3743 2.0816164e+09 0.10624701 0.025662385 107.49418 27.185169 6597.6014 1.9282860e+09 0.10308302 0.025532960 107.54901 27.069725 6599.8284 1.7917811e+09 0.10110012 0.024979557 107.59563 26.964844 6602.0555 1.6738561e+09 0.099793517 0.027469248 107.64224 26.859964 6604.2826 1.5739964e+09 0.097885520 0.026239082 107.69125 26.755092 6606.5097 1.4899671e+09 0.097062927 0.026588059 107.74174 26.650226 6608.7368 1.4093360e+09 0.094420427 0.023712891 107.79232 26.544780 6610.9639 1.3231218e+09 0.091641026 0.024923925 107.84476 26.426804 6613.1909 1.2353243e+09 0.090961016 0.023643648 107.89719 26.308828 6615.4180 1.1554902e+09 0.089927384 0.023264393 107.94522 26.203693 6617.6451 1.0879267e+09 0.089226297 0.023653133 107.99183 26.102711 6619.8722 1.0365828e+09 0.088777686 0.024736360 108.04028 25.998654 6622.0993 9.7944671e+08 0.087785673 0.024731569 108.09708 25.880677 6624.3264 9.1495133e+08 0.086298213 0.025037008 108.15389 25.762700 6626.5534 8.5834792e+08 0.084992421 0.025885767 108.20160 25.656410 6628.7805 8.0920333e+08 0.083815989 0.026019996 108.24821 25.551530 6631.0076 7.7157054e+08 0.082204486 0.025931539 108.29667 25.442485 6633.2347 7.3023306e+08 0.081005318 0.026193228 108.34911 25.324509 6635.4618 6.8617916e+08 0.079623844 0.026469038 108.40137 25.207032 6637.6889 6.4945421e+08 0.078442052 0.025824030 108.44798 25.106050 6639.9159 6.1373855e+08 0.078222450 0.025300697 108.49458 25.005068 6642.1430 5.8446198e+08 0.078292028 0.025157549 108.54185 24.896359 6644.3701 5.4857882e+08 0.077275709 0.025383607 108.58992 24.778382 6646.5972 5.1149392e+08 0.076216393 0.026229272 108.63774 24.663228 6648.8243 4.7572445e+08 0.075009815 0.027516055 108.68435 24.562246 6651.0514 4.3652579e+08 0.074684715 0.026523522 108.73095 24.461264 6653.2784 4.0725307e+08 0.074363116 0.027667823 108.78101 24.350221 6655.5055 3.7995251e+08 0.073093037 0.027819099 108.83346 24.232227 6657.7326 3.5801461e+08 0.071725175 0.029750910 108.88295 24.118212 6659.9597 3.4199624e+08 0.070510195 0.031634406 108.92568 24.013346 6662.1868 3.2670719e+08 0.069180162 0.032939481 108.96840 23.908480 6664.4139 3.1088305e+08 0.068250202 0.030691812 109.01820 23.797247 6666.6409 2.9255816e+08 0.068283585 0.027033490 109.07063 23.683640 6668.8680 2.7112159e+08 0.067255286 0.028238911 109.11879 23.573878 6671.0951 2.5589318e+08 0.067363092 0.026866704 109.16151 23.469012 6673.3222 2.4989467e+08 0.066792422 0.027941072 109.20424 23.364145 6675.5493 2.4176086e+08 0.064767539 0.030850411 109.25536 23.251717 6677.7764 2.3134079e+08 0.063225847 0.031254551 109.30780 23.138111 6680.0034 2.1781805e+08 0.063267809 0.029442158 109.35771 23.024504 6682.2305 2.0540523e+08 0.063857481 0.030600668 109.40578 22.910897 6684.4576 1.9802953e+08 0.063766784 0.032677313 109.45231 22.799802 6686.6847 1.9151770e+08 0.062302244 0.034159445 109.49503 22.694922 6688.9118 1.8003038e+08 0.059172630 0.033995658 109.53776 22.590041 6691.1389 1.7232363e+08 0.057932347 0.032968503 109.58430 22.478934 6693.3659 1.6417006e+08 0.056767104 0.031478551 109.63237 22.365327 6695.5930 1.5580012e+08 0.056091446 0.029750543 109.68043 22.249863 6697.8201 1.4686239e+08 0.055064122 0.030195051 109.72849 22.131888 6700.0472 1.4006049e+08 0.053217589 0.030702716 109.77582 22.016229 6702.2743 1.3770233e+08 0.051634830 0.033095734 109.81855 21.915247 6704.5014 1.3633362e+08 0.051982629 0.036423743 109.86127 21.814265 6706.7284 1.3065518e+08 0.051710613 0.039714186 109.90699 21.706192 6708.9555 1.1560353e+08 0.050747787 0.041084102 109.95506 21.592584 6711.1826 1.0505311e+08 0.048663149 0.040899981 110.00312 21.478977 6713.4097 94945265. 0.046188477 0.045168358 110.05119 21.365370 6715.6368 89063311. 0.044138751 0.048029854 110.09925 21.251762 6717.8638 86636685. 0.042151273 0.049820835 110.14732 21.133854 6720.0909 84408029. 0.041124572 0.050409230 110.19538 21.015878 6722.3180 84466575. 0.041299216 0.050212055 110.24345 20.900930 6724.5451 82222555. 0.038197949 0.045374743 110.29152 20.787306 6726.7722 78785051. 0.035541281 0.040958332 110.33781 20.673689 6728.9993 74864924. 0.035137254 0.041044385 110.38151 20.560083 6731.2263 71614408. 0.033234085 0.042200498 110.42508 20.447979 6733.4534 70796325. 0.032171449 0.046386113 110.46781 20.346997 6735.6805 65486170. 0.032689575 0.050015848 110.51053 20.246015 6737.9076 63620475. 0.033839789 0.057026737 110.55616 20.138160 6740.1347 61442032. 0.033005449 0.064280439 110.60423 20.024553 6742.3618 58508811. 0.029110024 0.069492254 110.65117 19.910947 6744.5888 58639952. 0.023499848 0.078248869 110.69487 19.797340 6746.8159 54425845. 0.015460985 0.069501192 110.73856 19.683733 6749.0430 49375660. 0.0055109659 0.072266157 110.78226 19.570126 6751.2701 46905334. -0.046480580 0.073825869 110.82595 19.456519 6753.4972 44669670. -0.012386844 0.074586249 110.87261 19.342912 6755.7243 45481093. 0.073516021 0.074287803 110.92068 19.229304