# # 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 = 45.402992 km # Date (UTC) = 2016-12-24T09:34:57.747 # Date (julian) = 2457746.89927948 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6518.5241 3.8808684e+10 0.14788603 0.037869096 113.45025 27.813331 6520.8848 3.5113158e+10 0.15966613 0.038580973 113.50378 27.702157 6523.2456 3.1374928e+10 0.16795358 0.039239977 113.55730 27.590998 6525.6063 2.8056353e+10 0.17256931 0.039713017 113.61082 27.479838 6527.9671 2.5100883e+10 0.17664760 0.041418574 113.66698 27.368678 6530.3278 2.2451492e+10 0.17941367 0.044287630 113.72462 27.257518 6532.6886 2.0126792e+10 0.18133022 0.047259412 113.78138 27.146358 6535.0493 1.8093485e+10 0.18162623 0.048202907 113.83490 27.035198 6537.4101 1.6324210e+10 0.18071193 0.048878549 113.88843 26.924038 6539.7708 1.4723391e+10 0.18002206 0.050576665 113.93873 26.812866 6542.1316 1.3276670e+10 0.17768981 0.051052182 113.98814 26.701691 6544.4923 1.1980093e+10 0.17565508 0.052043709 114.03901 26.590521 6546.8530 1.0830525e+10 0.17354327 0.053166444 114.09253 26.479362 6549.2138 9.8216218e+09 0.17084904 0.054184151 114.14605 26.368203 6551.5745 8.9309645e+09 0.16846731 0.055437423 114.19957 26.257042 6553.9353 8.1522019e+09 0.16495742 0.054864911 114.25309 26.145882 6556.2960 7.4711982e+09 0.16106789 0.053969603 114.30662 26.034722 6558.6568 6.8829287e+09 0.15635435 0.052679646 114.36014 25.923562 6561.0175 6.3477207e+09 0.15090305 0.051364043 114.41338 25.812401 6563.3783 5.8698141e+09 0.14642265 0.049490789 114.46279 25.701226 6565.7390 5.4332222e+09 0.14264626 0.047479227 114.51220 25.590051 6568.0998 5.0223396e+09 0.14039410 0.045679950 114.56424 25.478886 6570.4605 4.6559373e+09 0.13832056 0.044726747 114.61776 25.367726 6572.8213 4.3091886e+09 0.13609311 0.043759839 114.67042 25.256567 6575.1820 3.9897069e+09 0.13356013 0.042192093 114.71982 25.145407 6577.5428 3.7052752e+09 0.13067982 0.039367829 114.76922 25.034246 6579.9035 3.4182243e+09 0.12784476 0.036573800 114.82185 24.926305 6582.2643 3.1556006e+09 0.12521742 0.035221884 114.87537 24.819262 6584.6250 2.9167849e+09 0.12275237 0.034175049 114.92744 24.710761 6586.9857 2.6969883e+09 0.12037770 0.033158554 114.97685 24.599586 6589.3465 2.5145009e+09 0.11785750 0.032358562 115.02626 24.488411 6591.7072 2.3438752e+09 0.11480994 0.028403869 115.07567 24.377249 6594.0680 2.1787436e+09 0.11183393 0.026135201 115.12507 24.266089 6596.4287 2.0309413e+09 0.10846637 0.025725325 115.17448 24.154930 6598.7895 1.8901095e+09 0.10585646 0.025030238 115.22388 24.043770 6601.1502 1.7662924e+09 0.10507934 0.027116440 115.27328 23.932883 6603.5110 1.6687876e+09 0.10303772 0.026360776 115.32269 23.825826 6605.8717 1.5730620e+09 0.10170009 0.027396352 115.37211 23.718769 6608.2325 1.4846152e+09 0.098485928 0.023726225 115.42151 23.609094 6610.5932 1.3936324e+09 0.094425751 0.024569788 115.47092 23.497934 6612.9540 1.3098179e+09 0.092308316 0.023607984 115.52032 23.386774 6615.3147 1.2398945e+09 0.090567493 0.023261215 115.56973 23.275614 6617.6755 1.1731250e+09 0.089518254 0.023663197 115.61913 23.164454 6620.0362 1.1086872e+09 0.089186838 0.024778866 115.66974 23.046066 6622.3970 1.0335642e+09 0.088232721 0.024652336 115.72069 22.925641 6624.7577 9.6299455e+08 0.087014707 0.025267905 115.77068 22.810970 6627.1185 9.0028506e+08 0.085345898 0.025362566 115.82008 22.699810 6629.4792 8.4514439e+08 0.084541026 0.026022464 115.86949 22.589439 6631.8399 8.0468441e+08 0.082957978 0.026016087 115.91890 22.482382 6634.2007 7.6063723e+08 0.081669908 0.026341482 115.96831 22.375325 6636.5614 7.1964988e+08 0.080348507 0.026331722 116.01458 22.265135 6638.9222 6.8013916e+08 0.079362886 0.025631465 116.05986 22.153975 6641.2829 6.3758604e+08 0.080225393 0.025149261 116.10515 22.044192 6643.6437 6.0666330e+08 0.079534279 0.025289807 116.15043 21.937149 6646.0044 5.7883641e+08 0.078442694 0.025922440 116.19572 21.830105 6648.3652 5.4841955e+08 0.077356568 0.027208735 116.25033 21.706749 6650.7259 5.1779379e+08 0.076730110 0.026421422 116.30591 21.581691 6653.0867 4.8032797e+08 0.076395801 0.027569913 116.35381 21.470073 6655.4474 4.4932339e+08 0.074891452 0.027795090 116.39911 21.363017 6657.8082 4.2402527e+08 0.073114939 0.029838558 116.44440 21.255965 6660.1689 3.9601426e+08 0.071577660 0.031779531 116.48969 21.148922 6662.5297 3.7717177e+08 0.069956983 0.032747101 116.53498 21.041879 6664.8904 3.6140462e+08 0.069046327 0.028948125 116.58026 20.931175 6667.2512 3.4599884e+08 0.068606855 0.027195711 116.62555 20.820015 6669.6119 3.3030136e+08 0.067789314 0.027727237 116.67557 20.704591 6671.9726 3.0866309e+08 0.067907728 0.026879210 116.73115 20.584166 6674.3334 2.8876500e+08 0.067121628 0.029236033 116.78363 20.467770 6676.6941 2.7283549e+08 0.064904245 0.032161096 116.82892 20.360727 6679.0549 2.5698269e+08 0.064257446 0.030222412 116.87421 20.253684 6681.4156 2.4591902e+08 0.065471188 0.029976230 116.92443 20.134970 6683.7764 2.3319238e+08 0.065939738 0.032326382 116.97538 20.014544 6686.1371 2.2108263e+08 0.065326016 0.033840870 117.01936 19.900716 6688.4979 2.0751187e+08 0.062481097 0.033900118 117.06054 19.789540 6690.8586 1.9603073e+08 0.060982330 0.033017464 117.10288 19.679541 6693.2194 1.8901999e+08 0.059992334 0.031528830 117.14817 19.572499 6695.5801 1.8266348e+08 0.059438106 0.029752912 117.19346 19.465457 6697.9409 1.7496318e+08 0.058599078 0.030210334 117.24359 19.346964 6700.3016 1.6286749e+08 0.056729213 0.030891436 117.29454 19.226538 6702.6624 1.5352486e+08 0.055563702 0.033405630 117.34154 19.115435 6705.0231 1.4750471e+08 0.055751139 0.036709692 117.38683 19.008392 6707.3839 1.4364725e+08 0.055290233 0.040131839 117.43240 18.897767 6709.7446 1.3942349e+08 0.054270717 0.040658938 117.47871 18.777341 6712.1054 1.2728421e+08 0.051882880 0.042025563 117.52553 18.656913 6714.4661 1.1646185e+08 0.049511352 0.047338450 117.57649 18.536470 6716.8268 1.1003498e+08 0.047347015 0.049619230 117.62745 18.416027 6719.1876 1.0338953e+08 0.044941000 0.051191610 117.66911 18.308313 6721.5483 1.0228006e+08 0.045460887 0.050469117 117.71028 18.201270 6723.9091 97273135. 0.043647988 0.049875958 117.75655 18.087255 6726.2698 92710952. 0.039732751 0.040953801 117.80749 17.966830 6728.6306 87481103. 0.039201327 0.040521843 117.85490 17.851249 6730.9913 78292814. 0.037315623 0.041738138 117.89607 17.744206 6733.3521 72376464. 0.036013984 0.045835840 117.93725 17.637163 6735.7128 69614470. 0.037139802 0.050050149 117.98754 17.517633 6738.0736 69769441. 0.038924914 0.057726140 118.03849 17.397208 6740.4343 72189816. 0.038823978 0.064792322 118.08586 17.276783 6742.7951 73188676. 0.035762178 0.070548082 118.13217 17.156358 6745.1558 68647406. 0.032040680 0.078632389 118.17849 17.038771 6747.5166 64071250. 0.027349058 0.067183329 118.22482 16.922960 6749.8773 60288748. 0.024746128 0.072037725 118.27114 16.805043 6752.2381 56827040. 0.020951134 0.073859001 118.31745 16.684618 6754.5988 57005320. 0.018671289 0.075250521 118.36346 16.568172 6756.9596 52827026. 0.013431116 0.076635973 118.40875 16.461128 6759.3203 47097890. 0.0086476068 0.075897247 118.45404 16.354085 6761.6810 44603467. -0.018781838 0.078024492 118.50022 16.235420 6764.0418 42532889. 0.0075739061 0.079485288 118.54654 16.114995 6766.4025 44328534. 0.062765199 0.080624298 118.59286 15.997855