# # 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 = 44.267985 km # Date (UTC) = 2016-12-28T09:26:05.206 # Date (julian) = 2457750.89311581 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6514.2168 4.5467184e+10 0.12530238 0.036570254 115.42014 29.266154 6516.4535 4.0707512e+10 0.13643814 0.037244706 115.47476 29.160825 6518.6901 3.6368006e+10 0.14767497 0.037919157 115.52937 29.055509 6520.9267 3.2629264e+10 0.15905972 0.038593608 115.58397 28.950193 6523.1634 2.9380938e+10 0.16731878 0.039219602 115.63654 28.842835 6525.4000 2.6523895e+10 0.17247024 0.039736564 115.68725 28.733619 6527.6366 2.3959189e+10 0.17659343 0.041178673 115.73795 28.624403 6529.8733 2.1665073e+10 0.17991215 0.043626822 115.79240 28.518930 6532.1099 1.9565744e+10 0.18207218 0.046776002 115.84701 28.413614 6534.3465 1.7653594e+10 0.18234843 0.048041497 115.90008 28.308292 6536.5832 1.5946071e+10 0.18162017 0.048312280 115.95080 28.202962 6538.8198 1.4429417e+10 0.18098763 0.049555884 116.00151 28.097632 6541.0564 1.3098266e+10 0.17939492 0.051308225 116.05222 27.992313 6543.2931 1.1883619e+10 0.17727163 0.051458813 116.10293 27.886997 6545.5297 1.0789199e+10 0.17469071 0.052460313 116.15363 27.781681 6547.7663 9.8110772e+09 0.17202290 0.053578792 116.20434 27.676366 6550.0030 8.9397597e+09 0.16904038 0.054986106 116.25505 27.571051 6552.2396 8.1963196e+09 0.16489468 0.055526455 116.30576 27.465725 6554.4763 7.5618442e+09 0.16028719 0.054842374 116.35648 27.360394 6556.7129 6.9945076e+09 0.15612222 0.053908318 116.40809 27.253199 6558.9495 6.4152135e+09 0.15212320 0.052430196 116.46514 27.134717 6561.1862 5.8196997e+09 0.14876573 0.051280947 116.52218 27.016234 6563.4228 5.2539360e+09 0.14578882 0.049439295 116.57376 26.909114 6565.6594 4.7623432e+09 0.14297585 0.047569610 116.62447 26.803798 6567.8961 4.3601517e+09 0.14082812 0.045859545 116.67518 26.698481 6570.1327 4.0027468e+09 0.13889075 0.044862542 116.72589 26.593165 6572.3693 3.6953060e+09 0.13664033 0.044018650 116.77659 26.487849 6574.6060 3.4345698e+09 0.13396534 0.042563962 116.82443 26.382534 6576.8426 3.2103849e+09 0.13119767 0.040401543 116.87124 26.277218 6579.0792 3.0073016e+09 0.12779479 0.037026939 116.91872 26.172571 6581.3159 2.8142065e+09 0.12501594 0.035500959 116.96943 26.071142 6583.5525 2.6375182e+09 0.12243946 0.034742013 117.02014 25.969713 6585.7891 2.4764221e+09 0.11965233 0.033339874 117.06848 25.865919 6588.0258 2.3252126e+09 0.11737087 0.033371323 117.11529 25.760603 6590.2624 2.1738834e+09 0.11439308 0.030573944 117.16227 25.655286 6592.4990 2.0347772e+09 0.11116766 0.027588802 117.21298 25.549970 6594.7357 1.9069124e+09 0.10791571 0.025768671 117.26369 25.444654 6596.9723 1.7859170e+09 0.10440367 0.025722853 117.31533 25.333005 6599.2089 1.6601535e+09 0.10184773 0.024942297 117.36799 25.214523 6601.4456 1.5345752e+09 0.10095038 0.027255535 117.41947 25.099490 6603.6822 1.4229562e+09 0.098883791 0.026259402 117.46628 24.998061 6605.9189 1.3277169e+09 0.097954085 0.027435889 117.51309 24.896632 6608.1555 1.2471343e+09 0.095524545 0.023728260 117.55990 24.792720 6610.3921 1.1721172e+09 0.092642880 0.024377644 117.60671 24.687403 6612.6288 1.1007997e+09 0.091232567 0.023850967 117.65352 24.582087 6614.8654 1.0344277e+09 0.090447799 0.023344270 117.70032 24.476771 6617.1020 9.7587117e+08 0.089374710 0.023473076 117.74713 24.371455 6619.3387 9.2311417e+08 0.088980722 0.024607628 117.79394 24.268134 6621.5753 8.8451051e+08 0.088150230 0.024898761 117.84074 24.166718 6623.8119 8.4805365e+08 0.086427421 0.024792634 117.88755 24.065303 6626.0486 7.9847440e+08 0.085460833 0.026529023 117.93991 23.947714 6628.2852 7.4708269e+08 0.083978649 0.025818890 117.99257 23.829232 6630.5218 6.9429067e+08 0.082668492 0.025929588 118.04131 23.719547 6632.7585 6.4893739e+08 0.081365185 0.026123292 118.08812 23.614217 6634.9951 6.1421311e+08 0.080014859 0.026399431 118.13452 23.509300 6637.2317 5.8062550e+08 0.078570143 0.026047911 118.17743 23.407885 6639.4684 5.5162219e+08 0.077900069 0.025460666 118.22034 23.306470 6641.7050 5.2145039e+08 0.078318866 0.025150694 118.26853 23.195807 6643.9416 4.8817473e+08 0.077386645 0.025334796 118.32119 23.077324 6646.1783 4.5242331e+08 0.076449465 0.026012432 118.37231 22.963329 6648.4149 4.2135790e+08 0.075384082 0.027242032 118.41912 22.861914 6650.6516 3.9672294e+08 0.074730075 0.026404396 118.46593 22.760499 6652.8882 3.7390799e+08 0.074306203 0.027494897 118.51001 22.656346 6655.1248 3.5806784e+08 0.073076149 0.027661793 118.55292 22.551016 6657.3615 3.4214356e+08 0.071393401 0.029320390 118.59656 22.444495 6659.5981 3.2567047e+08 0.070215111 0.031709836 118.64483 22.330402 6661.8347 3.0708151e+08 0.069114906 0.032960094 118.69310 22.216309 6664.0714 2.9050387e+08 0.068078739 0.031944977 118.74011 22.113081 6666.3080 2.7743459e+08 0.068412381 0.026968612 118.78692 22.011665 6668.5446 2.6683585e+08 0.067628931 0.027952735 118.83416 21.905242 6670.7813 2.5613146e+08 0.067669986 0.026966684 118.88243 21.786760 6673.0179 2.4241553e+08 0.067560445 0.027485991 118.93062 21.668544 6675.2545 2.2759151e+08 0.066074903 0.030285888 118.97353 21.567110 6677.4912 2.1715413e+08 0.064460843 0.031659966 119.01644 21.465695 6679.7278 2.0549043e+08 0.064597731 0.029666345 119.05934 21.364280 6681.9644 1.9855012e+08 0.065567443 0.030397263 119.10225 21.262864 6684.2011 1.9359530e+08 0.065857380 0.032664296 119.14516 21.161449 6686.4377 1.8234848e+08 0.065052696 0.034015752 119.19283 21.048770 6688.6743 1.7223701e+08 0.062403787 0.033940852 119.24111 20.934659 6690.9110 1.6182198e+08 0.061319817 0.033011464 119.28612 20.825901 6693.1476 1.5878034e+08 0.060510799 0.031553447 119.32902 20.720585 6695.3843 1.5264548e+08 0.060115156 0.029788891 119.37217 20.614876 6697.6209 1.4494418e+08 0.059568077 0.030169839 119.42044 20.500782 6699.8575 1.3766284e+08 0.058172012 0.030799186 119.46871 20.386688 6702.0942 1.2949945e+08 0.056627424 0.032951914 119.51698 20.272593 6704.3308 1.2939006e+08 0.057099216 0.036339989 119.56525 20.158499 6706.5674 1.2535907e+08 0.057125414 0.039433964 119.61090 20.050583 6708.8041 1.1804566e+08 0.056849907 0.040919172 119.65381 19.949167 6711.0407 1.1269918e+08 0.055407091 0.040738533 119.69672 19.847751 6713.2773 1.0592476e+08 0.053570300 0.044689669 119.74053 19.734626 6715.5140 1.0210238e+08 0.051834608 0.047904257 119.78441 19.620532 6717.7506 1.0035715e+08 0.049920253 0.049827840 119.83113 19.506427 6719.9872 93766216. 0.048871807 0.050431894 119.87941 19.392316 6722.2239 88127973. 0.049044196 0.050328442 119.92572 19.282855 6724.4605 85560360. 0.046147925 0.046081148 119.96862 19.181439 6726.6971 77490009. 0.043526982 0.040957655 120.01153 19.080024 6728.9338 71592938. 0.043379290 0.040951565 120.05522 18.968433 6731.1704 62189048. 0.041878834 0.042089172 120.09910 18.854339 6733.4070 56488881. 0.040970716 0.046134271 120.14528 18.740245 6735.6437 57283248. 0.042067705 0.049976746 120.19355 18.626151 6737.8803 54730145. 0.043769631 0.056939829 120.24075 18.512057 6740.1169 54133822. 0.043777911 0.064250150 120.28463 18.397963 6742.3536 51611111. 0.041360754 0.069472326 120.32851 18.283869 6744.5902 47823665. 0.037509464 0.078249932 120.36768 18.182024 6746.8269 46406817. 0.033391273 0.069374173 120.40669 18.080608 6749.0635 43584289. 0.032547141 0.072260550 120.44943 17.974084 6751.3001 44874649. 0.029248267 0.073838565 120.49770 17.859973 6753.5368 46949921. 0.027264876 0.074714340 120.54544 17.745864