# # 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 = 42.810703 km # Date (UTC) = 2016-12-15T10:43:59.703 # Date (julian) = 2457737.94721878 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6526.9184 2.2782800e+10 0.17932372 0.040630928 96.413086 25.448057 6529.0895 2.0607076e+10 0.18088899 0.042378289 96.458527 25.345816 6531.2605 1.8605170e+10 0.18238747 0.045607865 96.506793 25.240754 6533.4316 1.6814797e+10 0.18353244 0.047702993 96.556013 25.134740 6535.6026 1.5230435e+10 0.18227941 0.047962879 96.604831 25.029129 6537.7737 1.3778534e+10 0.18176961 0.049049983 96.650266 24.926900 6539.9447 1.2497900e+10 0.18085479 0.050787211 96.695702 24.824672 6542.1158 1.1360246e+10 0.17800672 0.051046201 96.741137 24.722444 6544.2869 1.0345324e+10 0.17555608 0.051877047 96.786569 24.620216 6546.4579 9.4546977e+09 0.17309201 0.052841310 96.832002 24.517988 6548.6290 8.6599813e+09 0.17071019 0.053855476 96.880563 24.415748 6550.8000 7.9425424e+09 0.16826578 0.055185677 96.929793 24.313507 6552.9711 7.2920930e+09 0.16594550 0.055342348 96.978326 24.211268 6555.1421 6.6945619e+09 0.16292129 0.054733941 97.023759 24.109039 6557.3132 6.1439606e+09 0.15937173 0.053669801 97.069192 24.006811 6559.4842 5.6527769e+09 0.15520917 0.052332524 97.114626 23.904583 6561.6553 5.2074939e+09 0.15070830 0.051049765 97.160062 23.802355 6563.8264 4.8097971e+09 0.14576325 0.048972466 97.205498 23.700128 6565.9974 4.4463695e+09 0.14135524 0.047185826 97.250934 23.597900 6568.1685 4.1157029e+09 0.13817853 0.045616803 97.296369 23.495672 6570.3395 3.8193125e+09 0.13556527 0.044776868 97.341806 23.393440 6572.5106 3.5446371e+09 0.13328451 0.043937762 97.387245 23.291198 6574.6816 3.2937819e+09 0.13082132 0.042527619 97.432683 23.188957 6576.8527 3.0524134e+09 0.12831811 0.040389932 97.478120 23.086723 6579.0237 2.8266957e+09 0.12525646 0.037057445 97.523556 22.984495 6581.1948 2.6290497e+09 0.12282143 0.035537621 97.568992 22.882266 6583.3659 2.4494889e+09 0.12072381 0.034836487 97.610725 22.780039 6585.5369 2.2795952e+09 0.11844489 0.033541525 97.652373 22.677812 6587.7080 2.1264756e+09 0.11649344 0.033315228 97.695297 22.576859 6589.8790 1.9823414e+09 0.11418186 0.031302077 97.740733 22.478417 6592.0501 1.8566068e+09 0.11132928 0.028024886 97.786168 22.379975 6594.2211 1.7476171e+09 0.10852405 0.026051132 97.831606 22.278890 6596.3922 1.6347810e+09 0.10545586 0.025725491 97.877045 22.176648 6598.5632 1.5320013e+09 0.10312755 0.025138252 97.922277 22.074407 6600.7343 1.4339776e+09 0.10237841 0.026499462 97.963925 21.972179 6602.9054 1.3357240e+09 0.10105906 0.026744038 98.005574 21.869951 6605.0764 1.2507478e+09 0.099796622 0.026729147 98.048789 21.767723 6607.2475 1.1685342e+09 0.097915766 0.025218339 98.094225 21.665495 6609.4185 1.0966265e+09 0.094397184 0.023830253 98.139660 21.563268 6611.5896 1.0319664e+09 0.091232910 0.024582478 98.182171 21.463964 6613.7606 9.6962197e+08 0.089811153 0.023852669 98.223820 21.365522 6615.9317 9.1243438e+08 0.088070572 0.023280197 98.265469 21.266582 6618.1027 8.5825102e+08 0.087532359 0.023848382 98.307123 21.164340 6620.2738 8.1149681e+08 0.087095882 0.024855430 98.348778 21.062098 6622.4449 7.6520020e+08 0.086147114 0.024639586 98.390429 20.959863 6624.6159 7.1832844e+08 0.084925170 0.025192005 98.432078 20.857635 6626.7870 6.7376338e+08 0.083488338 0.025588231 98.473727 20.755406 6628.9580 6.3077737e+08 0.082656677 0.026092063 98.518589 20.656394 6631.1291 5.9999405e+08 0.081227955 0.025943878 98.564022 20.557952 6633.3001 5.6737918e+08 0.080176195 0.026204654 98.609751 20.456062 6635.4712 5.3223550e+08 0.078980502 0.026470450 98.656606 20.341054 6637.6422 4.9796405e+08 0.078038812 0.025846858 98.703462 20.226045 6639.8133 4.6184331e+08 0.078015404 0.025337381 98.745842 20.125281 6641.9844 4.3316394e+08 0.078467702 0.025151643 98.787496 20.026826 6644.1554 4.0889061e+08 0.077630710 0.025360403 98.829149 19.927543 6646.3265 3.8749711e+08 0.076786490 0.026089139 98.870798 19.825315 6648.4975 3.6863080e+08 0.075831953 0.027297331 98.912447 19.723087 6650.6686 3.5317902e+08 0.075366640 0.026408295 98.954095 19.623049 6652.8396 3.3367151e+08 0.075110995 0.027481540 98.995744 19.524607 6655.0107 3.1424071e+08 0.074118398 0.027614635 99.037392 19.426165 6657.1818 2.9595416e+08 0.072377957 0.029111936 99.075491 19.324175 6659.3528 2.8044797e+08 0.071000556 0.031761003 99.113353 19.221946 6661.5239 2.7029986e+08 0.069698640 0.032801764 99.153879 19.117194 6663.6949 2.5948201e+08 0.068541577 0.032290634 99.200734 19.006445 6665.8660 2.4151121e+08 0.068845549 0.027128203 99.247590 18.895695 6668.0370 2.2498304e+08 0.068626116 0.027503543 99.289512 18.793017 6670.2081 2.1157657e+08 0.068567441 0.027232230 99.331166 18.690776 6672.3791 2.0122645e+08 0.068682534 0.027099356 99.372819 18.589704 6674.5502 1.9601718e+08 0.067815622 0.029418918 99.414467 18.491262 6676.7213 1.8873071e+08 0.065869890 0.032178566 99.456116 18.392820 6678.8923 1.8126526e+08 0.065375733 0.030339801 99.498395 18.286175 6681.0634 1.7197240e+08 0.066673549 0.029705970 99.540990 18.175426 6683.2344 1.6005851e+08 0.067560255 0.031532125 99.583284 18.067395 6685.4055 1.4784482e+08 0.067598235 0.033133119 99.624932 17.965166 6687.5765 1.3888968e+08 0.065775386 0.034021363 99.666581 17.862937 6689.7476 1.3198176e+08 0.063675865 0.033343077 99.705667 17.763267 6691.9186 1.2896265e+08 0.062610857 0.032784524 99.743533 17.664812 6694.0897 1.2229966e+08 0.061726166 0.031135311 99.781732 17.565902 6696.2608 1.1641843e+08 0.061560510 0.029784123 99.828588 17.455153 6698.4318 1.1060989e+08 0.060503208 0.030810525 99.875443 17.344404 6700.6029 1.0331893e+08 0.058703819 0.031114880 99.916099 17.242139 6702.7739 1.0091003e+08 0.057737088 0.033494709 99.953961 17.143698 6704.9450 93367573. 0.057812691 0.036641587 99.992050 17.044663 6707.1160 86840938. 0.057217066 0.040170205 100.03465 16.933915 6709.2871 84294394. 0.056180837 0.040949941 100.07724 16.823167 6711.4581 79191486. 0.053996517 0.041213474 100.11917 16.721039 6713.6292 77645656. 0.051578805 0.045962302 100.16082 16.622597 6715.8003 77727610. 0.049508182 0.048197066 100.20253 16.523424 6717.9713 76298062. 0.047189185 0.049814188 100.24512 16.412675 6720.1424 79011867. 0.045942681 0.050403271 100.28772 16.301926 6722.3134 74132964. 0.045431240 0.050217733 100.33032 16.191166 6724.4845 67075731. 0.041854617 0.045880959 100.37293 16.080400 6726.6555 57803036. 0.038289997 0.040957280 100.41380 15.974126 6728.8266 50462304. 0.036929609 0.040799648 100.45166 15.875684 6730.9976 46943792. 0.034302862 0.041746796 100.48952 15.777242 6733.1687 47561778. 0.032458029 0.044840233 100.53081 15.669899 6735.3398 51370328. 0.032351390 0.049654109 100.57340 15.559149 6737.5108 53719421. 0.031398944 0.055762771 100.61600 15.448400 6739.6819 53717378. 0.014413231 0.063661029 100.65859 15.337651 6741.8529 49803966. 0.026255519 0.068191280 100.70106 15.227246 6744.0240 44949057. 0.056631272 0.077811960 100.73892 15.128805