# # 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 = 40.347906 km # Date (UTC) = 2017-01-15T10:25:14.109 # Date (julian) = 2457768.93419108 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6520.0185 2.7664327e+10 0.15743670 0.038319737 99.180592 37.763968 6522.1240 2.5099607e+10 0.16771534 0.038949726 99.256130 37.631775 6524.2295 2.2533314e+10 0.17242070 0.039508499 99.330210 37.502132 6526.3350 2.0371258e+10 0.17600081 0.040019326 99.396317 37.386449 6528.4405 1.8614907e+10 0.17947351 0.041791962 99.462424 37.270765 6530.5460 1.6990387e+10 0.18184101 0.044593148 99.531978 37.142977 6532.6516 1.5416804e+10 0.18388138 0.047228494 99.602782 37.010804 6534.7571 1.3941317e+10 0.18405065 0.048156336 99.670694 36.891325 6536.8626 1.2746746e+10 0.18310556 0.048562261 99.736800 36.779773 6538.9681 1.1754413e+10 0.18180413 0.049628081 99.803827 36.664190 6541.0736 1.0788520e+10 0.18018358 0.051302667 99.874646 36.531997 6543.1791 9.8588795e+09 0.17819059 0.051428896 99.944782 36.401078 6545.2846 9.0282393e+09 0.17604806 0.052458117 100.00674 36.285411 6547.3901 8.3520248e+09 0.17345354 0.053435713 100.06871 36.169745 6549.4956 7.7372171e+09 0.17041306 0.054471345 100.13648 36.043229 6551.6011 7.1250209e+09 0.16729493 0.055446752 100.20730 35.911035 6553.7066 6.5534357e+09 0.16344324 0.054979857 100.27113 35.789961 6555.8121 6.0835671e+09 0.15897232 0.054170981 100.32896 35.678426 6557.9176 5.6906476e+09 0.15486014 0.053290930 100.38832 35.564462 6560.0231 5.2866186e+09 0.15076642 0.052253441 100.45914 35.432268 6562.1287 4.8640955e+09 0.14696258 0.050757486 100.52992 35.300148 6564.2342 4.4780498e+09 0.14368053 0.048665476 100.59193 35.184397 6566.3397 4.1590812e+09 0.14111419 0.046990736 100.65389 35.068730 6568.4452 3.9149098e+09 0.13888726 0.045362442 100.71347 34.955454 6570.5507 3.7012840e+09 0.13685074 0.044689398 100.77130 34.843917 6572.6562 3.4805007e+09 0.13463291 0.043854374 100.83044 34.729118 6574.7617 3.2533461e+09 0.13210475 0.042489165 100.89654 34.596925 6576.8672 3.0146225e+09 0.12949764 0.040373225 100.96230 34.465555 6578.9727 2.8021562e+09 0.12630812 0.037113593 101.02014 34.354019 6581.0782 2.6308530e+09 0.12359555 0.035572924 101.07797 34.242482 6583.1837 2.4715416e+09 0.12132546 0.034928674 101.14092 34.118156 6585.2892 2.3052737e+09 0.11886938 0.033739540 101.20702 33.985961 6587.3947 2.1368423e+09 0.11660570 0.033245828 101.26897 33.862047 6589.5002 1.9798230e+09 0.11416754 0.032053536 101.32681 33.746380 6591.6058 1.8601943e+09 0.11109688 0.028518389 101.38464 33.631045 6593.7113 1.7605683e+09 0.10810897 0.026440965 101.44247 33.519509 6595.8168 1.6673652e+09 0.10465401 0.025708272 101.50031 33.407973 6597.9223 1.5664857e+09 0.10199004 0.025431693 101.56048 33.282812 6600.0278 1.4503290e+09 0.10058173 0.025046989 101.62186 33.150619 6602.1333 1.3426584e+09 0.099306163 0.027402890 101.68131 33.029610 6604.2388 1.2474742e+09 0.097357879 0.026213066 101.73915 32.918074 6606.3443 1.1755609e+09 0.096402514 0.026885262 101.79648 32.806039 6608.4498 1.1146239e+09 0.093780964 0.023720479 101.85018 32.690373 6610.5553 1.0576876e+09 0.091035692 0.024533572 101.90389 32.574706 6612.6608 9.9976613e+08 0.089780615 0.023827009 101.96296 32.450775 6614.7663 9.3646123e+08 0.089008217 0.023412520 102.02434 32.323303 6616.8718 8.7579373e+08 0.087951247 0.023419134 102.08125 32.202689 6618.9773 8.2499523e+08 0.087528131 0.024508808 102.13496 32.087005 6621.0829 7.8368505e+08 0.086963725 0.025061984 102.18867 31.971990 6623.1884 7.4712467e+08 0.085647693 0.024561611 102.24237 31.860453 6625.2939 7.1355328e+08 0.084470843 0.025748277 102.29607 31.748917 6627.3994 6.7379098e+08 0.082734652 0.025471083 102.35546 31.625577 6629.5049 6.3696330e+08 0.081766347 0.026017821 102.41684 31.498105 6631.6104 6.0084981e+08 0.080232795 0.025992769 102.47344 31.377983 6633.7159 5.6801880e+08 0.078977440 0.026277241 102.52714 31.262316 6635.8214 5.4205495e+08 0.077586853 0.026522970 102.58144 31.144265 6637.9269 5.1344693e+08 0.076645198 0.025707439 102.63809 31.016793 6640.0324 4.8409406e+08 0.076590615 0.025266686 102.69450 30.890655 6642.1379 4.5405186e+08 0.076734669 0.025157340 102.74820 30.779118 6644.2434 4.2859682e+08 0.075769238 0.025369916 102.80190 30.667581 6646.3489 4.0887896e+08 0.074754990 0.026100770 102.85287 30.553306 6648.4544 3.9340573e+08 0.073630251 0.027268493 102.90244 30.437640 6650.5600 3.7948518e+08 0.073047080 0.026383426 102.95487 30.319113 6652.6655 3.5675952e+08 0.072777864 0.027433616 103.01625 30.191640 6654.7710 3.3484538e+08 0.072020848 0.027707786 103.07616 30.066147 6656.8765 3.1284225e+08 0.070522639 0.028792695 103.12573 29.954611 6658.9820 2.9518713e+08 0.069305069 0.031802645 103.17530 29.843075 6661.0875 2.7871812e+08 0.068349178 0.032579510 103.22487 29.728632 6663.1930 2.6302865e+08 0.067451160 0.032429728 103.27444 29.612965 6665.2985 2.5013514e+08 0.067207616 0.028058020 103.32602 29.493960 6667.4040 2.3840842e+08 0.066877718 0.027251858 103.38267 29.366488 6669.5095 2.2735424e+08 0.066113462 0.027832391 103.43816 29.241639 6671.6150 2.1355336e+08 0.066203662 0.026874113 103.48773 29.130103 6673.7205 2.0054381e+08 0.065690966 0.028536828 103.53731 29.018566 6675.8260 1.8460678e+08 0.063775731 0.031380528 103.59215 28.895175 6677.9315 1.7093376e+08 0.062783514 0.031033926 103.64880 28.767703 6680.0371 1.6143523e+08 0.063016775 0.029449418 103.70102 28.650203 6682.1426 1.5376422e+08 0.063754127 0.030533466 103.75059 28.538668 6684.2481 1.4766619e+08 0.063918474 0.032666680 103.80065 28.423865 6686.3536 1.3920794e+08 0.063079033 0.033966801 103.85258 28.296391 6688.4591 1.2750289e+08 0.060568413 0.033891163 103.90431 28.170303 6690.5646 1.2159681e+08 0.059189972 0.033051161 103.95388 28.058767 6692.6701 1.1533888e+08 0.058353537 0.031987184 104.00345 27.947231 6694.7756 1.0955708e+08 0.057742890 0.030173975 104.05774 27.821933 6696.8811 1.0524849e+08 0.057370754 0.030041870 104.11440 27.689739 6698.9866 1.0063211e+08 0.056248573 0.031572066 104.16491 27.568859 6701.0921 1.0007138e+08 0.054670107 0.031544622 104.21036 27.457306 6703.1976 95461977. 0.054698101 0.034169778 104.25663 27.343724 6705.3031 94094730. 0.055046048 0.037207530 104.30856 27.216273 6707.4086 90177254. 0.054915727 0.040128288 104.36045 27.089002 6709.5142 86818461. 0.054319056 0.040805515 104.41004 26.977416 6711.6197 86187206. 0.052637584 0.041397239 104.45962 26.865862 6713.7252 81033203. 0.050762054 0.046309408 104.51058 26.744934 6715.8307 80825985. 0.049240493 0.048228181 104.56251 26.617462 6717.9362 75689795. 0.047359265 0.049816361 104.61139 26.497492 6720.0417 70396842. 0.046299493 0.050414936 104.65683 26.385956 6722.1472 65479859. 0.046265695 0.050423228 104.70259 26.273860 6724.2527 57434087. 0.043519554 0.047816403 104.75453 26.151109 6726.3582 54232155. 0.039937947 0.040954598 104.80646 26.028357 6728.4637 52249273. 0.038774758 0.040285344 104.85234 25.916058 6730.5692 49259978. 0.035086135 0.041159383 104.89779 25.804522 6732.6747 48023212. 0.021649614 0.043864425 104.94655 25.684839 6734.7802 46810698. 0.030829660 0.049306655 104.99848 25.557365 6736.8857 48251073. 0.053877532 0.053703633 105.04856 25.429892