# # 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 = 44.562491 km # Date (UTC) = 2017-01-04T10:00:19.524 # Date (julian) = 2457757.91689264 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6516.1901 4.5509763e+10 0.13508455 0.037165292 106.54821 31.943346 6518.6292 4.0467544e+10 0.14715066 0.037900799 106.61512 31.814421 6521.0683 3.5575062e+10 0.15926157 0.038636306 106.68211 31.685212 6523.5074 3.1294895e+10 0.16718449 0.039304878 106.74254 31.568672 6525.9465 2.7784975e+10 0.17139487 0.039674188 106.80209 31.453822 6528.3857 2.5009544e+10 0.17601903 0.041748420 106.86165 31.336712 6530.8248 2.2593197e+10 0.17842848 0.044983345 106.92120 31.217609 6533.2639 2.0460640e+10 0.18086544 0.047631724 106.98209 31.096682 6535.7030 1.8434784e+10 0.18009648 0.047919347 107.04909 30.967474 6538.1421 1.6560743e+10 0.18026367 0.049225870 107.11541 30.839568 6540.5812 1.4928073e+10 0.17920879 0.051128675 107.17497 30.724703 6543.0203 1.3531928e+10 0.17705935 0.051387223 107.23453 30.609837 6545.4594 1.2272651e+10 0.17479808 0.052459683 107.29959 30.484354 6547.8985 1.1040007e+10 0.17252786 0.053629058 107.36659 30.355146 6550.3376 9.9476075e+09 0.16992149 0.055069901 107.42598 30.232512 6552.7767 9.0474618e+09 0.16668288 0.055391260 107.48127 30.113409 6555.2159 8.2847574e+09 0.16249805 0.054671994 107.54008 29.991277 6557.6550 7.5530993e+09 0.15738381 0.053455573 107.60708 29.862069 6560.0941 6.8550643e+09 0.15205344 0.052189488 107.67162 29.735877 6562.5332 6.2635449e+09 0.14681569 0.050372558 107.72692 29.621027 6564.9723 5.7621711e+09 0.14291224 0.048330953 107.78221 29.506176 6567.4114 5.3092340e+09 0.14004191 0.046269334 107.84346 29.378974 6569.8505 4.8587431e+09 0.13789717 0.044907780 107.90568 29.249746 6572.2896 4.4478808e+09 0.13564282 0.044064295 107.96584 29.131587 6574.7287 4.1091838e+09 0.13293933 0.042504996 108.02539 29.016738 6577.1678 3.8096168e+09 0.13007095 0.039956731 108.08606 28.895874 6579.6070 3.5212257e+09 0.12690789 0.036736829 108.14827 28.766665 6582.0461 3.2395244e+09 0.12428036 0.035281260 108.20821 28.642184 6584.4852 2.9987156e+09 0.12165414 0.034251219 108.26351 28.527334 6586.9243 2.7985385e+09 0.11909201 0.033159348 108.31880 28.412485 6589.3634 2.5993615e+09 0.11649251 0.032325041 108.37618 28.283587 6591.8025 2.4014543e+09 0.11339794 0.028296381 108.43361 28.154378 6594.2416 2.2124034e+09 0.11035293 0.026039891 108.48915 28.037917 6596.6807 2.0605722e+09 0.10686560 0.025724179 108.54446 27.923053 6599.1198 1.9249576e+09 0.10417102 0.024936937 108.60348 27.800469 6601.5589 1.7835970e+09 0.10344474 0.027308919 108.66569 27.671261 6603.9980 1.6522814e+09 0.10121905 0.026072431 108.72289 27.548492 6606.4372 1.5346072e+09 0.099971626 0.026718402 108.77394 27.433642 6608.8763 1.4351755e+09 0.096121538 0.023709203 108.82607 27.317391 6611.3154 1.3372982e+09 0.092269673 0.024757337 108.88828 27.188182 6613.7545 1.2379197e+09 0.090618949 0.023850414 108.95038 27.059119 6616.1936 1.1531242e+09 0.088760567 0.023312684 109.00145 26.944239 6618.6327 1.0793387e+09 0.088192954 0.024248565 109.05249 26.829389 6621.0718 1.0172543e+09 0.087714940 0.025065642 109.10773 26.708250 6623.5109 9.5205922e+08 0.086425181 0.024681116 109.16516 26.583827 6625.9500 8.9584735e+08 0.085480034 0.026531283 109.22138 26.464827 6628.3891 8.4680605e+08 0.083998772 0.025861092 109.27669 26.349962 6630.8283 7.9802222e+08 0.082581486 0.025930343 109.33245 26.231987 6633.2674 7.5082762e+08 0.081401385 0.026198932 109.38988 26.102779 6635.7065 6.9738512e+08 0.080078245 0.026505734 109.44649 25.975396 6638.1456 6.5346411e+08 0.079143345 0.025665300 109.49754 25.860546 6640.5847 6.1832157e+08 0.079400660 0.025199114 109.54858 25.745695 6643.0238 5.8451997e+08 0.079229195 0.025196213 109.60458 25.619700 6645.4629 5.4343617e+08 0.078216882 0.025668542 109.66200 25.490492 6647.9020 4.9533105e+08 0.077310832 0.026912700 109.71614 25.364570 6650.3411 4.4872252e+08 0.076731710 0.026333332 109.76878 25.240148 6652.7802 4.0725322e+08 0.076464622 0.027465197 109.82048 25.121430 6655.2194 3.7866868e+08 0.075163637 0.027700853 109.87153 25.006565 6657.6585 3.6216066e+08 0.073128564 0.029664907 109.92415 24.889345 6660.0976 3.4906190e+08 0.071380929 0.031714686 109.98157 24.764923 6662.5367 3.3976158e+08 0.069565441 0.032743161 110.03825 24.639750 6664.9758 3.1925633e+08 0.068634299 0.028635709 110.09089 24.510541 6667.4149 2.9723399e+08 0.067989900 0.027255858 110.14342 24.382295 6669.8540 2.7743576e+08 0.067124738 0.027478574 110.19447 24.267446 6672.2931 2.6339189e+08 0.066850419 0.027049497 110.24551 24.152597 6674.7322 2.5579267e+08 0.065549481 0.029572475 110.29770 24.030891 6677.1713 2.4410189e+08 0.063260797 0.032114641 110.35034 23.906469 6679.6104 2.3147320e+08 0.063084055 0.029763323 110.40598 23.779048 6682.0496 2.1555567e+08 0.063993552 0.030462408 110.46340 23.649840 6684.4887 2.0352815e+08 0.064048523 0.032678890 110.51512 23.530623 6686.9278 1.9433153e+08 0.062372485 0.034300880 110.56191 23.420027 6689.3669 1.8423179e+08 0.059337651 0.033685766 110.60979 23.305965 6691.8060 1.7313596e+08 0.058035636 0.032811101 110.66244 23.176737 6694.2451 1.6389903e+08 0.056813784 0.030917496 110.71509 23.047974 6696.6842 1.5985729e+08 0.056285374 0.029960064 110.76773 22.923551 6699.1233 1.5583497e+08 0.054683507 0.031476637 110.82037 22.799129 6701.5624 1.5386596e+08 0.052566388 0.032234700 110.87301 22.674707 6704.0015 1.4487014e+08 0.052351760 0.036178312 110.92565 22.550285 6706.4407 1.3221028e+08 0.051841208 0.039213331 110.97829 22.421473 6708.8798 1.2002478e+08 0.050744723 0.041001612 111.03093 22.292264 6711.3189 1.0763128e+08 0.048184757 0.041055025 111.07873 22.178461 6713.7580 1.0192770e+08 0.045492287 0.046428092 111.12552 22.067864 6716.1971 98313545. 0.043330673 0.048691662 111.17510 21.950675 6718.6362 95906399. 0.040751277 0.050803254 111.22774 21.826252 6721.0753 91898721. 0.040671641 0.050326591 111.28038 21.699977 6723.5144 89053948. 0.039186073 0.049655847 111.33302 21.570769 6725.9535 84217801. 0.034823516 0.040980393 111.38567 21.442979 6728.3926 80836533. 0.034086517 0.040184603 111.43831 21.318537 6730.8318 79445427. 0.032588420 0.041519337 111.48996 21.194100 6733.2709 71807552. 0.030682609 0.045394896 111.53782 21.069676 6735.7100 67995952. 0.031370478 0.050047120 111.58624 20.945253 6738.1491 65013395. 0.032579924 0.058141852 111.63888 20.820831 6740.5882 65349827. 0.031977119 0.065055185 111.69152 20.696271 6743.0273 68339007. 0.028446374 0.071231611 111.74416 20.567063 6745.4664 61168122. 0.023202627 0.078762962 111.79680 20.437855 6747.9055 53130529. 0.015190978 0.067049425 111.84495 20.313141 6750.3446 45306239. 0.0054509593 0.072592601 111.89280 20.188719 6752.7837 42973198. -0.0087521871 0.073227543 111.94647 20.049193 6755.2228 46858563. -0.062750502 0.074507640 112.00111 19.907368 6757.6620 47795695. -0.018361773 0.074731188 112.05375 19.782945 6760.1011 46766579. 0.079027375 0.076254004 112.10640 19.658522