39, 1001 Brune, William; Thames, Alexander; Miller, David; Brosius, Alexandra Penn State University ATHOS - Airborne Tropospheric Hydrogen Oxides Sensor ATom 1, 1 2017, 02, 05, 2018, 11, 28 0 Start_UTC, seconds, seconds since UTC midnight on day of takeoff 3 1, 1, 1 -9999.000, -9999.000, -9999.000 Stop_UTC, seconds, seconds since UTC midnight on day of takeoff Mid_UTC, seconds, seconds since UTC midnight on day of takeoff OHInterference_ATHOS, pptv, OH interference in pptv 0 22 PI_CONTACT_INFO: Address: 503 Walker Building, University Park, PA 16802; email: whb2@psu.edu 814-865-3286 PLATFORM: NASA - DC-8 Aircraft - sampling underneath aircraft forward cargo bay LOCATION: ATom II: Science Flight #5 -- NAN - CHC ASSOCIATED_DATA: N/A INSTRUMENT_INFO: OH from Laser Induced Fluorescence; OH interference from chemical removal. DATA_INFO: Units are pptv for OH interference. UNCERTAINTY: HOx absolute accuracy ~+/- 32% (actually a multiplicative factor of 1/1.32 to 1.32), 2 sigma confidence. ULOD_FLAG: -7777 ULOD_VALUE: N/A LLOD_FLAG: -8888 LLOD_VALUE: N/A DM_CONTACT_INFO: William H. Brune, Penn State, whb2@psu.edu; 814-865-3286 PROJECT_INFO: NSF/NASA ATom Mission. 2016 - 2018; Multiple Locations STIPULATIONS_ON_USE: No restrictions. Contact PI or DM with any questions. OTHER_COMMENTS: Final Data. OH interference signals from individual 20 or 30 second periods have been averaged together for 150 seconds. - This averaging compensates for the noise introduced because OH and OH interference measurements are done sequentially, - and the OH interference signal is the residual of the chemical removal of ambient OH. - Small variations in ambient OH measurements yield large (~1*10^6 cm^-3) variations in individual 20 or 30 second measurements. REVISION: R1 R1: Final Data (see OTHER_COMMENTS) R0: Final Data (see OTHER_COMMENTS) Start_UTC, Stop_UTC, Mid_UTC, OHInterference_ATHOS 73888, 74037, 73963, -9999.000 74038, 74187, 74113, -0.004 74469, 74618, 74544, 0.017 74929, 75078, 75004, -0.007 75079, 75228, 75154, -0.008 75229, 75378, 75304, -0.002 75380, 75529, 75455, -0.012 75530, 75679, 75605, 0.004 75680, 75829, 75755, -0.010 75830, 75979, 75905, -0.003 75981, 76130, 76056, 0.002 76131, 76280, 76206, -0.005 76281, 76430, 76356, 0.016 76431, 76580, 76506, -0.005 76582, 76731, 76657, -9999.000 76872, 77021, 76947, -9999.000 77180, 77329, 77255, 0.015 77330, 77479, 77405, 0.032 77481, 77630, 77556, 0.007 77631, 77780, 77706, -9999.000 77781, 77930, 77856, -9999.000 77931, 78080, 78006, -9999.000 78237, 78386, 78312, 0.011 78387, 78536, 78462, -0.028 78538, 78687, 78613, 0.007 78688, 78837, 78763, -0.004 78978, 79127, 79053, 0.015 79129, 79278, 79204, 0.007 79279, 79428, 79354, -0.001 79429, 79578, 79504, -0.024 79579, 79728, 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