191 1001 Jacob, D. J. , G. M. Gardner, L. Jaegle Harvard University, Cambridge comments file SONEX 1 1 1997 10 07 1998 08 18 0 Midpoint of sampling interval in elapsed UTseconds of flight date 1 1.00 999999. LAT-DADS ; (deg ) 0 176 ============================================================================== comments from file dp971007.da1 ============================================================================== Flight number 97-10-07 Pr Air E-W N-S Radar UT Alt Lat Long Speed Vel Vel Hdg Ptch Roll Alt ============================================================================== comments from file az971007.da1 ============================================================================== ============================================================================== comments from file dm971007.da1 ============================================================================== These data are from operational aircraft instruments which are not maintained at the level required for exacting calculations. We suggest you obtain the meteorological data from other PI-maintained instruments, when they are available. ** Note: The Data Validity Flag for the 3-stage hygrometer data 0 = data is valid 3 = invalid data 4 = max.cooling (operator-commanded) 8 = max.heating (operator-commanded) ** Note: The Data Validity Flag for the 2-stage hygrometer data 0 = data is valid 1 = max.cooling (internal) 2 = max heating (internal) 4 = max.cooling (operator-commanded) 5 = max.cooling (commanded and internal) 6 = max.cooling (commanded) and max.heating (internal) Flight number 97-10-07 Air Pot E-W N-S Tsfc D/F-P3 D/F-P2 Solar UT Pr Temp Temp Wind Wind (IR) Temp F Temp F Zenith ============================================================================== comments from file fp971007.da1 ============================================================================== Data are preliminary. Configuration: LTN-72RH INS 1Hz data are desampled from 5Hz data. 5Hz data file is available upon request, containing: GMTS,Psta,Tsta,TAS, U,V,W,TURB,LAT,LONG,PALT,POT,ROLL,HDG,PIT,Ydot,Xdot,Zdot,Q,YAW,AOA,MACH,Zdo YAWdp,AOAdp (approx. 3 Mbyte per flight hour) C:\CV97\D_971007.CV UT P_ALT LAT LONG TAS ============================================================================== comments from file jv971007.da1 ============================================================================== The quantities reported in this file are the photolysis frequencies (or pho- tolysis rate coefficients or J-values) of 11 photolysis reactions. The method used for these measurements was scanning actinic flux spectroradiometry. Calibration was based on NIST traceable QTH lamps. A preliminary estimate of the instrumental uncertainty of the spectroradiometer technique is 12%. Mo- lecular data used in the calculations was as follows: NO2 sigma: [JPL-94]-temp. below 232 K treated like 232 K phi: [JPL-94] O3 sigma: [Molina and Molina 1986]: linear regression between 226 K and 263 K resp. between 263 K and 298 K temp. below 230 K treated like 230 K phi: [Talukdar et al. 1998]: between 320 K and 203 K: 0.06+A*exp(-B/T) temp. above 320 K treated like 320 K temp. below 203 K treated like 203 K HONO sigma: [JPL-94] phi: unity HNO3 sigma: [Burkholder et al. 1993] phi: unity H2O2 sigma: [JPL-94] phi: unity CH2O sigma: [Cantrell et al. 1990] parametr. of temp. dep. temp.: below 223 K treated like 223 K phi: Evaluation by Sasha Madronich [priv. comm.] using data from: [Moortgat et al. 1983] and [Horowitz and Calvert 1978] CH3OOH sigma: [JPL-94] phi: unity CH3ONO2 sigma: [Talukdar et al. 1997] phi: unity CH3CH2ONO2 sigma: [Talukdar et al. 1997] phi: unity CH3COCH3 sigma: [Gierczak et al. 1998] phi: [Gierczak et al. 1998] PAN sigma: [Talukdar et al. 1995] phi: unity Temperatures used for temperature dependent cross section and quantum yield data are "Static Air Temperature" from the DADS data files. Pressures used for pressure dependent cross section and quantum yield data are also from the DADS data files. The given lower limits of detection are the 2-sigma values of the dark current. All data points taken are included, i.e. no outlier screening or smoothing has been applied to these data. Use of this data requires permission from the PIs. ============================================================================== comments from file mp971007.da1 ============================================================================== This data is based on a FINAL CALIBRATION. RMS performance given below is based 14 RAOB intercomparisons from the 2 cross-country SONEX flights. No timing corrections are needed (per Eiler's e-mail of 12/19/97). All altitudes are pressure altitudes. PALT = A/C 's pressure altitude. Here's a brief free-form tutorial on how to decipher the MTP data: Data groups consist of the following group of lines per 16-second observing cycle. First line is: UTSEC, # alt's in following table, Pressure Altitude, Pitch, Roll, Outside air temp (K), tropopause altitude #1 (km), tropopause altitude #2 (km) [if present], potential temperatures of tropopause #1 and #2 (4-cycle average), latitude, longitude, & lapse rate near flight level. The 1-liners (for each cycle) can be stripped & imported into a spreadsheet for convenient plotting of trop altitude, lapse rate, etc. The tropopause altitudes are calculated by cubic spline interpolation of the retrieved altitudes using the WMO definition (that is, trop #1 is lowest altitude where average lapse rate > -2 K/km from initial -2 K/km point to any point within 2 km; trop #2 occurs above first trop after lapse rate is < -3K/km for >1 km, and then first trop definition applies, possibly from within the 1 km region.) NB. Times are corrected per Timing Memo of 981219. Remaining set of lines for each cycle consist of 5 columns: col#1 is pressure altitude (units of 10 m), & col#2 is temperature from MTP (units of 0.1 K), col#3 is geometric altitude (units of 10 meters), based on DADS GPS (units of 10 m), col#5 is molecular air density [1E+21/m3]. ============================================================================== comments from file nu971007.da1 ============================================================================== Flight # 1 *Time correction (flights 4-8): UT times have been corrected per SONEX Timing Memo of 12/19/97. *General comments: Although the 1 Hz data for NO and NOy are reported here, variations within short time periods are mostly due to fluctuations in the measurements. The 1 Hz data should be useful for investigating the rapid changes of NO and NOy, such as spikes due to aircraft emissions. However, averaging for a time period of more than 10 seconds for other analyses is generally recommended. *Address: Yutaka Kondo Solar-Terrestrial Environment Laboratory, Nagoya University 3-13, Honohara, Toyokawa, Aichi, 442-8507, Japan phone:+81-533-89-5156, fax:+81-533-89-5161 e-mail:kondo@stelab.nagoya-u.ac.jp UT_Sec NO NOy ============================================================================== comments from file pn971007.da1 ============================================================================== final data mixing ratio below limit of detection indicated as 8888 time listed is midpoint of sampling period; sampling period is 120 seconds for PAN and PPN, overall accuracy is the greater of +/-1pptv or +/-20% for C2Cl4, overall accuracy is the greater of +/-0.5pptv or +/-10% for Methyl Nitrate and Ethyl/i-Propyl Nitrate, overall accuracy is the greater o the "S_" before the species name is to designate Singh GMT S_PAN S_PPN S_C2Cl4 S_Methyl_Nitrate S_Ethyl/i-Propyl_Nitrate ============================================================================== comments from file ak971007.da1 ============================================================================== final data time listed is midpoint of sampling period; sampling period is 150 seconds for Acetone and Methanol, overall accuracy is the greater of +/-10pptv or +/-25% the "S_" before the species name is to designate Singh GMT S_Acetone S_Methanol ============================================================================== comments from file model/mj971007.da1 ============================================================================== The photochemical model is constrained to reproduce the observed jvalues (JNO2 and J(O3->O(1D)), by scaling the UV flux. TOMS ozone column is used along the flight track. ============================================================================== comments from file model/mc971007.da1 ============================================================================== The photochemical model is for clear-sky conditions (no clouds and zero gound albedo). TOMS ozone column is used along the flight track. ============================================================================== comments from file mm971007.da1 ============================================================================== Data are preliminary, winds will be available soon. Configuration: LTN-72RH INS 1Hz data are desampled from 5Hz data. 5Hz data file is available upon request, containing: GMTS,Psta,Tsta,TAS, U,V,W,TURB,LAT,LONG,PALT,POT,ROLL,HDG,PIT,Ydot,Xdot,Zdot,Q,YAW,AOA,MACH,Zdo YAWdp,AOAdp (approx. 3 Mbyte per flight hour) C:\CV97\D_971007.CV GMT Psta Tsta Thta U V W TEDR 0 999999