dc-8 seac4rs payload & capabilities hanwant singh, arc
DESCRIPTION
DC-8 SEAC4RS Payload & Capabilities Hanwant Singh, ARC. Multiple flight clearances needed. NP. TB. IN. BD. MM. IN. TL. DC-8 4 Engine Jet Ceiling 12.5 km (0.5-41Kft) Range 10000 km True air speed 250-450 knts Turning radius 15-30 km (TRANSCRIPT
DC-8 SEAC4RS Payload & CapabilitiesHanwant Singh, ARC
Assumes 8 h DC-8 round trip with some loiter time
UTAPAO
Multiple flight clearances needed
IN MM
TLBB
NP
VNCB
BD
TBIN
ML
IA
DC-84 Engine JetCeiling 12.5 km (0.5-41Kft)Range 10000 kmTrue air speed 250-450 kntsTurning radius 15-30 km (<10° BA)Nominal flights 8-9 hours
DC-8 SEAC4RS Payload (26 instruments)
Investigator Acronym Measurement Type Principal, sensitivity, resolutionRyerson CSD CL NO, NO2, NOy, O3 In Situ chemiluminescence; 10 ppt; 1-sCohen TD-LIF NO2, Sum-Nitrates In Situ Fluorescence; 10 ppt; 1-sHuey GT-CIMS PANs, SO2 In Situ Ionization-spectroscopy; 10 ppt; 10-sDibb SAGA* HNO3, bulk aerosols In Situ Ion-chromatography; 10 ppt; 120-sWennberg CIT-CIMS HNO3, HCN, peroxides, o-acids In Situ Ionization-spectroscopy; 10 ppt, 1-sFried DFGAS Formaldehyde In Situ IR-Spectrometer; 10 ppt; 15-sHanisco ISAF Formaldehyde In Situ Fluorescence; 10 ppt; 1-sWisthaler PTR-MS Select OVOC, NMHC, CH3CN In Situ Ionization-spectroscopy; 10 ppt, 10-sBlake WAS* Hydro and halo carbons In Situ Gas-chromatography; low ppt, 120-sDiskin DACOM CO, CH4, N2O In Situ TDL-spectroscopy, low ppb, 1-sBeyersdorf AVOCET CO2 In Situ Non-dispersive IR, 100 ppb, 1-sDiskin DLH Water vapor Remote Open-path Spectroscopy, 1 ppm, 1-sHair DIAL HSRL O3 and aerosol profiles Remote Up/down lidar ozone and aerosol profilesJimenez AMS TOF-Aerosol mass spectra In Situ Fine aerosol (SO4, NO3, OA), 0.1 ng/m3, 10-sGao HD-SP2 Black carbon aerosol In Situ laser-induced incandescence, 1 ng/m3, 60-sMurphy PALMS Single particle composition In Situ ionization mass spectrometer, 0.2-3 mm, 100-HzAnderson LARGE Aerosol measurements (CN, CCN) In Situ Particle counters, 0.01-10 mm, 1-sSorooshian DASH-SP Aerosol hygroscopicity In Situ Differential mobility, growth factors, 10-2500 nmBrock AOP Aerosol extinction and absorption In Situ Cavity ring down/photoacoustic, 405-660 nmLawson SPEC Aerosol parameters Remote Particle imagingTanelli APR-2 Precipitation, clouds Remote 13.4 & 35.6 GHz RADARRussell AATS-14 Aerosol optical depth Remote Sun photometer, 350-2100 nm; 2-6 nm resolutionBucholtz BBR Broadband solar and IR Remote Up/down solar/IR irradiance, hemispheric, 10-HzSchmidt SSFR Solar and near IR irradiance Remote Up/down radiometer, 380-2200 nm, 10 nm resol.Hall CAFS Actinic flux Remote Spectral radiometers, 280-680 nm, 2 nm resol.Bui MMS Micromet (T, P, wind vectors) In Situ Winds, temperature, pressure, 100-Hz
DC-8 SEAC4RS Payload
Mission Mgr. Console
NavigationCIT-CIMS
AOP
LARGE
HD-SP2DASH-SPPALMS AMS
ISAF TD-LIFGT-CIMS
CSDL-CLDACOMDLH SAGA
AVOCETAPR-2
DFGASMMSSPEC
PTR-MSWAS SSFR
BBRAATS-14(4STAR)
MSCAFS
DIAL
O3/NOy
HCHO
DIAL
Instrument channels & probes• AOP (3 instruments): (1) cavity ring-down extinction spectrometer,
(2) photo acoustic absorption SPTR, and (3) aerosol size SPTR• GT-CIMS (2 instruments): (1) SF5
- CIMS for SO2 (HCl, HNO4) and (2) I- CIMS for PANS
• LARGE: Multiple probes
75 organics on the DC-8
• PTR-MS: CH3CN, acetone, methanol, acetaldehyde, benzene, toluene, isoprene, pinenes, MVK
• CIT-CIMS: HCN, CH3OOH, CH3COOH, HCOOH, some oxygenated carbonyls
• GT-CIMS: PANs {RC(O)OONO2}• WAS: C2-C10 NMHC, C1-C5 RONO2, C1-
C2 halocarbons, OCS• AMS: Organic aerosol
Observed groups on the DC-8
• Tracers: CH3CN, HCN, CO, CO2, SO2, halocarbons (CH3I/CHBr3), NOy, some NMHC, aerosol
• Photochemical/O3 precursors: O3*, NO2, HNO3, HCHO, NO, PANs, HNO4, OVOC,C1-C10 HCs, H2O2, CH3OOH
• Greenhouse gases: CO2, CH4, N2O, O3, H2O• Aerosol composition: SO4, NO3, BC, NH4, OA• Aerosol properties: CN, hot-CN, CCN, hygroscopicity,
absorption, extinction, scattering, clouds/precipitation• Radiation: Actinic fluxes, AOD, solar and IR irradiances
*Duplicate DC-8 measurements in red
Downlinking DC-8 data for flight coordination
Many DC-8 PIs are agreeable to transmitting data to the ground but will need help to facilitate this process. Most have not done it before.
Need to optimize this activity taking into account bandwidth constraints and usefulness for ground planners.
Present feasible candidates are:• DIAL curtains • CO, O3, NOy, H2O• Hot/cold FCN, SO4• State variables (T, P, Lat/Long, Alt, 3-D winds)• Feasible but lower priority (CH4, SO2, PAN, BC,
OA, CO2, NO, total-SCAT, UFCN, AOD etc.)
O3 Aerosol Scat
Examples of gas & aerosol composition from DC-8
Some comments & observations/DC-8Excellent DC-8 range & state of the art gas/aerosol
composition package to address main SEAC4RS goals of;- Megacity/BB pollution outflow and its evolution;- Inflow, outflow & processing by deep convective
systems; - Asian monsoon anticyclone composition and chemistry;- Cirrus layer heating rates & UTLS influences- SAT Cal/Val
Coordinated platform flights will be central to achieving SEAC4RS objectives
SEAC4RS goals will benefit from:- Smooth DC-8 in flight communications with ground and
possibly other A/C- Sorting data transmission and instrument inter-
comparison issues during DC3- Suitcase flight opportunities and/or extra long flights??