May 3, 1996

Mission Summary

T-39 SUCCESS flight #12 (scientist: Bruce Anderson)

Mission Objective

sample the 757 exhaust emissions as it alternately burned low and high sulfur content fuel

Flight Log

TAKEOFF/LANDING
The T-39 left Salina at 17.36 UTC (12.36 noon local time) and returned to Salina at 20.20 UTC

FLIGHT REPORT
The T-39 flew in formation with the B-757 to the CART site and followed it (50-100m) in trail as it executed a racetrack pattern at different altitudes up and downwind of the ARM site over northern OK. Extensive emission data were obtained as the B757 burned both the low and high-S containing fuels.

METEOROLOGY-REPORT
see DC-8 flight report

INSTRUMENT STATUS

• MS-Nav/Met System: no problems
• AMS - Air Motion/Dynamics: no problems
• NDIR - CO2: no problems
• 3760 - Fine CNCs: no problems
• 3025 - Ultrafins CNCs: no problems
• FSSP - Forward Scatt Probe: NOT OPERATIONAL
• PCASP - Passive Cav Probe: no problems
• CIMS - Mass Spectrometer: no problems

Mission Highlights

• observed considerable differences in the B-757 exhaust aerosol characteristics as a function of fuel sulfur
• significantly more ultrafine particles and H2SO4 were emitted by the B757 engines when they were burning the high-S fuel as opposed to the Low-S fuel
• recorded more interesting contrail video