April 24, 1996

Mission Objective

T-39 Flight 07

• To conduct near field sampling of the DC-8 with and without contrail formation.

Flight Log

TAKEOFF/LANDING:
The T-39 departed SLN at 1633UTC and returned at 1900UTC

FLIGHT REPORT:
The T-39 accomplished a rendezvous with the DC-8 approximately 5 min. after takeoff. The aircraft then performed near-field sampling of the lead aircraft's exhaust plume over the ensuing 2 hrs of flight time. Observations were obtained at 24, 30, 35 and 37 kft during constant altitude runs over the CART site.

METEOROLOGY-REPORT:

INSTRUMENT STATUS:

• CIMS - mass spec - WORKED
• MS - Met/Nav system - WORKED
• AMS - Air Motion Sensor - WORKED
• NDIR - CO2 - WORKED
• 3760 - fine CN - WORKED
• 3025 - ultra fine CN - WORKED
• FSSP - 0.3-20um aerosols - NO DATA
• PCASP - 0.1-3um aerosols - NO DATA

Highlights

• Recorded over 100 DC-8 plume crossings at air temperatures ranging from 0 to -45C.
• Observed a reduction in volatile particle concentration within contrail producing wake/plumes.
• Enjoyed 90 degree roll in DC-8 wake.

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