980826 MISSION SCIENTEST POST FLIGHT SUMMARY

Date of Mission:	26 August, 1998
Daily Mission Scientist:	Ed Zipser
Deputy Daily Mission Scientist:	Gerry Heymsfield
DC-8 Scientist:	Ed Zipser
S-POL Scientist:	Gerry Heymsfield
Project Scientist:	Robbie Hood
UND Citation II Scientist:	Jeff Stith
Water Vapor Scientist:	Harvey Melfi
Nowcasters:	Richard Wohlman

ER2 Tail Number:	NASA 806
Sortie:	98-111
Pilot:	Jan Nystrom
Take Off:	1100 UTC (98/08/26)
Landing:	1816 UTC (98/08/26)
Duration:	7.27 hrs

DC8 Tail Number:	NASA 817
Sortie:	980411
Pilot:	Ed Lewis Dick Ewens
Mission Manager:	Chris Miller
Navigator:	Russ Padula/Trout
Take Off:	1103 UTC (98/08/26)
Landing:	1826 UTC (98/08/26)
Duration:	7.38 hrs

Mission Description:

 Obtain data from the ER-2 and DC-8 on clouds and precipitation
over and within Bonnie as possible at/near the times of TRMM overpasses at
1135, 1313, and 1449 UTC.

  As Bonnie approached landfall near Cape Fear NC, execute coordinated 
passes through the storm with the ER-2, DC-8, and NOAA 42, all within a 
radius of 100 nm.

  Obtain LASE and MACAWS data in the clear-air inflow region
southeast of Bonnie.

DC8 Mission Notes:

All objectives were met.  The storm continued to exhibit a huge eye, with 
the eyewall almost closed, circular, and about 100 nm in diameter.  The 
north wall had heavier rainfall rates, but at no time was any turbulence 
more than light encountered at DC-8 level.  Indeed, after the first 
figure-four was completed at 35K' we descended to 30K' for the second 
figure-four.  The wind pattern was more symmetric than on the two previous 
flights, with mainly cyclonic flow at all radii out to >100 nm, and wind 
maxima quite far away from the center, in the 50-60 knnot range.  The 
clear air inflow leg on the SE side was indeed mostly clear above the low 
broken clouds in the lowest 1000-1500 m.  On exit, we modified the return 
leg to come through clear air southwest of the storm before returning to 
Patrick AFB.

UND Tail Number:	UND N77ND
Pilot:	Kent Streibel
Take Off:	2200 UTC (98/08/26)
Landing:	2318 UTC (98/08/26)
Duration:	1.30 hrs

Mission Notes:

We sampled a samll convective rain shower SW of S-Pol, too far for ideal 
radar coverage.  The purpose of the flight was to flight test the new 
High Volume Particle Sampler (HVPS) and to obtain data for comparison wiht
S-Pol, if possible.   


The probe did not respond properly during flight, and the signals from it
degenerated during the flight, so we cut the flight short and returned to b
base to troubleshoot the probe.   The problem was traced to a loose connector
which was affected by vibrations during the flight.  It has been repared with
a better connector and we will try and repeat this mission.

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