980824 MISSION SCIENTEST POST FLIGHT SUMMARY

Date of Mission:	24 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:	98-110
Pilot:	Ken Broda
Take Off:	1934 UTC (98/08/24)
Landing:	0317 UTC (98/08/25)
Duration:	7.72 hrs

DC8 Tail Number:	NASA 817
Sortie:	980410
Pilot:	Dick Ewers Gordon fulletron
Mission Manager:	Chris Miller
Navigator:	Russ Padula Trout
Take Off:	1934 UTC (98/08/24)
Landing:	0317 UTC (98/08/25)
Duration:	7.72 hrs

Mission Description:

 Execute two "figure-four" patterns through the center of
Hurricane Bonnie, coordinated between DC-8 and ER-2, and (more or less)
with two NOAA P-3's as well.  Result is 8 radial legs to about 100 nm
distance from storm, spaced 45 degrees apart.  In addition, in an attempt 
to get data from LASE and MACAWS, the second figure-four has legs extended to 140 nm adius.

 After the last pass through the storm, execute a long leg
under the anvil on the west side of the storm to a position close to 
Andros Island, then  fly a data leg just east of Andros site on the 
return to Patrick.

DC8 Mission Scientist Report:

Mission flown as planned.  All pre-briefed points had to be shifted
to the ENE by about 30 nm due to updated storm center fixes.  The ER-2 
lost their nav computer, so we had to be judicious in passing new way 
points to them, but thanks to the good work of our Navs and the ER-2 
pilot the mission was saved. 


Wind and cloud structure in Bonnie on this day was very interesting.  
While remnants of an inner eye were occasionally visible, including a 
report of a big buildup, the large radius eyewall was more prominent, 
at least at our altitude.  As on the  previous day, strongest winds 
tended to be in the quadrants away from the convection.  There were 
west and northwest winds dominating the western semicircle right into 
the center, while a major divergent source region was on the east side.  
This source region apparently was responsible for the huge cirrus shield 
extending even to 140 nm west of the center, with falling "snow" at our 
altitude in spite of strong west (!) winds.  On entry from the west, at 
about 2306 UTC, the large-scale eye was manifestly visible in a swirling
pattern in the low clouds, but this feature was about 30 nm NW of the eye
position as reported by NOAA and the wind eye at our altitude.

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