posted Wed Sep 16 08:21:04 1998 PDT
| Date of Mission: | 23 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: | 98-109 |
| Pilot: | Jan Nystrom |
| Take Off: | 1730 UTC (98/08/23) |
| Landing: | 0014 UTC (98/08/24) |
| Duration: | 6.73 hrs |
| DC8 Tail Number: | NASA 817 |
| Sortie: | 980409 |
| Pilot: | Gordon Fullerton Dick Ewers |
| Mission Manager: | Chris Miller |
| Navigator: | Russ Padula Trout |
| Take Off: | 1735 UTC (98/08/23) |
| Landing: | 0014 UTC (98/08/24) |
| Duration: | 6.65 hrs |
- 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.
- Perform three passes just offshore of the Andros Island site, followed by a final pass from E-W directly over the site.
Mission flown as planned. Storm had moved more slowly than anticipated, so after briefing had to adjust all coordinates about 6 minutes north and 48 minutes east. The storm structure was complex and interesting. The wind eye at our altitude was displaced some 20 miles to the NW of where the P3s were reporting it, and where a crescent-shaped echo on the east side of the eye suggested a tight center might be located. The wind speed was stronger on the west side, but convection and turbulence (never more than light) was stronger on the east side. On a few crossings on the E side, there was strong diffluence out of the convective bands, as much as 70-90 degrees.
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