Mission Summary
20090827I1 Aircraft 43RF
TDR monitoring flight into Tropical Storm Danny 2009

Aircraft Crew (43RF)
Aircraft CommanderBarry Choy
Co-pilotsCarl Newman
Al Girimonte
Flight EngineersDewey Floyd
Paul Darby
NavigatorsChris Sloan
Ryan Kidder
Flight DirectorIan Sears
Barry Damiano
Data TechnicianBobby Peek
Dropsonde OperatorJeff Smith
Electrical EngineerBill Olney
Scientific Crew (43RF)
Lead Project ScientistPaul Leighton
Dropsonde ScientistJun Zhang
iWRAP ScientistJoe Sapp (UMASS)

20090827I1 proposed track

Mission Plan :

Perform TDR/lifecycle monitoring into T. S. Danny (See proposed track above), butterfly pattern at 12000 ft. with IP approx. 120 nm west of low level circulation. Fly standard 105 nm legs (See Turns table below) with possibly extended legs to the north and northeast to oversample convection in this area and possibly shorten legs to the south where dry tongue and shear are inhibiting convection. Roughly same as previous flight with dropsondes at endpoints and midpoints of legs and a center drop, also 7 BT's on way to storm 6 at endpoints and 7 returning from storm.

Planned turns
Prepared by the Hurricane Research Division
Aircraft: N43RF
Altitude: FL120
Proposed takeoff: 27/08:00 Z
(deg) (min)
(deg) (min)
0MACDILL 0. 0. 0:00
1S26 3072 03105/270 565.565. 2:04
2S26 3068 09105/090 210.775. 2:55
3S28 0169 08105/030 105.881. 3:21
4S24 5971 04105/210 210. 1090. 4:12
5S24 5969 08105/150 106. 1196. 4:38
6S28 4071 29150/330 255. 1451. 5:40
7 MACDILL 586. 2037. 7:39

Mission Summary :

Take off Landing
MacDill AFB, FL07:54 UTC MacDill AFB, FL15:10 UTC

Takeoff was at 075450 UTC. A modified version of the butterfly pattern was flown to try to account for the asymmetric precipitation and changing structure of Danny (See actual track). Satellite imagery showed the LLCC displaced to the SW of the convection. We overflew the estimated LLCC on the inbound leg searched briefly for the mid or flight-level circulation, returning to the LLCC before continuing west to continue the pattern. Legs were extended on the east and northeast side of the pattern both to avoid turning in heavy convection and to sample the more convective cells to the NE of the centers with the doppler radar. On the inbound NE/SW leg we jogged right (West) from the estimated mid-level to the estimated LLCC. There were limited scatterers in the pattern on the southwest and southeast quadrants from a dry tongue extending into the center so the westbound downwind leg was shortened. We dropped sondes at the endpoints and midpoints with a total of 14 with 2 not being sent. Also, the first four were sent with an incorrect date, these were not re-transmitted per the flight director's request. We dropped 19 AXBTs at 1° longitude spacings on the ferries to and from the storm avoiding land masses. Sea-surface temperatures were about 28°C. The aircraft returned to Tampa at 151000 UTC.

20090827I1 actual track

Mission Evaluation:

Three doppler wind analysis legs were completed and sent in real-time. They show an asymmetric storm pattern with limited reflectors to the south of centers(LLCC west/SW of MLCC).

Paul Leighton

Mission Data :

Error log | g'zipped Fast data | NetCDF| 1 second

LPS log | Radar log | Sonde log | AXBT log | Miscellaneous

Flight track

Temperature and Moisture

Wind and Atlitude

Pressure height maps of dropsonde data
700mb map
850mb map
925mb map
1000mb map
surface map

Page last updated Oct. 19, 2009
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