NOAA G-IV N49RF

Hurricane Ivan Mission 2

Surveillance Flight

Flight ID: N040909

Sensor or System	Number or Name

INE (for wind derivation)	VEW VNS

Attack Angle	AKRD2

Slip Angle	SSRD2

Accelerometer	ACINS

Temperature Probe	AT3

Dew Point Probe	DPRC

Altitude (for vertical wind derivation)	PALT

Static Pressure	PS2C

Dynamic Pressure	QC2C

True Air Speed	TAS2

Constants File	49cal041

Project Directory	406

Notes:

There were no time/data glitches during this flight.

Total Temperature 2 was inoperative from the beginning of the flight through 1731Z. Data from this sensor was erratic through 1911Z.

Large spikes in the dewpoint values from 1834Z-1839Z are the result of dewpoint balancing. Following the balancing, data from DPL was irractic until 1909Z.

After flying into precipitation, at 2032Z, 2047Z, and 2125Z, spikes occurred in the dewpoint data as the heaters kicked on to melt ice on the mirrors. This will cause unrepresentative relative humidity values over 100%.

DBP1 seperated from DBP2 at 2155Z. This occurred following a precipitation event and increasing altitude. It is likely that one of the ports became clogged with ice. Once the aircraft started descending, the port unclogged and the data recovered.

Otherwise, all instruments performed optimally during this mission.

Flight Director:	Martin Mayeaux (813) 828-3310 x 3086

2004-09-28T09:01:40