NOAA G-IV N49RF

Hurricane Ivan Day Mission 5

Surveillance Flight

Flight ID: N040912

Sensor or System	Number or Name

INE (for wind derivation)	VEW VNS

Attack Angle	AKRD2

Slip Angle	SSRD1

Accelerometer	ACINS

Temperature Probe	AT3

Dew Point Probe	DPLC

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.

Although AKRD2 exhibited a very large spike at 0100Z, it is the variable of choice for the ATTACK parameter. AKRD1 began trending away from AKRD2 and the ADCAOA parameter at 2217Z.

Around 2112Z, during a precipitation rich environment, all temperature values, except for AT3 and TT3, and both dewpoint sensors showed spikes in data. The dewpoint spikes were greater than the ambient temperature spikes. This will cause relative humidity values to soar over 100%.

Also, at 2109Z, AT2 spiked during a precipitation event.

At 2155Z, during a precipitation event, DBP1 diverged from DBP2 and DAP1 diverged from DAP2. This is likely due to ice crystals clogging the ports and affecting the flow around the sensor.

Otherwise, all instruments performed optimally during this mission.

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

2004-09-28T09:01:40