ACE-Asia Aircraft Twin Otter DMA size distributions (Wang)

Total Twin Otter scientific flights: 19
flight 5, 7-19: currently available
flight 6: DMA not working
flight 1-4: Different neutralizers were used, need more work on the
data. 

The file names of DMA data are 'DMASD_' plus the flight date (MMDDYY) and 
Twin Otter flight number. 

Example:
DMASD_041401_RF09.dat

The data structure:

1st column: UTC time of DMA measurement
2nd column: Altitude during DMA measurement
3rd column: RH inside the DMA
4-33 columns: Size distributions (dN/dlog10Dp(cm-3)). The particle sizes (Dp) 
of each bin are listed in the 1st row (4-33 column)

Example:

UTC     alt(m)    RH(DMA)%  20.0      22.9      26.2      ...  873.8     1000.0 
1.3319  14.8      15.4      1305.0    2133.7    3095.6    ...   41.0        3.9
.
.
.


Note:
(1)The UTC may be negative at the beginning of the file, which means previous 
day.
(2)"NaN" was used when no data was available.
(3)The really high concentrations at the beginning and the end of the flight 
are due to the contamination of airplane exhaust.

The data of research flight 10, 11, 12, 14 should be reasonably accurate. No 
quality control has been done on other flights at this moment. I will update 
them soon.

Thank you,

Jian Wang
3/8/02
Dept. of Chemical Engineering
Tel: (626)395-3195 (Office)
     (626)395-4410 (Lab)
Fax: (626)796-2591