PARTICLE SIZE DISTRIBUTION AT 110,000 FT
143
Table 3—- MEDIAN PARTICLE SIZE
Flight No.
Estimated
particle
diameter, yp
2556, 2562, 2569, and 2572
2611
T-781-A
T-796-A
0.002
0.008
0.13
0.008
HASL is continuing its efforts in stratospheric particle studies to
verify the findings reported here and to obtain information about particle size distributions at other balloon-sampling altitudes. A compact,
lightweight electrostatic precipitator is now being developed for the
specific purpose of collecting samples for making the appropriate
measurements. The design of this sampler will eliminate the causes
of uncertainties in the quality of samples, particularly with respect to
sample contamination by nonstratospheric particles.
REFERENCES
1. C. E. Junge and J. E. Manson, Stratospheric Aerosol Studies, J. Geophys.
Research, 607): 2163-2182 (1961).
2. J. P. Friend (Ed.), The High Altitude Sampling Program, Report DASA~-1300,
Vol. 5, Supplementary HASP Studies, Isotopes, Inc., Aug. 31, 1961.
3. M. Lippmann (Comp.), Stratospheric Monitoring Program, Summary Progress Report, February 1961—April 1962, USAEC Report NYO-9675, Del
Electronics Corporation, Sept. 10, 1962.