The Mirai Indian Ocean Cruise for the Study of the MJO-Convection On-
set (MISMO) field campaign was conducted in the autumn of 2006. 
Soundings were launched from 3 sites (Gan, Male' and the R/V Mirai).
and were corrected as described in Yoneyama (2008a). Details of MISMO
are contained in Yoneyama (2008b).

Hires data and data interpolated to 50 and 250m is available.

Yoneyama, K., M. Fujita, N. Sato, M. Fujiwara, Y. Inai, and
F. Hasebe, 2008a: Correction for radiation dry bias found in
RS92 radiosonde data during the MISMO field experiment.
SOLA, 4, 13–16.

——, and Coauthors, 2008b: MISMO field experiment in the equa-
torial Indian Ocean. Bull. Amer. Meteor. Soc., 89, 1889–1903.