Upper-Air Weather Observation comprises the Vaisala  Radiosonde RS92 family, the Vaisala  DigiCORA® Sounding System MW31 and DigiCORA® sounding software.

The models of RS92 operating in the 400 MHz meteorological band include the Vaisala  Radiosonde RS92-SGP with code correlating GPS wind finding, the Vaisala  Radiosonde RS92-KL with Loran-C wind finding, the Vaisala  Radiosonde RS92-K, the PTU-only model (only measures pressure, temperature and relative humidity), which requires auxiliary wind finding e.g. by weather radar, and the Vaisala radiosonde RS92-AM for defense customers who have access to Precise Positioning Service (PPS) GPS receivers. 

The RS92-D is a 1680 MHz addition to the RS92 radiosonde family. It replaces the RS80-67 and is used with Vaisala Radiotheodolite RT20 systems.

As a CAL-4 calibrated radiosonde, the RS92 offers national meteorological services the world’s highest level of PTU (pressure, temperature, relative humidity) measurement performance. Furthermore, the code correlating GPS technology of the RS92-SGP supports national upper-air programs with continuous wind data availability at high resolution.