Upper-Air Weather Observation comprises the Vaisala  Radiosonde RS92 family, the Vaisala  DigiCORA® Sounding System MW21 and DigiCORA® sounding software.

The all models of RS92 work in the 400 MHz meteorological band. They are the Vaisala  Radiosonde RS92-SGP with code correlating GPS wind-finding, the Vaisala  Radiosonde RS92-KL with Loran-C windfinding and 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 . Soon,  1680 MHz models will also be available to complete the family.

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 new code correlating GPS technology of the RS92-SGP will support national upper-air programs with continuous wind data availability at high resolution.