Reporting More Humidity Data in TEMP

  • ​It has been common practice for many meteorological services to exclude humidity data from TEMP messages at low temperatures. The most commonly used cold temperature limit has been –40°C and it has been applied regardless of sensor design
  • Over the years, Vaisala has continuously improved its polymer based humidity sensor. The performance was already improved significantly with the Vaisala Radiodonde RS80 types. However, the Vaisala Radiosonde RS92 family finally provided a sensor quality which allowed Vaisala to recommend the removal of the temperature limit completely
  • Vaisala recommended that users of RS92 radiosondes change the temperature limit to –100°C and users of RS80 change the limit to –70°C