• Humidity sensor with integrated heating to limit saturation or icing
• External ON/OFF power switch and authorization to release indicated on the radiosonde
• Fully automatic preparation (frequency change, verification…) and a simplified balloon train
• Compatible with the Robotsonde, Automatic Radiosonde System
• The M20 is the lightest and greenest Radiosonde on the Market
• Option: Additional analog and/or digital inputs (XDATA), compatible CFH sensors, ECC Ozone, ...

Economic
Reduce transport costs, save up to 20% of gas and no parachute needed
Heated humidity sensor
Humidity sensor fitted with a de-icing device
Robotsonde
Compatible
Automatic balloon launcher system (up to 24 radiosondes)
36g
Ultra light radiosonde and simplified storage
More ecological
Reduced environmental impact (less batteries, less polluting surface)

Cybersecurity
Meteorological data is essential for weather forecasting: it is a crucial pillar for public safety (property and populations) and civil protection, resource management, and essential activities such as aviation, agriculture, as well as emergency and security operations. In a world facing climate disruption and increasing geopolitical tensions, the accuracy and real-time availability of this data are more important than ever and present a true challenge.
​
The mission of Meteomodem is to guarantee the quality, integrity, and reliability of atmospheric data. With its cutting-edge radiosonde technologies, our company supports meteorological services worldwide in their critical missions. Meteomodem has always placed top priority on the security of transmissions, integrating robust solutions to protect the data from any attempts at tampering or interference.
​
However, new challenges and issues have emerged in recent years. The unstable international context and various conflicts, both in Europe and the Middle East, have introduced unprecedented disruptions in satellite communications. Interference (GPS or GNSS) and cyberattacks have become strategic weapons, now directly threatening the collection of meteorological data (both on the ground and at altitude).
​
In response to this reality, Meteomodem is redoubling its efforts to secure its systems. Given the sensitivity of the industries for which our instruments are used (meteorology &climatology, defense, civil aviation, research, and space), we are committed to our users by developing resilient and adaptable solutions, integrating multi-GNSS technologies and enhanced authentication mechanisms. Meteomodem ensures that meteorological data remains accessible, reliable, and protected, even in the most hostile environments.
​
In an uncertain world, Meteomodem must be a trusted partner to ensure access to accurate and secure meteorological information, whatever the circumstances.
We have tested the M20 radiosonde in the most critical areas in terms of GNSS interferences.
Meteomodem, in collaboration with its partners, has successfully tested the M20 radiosonde in regions where GPS jamming is particularly severe. The further developments on the sonde reflect our commitment to overcome challenging environments and to ensure the reliability of data collection. We are confident about the potential of this technology to enhance the accuracy of satellite communication -dependent applications.
3 actions implemented by Meteomodem to secure the reception of meteorological data
GNSS jamming can take several forms: it can be complete signal blocking, where satellite signals are entirely blocked, preventing any reception, or spoofing, where false signals are transmitted to deceive the receiver and distort positional data. These threats directly compromise the reliability of atmospheric measurements if left undetected.

Multi GNSS
reception
The M20 sondes have been equipped with multi-GNSS technology since 2020 to ensure continuity and reliability of data, even in the presence of interference.
Relying on multiple satellite constellations (GPS, Galileo, BeiDou, etc.), Meteomodem’ sondes provide robust and resilient navigation, dynamically adapting to disruptions in order to guarantee the quality of atmospheric data.

Versatile GNSS antenna
Meteomodem has integrated a more versatile antenna, specifically designed to reduce the impact of ground-based interference. This ensures optimal satellite signal reception, even in disrupted or hostile environments, thereby securing the reliability of data transmitted at high altitude.

Barometer
In the event of extreme GNSS disturbances, Meteomodem relies on the built-in barometer to ensure continuity of PTU data (pressure, temperature, humidity). This backup solution guarantees the transmission of essential information, even when the instrument’s position can no longer be obtained via satellite.
All data sent by the sonde undergoes a validation process (checksum) that allows the receiver to verify the integrity of the information received.