Vaisala RS41-SG Weather Balloon (Radiosonde)

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Vaisala RS41-SG Weather Balloon (Radiosonde)
Rs41 radiosonde wf.png
Frequencies 400 MHz,406 MHz
Frequency Range 400 MHz - 406 MHz
Mode NFM
Modulation GFSK
Emission Designator
Bandwidth 4.8 kHz
Location Worldwide
Short Description Weather balloon (radiosonde) telemetry data.
I/Q Raw Recording
Audio Sample

Vaisala Radiosondes: RS92-SGP - RS41-SG - RS92-KL

Vaisala RS41-SG and RS41-SGP Weather Balloons.

Currently in the United States, the National Oceanic and Atmospheric Administration (NOAA) is in the process transitioning some of it's National Weather Service (NWS) offices that are part of the upper-air observation program to the Graw DFM-17 radiosonde. Other offices are being transitioned to different variations of the Vaisala RS-41 Radiosonde A list of upper-air sites and their new radiosonde types can be found here on the website.


GFSKGaussian Frequency-Shift Keying deviation Peak-Peak is 4.8 kHzKiloHertz (kHz) 10^3 Hz, with speed at 4800 bpsBits per second (bps).


Typically around 405 MHzMegaHertz (MHz) 10^6 Hz (400-406 MHzMegaHertz (MHz) 10^6 Hz).


RS41-SG with the OIF411 Ozone Sensor module:

Decoding Software[edit]

Hobby Level Software
  • SondeMonitor - Windows or Wine, shareware
  • RS - RS1729 Radiosonde Decoder (compiles on Linux and Windows)
  • dxlAPRS - free toolchain for radiosonde decoding (Linux)
  • RS41 Tracker - Windows, freeware

Decoding Tutorials[edit]

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]