Vaisala RS92-SGP Weather Balloon (Radiosonde)

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

Vaisala RS92-SGP Weather Balloon (Radiosonde)
Frequencies 400.15 MHz,405.99 MHz
Frequency Range 400.15 MHz - 405.99 MHz
Mode NFM
Modulation GFSK
ACF Frame: 1000 ms, Word: 4.166 ms
Emission Designator
Bandwidth 10 kHz
Location Worldwide
Short Description Weather balloon (radiosonde) telemetry data.
I/Q Raw Recording
Audio Sample

Weather balloon (radiosonde) telemetry data. Only transmits during a weather balloon launch. Uses Gaussian Frequency Shift Keying (GFSKGaussian Frequency-Shift Keying)


Frequency Modulation-Gaussian Minimum Shift Keying (FMFrequency Modulation-GMSKGaussian Minimum-Shift Keying) at 4800 b using Manchester encoding.


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

Decoding Software[edit]

Hobby Level Software
  • SondeMonitor - Windows or Wine, shareware
  • Weathersonde - reverse-engineering efforts, GPS position not implemented
  • RS - German Radiosonde Decoder
  • dxlAPRS - Full toolset to decode various weatersondes with rtl-sdr and send aprs data to (Linux/HAM-Radio)

Antenna Setup[edit]

  • DL0HT - special antenna setup from DLOHT to receive multiple sondes at same time (HAM-Radio - German language only)

Decoding Tutorials[edit]

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]