Graw DFM-17 (Radiosonde)

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Graw DFM-17 (Radiosonde)
Frequencies 400 MHz,405.99 MHz
Frequency Range 400 MHz - 405.99 MHz
Mode NFM
Modulation GFSK
Emission Designator
Bandwidth 10 kHz
Location Worldwide
Short Description Radiosonde developed by Graw/Noris Group GmbH for upper air weather observation
I/Q Raw Recording
Audio Sample

The DFM-17 is a radiosonde developed by Graw/Noris Group GmbH which contains a temperature, barometric pressure (optional), and humidity sensor for upper air weather observations. It also contains a GPS receiver for position tracking as well as calculating wind speeds.

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.



  • Weight: 63g
  • Size: 90 x 67 x 44 mm
  • Power Supply: 2 x Lithium CR123A, replaceable
  • Runtime: > 240 min.
  • Transmission Rate: One full data-set per second
  • Output power: < 100 mW
  • Error Correction: Code-spreading, Interleaving
  • Temp. Resolution: 0.01 °C (internal)
  • Temp. Accuracy: < 0.2 °C
  • Humidity Resolution: 0.1% RH
  • Humidity Uncertainty: < 4% RH
  • Pressure Uncertainty:
    • > 100hPa: < 1 hPa
    • 100 - 10hPa: < 0.2 hPa
    • < 10hPa: < 0.04 hPa
  • Geopotential Height Uncertainty: < 8 m
  • Wind Speed Uncertainty: < 0.1 m/s

  • Optional: XDATA interface
  • Optional: barometric pressure sensor
  • Optional: heated humidity sensor
  • Pre-flight data check via NFC

Decoding Software[edit]

Hobby Level Software
Official Software

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]

The device itself