This is a WebSDR receiver, located at the European Space Research and Technology Centre in Noordwijk (JO22FF), Netherlands.
It is operated by the ESTEC Radio Club PI9ESA. More information about the WebSDR project can be found on

In the current configuration (2018) 4 SDR USB dongles are used, two in VHF and two in UHF covering the following bands:
- 136.500 - 138.500 MHz meteo satellites reception band
- 144.000 - 146.000 MHz 2m ham radio band and ISS at 145.800 MHz
- 434.000 - 436.000 MHz 70cm ham radio band (typically used by Cubesats)
- 436.000 - 438.000 MHz 70cm ham radio band (typically used by Cubesats)

Click here to get the list of all next satellites passes over ESTEC: heavens above

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Allow keyboard:
j k ← →: freq down/up (+shift/ctrl/alt faster)
u l c a f: USB, LSB, CW, AM, FM
z Z: center/zoom waterfall
g: enter frequency

Frequency: kHz

Or tune by clicking/dragging/scrollwheel on the frequency scale.

? kHz @ -6dB; ? kHz @ -60dB.
Or drag the passband edges on the frequency scale.
Waterfall view:
Or use scroll wheel and dragging on waterfall.

? dB; peak ? dB;
mute squelch autonotch
Signal strength plot:
Call of station that you hear:
Comments, if any:
Note: time, frequency, your name/call, and DXCC information are added automatically.
View the last 20 lines of the logbook, or the entire logbook (ctrl-click for new tab/window).

This WebSDR is currently being used by ? user(s) simultaneously:      compact view

This chatbox is intended to discuss the operation of the WebSDR.
The operators of this site disclaim any responsibility for text appearing in this chatbox.