This is the WebSDR receiver, located in Budapest at the ground station of Masat-1 and Smog-1. It is operated by HA7WEN, e-mail More information about the WebSDR project can be found on

Note: you need both Java and JavaScript enabled for this page to work properly. If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2).
The chatbox is cleared every sdr frequency change. This is a websdr software bug, but we do not correct, because the websdr is a closed source software.

Our ground station's 4,5 m parabola occasionally tracks satellites.

SMOG-P (437,150 MHz), ATL-1 (437,175 MHz) and SMOG-1 (437,345 MHz) in test mode.

Next satellite: ESEO
Frequency: 437 MHz

4,5 méteres parabola
Satellite AOS [CEST] LOS [CEST] Duration
ESEO 2019-10-14.23:33:03 2019-10-14.23:44:18 11 18
CUBEBEL-1 (BSUSAT-1) 2019-10-15.07:41:45 2019-10-15.07:52:48 11 28
CUBEBEL-1 (BSUSAT-1) 2019-10-15.09:15:51 2019-10-15.09:26:33 10 24
ESEO 2019-10-15.09:36:21 2019-10-15.09:43:30 7 4.2
CUBEBEL-1 (BSUSAT-1) 2019-10-15.10:52:42 2019-10-15.10:55:02 2 0.45
ESEO 2019-10-15.11:09:54 2019-10-15.11:22:29 12 51
NEXUS (FO-99) 2019-10-15.12:30:02 2019-10-15.12:36:07 6 3.6
ESEO 2019-10-15.12:45:39 2019-10-15.12:56:43 11 18
CUBEBEL-1 (BSUSAT-1) 2019-10-15.16:56:51 2019-10-15.16:58:14 1 0.15
CUBEBEL-1 (BSUSAT-1) 2019-10-15.18:24:49 2019-10-15.18:35:32 10 22
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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:

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

Old messages: