There isn’t a single formal “amateur deep space network,” but there are several organised groups and communities of radio amateurs and citizen-science teams that regularly detect carriers from interplanetary probes. Most only receive the carrier or telemetry tones (not decoded data), typically at S-band (~2.2 GHz), X-band (~8.4 GHz), or occasionally Ka-band.
Below are the main groups and communities known for doing this.
1. Amateur-DSN community
- Primary hub: the Amateur‑DSN Groups.io mailing list.
- Mostly microwave experimenters in Europe, Australia, and the US.
- Members share:
- spacecraft frequencies
- JPL ephemeris scripts
- detection reports and spectra.
Examples reported by members:
- detection of Cassini at ~8.429 GHz
- tracking Juno nearly 873 million km away
- reception of cruise signals from Tianwen‑1 and Mars 2020 Perseverance.
Typical stations:
- 1–4 m dishes (sometimes larger)
- X-band downconverter
- GPS-locked reference
- SDR waterfall to detect the carrier.
2. Deep Space Exploration Society (DSES)
A US amateur/pro-am group operating a 60-ft (18 m) dish in Colorado.
Activities include:
- detecting spacecraft downlinks around 8.4–8.5 GHz
- developing link-budget tools and detection software
- educational DSN signal experiments.
They’re probably the closest thing to a physical “amateur DSN station.”
3. Individual “ultimate DX” experimenters
Several well-known amateurs run private deep-space receiving stations.
Examples:
- Paul Marsh – received Cassini with a ~2.4 m dish.
- David Prutchi – tracks deep-space probes with 1–3 m dishes.
These individuals often collaborate through the Amateur-DSN mailing list.
4. Hackerspace / citizen ground-station networks
These are not strictly deep-space yet but sometimes participate in experiments.
- Hackerspace Global Grid – distributed community ground-station concept originally intended for satellite tracking and experiments.
Most activity is still focused on LEO satellites rather than interplanetary probes.
5. Historical amateur tracking programs
These show the tradition of amateurs helping space tracking.
- Operation Moonwatch – global amateur network that visually tracked early satellites in the 1950s.
It wasn’t radio, but it set the precedent for amateur participation.
✅ Typical spacecraft amateurs have detected
- Juno
- Cassini
- Mars Reconnaissance Orbiter
- Tianwen‑1
- BepiColombo (carrier detection attempts)
💡 Interesting point:
With a 2–3 m dish, X-band LNA, and modern SDR processing, amateurs can sometimes detect carriers from hundreds of millions of kilometres away, though decoding the telemetry is usually impossible because it is encrypted or requires DSN-scale SNR.
✅ Since you’re doing radio astronomy, you might find this especially interesting:
Some amateurs have successfully used 8–10 ft dishes with hydrogen-line receivers plus an 8.4 GHz feed swap to attempt spacecraft carrier detection.
Here are verifiable references and URLs supporting the examples and claims. I’ve grouped them by topic so you can quickly locate the sources.
1. Amateur-DSN community (mailing list / collaboration group)
- Amateur‑DSN Groups.io – discussion group for amateurs tracking deep-space probes
https://groups.io/g/Amateur-DSN/topics
Evidence of probe reception reports posted by members (Rosetta, Venus Express, etc.):
Technical reference discussing the Amateur-DSN concept and experiments:
2. Amateur detection of deep-space spacecraft
Example of a well-documented amateur detection:
- Cassini–Huygens reception by radio amateur Paul Marsh (M0EYT)
https://www.arrl.org/news/radio-amateur-hears-cassini-spacecraft
ARRL report describing the detection of Cassini’s carrier at 8429 MHz using a 2.4 m dish:
Further description of amateur DSN experiments and spacecraft reception:
3. Amateur DSN experimentation papers and documentation
Work by experimenter David Prutchi (N2QG) documenting reception of spacecraft such as:
- BepiColombo
- Mars Reconnaissance Orbiter
- OSIRIS‑REx
Sources:
- https://www.prutchi.com/category/amateur-dsn/
- https://www.prutchi.com/wp-content/uploads/2020/10/DSN_Lessons-_Learned_N2QG.pdf
Example described in the paper:
Reception of BepiColombo at ~15 million km using a 1.2 m dish and X-band receiver.
4. Amateur long-distance DSN detections
Technical report discussing extreme amateur receptions:
Example results documented in that report:
- reception of Juno and Cassini at hundreds of millions to billions of km
- amateur record detection of Voyager-1 using a 6 m dish and long spectral integration.
5. Hardware and DSN frequency references
Example article discussing amateur equipment used for probe reception:
Explains that interplanetary spacecraft communications typically use
S-band, X-band, or Ka-band and describes amateur reception attempts of:
- Mars Odyssey
- Juno
- BepiColombo
✅ Summary of the most useful starting references
- Amateur-DSN group
https://groups.io/g/Amateur-DSN - ARRL article on Cassini reception
https://www.arrl.org/news/radio-amateur-hears-cassini-spacecraft - David Prutchi Amateur DSN research
https://www.prutchi.com/category/amateur-dsn/ - Technical paper on amateur deep-space reception
https://www.pe0sat.vgnet.nl/download/DSN/David%20Prutchi%20-%20Receiving%20Microwave%20Signals%20from%20Deep-Space.pdf - Microwave conference presentation on amateur DSN
https://www.microwavers.org/eme2012/files/extras/M0EYT_EME2012_DSN-Reception.pdf
The easiest spacecraft amateurs can currently detect (2026) and their exact downlink frequencies, which is often the key missing information for people attempting this:
Here are deep-space spacecraft that amateurs can realistically detect today, along with typical downlink frequencies and links where you can monitor mission activity. Most signals fall in the deep-space X-band allocation (8.400–8.450 GHz) used for telemetry from spacecraft beyond ~2 million km.
Current deep-space signals amateurs attempt to detect
1. Mars spacecraft (often easiest)
Mars orbiters are among the strongest amateur-detectable signals because they transmit tens of watts and are relatively close.
Typical downlink frequencies:
| Spacecraft | Frequency |
|---|---|
| Perseverance rover | 8414.99 MHz |
| Mars Express | 8420.43 MHz |
| Tianwen-1 orbiter | 8431.02 MHz |
| Mars Reconnaissance Orbiter | 8439.55 MHz |
| MAVEN | 8445.77 MHz |
These are all within the 8400–8450 MHz deep-space X-band downlink allocation used by the Deep Space Network.
📊 Amateur stations typically detect these as very narrow carriers drifting with Doppler.
2. Mercury mission (ESA/JAXA)
BepiColombo
Typical downlink:
- 8.419 GHz X-band
- also Ka-band around 31.99–32.07 GHz
The spacecraft uses coherent X-band and Ka-band radio links for telemetry and radio science.
This mission has been detected by several amateur DSN stations during cruise.
3. Jupiter probe
Juno
Typical downlink band:
- ~8.4 GHz X-band
The signal is weaker because of the distance (~5 AU), but it has been detected with ~2–5 m dishes using long integration.
4. Outer-solar-system probes
Voyager 1 / Voyager 2
- X-band ~8.4 GHz
- extremely weak (~10⁻²¹ W at Earth)
Detection requires very large dishes or interferometry but amateur experiments have been attempted.
Useful real-time resources
NASA DSN Now (live antenna tracking)
Shows which spacecraft are currently transmitting.
You can use it to know:
- which probe is transmitting
- which DSN station is receiving
- approximate pointing direction.
Deep-space mission lists and frequencies
Useful DSN technical report listing Mars spacecraft transmit frequencies.
What amateurs actually detect
With typical amateur equipment:
- 2–3 m dish
- 0.5–1 dB LNA
- stable reference (GPSDO)
- SDR + long FFT integration
you can usually detect:
- carrier spikes
- Doppler drift
- sometimes ranging tones
but not the telemetry, which requires much higher SNR.
Why X-band dominates
Deep-space missions primarily use three bands:
| Band | Frequency |
|---|---|
| S-band | ~2 GHz |
| X-band | ~8.4 GHz |
| Ka-band | ~32 GHz |
Modern missions favour X-band or Ka-band because higher frequencies allow higher antenna gain and higher data rates.
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