Why this class exists
A Few Dozen Antennas Carry the Solar System's Data
Every spacecraft past low orbit talks home through three ground networks, and almost every machine on Earth takes its time from four constellations.
Deep-space bandwidth is set by aperture on the ground. NASA's Deep Space Network runs 70 m and 34 m dishes at Goldstone, Madrid and Canberra, spaced about 120° apart so one always sees a given spacecraft. It serves more than 40 missions, and a 2023 NASA audit found demand ran up to 40% over capacity. In 2026 it gained one dish and lost another: DSS-23, a new 34 m antenna at Goldstone, went live on 3 August, while Goldstone's 70 m DSS-14 stays dark until October 2028 after an over-rotation incident. Observed
Mars relay is thinning at the same time. MAVEN lost contact in December 2025 and was declared dead in June 2026, leaving Mars Odyssey (launched 2001), the Mars Reconnaissance Orbiter (2005), ESA's Mars Express and the ExoMars Trace Gas Orbiter to relay for every surface mission. Blue Origin's Mars Telecommunications Orbiter, awarded in September 2026, is the first dedicated replacement and reaches Mars by 2030. Building
Ground networks
The Deep Space Network Gained a Dish and Lost a 70-Meter in the Same Year
Three national deep-space networks, plus China's, which spans Kashgar, Jiamusi and Argentina.
| Network · operator | Apertures | Status | Rated |
|---|---|---|---|
| Deep Space Network · NASA / JPL | Goldstone, Madrid, Canberra · 70 m and 34 m | Serves more than 40 spacecraft; a 2023 NASA audit found demand up to 40% over capacity | Observed |
| DSS-23, Goldstone | 34 m beam waveguide | Began operations 3 August 2026 with Chandra as its first track; dedicated 25 August | Observed |
| DSS-14, Goldstone | 70 m | Offline since September 2025 after an over-rotation incident; return expected October 2028 | Observed |
| DSS-33, Canberra | 34 m | Next Deep Space Network aperture, expected 2029 | Projected |
| ESTRACK · ESA | 4 × 35 m | New Norcia DSA 1 and DSA 4, Cebreros DSA 2, Malargüe DSA 3; DSA 4 inaugurated October 2025 | Observed |
| Misasa · JAXA | 54 m | Replaced the 64 m Usuda dish as Japan's primary deep-space station | Observed |
| Chinese deep space network · CLTC | Kashgar 4 × 35 m · Jiamusi 64 m · Neuquén 35 m | The Kashgar array works as a 66 m equivalent; Neuquén, Argentina, opened 2017 | Observed |
Relay
China Runs the Only Far-Side Relay; the West's First Arrives on IM-3
Lunar surface operations at the south pole need relay for the hours and days the Earth sits below the horizon.
| System | Where | Status | Rated |
|---|---|---|---|
| Queqiao-1 · China | Earth-Moon L2 | Operating since 2018; enabled Chang'e-4, the first far-side landing | Observed |
| Queqiao-2 · China | Elliptical lunar orbit | Operating since March 2024; serves Chang'e-6, -7 and -8 - the only far-side relay in service | Observed |
| Chinese lunar navigation and communications constellation | Lunar orbit, 30+ satellites | Planned, with up to fourfold coverage of the surface | Projected |
| Tianlian II · China | Geostationary | Tianlian II-06 launched 23 July 2026; relays for Tiangong and low-orbit spacecraft | Observed |
| Near Space Network lunar relay · Intuitive Machines | Lunar orbit | $4.82B ceiling over 10 years (September 2024). First relay, Altus-1, flies on IM-3 in late 2026; two more on IM-4 in 2027 | Building |
| LCRNS and LunaNet · NASA | Standards | Interoperability specification plus the Lunar Augmented Navigation Service signal, modeled on GPS L1C | Building |
| Moonlight · ESA | Lunar orbit | Lunar Pathfinder on Firefly Blue Ghost Mission 2, no earlier than 2027; service targeted 2028 with Telespazio and Thales Alenia Space | Building |
| Mars Telecommunications Orbiter · Blue Origin | Mars orbit | Up to $700M awarded 3 September 2026 on the Blue Ring platform; at Mars by 2030; Rocket Lab has protested | Projected |
Optical
Laser Links Have Moved From Demonstration to Crewed Flight
Optical links raise data rate by an order of magnitude at the same aperture; they are enabling at Mercury, where Earth never leaves the Sun's glare.
| Demonstration | Result | Detail | Rated |
|---|---|---|---|
| DSOC on Psyche · NASA / JPL | 267 Mbps peak | 65 passes, 13.6 Tbit returned, links to 307 million miles; completed September 2025 | Observed |
| O2O on Artemis II · NASA | 260 Mbps down | More than 100 GB including 4K video by flight day four, April 2026 | Observed |
| Starlink inter-satellite lasers · SpaceX | Production scale | Every current Starlink satellite carries laser links; Starlink V3 is rated near 1 Tbps per satellite | Observed |
Navigation and timing
Four Global Constellations, One Low-Orbit Challenger, and Rising Jamming
Navigation signals are a utility every other class assumes.
| Constellation · operator | Satellites | Status | Rated |
|---|---|---|---|
| GPS · US Space Force | 30+ | GPS III SV-10, the last Block III satellite, launched 21 April 2026; first GPS IIIF with a regional anti-jam beam due 2028 | Observed |
| Galileo · EU / ESA | 28 operational of 34 launched | Two satellites entered service in May and July 2026; first second-generation satellite due 2027 on Ariane 62 | Observed |
| BeiDou-3 · China | 50+ | 10 m global accuracy and under 20 ns timing error; next generation by 2035 | Observed |
| GLONASS · Russia | ~24 | Two GLONASS-K2 satellites launched, both held as spares | Observed |
| Pulsar · Xona Space Systems | 250+ authorized | FCC authorized the full low-orbit constellation 3 August 2026; first six production satellites due October 2026 | Building |
| Lunar Augmented Navigation Service · NASA | Lunar | Signal specification for lunar positioning, carried on the commercial relays | Building |
GNSS denial is now routine near conflict zones. Poland logged full GNSS disruption on about 70% of days in May and June 2026, attributed to electronic-warfare systems with Kaliningrad named as the main source; spoofing reaches up to 450 km. Low-orbit signals such as Xona Pulsar arrive roughly 30 dB stronger than medium-orbit GNSS, which is the case for a second layer.
Broadband
Megaconstellations Are Becoming the Relay Layer
Starlink, Guowang and Qianfan carry the traffic for orbital compute and direct-to-device service.
| Constellation · operator | In orbit | Status | Rated |
|---|---|---|---|
| Starlink · SpaceX | ~11,100 | About 12,960 launched by late September 2026; 650+ direct-to-cell satellites with 25 m² arrays | Observed |
| Starlink V3 · SpaceX | 26 | First 26 deployed by Starship Flight 14 on 28 September 2026; about 1 Tbps each | Building |
| Guowang · China SatNet | 234 | Of about 13,000 planned; 25 launches through 30 September 2026 | Observed |
| Qianfan · Shanghai Spacecom | ~200 | Of 15,000+ planned; Phase 1 is 1,296 satellites | Observed |
Contested
Deliberately Not Claimed
The load-bearing uncertainties, tagged with the confidence they actually earn.
The Deep Space Network is a single point for Western deep space. Losing one 70 m dish for three years shows how thin the margin is; ESA and JAXA apertures cross-support but do not replace it.
Commercial lunar relay is unflown. Altus-1 rides IM-3 in late 2026 and Lunar Pathfinder slips to 2027. Until they work, Queqiao-2 is the only operating lunar relay, and it is Chinese.
A Mars relay gap is possible before 2030. Odyssey and the Mars Reconnaissance Orbiter are 25 and 21 years old. If either fails before the Mars Telecommunications Orbiter arrives, surface missions lose much of their data return.
Record
Provenance and Data Sources
- Confidence
- Observed for flown, fielded or measured - Building for hardware and programs in development - Projected for announced plans - Modeled for original analysis
- Status date
- Q4 2026
- Ground networks
- JPL DSS-23 release (August 2026); NASA Office of Inspector General DSN audit (2023); ESA ESTRACK; JAXA Misasa; Chinese deep space network references
- Relay
- CNSA Queqiao-2; Intuitive Machines Near Space Network award (September 2024); ESA Moonlight; NASA Mars Telecommunications Orbiter award (3 September 2026)
- Optical
- NASA DSOC final results (September 2025); Artemis II O2O results (April 2026)
- Navigation
- Lockheed Martin GPS III SV-10 (21 April 2026); ESA Galileo service entries; China BeiDou office (March 2026); FCC Xona authorization (3 August 2026)
- Weakest link
- Deep Space Network capacity and the age of Mars relay orbiters