NASA's Deep Space Network (DSN) is a collection of three antenna complexes spaced roughly 120° apart around Earth: Goldstone (California, USA), Madrid (Robledo de Chavela, Spain), and Canberra (Australia). This spacing ensures that any spacecraft beyond Earth orbit is always in view of at least one complex. The DSN communicates with every interplanetary mission — from the Voyagers at the edge of the solar system to rovers on Mars.

Uplink (orange) means the antenna is transmitting commands or data TO a spacecraft. Downlink (green) means it is receiving data FROM a spacecraft. Most active passes involve both simultaneously — the ground station sends instructions while receiving telemetry, science data, or navigation signals.

Data rate depends on distance and antenna size. The Voyager probes, over 24 billion km away, transmit at just ~160 bits per second — slower than a 1980s modem. Mars orbiters can manage megabits per second. The farther the spacecraft, the weaker the signal, and the slower the data must be sent to maintain accuracy.

Each complex has one 70-metre antenna (DSS-14 at Goldstone, DSS-43 at Canberra, DSS-63 at Madrid). These are the most sensitive dishes in the network and are reserved for the most distant or weakest signals — primarily the Voyager probes and spacecraft in the outer solar system. They can also be used for emergency communications with any mission.

The DSN Now feed updates approximately every 5 seconds. This dashboard fetches fresh data at the same interval. The data reflects the actual state of the antennas in near real-time — what you see is genuinely happening right now at the three complexes.

The data is sourced from NASA's official DSN Now feed, the same feed that powers the eyes.nasa.gov DSN Now visualization. It includes real-time dish status, spacecraft targets, signal strengths, data rates, frequencies, and antenna orientation for all three complexes.

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