Communication of NASA With Spacecraft

Telecom Business Review | Tuesday, August 09, 2022

NASA uses the DSN to transmit lists of instructions to the spacecraft.

FREMONT, CA: Spacecraft transmit information and pictures to Earth using the Deep Space Network (DSN), a collection of big radio antennas. The antennas also receive details about the spacecraft and how they are doing. NASA also uses the DSN to transmit lists of instructions to the spacecraft.

NASA spacecraft are probing our planet, our solar system and beyond. So The found data is sent in this form. Spacecraft send information and pictures return to Earth using the Deep Space Network, or DSN. The DSN is an assemblage of big radio antennas in different parts of the world.

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There are DSN locations around Canberra, Australia; Madrid, Spain; and Goldstone, California. Those sites are almost equitably spaced around the planet. As the Earth revolves, we never lose sight of a spacecraft.

What do the DSN antennas do?

Spacecraft transmit images and other information to these big antennas. The antennas also receive details about the spacecraft and how they are doing. Simultaneously, NASA uses the DSN to send lists of instructions to the spacecraft.

How do spacecraft communicate with the DSN?

Our robotic explorers have much to do. The tools they employ to communicate can’t be too weighty, take up too much room, or employ too much power. Small antennas on the spacecraft can beam weak radio signals back to Earth.

The far away a spacecraft is, the larger the antenna you need to detect its signal. The greatest antenna at each DSN site is 70 meters (230 feet) in diameter.

The most remote objects that the DSN communicates with are NASA’s two Voyager spacecraft. Initiated in 1977, Voyagers 1 and 2 investigated Jupiter, Saturn, Uranus and Neptune. Today, Voyager 1 is exploring above our solar system in interstellar space!

Since the Voyagers are so far away, their signals to the antennas are very weak. The power the DSN antennas receive from the Voyager signals is 20 billion times weaker than what is necessary to run a digital watch! So engineers have designed ways to increase those signals so they can be “heard” loud and clear.

After the DSN antennas receive the signals

Centers at each DSN site receive entering information. Then, they transmit it to the Space Flight Operations Facility at the Jet Propulsion Laboratory in Pasadena, California. Finally, the photos and other data are processed and shared with scientists—and the rest of us!

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