Questions tagged [deep-space-network]

Deep Space Network is a series of communication antennas around the world used for communication with deep space spacecraft.

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27
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1k views

How will the closure of the Arecibo dish impact deep space communications?

Earlier today, the U.S. National Science Foundation announced that it is decommissioning the Arecibo radio telescope. The 305 meter dish is famous for the 1974 message for extra-terrestrial ...
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How hard is it to receive direct signals from vehicles on the surface of Mars, and has anyone other than the DSN done so?

Almost all communication from vehicles on the surface of Mars is relayed by spacecraft in orbit around Mars. However vehicles on the surface do communicate directly with Earth. This communication, ...
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Why was Canberra able to listen to Voyager 2 but not talk to it?

The New York Times's When Voyager 2 Calls Home, Earth Soon Won’t Be Able to Answer explains that because Voyager 2's trajectory has taken it way below the ecliptic, of the three 70 meter dishes in the ...
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How do Russia, China, Japan, and India track their spacecraft?

NASA and the ESA have Deep Space Networks that circle the globe enabling them to track their spacecraft constantly. However, Russia, China, India, and possibly also Japan, only list tracking stations ...
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What makes time on the DSN so expensive?

David Hammen wrote in a comment on Why there is not a single orbiter for Uranus or Neptune? that: The two Voyager satellites still receive multiple Deep Space Network contacts per week, each of ...
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How did NASA's Deep Space Network encode and broadcast music to Opportunity?

@Ingolifs's answer to the question What was the last message to Opportunity today (13 Feb '19)? quotes ArsTechnica's Opportunity did not answer NASA’s final call, and it’s now lost to us: Late ...
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How much RF transmit power does DSN need to send commands to Voyager?

I recently looked up how weak the Voyager signals are when they get to Earth from the 22 W transmitters (as of September 2013, it was roughly -245 dBm). But that got me wondering how many watts of ...
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What's stopping space probe communication from being jammed?

Space probes use radio waves to communicate back to Earth - I would imagine a probe sent many decades ago, using very little energy and from very far away would be sending an incredibly weak signal ...
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1answer
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Has DSS-43 ever been used in high power mode (>>20 kW) for an emergency situation?

This answer notes that while most Deep Space Network transmitters are 20 kW of power or less, one dish (DSS-43 in Canberra) is equipped with a transmitter capable of 400 kW. As described in 101, 70-m ...
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Why doesn't thermal radio emission from a DSN “hot dish” completely swamp the benefits of a cold LNA?

The 70 meter DSN dishes are often used to receive the weakest signals, and so their receiver LNAs have cryogenic front-ends in an assembly that also contains a LHe refrigerator and vacuum system. If I ...
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What is the numbering system used for the DSN dishes?

The title "What is the numbering system used for the DSN dishes?" pretty much sums it up. DSN dishes are referenced by seemingly arbitrary numbers: 14, 55, 36, etc... Do these numbers carry any ...
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Would an orbital Deep Space Network be more efficient?

Deep Space Network sites in California, Madrid and Canberra perform an excellent job, for example receiving from Voyager 2 (16+ billion km) at -150 dBm power. However, would it be more advantageous ...
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Is there any publicly available logging, or “Wayback Machine” for DSN Now activity?

This question and especially this comment address activity associated with the Juno mission, both circa arrival, and the relatively quiet transit period to Jupiter. The idea is that there may have ...
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Autonomous Navigation for deep space missions

Autonomous navigation started in early phases of deep space exploration as a provision to achieve accuracy for planet/natural satellite targeting and approach, where radio tracking accuracies were low,...
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587 views

Where were the complexes of the Soviet counterpart to the NASA DSN located?

The NASA Deep Space Network is a means to get a 360 view of the heavens from zenith to nadir. The NASA DSN complexes were functional as of 1965 providing support to the Apollo Program. More recently ...
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How many space-craft can a station on the DSN communicate with concurrently?

A bit of spin on Which LEO missions are currently supported by NASA's DSN (and why)? is what I have in mind. The Deep Space Network home-page writes to say Each complex consists of at least ...
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Is it possible for the Deep Space Network to use MSPA and antenna arraying simultaneously?

Suppose Mars Odyssey (ODY) and the Mars Reconnaissance Orbiter (MRO) are being tracked by antenna A (just for example) at the Goldstone Deep Space Network complex in MSPA mode. Is it possible for ...
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What exactly is the interaction that blocked Juno's data downlink near solar conjunction?

According to Space.com's article Juno Phones Home: Jupiter Probe Reconnects with Earth After 8th Flyby, Juno's recent close flyby of Jupiter and data collection happened while Jupiter was too close to ...
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What was happening with the DSN/ Cassini?

I decided that I wanted to see DSN receive the last bits of data from DSN Now. The last data was supposed to be received at about 7:55. The signal seemed to continue strong until about 10 minutes ...
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What do the different “Testing” codes mean on NASA's Deep Space Network website?

If you haven't seen it, you can monitor the status of the Deep Space Network's radio dishes (which communicate with pretty much all of our space probes and satellites) from this website. At times, ...
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How does one test Ground Segment communications with, and “downlink” data from a spacecraft that's still on the ground?

NASA News item Ground Segment Testing a Success for NASA’s James Webb Space Telescope says: Testing teams have successfully completed a critical milestone focused on demonstrating that NASA’s James ...
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Signals to a deep space network

First of all, sorry for the general context of the question but I’m very inexperienced. I hope I'm not breaking the rules. Simplifying, in the short sci-fi novel I’m writing there’s a super-...
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Deep Space Network time budgets per spacecraft - is such statistics available?

Is statistics available about time consumed by different spacecraft for communication wint NASA Deep Space Network (DSN)? It would be interesting to compare which space missions are more downlink-...
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Equipment needed to contact ICE/ISEE3 Spaceraft

A few days ago, I was reading the wikipedia entry for the International Cometary Explorer (ICE) / International Sun-Earth Explorer 3 (ISEE-3) satellite, that was launched August 12, 1978. Down near ...
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What are the operating systems and network stack in the Chandrayaan - 2 vehicles?

I am trying to find the information about the operating systems that are run in all of the Chandrayaan - 2 vehicles, the orbiter, lander and Rover. Are these just firmwares? Or how are different ...
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Will Exo Mars serve as a relay for non ESA/Roscosmos missions?

I know that Exo Mars TGO is intended to be a relay for Exo Mars Schiaparelli and Exo Mars Rover. However the orbiter could also serve as a relay for other missions. Is there currently any plan for ...
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Has JPL been affected by the November 2018 California wildfires?

The Deep Space Network Now page shows no activity at all. Two hours ago, there was only testing on two of the Madrid dishes (so it's more than a faulty webpage). I've never seen anything like it ...
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Can ESA control the two Voyager spacecraft?

This is such a dumb question. There are many space organizations. Let's take ESA for this case. Given the two Voyager spacecraft are transmitting a weak radio signal to the Earth, can ESA command and ...
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How is long-distance optical communications coming along in space?

I remember there was a test of optical communication and some data transfer from lunar orbit to earth, and I think the ISS uploaded (or downloaded-up? which is correct here?) a movie from earth. In ...
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If the ESA has its own deep space network, why does it use NASA's?

The European Space Agency has its own network for communicating for spacecraft in deep space, ESTRACK. It has stations distributed around the globe: Nonetheless, several ESA missions use NASA's Deep ...
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Examples of evolving networks in Space Exploration [closed]

I'm a master student working on networks analysis in general. A network is something that has nodes and there are links between the nodes. Nodes and links could have attributes. An evolving network is ...
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How do we track the exact location of the spacecraft which is millions or billions of miles away from us?

How do we track the exact location of the spacecraft which is millions or billions of miles away from us? What things do we study for tracking purpose? How exactly do we predict?
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Is Deep Space Network (DSN) technology sufficient for a crewed Mars mission?

Almost every single space enthusiast is excited about a Mars mission and when we are sending our scientists there. But from the communications point of view, are we ready to test the recent ...
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Why does NASA use higher frequencies even though they have worse Free Space Path Loss (FSPL)?

Looking at the Formula for FSPL we see that it increases with Frequency. Why is X-Band used for Deep Space Communications instead of lower bands like S-Band? Is it a question of data-rates? Is the ...
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1answer
193 views

What happened to the plan to build a DSN antenna array?

More than ten years ago there were plans to build large antenna arrays for DSN, about 400 antennas of 12m diameter. See these NASA papers 1, 2, 3, 4. What happened to these plans?
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Missions at or soon-to-be at Mars and their DSN “codenames”?

I'm "mining" old DSN data and would like to see all communications with spacecraft around Mars. A quick snapshot in their data shows the following codes. I can guess that ...
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Understanding the information contained in the Deep Space Network XML data?

NASA's Deep Space Network activity can be viewed conveniently at https://eyes.nasa.gov/dsn/dsn.html but if you would like data in a more raw XML form, it can be accessed as described in this answer ...
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Why is the operating temperature for the Voyagers' receiver noise calculation about 1550K?

In line 10 of Table 5.2 of DESCANSO IV - Voyager Telecommunications it shows a value of the uplink receiver noise spectral density of -166.7 dBm/Hz, which is 196.7 dBW/Hz which is 2.1E-20 Watts/Hz = $...
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Why does DSN sometimes uses two dishes at the same time to receive Voyager-1?

I just looked at the Deep Space Network site DSN Now at https://eyes.nasa.gov/dsn/dsn.html and I saw that both dish numbers 25 and 26 are receiving a 8.42 GHz downlink signal from Voyager 1. Both ...
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Which LEO missions are currently supported by NASA's DSN (and why)?

NASA's Deep Space Network, a collection of antennae throughout the globe, is sometimes used to support earth-orbiting missions: The NASA Deep Space Network - or DSN - is an international network of ...
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Does NASA's Deep Space Network sometimes listen to other space agencies' spacecraft “just for the heck of it” or other non-mission related reasons?

This answer mentions: It's well known that other countries routinely spy on each other (i.e. the NSA tapping of Angela Merkel's phone). NASA's Deep Space Network's space-related activities (like ...
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Why is the Deep Space Network now testing an asteroid redirection mission that hasn't launched yet?

The Double Asteroid Redirection Test is a planned demonstration of the ability of a spacecraft to impact into and redirect the path of an asteroid. The test is part of plans to develop a system to ...
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1answer
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Is delay-doppler radar imaging of NEO asteroids possible only if it spins fast enough?

Emily Lakdawalla's blog on the Planetary Society's page explains some of the basic principles in the delay-doppler radar imaging of asteroids, and other astronomical bodies by extension. Radar from a ...
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Why does the word “Mars” shows up in google maps when viewing the Goldstone DSN complex?

In the Wikipedia page for the Goldstone DSN complex there are coordinates. If you click them it takes you to GeoHack. I copies the decimal coordinates there ...
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1answer
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Exchange diameter for power in parabolic antenna

If I want to reduce the diameter of a satellite dish, how much power should I add to the transmitter? how is this formula? As I have already been informed a little in this other question I asked: X-...
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1answer
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Effective bandwidth for Mars rovers to Earth

I'm interested in what the effective bandwidth is for, in particular, the Curiosity and Perseverance rovers back to Earth. By 'effective' I mean 'averaged over a sufficiently long period', so at least ...
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1answer
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What is a Beam Waveguide dish and why do deep space communications stations use them?

NASA Spaceflight.com's Deep Space Network upgrades and new antennas increase vital communication capabilities says: NASA’s Deep Space Network, commonly referred to as the DSN, has welcomed a new dish,...
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1answer
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Deep Space Network implementation?

I am interested in understanding the Deep Space Network (DSN), mainly from a network perspective and how it handles the challenges of high latency communication. On Earth, for example we can use ...
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1answer
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How have/how will Indian ground stations be used for comms or tracking of deep space spacecraft?

I have a few data points, but not the big picture. 19-10-2016, the Giant Metre Wave Telescope was used to monitor the doppler shift of a beacon signal from the Schiaparelli spacecraft as it descended ...
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How many solar system bodies have had coherent radio transponders?

A transponder amplifies, (often) frequency-shifts, and rebroadcasts a received signal. Old-style telephone and TV distribution satellites in GEO used simple transponders to rebroadcast the uplinked ...