18

As per the March 4 JPL News story, only DSS43 has the right S-band transmitter, enough power and is in the right hemisphere to talk to Voyager: Moreover, a special S-band transmitter is required to send commands to Voyager 2 - one both powerful enough to reach interstellar space and on a frequency that can communicate with Voyager's dated technology. The ...


13

There is some indirect evidence that Arecibo's loss has already impacted communication with some of the deep space probes. NASA's official statement on Arecibo says this: NASA’s Goldstone Observatory in California, another planetary radar, recently returned to full operations after successful delivery and testing of a new klystron tube for its high-power ...


10

This is done in a anechoic chamber. Such chambers are padded on the inside with material that absorbs electromagnetic waves. On the outside, the rooms are shielded like a Faraday cage, so that no external radiation enters the room. They put the whole satellite in the room and by putting a transmitter and receiver in the room in the right locations and using ...


6

Voyager's antenna is pointed at the sun. The transmitter on earth must be powerful enough to stand out against the sun, at least within the (very limited) receiver bandwith. All other sources of noise are negligible and thus not listed in the link budget. The noise power spectral density seen by voyager depends on the power spectral density of the sun in ...


5

We assume a transmitter with 20 W on one side and a receiving antenna with 3 m diameter on the other side. When we increase the power from 20 W to 200 W, we have 10 times more power. We may reduce the area of the antenna to 1/10 and its diameter to 1/sqrt(10). Instead of 3 m we may use now 0.95 m. We need 2 KW instead of 20 W to reduce the diameter by 1/...


5

There are two speeds involved in getting data from a space probe to earth. Transmission travel time is fixed by the speed of light and being in a vacuum is already at its limit. New Horizons is far enough away that even at the speed of light it takes hours for any signal to reach earth. And any relay stations will just increase that time because of longer ...


4

China has done it with NASA China used signals sent from NASA’s Juno probe orbiting Jupiter to test the capabilities of ground stations vital to its deep space ambitions. Scientists involved in developing China’s tracking, telemetry and command (TT&C) capabilities listened-in on signals sent from Juno and successfully determined the spacecraft’s Doppler ...


2

That temp ( ~ 1550 K ) looks suspiciously like the maximum Zodiacal dust grain temp before sublimation Thus the dominant thermal blackbody background Voyager is likely to ever see : " https://www.researchgate.net/figure/Dust-grain-equilibrium-temperatures-vs-distance-from-the-host-star-KIC-3542116-for_fig5_319210038 "


1

It is too late now to think about a repair. The instrument platform crashed into the dish at the first day of December.


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