Linked Questions

9 votes
3 answers
3k views

What changes to Voyager could have been made? [closed]

If during the planning and construction of the Voyager missions they knew what we know now, what changes to the missions would have been most helpful in augmenting the science obtained?
user277093's user avatar
26 votes
5 answers
3k views

How well can Voyager 1 separate Earth signals from Solar noise these days?

This is a follow-up question to Can Voyager 1 receive signals from Earth? and this and this answer. UPDATED: see additional information and discussion below. As it continues to move farther from the ...
uhoh's user avatar
  • 149k
13 votes
5 answers
1k views

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 ...
uhoh's user avatar
  • 149k
11 votes
2 answers
2k views

How cold are the Voyagers now? Colder than LOX? Colder than SOX?

The MHW-RTG model Radioisotope Thermoelectric Generators on the two Voyager spacecraft started out at about 1000C and 300C on the hot and cold sides, but will have dropped somewhat due to slow decay ...
uhoh's user avatar
  • 149k
7 votes
2 answers
1k views

Would it be possible to build a probe that could operate at about 480 °C (900F degrees) without insulation?

I read a question about cooling a Venus lander, and got to thinking that the problem was in building a probe that has no problem with Earthlike temperatures and pressures, then trying to insulate it ...
Howard Miller's user avatar
6 votes
3 answers
819 views

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 = $...
uhoh's user avatar
  • 149k
4 votes
1 answer
951 views

What does it mean when the Voyagers "switch thrusters"?

The Gizmodo article NASA fights to keep the Voyager probes running after four decades says: As another example of the probes' need to adapt to circumstances to keep going, Voyager 2 has fired up ...
uhoh's user avatar
  • 149k
1 vote
1 answer
573 views

Are the Voyager spacecrafts' X-band TWTAs currently set to high or low transmit power? How often were they changed?

In this answer I discuss that the Voyager spacecraft can be commanded to use either high or low power to transmit to Earth on X-band. Question: Are the Voyager spacecrafts' X-band Traveling Wave Tube ...
uhoh's user avatar
  • 149k
2 votes
1 answer
660 views

Are the Voyager probes radio output power scalable?

We know the RTGs will fail one day. Assuming Voyager probes have a full transmitter output power of 22 watts can/will this be scaled down as the need arises?
Alex Hale's user avatar
5 votes
2 answers
196 views

Can a swarm of nano-probes act as a phased antenna of a greater power?

One problem with nano-satellites and generally any small spacecraft is that you can't fit a powerful power source and antenna - their usability outside vicinity of 'adult' satellites or Earth is thus ...
SF.'s user avatar
  • 55k
0 votes
1 answer
186 views

S-Band transceiver schematics [closed]

I'm working on a cubesat, and I want to communicate in the S-Band, arround 2.4GHz. And I'm searching for schematics of a transceiver example with arround 35 dBm of output power. If any have a .pdf, ....
Valentino Zaffrani's user avatar
3 votes
0 answers
146 views

What was the avg temperature of Voyager 1 before it warmed up it’s cameras for the ‘Family portrait’ photo in 1990

In 1990, it took Voyager 1 three hours to warm up its cameras for the Family Portrait photo looking back at our solar system. What was the temperature of the camera before the warm up, or at least the ...
Alan O'Rourke's user avatar