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Questions tagged [radio-telescope]

Questions about telescopes used to detect electromagnetic radiation; specifically radio waves.

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Embedding foundations from low lunar orbit?

Reading about Lunar Crater Radio Telescope and Lunar regolith thickness and composition, (roughly 5-10m of soft soil) and anchoring in soft regolith, would it make sense, in order to anchor large ...
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4 votes
1 answer
390 views

If the largest spy satellites could take pictures, how detailed would they be?

This question is inspired by the NRO's Orion Satellites. These are surveillance satellites placed near geostationary altitude that measure radio emissions. Importantly, they have been described as the ...
A McKelvy's user avatar
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4 votes
0 answers
89 views

Telescope in a crater? How different are the bowl shapes?

When building large stationary single-dish radio telescopes, one of the constraints to location is that the landscape should already have approximately the right shape, cutting down on construction ...
SE - stop firing the good guys's user avatar
2 votes
1 answer
200 views

Following KRT-10 aboard Salyut-6, have there been any other radio astronomy observations from a space station or crewed capsule?

Space stations have certainly been equipped with infrared, visible, ultraviolet and X-ray telescopes for astronomical observation and optical and X-ray communications as well as particle telescopes ...
uhoh's user avatar
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4 votes
1 answer
482 views

Why are deep space "beacons" usually UHF, so low (in freq) that DSN can't hear them? And how unusual is it for a Mars lander to have an X-band beacon?

This answer to Is there independent evidence that China landed a robot on Mars in May 2021? and an extensive comment below it indicate that the Zhurong Mars lander had an X-band beacon, information ...
uhoh's user avatar
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2 votes
1 answer
219 views

Specifications of a High Gain Antenna

I am designing a telecommunications device capable of redundant communication from Earth to Saturn's moon Enceladus which ranges from 8 to 11 AU from Earth. I have decided on an X-band high-gain ...
Jose De La Pena's user avatar
3 votes
0 answers
207 views

What was the most intense beam ever sent from Earth?

By a freak coincidence sensors on a passing alien ship a hundred light years away had picked up a faint artificial blip from Earth, thereby discovering our inhabited planet. But which blip was it? ...
uhoh's user avatar
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27 votes
2 answers
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 ...
DrSheldon's user avatar
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4 votes
1 answer
218 views

What's the status and timeline for Millimetron? (Russia's 10m Deployable Antenna cooled to 6 K Earth-Space VLBI)

Comments below an answer to How does NASA's ASTHROS stratospheric telescope compare to its James Webb space telescope? link to JPL's Paul F. Goldsmith's The Renaissance of High Resolution ...
uhoh's user avatar
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1 vote
0 answers
96 views

What novel technologies did DARE ditch in order to get NASA support?

Business Insider's NASA patented a faster, cheaper route to the moon. The first spacecraft to use it could make Nobel Prize-winning discoveries about the universe. includes a section titled 2 Nobel ...
uhoh's user avatar
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4 votes
1 answer
113 views

At what wavelengths and for what particle types have astronomical objects been imaged or at least directionally resolved from Tiangong stations?

The ISS has an X-ray telescope called NICER and this answer in Astronomy SE (and links therein) explain that it was able to show that there are hot spots clustered near one pole of the pulsar PSR ...
uhoh's user avatar
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3 votes
1 answer
68 views

At what wavelengths and for what particle types have astronomical objects been imaged or at least directionally resolved from the ISS?

The ISS has an X-ray telescope called NICER and this answer in Astronomy SE (and links therein) explain that it was able to show that there are hot spots clustered near one pole of the pulsar PSR ...
uhoh's user avatar
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4 votes
2 answers
238 views

For how many total hours had Arecibo transmitted a signal?

Update: Sadly, parts of the dish have collapsed, several cables have snapped, and the Arecibo radio telescope is now decommissioned and demolition has been recommended because it is now too unsafe to ...
DrSheldon's user avatar
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1 vote
2 answers
303 views

Which map is right? Where exactly were the two Australian dish antennas used in the Apollo missions?

There are two answers to How did NASA achieve their live TV broadcast in 1969? and each has a map that denotes the location of the following two sites Honeysuckle Creek Tracking Station Parkes Radio ...
uhoh's user avatar
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1 vote
1 answer
400 views

What kind of ground-based radio astronomy is NASA's DSN used for? Who are the PIs?

I looked at DNS Now to check on Hayabusa-2 and compare to http://haya2now.jp/en.html and saw that DSS 34 in Canberra is currently in setup/teardown for Ground Based Radio Astronomy! In this status ...
uhoh's user avatar
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6 votes
2 answers
583 views

From whence (what ground stations) do the world's major space agencies receive signals from their missions?

The ISRO web page Ground Segment says: SRO Telemetry Tracking and Command Network (ISTRAC) will be providing support of the TTC ground stations, communications network between ground stations and ...
uhoh's user avatar
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9 votes
0 answers
198 views

Was the Doppler shift of InSight's "tone" measured and plotted somewhere?

I watched a YouTube live broadcast from the InSight mission control area and saw lots of images of happy people cheering and jumping up and down, which is great! If it wasn't 4 AM where I was I might ...
uhoh's user avatar
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4 votes
1 answer
177 views

How does a third DSN station serves as a “relay” to tie-together observations by two other stations doing VLBI?

Section 2.1 of the DESCANSO document 211 Wideband Very-Long Baseline Interferometry (from here, found here) says: The precision of a VLBI measurement improves with the length of the baseline. The ...
uhoh's user avatar
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2 votes
2 answers
245 views

Why will radioastronomy telescopes be used to listen to InSight's entry into Mars' atmosphere instead of DSN?

The JPL News article How NASA Will Know When InSight Touches Down is interesting and worth a read. It says that during the atmospheric entry, descent and landing, the Mars InSight probe will be ...
uhoh's user avatar
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4 votes
1 answer
354 views

Could a radio telescope orbit Earth-Moon L2 so that it is in the Moon's radio shadow?

Chang'e 4, a Lunar orbiter and lander on the far side of the Moon, will put a relay satellite in a halo orbit around EML2 that also will do some low frequency radio astronomy. Since the Chang'e 4 ...
LocalFluff's user avatar
4 votes
2 answers
607 views

How does this strangely-shaped horn at Honeysuckle Creek Tracking Station work?

After reading the BBC article Australia to create national space agency and clicking around to identify the dish antenna shown in the photo in the article, I came across an image of an interesting ...
uhoh's user avatar
  • 149k
0 votes
1 answer
56 views

Is 2012 TC4 part of the Near-Earth Object Human Space Flight Accessible Targets Study?

This nifty answer describes and provides links to the data of the recovery of near earth object 2012 TC4, and the answer also shows the first actual image of the body for this pass. At apparent ...
uhoh's user avatar
  • 149k
6 votes
3 answers
428 views

How was radio telescope observation data transferred before wide availability of high-speed Internet?

We are used to having hundreds of megabits or more per second of data transfer rates at our fingertips, over the Internet, straight to our desks. For higher-end connections, even multiples of gigabits ...
user's user avatar
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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
2 votes
1 answer
182 views

How will "precision formation flying" likely be first demonstrated?

The OP of the question Would a lunar telescope provide a significant improvement over terrestrial based equipment? got slightly trounced for asking "the wrong question", but this answer does address ...
uhoh's user avatar
  • 149k
5 votes
1 answer
324 views

Was the time of Schiaparelli's landing chosen specifically so the Giant Meter Wave Radiotelescope could listen?

The ESA blog post Listening to an Alien Landing describes the plan to monitor a UHF beacon transmitted by Schiaparelli during it's upcoming descent and landing on Mars (2016-10-19 about 14:45 UT). The ...
uhoh's user avatar
  • 149k
2 votes
1 answer
168 views

What is the largest single project (in tonnage) in which an international space cooperative has launched and or constructed in space?

Science fiction has given us countless examples of international space campaigns (exp: Star Trek's "Federation"). But what's the largest and most active space campaign from Earth and how much (in ...
user avatar
4 votes
1 answer
179 views

Will there be joint observations from earth and the Juno spacecraft when it reaches Jupiter?

This is a comparison of a visible light image and a radio image of the area around Jupiter's great red spot from an article in Science News. The radio data is from the VLA, and the frequency is chosen ...
uhoh's user avatar
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7 votes
2 answers
1k views

How far can SETI's ear listen?

With the current infrastructure available to SETI, how distant would it be feasible to pick up routine radio communications and noise from a planet emitting radio with identical power and signal ...
dualredlaugh's user avatar
10 votes
1 answer
230 views

What data are used to do these 3D asteroid renderings?

The number of asteroids that have been directly photographed is very limited, because the probes that do so are very large budget and public. That's why it's surprising to see images like this of ...
AlanSE's user avatar
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2 votes
0 answers
70 views

Would it be possible to create a community-built array-style radio telescope? [closed]

Using off-the-shelf technology, would it be possible to create a community-built array-style radio telescope? Much like the Very Large Array or Square Kilometer Array but using home grown antennae ...
Fezter's user avatar
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