Linked Questions

2 votes
2 answers
2k views

How to compute footprint(size) of beam of sat.system?

I need to compute the footprint (ground area that its transponders offer coverage) of beam diameter. Given different frequencies, distance between a satellite and ground station. I have found the same ...
Adil.Kolenko's user avatar
5 votes
2 answers
267 views

Is it possible to use the Starlink laser mesh network for science? What kind?

In the news there was an article about Starlink beaming 42 million GB of Data per day. Also it states that the lasers form a global mesh network of 9000+ lasers. There are 260.000 acquisistions per ...
twildeman's user avatar
  • 151
3 votes
2 answers
709 views

What is the theoretical smallest size limit for a phased array antenna that can reach LEO?

Now that one provider is operating a phased array ground-to-satellite internet comm system, others will follow. A frequently asked question is "When can we use Starlink with a sat phone?". ...
SpaceInMyHead's user avatar
9 votes
1 answer
454 views

Tradeoffs between using two 34 m and one 70 m Deep Space Network dish?

Discussion at this answer to Why does DSN sometimes uses two dishes at the same time to receive Voyager-1? include the possibility that in some cases it would be preferable to use two 34 meter DSN ...
uhoh's user avatar
  • 149k
1 vote
1 answer
624 views

How does a 22 dBi X-band "patch" antenna get so much gain and how well behaved is its high-gain radiation pattern?

@NgPh's answer to How will the LICIACube cubesat transmit DART impact images back to Earth? What kind of antenna and radio will it use? quotes LICIACube on DART mission: an asteroid impact captured by ...
uhoh's user avatar
  • 149k
2 votes
3 answers
210 views

Satellite-Ground link and Intersatellite link

I have seen an answer here how we can compute link budget in satellite communication. Link Budget $$ P_{RX} = P_{TX} + G_{TX} - L_{FS} + G_{RX} $$ $P_{RX}$: received power by spacecraft $P_{TX}$: ...
user176070's user avatar
3 votes
1 answer
402 views

Does the Juno spacecraft have an "open signal, by design"?

The click-bate title'd Space News article China quietly used NASA’s Jupiter probe to test its deep space network contains the quoted material below. Everybody listens to everybody else's spacecraft's ...
uhoh's user avatar
  • 149k
2 votes
2 answers
228 views

Is it possible to send a CubeSat to Saturn/Enceladus?

I was wondering if it is technologically possible to send a CubeSat/Nanosatellites or constellation of nanosatellites to explore the water vapor jets in the southern region of Enceladus in the Saturn ...
John's user avatar
  • 1,377
3 votes
1 answer
556 views

Power and frequency units used in 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 ...
uhoh's user avatar
  • 149k
6 votes
1 answer
337 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?
Uwe's user avatar
  • 49k
2 votes
2 answers
238 views

How does Hayabusa-2's "Communication Simulator" on its website work? What does it show?

The pinned tweet on Hayabusa-2's Twitter account leads to http://haya2now.jp/en.html which is a kind of control panel readout of the spacecraft's situation. I clicked ...
uhoh's user avatar
  • 149k
2 votes
1 answer
452 views

Will there be "Near Space" Ka-band allocations for TESS?

update: More information in Phys.org's news item TESS mission to discover new planets moves toward launch, including a video of the telescope array's final assembly. Also see GSFC's TESS page. The ...
uhoh's user avatar
  • 149k
2 votes
1 answer
231 views

Deep Space Network's transmitter power versus frequency?

Just a general question: In regards to the Deep Space Network antennas, how does power from the transmitter of the antenna relate to the frequency used? I believe the antennas use X band frequency for ...
Kevin's user avatar
  • 23
1 vote
1 answer
224 views

Do we use masers, lasers or infrared lasers to send data from deep space back to Earth? If not, why not?

I have posted in a couple of places (including here) about the recent (in the past year) news about future probes, landers, etc. using strong visible light lasers to send data back to us at much ...
Kurt Hikes's user avatar
2 votes
1 answer
156 views

Possible interference in RF spectrum due to space-based internet

Multiple Commercial Operators plan to use satellite megaconstellations for providing internet coverage in near future. Is there a possibility of interference between RF spectrum already in use for ...
pat_nafs's user avatar
  • 199

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