Linked Questions

11 votes
3 answers
651 views

Is it possible to extend high speed data transmission with lasers to the distance Earth to Mars?

Data transmission using an optical laser between ground station and a GEO satellite may offer very high data rates, up to 1.8 GBit/s for instance. But what about a transmission from Earth to Mars ...
Uwe's user avatar
  • 49.5k
5 votes
2 answers
1k views

Is there a way (working or in development) to track satellites in lunar orbit like we track objects in Earth Orbit?

I understand that Earth orbiting satellites are tracked using technologies such as radar, but due to the distance between the Earth and the Moon, they aren't really useful for Moon sats. Is the ...
Bensas's user avatar
  • 193
10 votes
1 answer
1k views

How do ultra-stable oscillators for spacecraft work?

Many spacecraft carry "ultra-stable oscillators" for ranging and related measurements, but I can't quickly find any info on how these actually work. Are they just very pure quartz crystals, or do they ...
Steve Linton's user avatar
  • 19.7k
8 votes
1 answer
519 views

How far from earth have atomic clocks (or ultra-stable oscillators) been placed and monitored?

The various flavors of GPS satellite constellations use atomic clocks on each satellite. As far as I know, all of the constellations are "shells" of circular MEO orbits in 3 to 6 planes, 20,000 to 25,...
uhoh's user avatar
  • 151k
9 votes
2 answers
1k views

How many satellites would be required for Solar System GPS?

GPS is a Global Positioning System. it uses satellites in orbit to identify precise location on a globe. Several posts here talk about it being used in Low Earth Orbit (LEO) with success. About 30 ...
James Jenkins's user avatar
5 votes
1 answer
310 views

How does an onboard atomic clock help interplanetary navigation?

On 2019 June 22, JPL will launch and test the accuracy of an onboard atomic clock. Its FAQ says that it will improve interplanetary navigation because for the ship to determine its position, instead ...
Camille Goudeseune's user avatar
4 votes
2 answers
171 views

Help understanding exactly how an atomic clock facilitates “self-driving spacecraft” when paired with an onboard camera?

The TechCrunch article NASA details Deep Space Atomic Clock and other tests launching on SpaceX Falcon Heavy says: Jill Seubert, Deep Space Navigator for NASA, explained that this is the world’s ...
uhoh's user avatar
  • 151k
-2 votes
3 answers
366 views

What timezone would be used for interstellar travel?

The ISS crew celebrated Thanksgiving today. Apparently the ISS uses Coordinated Universal Time (UTC), which is equivalent to Greenwich Mean Time. What timezone would people use for interstellar travel?...
CodingMatters's user avatar
2 votes
1 answer
213 views

How high is the first Deep Space Atomic Clock orbiting? Does it receive radiation equivalent to that in deep space?

The Livescience article NASA's Tiny New Atomic Clock Could Let Spacecraft Drive Themselves in Deep Space says: But the radiation still changes the way the electronics operate. And those changes ...
uhoh's user avatar
  • 151k
1 vote
0 answers
114 views

How is Lucy "making use" of a deep space atomic clock?

The entry for Lucy in Wikipedia's Selection of Discovery Mission 13 and 14; Finalists says: The mission will make use of the Deep Space Atomic Clock.81 81https://www.universetoday.com/122822/...
uhoh's user avatar
  • 151k