Sign up and stay connected to your favorite communities.

sign uplog in
72
Space

NASA Has Developed Autonomous Space Navigation That Uses Pulsars

4 comments
88% Upvoted
What are your thoughts? Log in or Sign uplog insign up
MD-PhD-MBA
Moderator of r/Futurology, speaking officiallyScore hidden · 5 months ago · Stickied comment

Thanks for contributing. However, your submission was removed from /r/Futurology

Rule 9 - Avoid posting content that is a duplicate of content posted within the last 2-3 days.

Original post: http://goedhartvoordieren.nl/?page=r/Futurology/comments/7q09ow/spaceships_could_use_blinking_dead_stars_to_chart/

Refer to the subreddit rules, the transparency wiki, or the domain blacklist for more information

Message the Mods if you feel this was in error

2 points · 5 months ago · edited 5 months ago

So you could pinpoint a satellite's position by measuring how long the light takes to reach the satellite from various stars, and then noting how this changes according to the satellite's movements. However, the light is continuous not pulsed so this doesn't make sense. With pulsars the pulses are in phase relative to eachother, if the satellite moves the relative phases will change. Different positions around the Earth will correspond to different 'phase relations'. I think this is how it works.
https://www.nasa.gov/feature/goddard/2018/nasa-team-first-to-demonstrate-x-ray-navigation-in-space

Well no, the pulsars selected would have different frequencies, so compensating for dopplar is pretty much the same as a ground correction for a GPS satellite. And the proper morion of the stars themselves are know, so that's just another compensation again like a GPS satellite.

Each pulsare would have ephimetric data similar to a GPS satellite. One could treat the pulsars very similarly to a GPS constellation.

I'm trying to explain the technique. You're not contradicting that and not providing an alternative explanation. And different frequencies would make it easier!

Community Details

13.1m

Subscribers

5.6k

Online

Welcome to r/Futurology, a subreddit devoted to the field of Future(s) Studies and speculation about the development of humanity, technology, and civilization.

Create Post

r/Futurology Rules

1.
Rule 1 - Respect
2.
Rule 2 - Future Focus
3.
Rule 3 - Images
4.
Rule 4 - Petitions, Polls, and Fundraising
5.
Rule 6 - Comment Quality
6.
Rule 9 - No Duplicates
7.
Rule 10 - In Depth
8.
Rule 11 - Title Quality
9.
Rule 12 - Original Sources
10.
Rule 13 - Content age
Cookies help us deliver our Services. By using our Services or clicking I agree, you agree to our use of cookies. Learn More.