Could satellite be geo-stationary away from equatorial plane?

Click For Summary
SUMMARY

Geostationary satellites must operate within the equatorial plane, making it impractical to maintain a satellite over a location at 32° N latitude without continuous thruster burns. Current technology does not support a stable orbit at this latitude; however, the Molniya orbit offers a solution for Russian communication satellites, allowing them to maintain a position over specific longitudes while drifting north and south. Theoretical advancements, such as ion thrust systems, could enable a craft to hover over a point on Earth, but energy requirements remain a significant challenge. The European Space Agency (ESA) is exploring low-altitude satellite concepts that could leverage similar technologies.

PREREQUISITES
  • Understanding of geostationary and geosynchronous orbits
  • Familiarity with Molniya orbit mechanics
  • Knowledge of ion propulsion systems
  • Basic principles of orbital dynamics
NEXT STEPS
  • Research the mechanics of Molniya orbits and their applications
  • Explore ion thrust technology and its potential for satellite positioning
  • Investigate the European Space Agency's low-altitude satellite projects
  • Study the principles of orbital dynamics related to non-equatorial orbits
USEFUL FOR

Science fiction writers, aerospace engineers, physicists, and anyone interested in satellite technology and orbital mechanics.

xtempore
Messages
19
Reaction score
13
TL;DR
Is there at least a theoretical possibility of maintaining a satellite directly over a specific point on the Earth's surface.
I hope this is okay to ask here. I'm working on a sci-fi short story, and for the purposes of the story I want to have a small ship that maintains its position over a specific location on the Earth's surface.

Originally, I thought this would be easy. After all, that's what geostationary satellites do. The problem is, they have to operate within the equatorial plane. For my story, the location of interest is about 32° N of the equator.

So, I guess first part of the question is: Would this be doable using current technology? Would the energy requirements be too great to be practicable?

Secondly: Is there some known, or at least theorised, physical phenomenon that could be leveraged by a futuristic technology to achieve the desired result? Given some of the other elements that exist in my "imagined world", energy requirements could be less of a concern.

I'm not sure if this is the sort of thing I'm allowed to ask, but I at least hope that it's a fun mental exercise for some physics enthusiasts and experts with greater knowledge than my own. Even just a suggestion like "Read up on Xyz theory" would be appreciated!

Thanks!
 
Last edited:
  • Like
Likes   Reactions: anorlunda
Astronomy news on Phys.org
It would have to continuously burn thrusters. There is no free fall orbit like that.
 
  • Like
Likes   Reactions: xtempore and berkeman
No they must be equatorial: the orbital plane includes Earth center and so off equator satellites oscillate between hemispheres.
This presents a problem for Russian communication satellites because they are not overhead. They have a special solution Molniya :https://en.wikipedia.org/wiki/Molniya_orbit
 
  • Like
Likes   Reactions: Nik_2213, Frabjous, xtempore and 1 other person
hutchphd said:
This presents a problem for Russian communication satellites because they are not overhead. They have a special solution Molniya :https://en.wikipedia.org/wiki/Molniya_orbit
Oh, that's cool. Thanks for sharing that.
 
  • Like
Likes   Reactions: hutchphd
xtempore said:
Summary:: Is there at least a theoretical possibility of maintaining a satellite directly over a specific point on the Earth's surface.

Would the energy requirements be too great to be practicable?
That's the problem, I'm afraid.
I imagine that there would be a possible orbit that would lie over a particular line of longitude but drift daily, north and south of the Equator. It would be at a similar orbital height as regular geosynchronous satellites but the satellite elevation would need to be followed 'up and down' from equatorial plane over the day.
Interesting idea but would it be of any use?
 
  • Like
Likes   Reactions: Nik_2213
Actually, there is a way that is an extension of current technology if your ship is not too far out and you have some handwavium of some kind to power it. Ion thrust systems are possible using the very thin atmosphere in near orbital space. A sufficiently powerful system could allow such a craft to hover over one spot above the Earth until the engine burned up or the ship ran out of power. The ESA has been looking at the idea as a way of putting up low altitude satellites but as orbital systems, not to hover. Another option would be a powered high atmosphere device that similar to the Atmospheric satellite concept. Good luck with your story.
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 8 ·
Replies
8
Views
885
  • · Replies 7 ·
Replies
7
Views
7K
  • · Replies 10 ·
Replies
10
Views
5K
  • · Replies 21 ·
Replies
21
Views
5K
Replies
18
Views
7K
Replies
7
Views
2K