All Questions
10
questions
0
votes
1
answer
43
views
Distribution of Earth's mass and its role in the nodal precession of satellites?
From what I have read and understood so far, the nodal precession of a satellite in low Earth orbit is caused by the bulge equatorial of the Earth (caused by its rotation on itself) which moves the ...
0
votes
2
answers
138
views
Radius of Circular orbit of a Satellite around Earth always constant (if Space was a perfect vacuum) WHY?
The way I see it:
Assuming space is a perfect vacuum, a satellite should stay in circular orbit with CONSTANT RADIUS around earth forever but I think the radius should gradually decrease for the ...
- 1
1
vote
0
answers
182
views
Difference between Critical and orbital velocity
What is the difference between orbital and critical velocity of satallite ?
I have read that critical velocity is constant value and it does not depend upon altitude. It only gives the velocity of ...
-1
votes
1
answer
87
views
Gravitation question
I’d like to ask the following doubt that came to me after some exercises:
Is it possibile to exactly establish,given a satellite orbiting Earth with a certain $\vec v_{0}$ and distance $\vec R_{1}$ ...
- 101
28
votes
5
answers
11k
views
Build a ring around Earth, then remove the supports
What would happen if we decided to build a giant ring that managed to wrap around the whole world, end to end that was supported with pillars all along the ring and then the supports all suddenly ...
- 429
10
votes
1
answer
15k
views
How to determine satellite position in J2000 from latitude, longitude and distance from Earth?
Due to my task of writing orbit prediction routines I am trying to understand the reference frames better and how to use them ( particularly for Earth orbits ).
I think I get the idea of what ECI (...
- 235
1
vote
0
answers
892
views
Compute and plot satellite position on 2D Earth map
I would like to create a simple satellite tracking software, that will compute the position of a satellite at any time, and show its location on a 2D map of Earth.
Let's assume it is possible to ...
- 235
5
votes
1
answer
4k
views
Duration of Satellite orbit in the shadow of the Earth
I want to determine how many minutes a satellite is in a circular orbit around the Earth at about $1000 km$ altitude. I assumed that the Sun-Earth vector lies exactly in the orbital plane of the ...
- 65
3
votes
2
answers
13k
views
What is geostationary orbit radius?
I'm asking this apparently "general reference" question for the simple reason: I was unable to find whether the quoted everywhere "35,786 kilometers (22,236 mi) above the Earth's equator" means "...
- 2,988
2
votes
3
answers
433
views
How closely may an artificial satellite orbit Earth without decaying appreciably each orbit?
Just what the title states.
An artificial satellite will orbit Earth with some defined angular momentum.
An aircraft,on the other hand, relies upon it's engines to provide continuous forward velocity &...
- 4,723