Questions tagged [satellites]
Satellite is a generic descriptor for any body that orbits a much larger body. The term commonly refers to objects orbiting planets, like artificial satellites and moons, but it can sometimes also refer to planets, small stars, satellite galaxies, and other objects.
347
questions
2
votes
1
answer
623
views
Can a satellite generate electricity by using a planet's magnetic field? [duplicate]
I am entering AP Physics E&M and don't have much knowledge about electricity but always had an idea based on my limited knowledge.
If a satellite had a metal coil inside of it, wouldn't it have an ...
0
votes
0
answers
27
views
Better equations for modeling and simulating a halo orbit?
I'm trying to model a halo orbit at low altitude (10m from surface). The satellite is using propulsion to trace the circular halo path. It looks like this "from the top" (the blue ball is ...
- 231
0
votes
1
answer
31
views
How can the current be sustained in a tethered satellite system?
I have a question about how the current is sustained in a tethered satellite system TSS-1R.
In the most simplified model, the system is basically a straight wire (connecting the shuttle and satellite) ...
- 203
0
votes
1
answer
48
views
Would an Hypothetical Ringworld Positioned Inside the Moon's Orbit Around Earth, gravitationally affect Earth?
If a ringworld were to encircle Earth within the orbit of the Moon, would it induce any gravitational alterations on Earth?
I grasp that inside a circular structure, there might not emerge a ...
0
votes
0
answers
25
views
Elevation angle of LEO satellite as a function of time
Let a point on Earth be denoted with (lon,lat,altitude).
Let a LEO satellite be defined by its altitude and inclination.
I would like to compute the angular speed and elevation as a function of time.
...
- 1
0
votes
0
answers
24
views
How does moving the pericenter affect the apocenter?
A perfectly circular orbit of a constant height (distance from the center of mass of the orbited planet) around a perfectly spherical planet with smooth surface and no gravitational anomalies will ...
0
votes
0
answers
24
views
Potential Perturbation of the Ionosphere by Artificial Re-entry Plasma Dust
Recently I read on Spaceweather.com
https://spaceweatherarchive.com/2024/02/
a surprising paper according to which the space debris or vaporized material (mostly metals) that has been deposited in ...
- 325
30
votes
4
answers
10k
views
Why doesn't the Moon disrupt the orbits of geostationary satellites?
If a passing star can jostle comets in the Oort Cloud, why doesn't the Moon disrupt the orbits of high-flying satellites?
Or does it? Maybe the satellites need periodic course corrections?
- 411
0
votes
1
answer
76
views
At what angle should an object be thrown to get it into orbit?
Yes this question is on the internet and has a lot of answers but they all suggest orbital velocity in an ideal circular orbit. I want it for an elliptical orbit. I have a few questions and ...
- 91
0
votes
0
answers
105
views
Calculating Azimuth, Elevation and skew angles when pointing toward sattelite
I have some phased array antenna which is installed on aircraft and pointing itself (azimuth, elevation, skew polarization angles) by plane angles (lat, long, roll, pitch, heading) and satellite ...
- 121
0
votes
2
answers
70
views
Book Recommendation about radio frequency antennas and satellites
I have recently obtained a job in the field of radio frequency antennas and satellites, and I am interested in delving deeper into the subject. Could you recommend any books that cover these topics ...
1
vote
2
answers
141
views
Is a satellite revolving in Earth's orbit also affected by the gravity of the Sun or other planets?
The Earth revolves around the Sun and a satellite also revolves around the Earth. The Sun has a gravitational effect on all celestial bodies, so does it also have an effect on the satellite? If so ...
- 113
6
votes
3
answers
781
views
Is the mass of Satellite + Earth system less than their individual masses?
I understand that when a Earth + Satellite system forms (satellite comes into orbit) the total energy is -ve. If the energy of the system when placed at infinity is 0 (assuming P.E and K.E is 0 at ...
- 79
1
vote
1
answer
43
views
Is it possible for 4 satellites cannot render a position fix on Earth?
I recently learnt about how GPS works and how it uses the intersection of spheres to locate a person which got me thinking whether 4 spheres can always guarantee a position fix. My understanding is ...
- 25
0
votes
1
answer
46
views
How to calculate losses due to diffraction?
Assume a transmitter with a laser source generating gaussian beams and is transmitted using a telescope with radius of aperture $a_T$. The light is collected at the reciever end using a telescope of ...
- 161