Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [artificial-satellite]

Questions about objects in orbit which are human made, such as communications and GPS satellites, orbital observatories and space stations, and other man-made object in permanent or semi-permanent orbits around the Earth, other celestial objects, aside from the Sun, or even other satellites. Not to be confused with non-orbited man-made objects in space, that are usually referred to as "probes", or simply "spacecraft".

2
votes
0answers
60 views

Can something float on top of the atmosphere? [duplicate]

So this is more of a thought experiment similar to the idea of a space elevator, but bear with me... Can we put something that "floats" on top of the atmosphere? A few ideas A pressure regulating ...
4
votes
1answer
72 views

How is atmospheric temperature measured from a satellite?

How does an Earth observing satellite measure the temperature of the atmosphere? Can they measure temperature at multiple altitudes, or measure the temperature of clouds?
2
votes
0answers
29 views

Code to calculate distance between two satellites using their TLE data? [duplicate]

I am not acquainted with astronomy at all. I am developing an computer application which works on TLE data from space-track.org, and calculates things based on them. I need to find distance between ...
2
votes
2answers
206 views

How do satellites remain safe from space debris and meteorites?

Since space is not that clean, always there is a chance to hit by an asteroid / meteor. So how can satellites remain safe orbiting Earth?
4
votes
1answer
42 views

Mechanics of Sun-Synchronous Orbit & North Korea's KMS-4

QUICK QUESTION: Is North Korea's KMS-4 in a proper Sun-synchronous orbit? https://www.n2yo.com/?s=41332 2016-009A FOLLOW-UP QUESTION: How do I tell? I want to understand the mechanics. RESEARCH:...
5
votes
3answers
116 views

Are sun-synchronous orbits always North to South?

So someone told me that weather satellites orbit from north to south generally because that helps them to obtain a sun-synchronous orbit (his explanation for why this was true was too complicated for ...
3
votes
1answer
113 views

Why is Angular Momentum of Satellite Rotating in ECI Frame?

Summary: The angular momentum per unit mass of satellite is rotating in ECI x-y plane and I can't understand why. I'm very new to orbital mechanics. What I'm doing: I'm taking the cross product of ...
4
votes
2answers
126 views

What will happen to space machines if Earth is destroyed?

What will happen to rovers, satellites, and probes if Earth is destroyed? What will their behaviour be like? How long will they keep functioning? Do they have any programmed actions to take in case of ...
11
votes
2answers
2k views

Why latest Landsat satellites have solar panel on only one side?

It is normal for satellites to have solar panels on both sides of the body. But Landsat satellites, from Landsat 4, seems to have the solar panel on only one side. Are there any specific advantages ...
1
vote
1answer
64 views

How does lightsail 2 plan to raise its apogee

Lightsail 2 is supposed to be a demonstration flight for solar sail technology. They plan to demonstrate that they can raise the apogee of their satellite using only light pressure on their sail. But ...
3
votes
0answers
39 views

What main engine used in a series of environmental satellites has failed more than once (according to the GAO)?

A GAO report on NASA's ongoing projects can be found here. On page 70 while discussing the Lucy mission, it says the ... main engine was the same model used on a series of environmental ...
2
votes
0answers
50 views
3
votes
1answer
101 views

Could you use magnets to orient in space?

If I had a tiny satellite with a magnet orbiting Earth (or another body with a magnetic field), could I use this magnet to adjust my attitude? I'm thinking it could be used in sort of the same way as ...
5
votes
0answers
57 views

What are the space-based optical satellite sensors?

I was looking at a products page for Numerica Corp, and under their product MFAST it said (emphasis mine): Tracks objects in all regimes of space (e.g., LEO, MEO, HEO, GEO) using radar, ground-...
3
votes
1answer
103 views

Satellite Telemetry on the Internet

Are there any web sites that show real time telemetry such as temps, bus voltages etc? Looking for one to follow.
2
votes
1answer
127 views

Is it possible to capture geostationary satellites with DSLR?

DSLR is to be mounted on a tripod and pointed at sky with a zoom lens. Would a sufficiently long duration of exposure reveal these non-moving satellites as bright "stars" amongst the streaks caused ...
5
votes
0answers
82 views

What are the effects of orbital reflectors and advertising on scientific observation?

There's a couple of startups and initiatives which are proposing "space billboards" which have been getting a lot of bad press recently. Most of the proposals involve a bunch of cubesats with large ...
4
votes
1answer
74 views

Distribution of satellites by inclination

What is the distribution of Earth orbiting satellites by inclination? In other words, what inclinations are more or less popular? I work with Earth observation myself, where many satellites are Sun-...
2
votes
0answers
65 views

Computing the local orbital frame vector directions and angles of gyroscope direction in the satellite

In the context of the study of a cubesat (little satellite), I am asked to define the local orbital frame and compute the local orbital frame vector directions as a function of time (...
2
votes
1answer
170 views

What is a satellite trap?

I keep hearing about satellite traps, which have something to do with receiving and transmitting satellite communications, but I can't seem to find a definition. The securityaffairs.co blogpost Hack ...
1
vote
1answer
104 views

Why satellite’s solar panel wattage is often listed in specifications?

What is the purpose of listing the power output (Wattage) from solar panel, without the energy/power specification of batteries or other electrical storage devices? Do satellites often use the power ...
0
votes
2answers
110 views

Can satellites launched from space run only on electricity?

I need to know this fast, before February. I am not skilled in astronomy, as I am only in fifth grade. Please answer with a sensible answer, and with a simple "yes" or "no" at the beginning. Thank ...
1
vote
4answers
94 views

Info on distances to objects in space

Can a cheap telescope tell you how many miles/km away an object is that you focus on? (Via some digital readout onscreen, or perhaps via some calculating function that you can access in its computer.) ...
1
vote
0answers
46 views

Cis-L2 Libration Point Halo Orbit

Queqiao became the first satellite to orbit the Cis-L2 libration point (far side of the moon). Link: https://en.wikipedia.org/wiki/Chang%27e_4 Does anyone have any insight on how to model this orbit ...
8
votes
1answer
1k views

What is the most aerodynamic Satellite?

From what I understand at least in the lower orbits you want the least amount of drag possible. My brain is telling me that a long pole or submarine shape satellite orientated to the direction of ...
3
votes
5answers
1k views

Could rockets launched from the ground use wings in the stages?

Could a slower or smaller rocket take advantage of lift if all the stages had wings? Could the stages reduce splashdown impact forces by using a spinning seedpod-like design (as shown in the image ...
2
votes
1answer
131 views

Where can I find the TLE of ExseedSat 1, India's first ever private LEO satellite?

On 3rd December 2018, a private Indian company Exseed Space launched it's first ever satellite into space called ExseedSat 1. But I couldn't find the TLE for this satellite. I looked it up on n2yo ...
1
vote
0answers
83 views

Parasite Satellite

With computers and technology becoming lighter and is also effected by drag. Could a small satellite that lacks certain systems be designed to utilize an existing satellites systems like radio, solar ...
2
votes
0answers
87 views

Are 2 satellites joined better than 2 apart?

Could new satellites be designed to intercept other older functioning artificial satellites or space junk already in orbit to add weight to the new satellite in order to last longer in orbit?
-2
votes
1answer
355 views

What is the origin of Black knight satellite? [closed]

Is it true that an extraterrestrial satellite orbits earth in retrograde? If the Black knight exists, can we presume that it is placed there by aliens who are technologically more advanced than ...
0
votes
1answer
174 views

Artificial ring around the Earth?

What pros and cons would a orbiting ring have for Earth? Is there enough satellites in orbit to form a joined ring?
3
votes
1answer
95 views

Simulating a nanosatellite lunar flyby

I am trying to create a Lunar Flyby mission for small nanosatellites and I want to plot an orbit for it. The problem is that no website has proper information as to what variables, problems and ...
1
vote
0answers
45 views

Apply forces such that a satellite reaches a given point in space

I'd like to find out a strategy for solving the following simplified problem. A small spherical craft at $t=0$ has a position and velocity vectors $\mathbf{x_0}, \mathbf{v_0}$ in a zero gravity ...
3
votes
1answer
98 views

Satellites around outer planets that act like amplifier to signals from voyager like objects

One issue of deep space exploration is that once the object (like Voyager) is far out in the solar system the physical distance is so great that the signal reaching Earth is very weak. I was wondering ...
11
votes
1answer
3k views

Why are the blueprints of old satellites still not available to public?

There are old, now mostly useless blueprints of old satellites, (or rockets, or pieces of software, or engineer's notes, e.t.c) but they are still closed to public. Why? Can it harm the Space Agency ...
1
vote
1answer
62 views

Which orbit around Earth has the least perturbation?

Which orbit around Earth would have the least amount of perturbation from the moon, Sun etc.? Does an orbit exist where in either direction of travel that the perturbation would be the same? The ...
3
votes
1answer
65 views

What's next for Planetary Resources?

The company Planetary Resources had great success with their Arkyd-6 mission earlier this year and were recently purchased by a ConsenSys. I'm wondering if they have published any plans about future ...
3
votes
0answers
49 views

What would be the equivalent camera performance specification of Earth-imaging satellites, compared to consumer DLSRs?

In order to better understand what Earth imaging cameras are like (as seen in Google Earth) from the point of view of a photographer, I've asked the following. Consumer-grade cameras like DSLRs, ...
4
votes
2answers
72 views

How close will the cubesats be when numerous of them are launched simultaneously?

Checking the onboard video of PSLV C43 gives a feel like the CubeSats are released in very proximity. Does this mean that these CubeSats will be orbiting in such very close proximity through out ...
13
votes
1answer
198 views

Does Mars Reconnaissance Orbiter require “reprogramming” when handling communications for newer spacecraft or landers?

While I was going through the question What happens to Insight's parachute? I learned of the role of the Mars Reconnaissance Orbiter to provide reliable communication between other Mars spacecraft and/...
3
votes
2answers
620 views

Why was MarCO-B CubeSats flying away after InSight landed?

Farewell to Mars November 26, 2018 MarCO-B, one of the experimental Mars Cube One (MarCO) CubeSats, took this image of Mars from about 4,700 miles (6,000 kilometers) away during its flyby of ...
11
votes
3answers
2k views

What will become of the two cubesats deployed as part of the Insight mission?

So as part of the Insight mission, two Cubesats were also launched to relay data during landing (so data can be obtained if something goes wrong) What becomes of these satellites once their primary ...
5
votes
2answers
157 views

LAGEOS 1's time capsule's positioning in the sattelite

LAGEOS 1 is one of the two LAGEOS (LAzer GEOdynamics Sattelite) sattelites designed to study the movement of continents with minute precision using reflected light from hundreds of reflectors on its ...
1
vote
0answers
41 views

Distributed computational power-sharing and orbital supercomputer

I had an interesting conversation last night with a nanosatellite engineer about how much computational power is required in a nanosatellite constellation and if it's necessary. I had an idea or a ...
3
votes
2answers
136 views

How much fuel to maintain VLEO for communication satelites?

A recent answer about communication satellites in VLEO (≤350 km) estimates a useful orbital life of about month without fuel. I.e. Once the vehicle is out of fuel to maintain orbit, THEN it has ...
5
votes
1answer
114 views

Why the PRN obtained from Android is different from calculated by TLE

I want to use TLE data to calculate the azimuth and elevation of every GPS satellites at user's location. In order to verify the correctness of TLE calculation, I wrote an Android app that can be ...
12
votes
2answers
197 views

Is there an end-of-life policy for Martian satellites?

When a terrestrial satellite nears the end of its useful life, it is often de-orbited to burn up in the atmosphere or sent up into a graveyard orbit. This is done to prevent the satellite from being ...
3
votes
0answers
93 views

Geometry of full global coverage with 4 supersynchronous satellites, 3 or 16 control stations

in order to provide a truly global coverage of the Earth from space, including the polar regions, a minimum of just 4 satellites is required. Placed in precise 63.4 degree supersynchronous orbits, one ...
4
votes
2answers
628 views

Could a satellite in LEO “pump” or change mass distribution to gain forward momentum?

Similar to pumping your feet on a child's swing can a satellite run up and down a pole to produce a forward momentum? Red dots is the satellite's position running up and down the pole on an ...
1
vote
1answer
150 views

How accurate can a satellite's orbit be?

How precise can an artificial satellite be when it comes to following the exact orbit in relation to Earth or hitting the same point above Earth in orbit? Which orbit would be the most stable for this?...