Satellite Definition and 687 Threads

Hello, I am trying to find out how to determine the center of gravity of a CubeSat present in an uniform sphere of radius R, using the initial data given by gyroscopes. The satelitte is equipped with magnetometers, gyroscopes, and accelerometers. By taking into account that the only values I...

What is the lowest altitude for a satellite to orbit?

So I am planning on launching a Satellite to promote the Dogecoin cryptocurrency. One of the main points is printing/painting (Or whatever) the logo on the side of a metal panel. How can I make it so it doesn't melt off or turn white from radiation so quickly?

Homework Statement A satellite of mass m_s orbits the Earth in a circular orbit of radius r_0. If the satellite orbits at the upper part of the atmosphere and the friction force f is constant, it would trace an spiral and fall to the earth. but if we suppouse that the friction force is small...

In solar system, we have sun and planets revolving around it. We have satellites orbiting around some of planets. Are all of these are same thing, just differentiated on the basis of size and nuclear processes occurring inside them? I mean, if nuclear processes occurring inside their core its a...

Homework Statement Gravitational force exerted on mass m is GMm/r^2 2. Relevant equations Orbital velocity at distance R from Earth = ##\sqrt gR## Escape velocity = ##\sqrt 2gR## gR = GM/R Fc = mV^2/R F =m.aThe Attempt at a Solution 1) express acceleration of gravity in terms of G, M , and R...

Homework Statement Homework EquationsThe Attempt at a Solution Mercury will be in a state of weightlessness in the satellite . The air pressure pushes down on the mercury in the cup as a result of which it rises in the barometer tube . But since it is apparently weightless , it tries to...

Hi all, I'm performing a thermal analysis of a satellite subsystem (antenna). However, I'm having some issues relating to the model that I'm implementing on ANSYS. I've already computed the values for the solar flux, albedo and IR that the satellite is subject and I've applied it to different...

Homework Statement Which of the following statements about geostationary satellite is correct? a. geostationary satellites must orbit from east to west b. the orbital radius of a geostationary satellite can be varied as long as its period is 24 hours c. it is a constellation of at least two...

Homework Statement A satellite is in a circular orbit passing over the North and South geographical poles as it orbits the Earth. It has a mass of 2200kg and its orbit height is 870km above the Earth's surface. What is the change in momentum of the satellite from when it passes over the...

I must find parameters for equation [1] in this link http://onlinelibrary.wiley.com/doi/10.1002/jgra.50543/pdf for satelite in height from 100km until 300km. Have to use IRI and IGRF. Any help with answer?

Is there a website that has online satellite views of locations recent enough to show results of hurricane Irma?

how to calculate equations of satellite motion because I just thought to make it

Homework Statement A satellite is orbiting the Earth around an orbit of radius R=2.5R0, where R0 is Earth's radius. What additional velocity is needs to be directed along the radius of the orbit so that satellite escapes Earth's gravity? Homework Equations Total Energy= K + U Conservation of...

Hello, I will be thankful if you could explain what appears to me as a paradox. We know that a satellite on a circular orbit, let say around the earth, has a uniform speed given by v=√(GM/r0). Now I would like to accelerate the satellite by keeping it on the same circular orbit r0. The only...

I'm working through a paper "Dynamics of Planetary Rings" by Goldreich and Tremaine (http://www.annualreviews.org/doi/pdf/10.1146/annurev.aa.20.090182.001341). I'm working through p.22 about expanding the potential of an external satellite as a double Fourier series. The external satellite is in...

1. The problem statement, all variables, and given/known data Satellites orbiting the Earth are often put into orbit at different heights around the planet. What affect will this have on the motion of the satellite and how exactly would the motion of a very high orbit satellite differ from one...

klotza submitted a new PF Insights post Assessing the Physics in Edmond Hamilton's "The Second Satellite" Continue reading the Original PF Insights Post.

I've read in the popular media that there is a difference between the two. Is this true, and if so, why?

Hi, everyone! I'm trying to find the period of a satellite orbiting the Earth by the next formulas with: miu= 398600.5; a=36770.48 km; I. 2*pi*(a^3/miu)^1/2 II. 84.489*(a/Re)^(3/2)min III. 0.00016587*a^(3/2)min And I got aprox. 19 hours from both formulas (I. and III.) which is correct. Can...

This weeks Science frontpage article: Source: http://science.sciencemag.org/content/356/6343/1140

Consider an artificial satellite orbiting the Earth and suppose that the atmosphere co-rotates with the Earth. I need to calculate x, y and z components of the atmospheric drag. I know how to calculate the drag in a non-spinning atmosphere and I have all the data to do that, but the Earth’s...

Currently reading the following document which is a bit of a brain overload at the minute! Im considering Equation (4.61). It is the general relativistic correction due to the Schwarzschild field for a near Earth satellite when the parameters \beta, \;\gamma \equiv 1. However, as you will...

Homework Statement A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 × 104 m/s, and the radius of the orbit is 5.25 × 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of...

Hi there guys, I'm struggling! I've been looking at the International Earth Rotation Services (IERS) "standards" for motion of a satellite in GR. the expression is far from trivial and I'm battling to determine where to even start with this bad boy. The expression is given by \Delta...

Hi all, I am not a physics major and have spent some time learning via the university of Google. I would really appreciate a second set of eyes on what I am calculating and tell me if I am correct, or if I have done something wrong along the way. I am trying to calculate MOI and need results...

Homework Statement Satellite m=3 000kg, circular orbit at the height h = 300km above the Earth´s surface. a/ calculate energy ( work ) for delivering satellites into orbit ? b/ during 1 month the satellite approached the Earth of Δh=13,8 km. Prove that the radial component of velocity in...

After talking to a coworker, I looked into the wikipedia article on "Gravity of Earth". I found that the Earth's gravity is not uniform, which makes sense (never thought about it). I have always wondered why satellites de-orbit over time. Someone told me that there is enough space dust to slow...

Homework Statement This is a lengthy problem with 3 parts, so I figured I would keep them separate. I have a diagram that corresponds with the problem as well. GPS receivers find their locations by measuring time differences between EM wave pulses emitted from satellites at known locations and...

Homework Statement What is the average resistance force F acting on the satellite during its flight, m = 3000kg, h=300km. Homework EquationsThe Attempt at a Solution If it is llow orbit, so it inhibits the resistance of the atmosphere. In 300 km is no air, so no resistance ...?

Homework Statement If the Earth has a radius of 6 x 10^6 meters, how high above Earth's surface does a geosynchronous satellite have to be, if it has a mass of 100kg and gravity acts on the satellite with a force of 4.23 x 10^8 Newtons? What is its linear speed? (Assume the orbit is circular)...

According to Cornell university's ask an astronomer site, we figure out the layers and their density of planets by checking the trajectory of a satellite /space probe or something like that, near the planets. But planets are quite spherical. then their density profile shouldn't be effecting the...

I have a satellite orbiting at a velocity of 3850Km/hr around planet Earth in a circular orbit, please help me in calculating it's height of orbit. I do know that the closer a satellite is, the faster it's orbital velocity, and the farther it is the slower it would be, and help me with the formulas?

Homework Statement A 1 500kg satellite is in orbit 250km above Earth's surface. What minimum additional energy is needed to place this satellite in a new stable orbit 800km above Earth's surface? Homework Equations W = delta Ep = -GMm(1/r2-1/r1) Ep = -GMm/r Ek = GMm/2r or 1/2mv^2 The...

a satellite is in circular orbit around the sun. which requires a greater change in speed: the satellite to fall to the sun or to escape the solar system Homework Equations f = gmm/r^2 The Attempt at a Solution Calculated the escape velocity as(2 GM/R)^0.5 how do i find the speed required so...

Homework Statement A 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth. c) Find the Period of the orbit Homework Equations So found the period using (Please see the attachment to review my work.) but I also found it by using...

Homework Statement On the surface of a distant planet, objects experience an acceleration due to gravity of 20 m/s2. The distance from the center of the planet to its surface is 8.0 * 106 m. Find the velocity of a moon that is circular orbit about the planet at a height of 300,000 m above the...

Homework Statement A satellite is orbiting an still planet, the farthest part of the orbit is at 200 km and the closest part at 100 km. what would be the speed of the satellite at the closest part of the orbit at 100 km if the speed at the farthest part is 1 m/s? Homework Equations L=mvr The...

We all know about the launching of a entanglement based communication satellite by China. But, once a Prof. of Quantum physics has told me that it's even "theoretically impossible" as it will be violation of the "law of casualty" as the two points get information ahead of the speed of light to...

Does anyone know how expensive satellite fuels and or cryogens are? If so, could you supply the source? If not, do you have any recommendations where I could look (I've googled and google-scholared things like "satellite fuel cost" but to no avail). Thanks!

Homework Statement A spherical satellite of radius r is moving with velocity v through a uniform tenuous atmosphere of density ρ. Find the retarding force on the satellite if each particle which strikes it (a) adheres to the surface and (b) bounces off it elastically. I know the answer should...

Homework Statement A satellite orbiting the Earth moves to an orbit which is closer to the earth. What happens to the speed and the time it takes for the one orbit of the Earth. Homework Equations It is circular motion so I will use [/B] a=ω^2(r) a=(2π/T)^2/r The Attempt at a Solution If...

China launched five small satellites Thursday, including the X-ray Pulsar Navigation satellite that eventually could help spacecraft headed for deep space navigate, the latest piece of China’s ambitious space program, NASA Spaceflight.com reported. The X-ray pulsar, developed by Aerospace...

I have always wondered what is entailed in the day-to-day operation of a satellite. There doesn't seem to be a whole lot out there about the people who fly the thousands of spacecraft on orbit today and what their job is like. What exactly are the controllers in the ground stations doing at...

Do astronauts watch satellite tv in space?

Homework Statement If the time period of a satellite in the orbit of radius r around a planet is T, then the time period of a satellite in the orbit of radius 4r is T'= ? 2. The attempt at a solution To be honest I have no idea how to solve this. First I thought Keplers third law may be the...

Homework Statement Homework EquationsThe Attempt at a Solution I think if the astronaut can somehow throw it behind himself, against the direction of orbital motion ( 180° opposite ) such that the total orbital velocity of the nut is canceled , it should fall straight down . But this is...

Homework Statement http://www.physics.ox.ac.uk/olympiad/Downloads/PastPapers/BPhO_Paper3_2004_QP.pdf question 3. Should i post a picture of it if its more appropriate ? Note: I'm expected to do this in about an hour [Mentor note: Image of the relevant portion of Q3 inserted] Homework...

China has successfully launched the world's first quantum-enabled satellite, state media said. It was carried on a rocket which blasted off from the Jiuquan Satellite Launch Centre in China's north west early on Tuesday. The satellite is named after the ancient Chinese scientist and...

hi, what's the difference between MUOS satellite and Iridium satellite communications?