Satellite Definition and 687 Threads

Homework Statement A satellite is in a circular orbit about the Earth at a distance of one Earth radius above the surface. What is the velocity of the satellite? The Attempt at a Solution I assumed the orbital radius was twice the radius of the Earth so GMearth/r= velocity but that...

Hi, I'm a bit confused on how ground tracks for satellite work. I have noticed they orbit the Earth with a ground track that oscillates all around. Why is this? And why does the oscillation change in latitude for every pass around the earth. Thanks. Much appreciated.

1. What is Satellite Motion? 2. What are the main concepts of Satellite Motion? I googled these for 6 hours yesterday and never came up with any solid answers. I have also checked the school library and have found no solid answers either. All that I get is a bunch of experiments that...

The path of a satellite reentering the atmosphere from a very high orbit has two components, one gravitational and the other from the atmosphere. Could there be a discussion of the two separate components using Newtonian gravity with gravity as: g = GM/r^2 that change with elevation as a...

Hi, i am trying to solve the following differential equations for a satellite traveling from Earth to Jupiter using a runge kutta algorithm. The equations are: dr/dt=+-(h/r)[((r/r0)-1)(1-(r/r1))]^(0.5) and dr/d(theta)=+-r[((r/r0)-1)(1-(r/r1))]^(0.5). where r0 and r1 are the radii...

Hi all, I want to ask about satellite communication, How many Specialization in this field if someone want to take master in it

I have a simulation with a satellite that orbits Earth in 3d. Earth's shadow, for simplification purposes (the satellite is pretty close to earth) is either on or off. There's no light diffraction here. It can be represented as a cylinder with radius ~6378km, and an axis which aligns with...

Hi, have you heard about MIRIAH satellite technology? Its the best satellite imagery in the world according to this article. [crackpot link deleted] Can anyone tease out how it works?

I've already attempted to work everything out by the way but my answers seem a little off. Homework Statement A satellite performs a sling shot manoeuvre around a planet. The mass of the planet is 6.00 * 10^{24} kg and the mass of the satellite is 7.00 * 10^{2} kg. The satellite approaches...

Homework Statement A satellite in a circular orbit around Earth has a speed of 7.15x103 m/s. Determine, in terms of Earth's radius (radius of earth= 6.38 x106m): a) the distance the satellite is from Earth's centre b) the altitiude of the satellite Homework Equations FG = GMm / r2...

What all ways can someone look inside a building (through walls, concrete) with use of a satellite and the electromagnetic spectrum. What I mean to say is, which all spectrums of the electromagnetic spectrum can be used to do such a thing? I can attest to it that someone is doing it and I just...

Please Help! Related Rates Satellite Problem Homework Statement A satellite is in an elliptical orbit around the earth. When the satellite is located at any point P on this elliptical orbit, the distance r (in miles) from the center of the Earth at point E to Point P is given by the...

The question: At what speed would a small object have to be launched from the satellite in order to escape earth’s gravity, assuming that the satellite is not moving? The satellite is in circular orbit around the Earth and the radius of the orbit is 4.22 x 10^7. The main problem I am having...

Gravity Problem -- satellite A satellite with a mass of 250 kg moves in a circular orbit 8.00 x 10^7 m above the Earth's surface. (a) What is the gravitational force on the satellite? N (b) What is the speed of the satellite? km/s (c) What is the period of the satellite? h Relevant Equations...

Hello friends, I have a question considering Newton in circular motion. Homework Statement Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. What is the net force of every single...

Is it possible to put in circular orbit an object from Earth's ground? My friend said yes and told me we were going to see how exactly in 2 years when we'll learn about a more formal mechanics. But I've thought about it and I believe it's impossible. My thought is that the satellite will...

Homework Statement A geostationary satellite in orbit around the Earth has a period identical to that of the Earth's daily rotation; the radius of such an orbit is 4.23 \times 10^4 kilometers. A system of satellites is proposed such that 15 satellites are in orbit at the same radius and each...

Homework Statement http://i241.photobucket.com/albums/ff4/alg5045/MUG_co_6.jpg A satellite that goes around the Earth once every 24 hours is called a geosynchronous satellite is in an equatorial orbit, its position appears stationary with respect to a ground station, and it is known as a...

At what altitude will a satellite complete a circular orbit of the Earth in 1.8 hours? i used r=(GMT^2/4pi^2)^1/3 -Radius of the earth. but I am keep getting wrong answer please help

Homework Statement A satellite is in circular orbit above the Earth at an altitude of 7000 km. What is the orbital speed of the satellite?Homework Equations Well, knowing that the mass of Earth of 5.98 X 10^24 kg And the radius of Earth is 6.38 x 10^6 m What equation do I start with here...

the angular velocity of the satellite to be equal to the rotation rate of the earth.given that the radius of the Earth is 6380km and the mass Earth 5.98 * 10^24.how high the surface of Earth should satellite be placed

Homework Statement satellite is in a circular orbit around the earth. The period of the satellite is 25.4 hr. Calculate the radius of the orbit of the satellite. Data: Mass of the Earth = 5.98 x 1024 kg

Homework Statement You are an astronaut in the space shuttle pursuing a satellite in need of repair. You are in a circular orbit of the same radius as the satellite (400 km above the Earth), but 20 km behind it. How long will it take to overtake the satellite if you reduce your orbital...

Homework Statement A satellite of mass m, initially at rest on the earth, is launched into a circular orbit at a height equal to radius of the earth. What is the the minimum energy required for this purpose? Homework Equations GMm/r^2 = mv^2/r PE at surface = -GMm/R PE at orbit =...

Each of the 24 GPS satellites holds four atomic clocks! Why four and not one or two? They are not cheap! Thanks

Derive an equation for the velocity around Earth. Satellite has no mass. Radius not given. Only period, G, and ME (earth) G = 6.67X10^-11 nm^2/kg^2 | Earth = 5.98x10^24 kg | Period = T = 1.20x10^4s I know I can find radius, and then find velocity. But I am supposed to derive an...

Homework Statement a synchronous satellite parked in orbit over the equator is used to relay microwave transmissions between stations on the ground. to what frequency must the satellite's reciever be tuned if the frequency of the transmission from earch is exactly 9.376GHz?(ignore doppler...

I am completely lost. I am taking a course in Space Engineering. I have been asked to predict (without a program/software) when I will be able to see a satelite from a given lat, long from earth. I know the altitude is 350KM and I also know the inclination angle to the equator. It is in a...

Homework Statement At what height (from the ground of the Earth) must be placed a geostationary satellite? Homework Equations The Attempt at a Solution I'm not sure I understand well the question. I guess they are asking for a satellite in such a position that he would not...

Homework Statement A science group put in a satellite of mass m kg into a circular Earth orbit of radius r. The orbital velocity it needs to remain in this orbit is v. They now put another satellite into a similar orbit at the same altitude. Its mass is 3 times m. What orbital velocity would...

Homework Statement How fast must a satellite leave Earth's surface to reach an orbit with an altitude of 895 km? Homework Equations v = √GM/r The Attempt at a Solution G = 6.67 x 10^-11 M = 5.98 x 10^24 r = (6.38 x 10^6) + (8.95 x 10^5) = 7.275 x 10^6 v = √(6.67 x...

Hi there, I received this question with regards to planetary (or in this case satellite) motion: Determine at what height above the Earth an arteficial satellite must orbit if it is to remain in the same place relative to the Earth (Hint: Model the situation using Kepler's Laws of Motion)...

Im aware that due to the oblate nature of the Earth, the satellite's line of apside and line of nodes rotate according to the following formulas (where i = angle of inclination of orbit to Earth and K is mean motion per day) Variance in right ascension of ascending node (\Omega) due to...

A satellite is designed to orbit Earth at an altitude above it's surface that will place it in a gravitational field with a strength of 4.5N/kg b)assuming the orbit is circular, calculate the acceleration of the satlellite and it's direction. since the satellite is rotating around the...

A satellite is designed to orbit Earth at an altitude above it's surface that will place it in a gravitational field with a strength of 4.5N/kg a) calculate the distance above the surface of at which the satellite must orbit g= GMp/r^2 r^2 = (6.67*10^-11)(5.98*10^24)/4.5 N/kg r =...

Currently I am studying about mechanics of satellite orbits, however I cannot seem to understand in the regression of nodes, why the line of nodes would rotate in a direction contrary to that of the actual satellite orbit (irrespective if it is prograde or retrograde orbit) ? Ive tried...

Q.Calculate the velocity of a satellite moving in a stable circular orbit around the Earth at a height of 5200km. A. I wasn't sure which formula to use on this problem is it Ac=(V^2)/r

[SOLVED] A Problem About Satellite Homework Statement To get a flat, uniform cylindrical satellite spinning at the correct rate, engineers fire four tangential rockets as shown in the figure. If the satellite has a mass of 3700 kg, a radius of 5.0 m, and the rockets each add a mass of 250 kg...

Homework Statement Three satellites orbit a planet of radius R. Satellites s1 and s3 have mass m. Satellite s2 has a mass of 2m. Satellites s1 & s2 have orbits 2R from the center of the planet. Satellite s3 has an orbit of 3R from the center of the planet. Satellite s1 orbits in 250...

Homework Statement A 500 kg satellite is in a circular orbit at an altitude of 500km above the Earth's surface. Because of air friction, the satellite eventually falls to the Earth's surface where it hits the ground with a speed of 2000 m/s. How much energy was transformed to internal energy...

[SOLVED] Density of a planet using orbit of a satellite Homework Statement A satellite is in a circular orbit about a planet of radius R. If the altitude of the satellite is h and its period is T, show that the density of the planet is \rho=\frac{3\pi}{GT^2}(1+\frac{h}{R})^3 The...

[SOLVED] Energy required to place a satellite in orbit Homework Statement A 200-kg satellite is placed in Earth orbit 200 km above the surface. What is the minimum energy necessary to place this satellite in orbit (assuming no air friction)? The Attempt at a Solution To solve this...

Satellite Motion / Universal Gravitation - This doesn't seem right... Homework Statement How far is a 1Kg / 10N wieght, from the Earth's surface, when it is 5N? Homework Equations g= GM/r^2 W=mg The Attempt at a Solution => W=mg => 5=1g g = 5 g= GM/r^2 =>5 =...

Homework Statement Synchronus communications satellites are placed in a circular orbit that is 3.59 x 107 m above the Earth's surface. What is the magnitude of the acceleration due to gravity at this distance? F=? G=6.67259 x 10-11 N*m2/kg2 ME (Mass of Earth)= 5.98 x 1024 kg r = 3.59 x107m...

QUESTION: Suppose we want a satellite to revolve around the Earth 5 times a day. What should the radius of its orbit be? (Neglect the presence of the moon.) WORK: Found the number of second in 24 hours and divided it by 5 to get the period. Then rearranged the gravitational equation...

Homework Statement A satellite is revolving round the Earth at a height of 600 Km. Find the speed of the satellite and the time period of the satellite, if the radius of the Earth is 6400 km, and mass of the Earth = 6*10^24 kg. Homework Equations The Attempt at a...

[SOLVED] satellite in low-eart orbit Homework Statement If a satellite is in a sufficiently low orbit, it will encounter air drag from the Earth's atmosphere. Since air drag does negative work (the force of air drag is directed opposite the motion), the mechanical energy will decrease. If E...

A revolving satellite is similar to a lift which is falling from a height. Only the difference is that the satellite has a very high horizontal velocity due to which the satellite moves forward while falling to earth. And when the Earth's curvature and the lift's downfall match, the satellite...

A remote-sensing satellite travels in a circular orbit at a constant speed of 8.2x10^3m/s. Determine the altitude above Earth's surface. I thought that I should do GMm/r^2 = mv^2/r and solve for r but if I do it that way i get a wrong answer. Instead, if I do mg = mv/r^2 and find r, I...

Hi Everyone... I really want to be able to calculate the RA/DEC of a Satellite from TLE data. For example, the International Space Station (ISS) Can anyone help to point me in the direction of where to find the claculations I need to perform this conversion from TLE data to RA/DEC? I...