Satellite Definition and 687 Threads

Homework Statement Calculate the total energy of a geosynchronous satellite (one that orbits over a fixed spot) with a mass of 1.5 x 10^3 kg, orbiting Earth st a height of 325 km with an orbital speed of 5.0 x 10^3 m/s. Homework Equations Ek = 1/2 mv^2 Ep = mgh Fg = Gm1m2/r^2 or PE...

Homework Statement A 500 kg satellite experiences a gravitational force of 3000N while moving in a circular orbit around the Earth. Find the radius of the orbit Homework Equations FG=GM1M2/r2 g=GME/r2 Mass of Earth= 5.98x1024 Kg Radius of Earth= 6.38x106 m The Attempt at a...

In our Solar System, what is the best example of a planetary moon having its own satellite? What general properties do such satellites share?

Homework Statement An axis-symmetric satellite is freely spinning in the space. The moments of inertia and the angular velocity at t=0 are as follows: Ix=200kgm2 Iy=Iz=100kgm2 wx=10rad/sec wy=1rad/sec wz=0 (a) Calculate the angular momentum of the satellite (b) What is the nutation...

I'm really confused I have learned at school that the satellite remains in it's orbit because it's in an equilibrium state due to Centripetal force and the gravitational force but how? Doesn't the centripetal force and the the gravitational force both of them act toward the the earth? And what...

Homework Statement a 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth. a) Find the radius of the circular orbit b)Find the Speed of the Satellite c) Find the period of the orbit Homework Equations g=GM1M2/r2 Fc=Mv2/r...

Reference: Forbes - NASA Satellite May Have Found The Smallest Known Black Hole The State Column - NASA’s RXTE reveals secrets of tiny black hole

Hey folks wondering if anyone knows some good books on the following subjects... Orbital transfers, specifically to Lagrange points with information on stable/unstable manifolds. Control theory of satellites, new to control theory so perhaps I should be looking at a general control theory...

Homework Statement A satellite in geostationary orbit is used to transmit data via electromagnetic radiation. The satellite is at a height of 35,000 km above the surface of the earth, and we assume it has an isotropic power output of 1 kW (although, in practice, satellite antennas transmit...

Homework Statement How much energy is required to move this satellite to a circular orbit with a radius of 2.50×104 miles? I've found the answer to Part A of this problem to be 1.59*10^10, if this helps solve the above^^ (Find the kinetic energy of a 1.80×103 kg satellite in a circular...

Homework Statement A 92-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.14 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. What...

1. A television satellite is in circular orbit about the Earth, with a sidereal period of exactly 24h. What is the distance from the Earths surface? 2. I think I have to use Kepler's Laws. Confused as to how to do it without the mass of each. I guess I could find out the mass of the...

Homework Statement Im trying to figure out how to calculate how much a satellite in an elliptical orbit travels around in a day. The satellite is in a 12 day orbit with Earth focused at (3,0). The equation i have for the ellipse is 16x^2 +25y^2 = 400. Other relevant information i have is the...

Homework Statement Suppose that Captain Omega of the Imperial Space Patrol wishes to place a spy satellite in geosynchronous orbit above the mysterious Planet X, which has a mass of 5.90 x1024 kg, and a rotational period of 26.4 hours. (a) What should be the radius of the satellite's orbit...

There is a story doing round in e-mails and FB recently. The story is this: A satellite sent by Nasa, while going round the globe, slows down automatically when it crosses a particular spot over the Saneeswarar temple (a Hindu temple dedicated for Saturn), in Thirunallar, Tamil nadu, India...

Homework Statement How far above the surface of the moon should a satellite be placed so that it is stationary with respect tot the moons surface. Radius of moon = 1737.4 kilometers mass of moon = 7.36 x 10^22 kilograms Gravitational Constant = 6.67 x 10^ -11 N x m^2/kg6@ Homework...

Hi I am trying to build a satellite tracker for fun, to get information out of the cube sat projects or any satellite I can track. I was wondering if there was any open source java scripts for an arduino controller that would take and input for azimuth and elevation and output for two stepper...

Hi, I'd like to know how it's possible to calculate the altitude of a satellite using some kind sensor. I know that near-space(28~30km) you can still read a very low pressure so I can calculate the altitude using pressure. But and after this? I read that you can use gravity so, can I use...

Homework Statement A small, perfectly black, spherical satellite is in orbit around the Earth. If the Earth radiates as a black body at an equivalent blackbody temperature T_{E} = 255 K, calculate the radiative equilibrium temperature of the satellite when it is in the Earth’s shadow. Start by...

Don't know whether this belongs in chemistry or Earth science but there has been discussion about salinity here. http://www.bbc.co.uk/news/science-environment-15033532

As most of you know the UARS satellite is returning to Earth this weekend...ooops! And apparently the trajectory is right over Evo's house. :rolleyes: :bugeye...

Scientists want to place a 2500 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.8 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars = 6.4191 x 1023 kg rmars = 3.397 x 106...

Homework Statement An Earth satellite is moving in the plane of the Earth's equator. Satellite is 1680km above Earth's surface, with a period of 2 hours. Determine the angle through which satellite is visible to an observer at an equator, measured about the centre of the Earth.Homework...

so NASA's saying a satellite's going to come crashing down in a few weeks http://www.telegraph.co.uk/science/space/8751605/Nasa-warns-of-fresh-risk-from-468m-satellite-falling-from-space.html "Scientists estimate the debris footprint will be about 500 miles long with a 1-in-3,200 chance...

Homework Statement An Earth satellite moves in a circular orbit 605 km above the Earth's surface. The period of the motion is 96.6 min. What is the speed of the satellite? Homework Equations The Attempt at a Solution First, I know that it is orbiting 605 km above Earth's...

I have been toying with a java programming project for a few months now. I want to depict a satelite orbiting a planet (2 dimensional). I've scaled down certain constants to fit the screen and have put GM (mu) at 200000 and the distance from the gravitaional body, a planet, at 200...

Homework Statement A satellite is orbiting Earth 4200 km from Earth's surface. Considering the trajectory to be a circle, calculate the period of the orbiting satellite. Homework Equations a=v2/r F=GmM/r2 c=2r*PI v=l/t The Attempt at a Solution Well, the textbook gives the...

I have a question that says the velocity of an orbiting satellite is 28620 km/hr. Calculate the height in km of the orbit above the Earth's surface. Gravity is 9.81, and Earth's radius is 6370000. What formulas do I need and how do I work out the height?

Homework Statement An Earth satellite is to be put into orbit at a height of 2 Mm above the Earth's surface. Determine the velocity it must have. Make the following assumptions: (a) the orbit is circular; (b) the Earth is a sphere of radius 6•37 Mm; (c) gravity decreases as an inverse...

Homework Statement If a satellite in orbit changes it's orbiting radius to 4 times its initial one, how does it's velocity change? I get different answers by using Newton's Law of gravitation and conservation of angular momentum. Homework Equations F = \frac{G M m}{R^2} a_c =...

a 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth. a: find the radius of the circular orbit b: find the speed of the satellite c: find the period of the orbit attempt a: g= GM/r^2 r=sqrt(GM/g) r= 3.33 x 10^-6 m am i...

Homework Statement What is the work done to place a satellite of mass 600kg which orbits the Earth at a radius of 8.00 x 10^6 m. The Attempt at a Solution 1st attempt : W= F x d = GmM/(r^2) x r = GmM/r where r is the radius of the satellite The answer I got is 3 x 10^10 J which is...

Homework Statement The question wants us to determine what the power output of a 2.32 GHz geosynchronous satellite that has an antenna gain of 18 dB be for a mobile receiver that is operating with an effective antenna gain of 3 dB in order to achieve the FM threshold (6 dB).Homework Equations...

Hi everyone, I'm not sure if this is the right section to post this in, but the question doesn't really seem to fit any singular category, so I'll try this one (if someone has a better recommendation, please let me know!) The question I'm seeking to answer is this: A baseband signal of...

Homework Statement A satellite is in orbit just above the surface of a spherical planet which has the same radius as Earth and the same acceleration of free fall at it's surface. Calculate: i) Speed ii) Time for 1 complete orbit. Radius of Earth = 6400km or 6400000m and accel. of free...

Homework Statement A satellite traveling in circular obit about the equator of the Earth in the opposite direction of the rotation of the earth. It passes over a position of the Earth every 12 hours. What is the velocity and altitude of the satellite? Homework Equations G (universal...

Question: A 460kg satellite is launched into a circular orbit and attains an orbital altitude of 850km above Earth's surface. Calculate the: e) additional energy and speed required for the satellite to escape. Attempt: I found Ek to be 1.27*10^10 J Thus, the total energy is...

Homework Statement a satellite of mass 100kg travels in a circular orbit around the earth, how much energy is required to move it to an altitude of 400km? Homework Equations Ek=1/2*mv2 U= -G(m1m2)/r The Attempt at a Solution i took the satellite as the system, so as it moves to...

Homework Statement The average speed of an orbiting space shuttle is 19800 mi/h. The shuttle is orbiting about 233 mi above the Earth’s surface. Assume the Earth’s radius is 3963 mi. How long does it take to circle the earth? Answer in units of h. Homework Equations I think it...

when a meteor hits a satellite what will happen to its motion

Why does a satellite burns if it falls from orbit to atmosphere? BUT not when it is launched ffrom surface to orbit, ALTHOGH they pass through the same atmosphere

Homework Statement by using Newtons law of universal gravitaion and the relationship for the centripetal force, show that the orbital period T for a satellite circling a planet of mass M in orbit of radius r is given by : T= 2pi sqrt r^3/GM Homework Equations none given The...

I am just tired of watching tv on my living room. I know it might need a tv tuner card to hook up the satellite TV.but my problem is how? one of my friend said TBS 6981 dual tuner is good. anyone has used it before? Any advice will be appreciated

Homework Statement A satellite is in orbit around a planet with orbital speed determined to be 7080 m/s. Find the escape velocity from the planet from this position of its orbit. Homework Equations EV=sqrt(2GM/r) The Attempt at a Solution With a problem like this, I would just...

The question is... A satellite is in a circular orbit about the Earth (M = 5.98 x 1024 kg). The period of the satellite is 6.72 x 104 s. What is the speed at which the satellite travels? I know the speed is equal to (2piR)/6.72x10^4s But I can't figure out the radius. I know the Earth's...

This is my first question here, so I'm a little new at this. I've really learned a lot from this forum in the past. Here goes: 1. Suppose you are responsible for a no-engine rocket project which carries a new satellite into space a. What is the the minimum initial speed of the rocket to...

One of the proposals for harnessing solar energy is to put solar panels in space. Either orbiting the Earth, or stationed on the moon, light waves could be converted into microwaves that pass through the atmosphere without losing any energy, then on to electricity on the ground. What I'm...

Homework Statement The Attempt at a Solution as w is same as w of Earth ... so T is 24 hrs so its like a geostationary satellite if i use w to find distance ... it comes like 42300 KM if we used t=24 hrs to find distance ... it comes 36000 KM what the hell is this? ... 1...

[b]1. Homework Statement : An artificial satellite revolves about the Earth at height H above the surface. If the radius of the Earth is R, calculate the orbital speed and the orbital period such that a person in the satellite will be weightless. Homework Equations The Attempt at a...

Homework Statement Find the velocity of a satellite which circles the Earth at a distance R from the Earth's centre. Homework Equations Fc = (m*v^2)/r W = mg The Attempt at a Solution I put Fc = W (I think I can do that?) so (v^2)/R = g v = sqrt(10R) I'm not sure if my answer is right or if...