Satellite Definition and 687 Threads

I need to convert quaternion (q) to a form that is suitable to show changing attitude of a Satellite. like new x,y,z vectors of a satellite.I don't know the math of quaternions. I am getting updated state using rung -kutta 4 method where state vector x=[q(1:4) wx wy wz a(1:3) b(1:3)].I can...

I am working on sun Earth attitude determination simulation for my satellite in MATLAB using SCT(space craft control toolbox)I have my keplerian elements for my satellite.I have some initial conditions for orbit setting or satellite is known.I need to use RK4 method for quaternion/state...

Homework Statement Find Hamiltons canonical equations for a satellite of mass m moving about a star of mass M at the origin. Consider motion in a plane, using polar coordinates r,\theta. Repeat the process using cartesian coordinates x,y from the start. Homework Equations H=T+V...

Homework Statement Homework Equations g=GMm/r^2 e=c/a g=v^2/r The Attempt at a Solution a) v^2/r=GM/r^2 m<<M v^2=GM/r v=SGRT(GM/r) I don't think this is valid though since the orbit is not circular. I don't know how to alter the equation so it also applies to...

Homework Statement A satellite has a mass of 4000 kg, a radius of 4.9 m. 4 rockets tangentially mounted each add a mass of 220 kg, what is the required steady force of each rocket if the satellite is to reach 31 rpm in 5.1 min, starting from rest? Homework Equations \SigmaT=I...

Homework Statement A communications satellite with a mass of 450 kg is in a circular orbit about the Earth. The radius of the orbit is 2.9×104 km as measured from the center of the Earth. A. Calculate the weight of the satellite on the surface of the Earth. B. Calculate the gravitational force...

Let me put the facts first: - A students team from my college is building a satellite, under guidance from professors and research institutes. The students belong to the Indian Institute of Technology, Madras and the professors/mentors/contribtors are from varied institutions like IIT-M...

Homework Statement A orbiting satellite stays over a certain spot on the equator of (rotating) Mercury. What is the altitude of the orbit (called a "synchronous orbit")? Mercury mass = 3.3022 e23 kg Mercury Radius = 2439.7 km Homework Equations T^2 = (4\Pi^2/GM) * r^3 and that's...

Homework Statement A satellite moves around the Earth in a circular orbit of radius r. a) What is the speed vo of the satellite? Suddenly an explosion breaks the satellite into two pieces, with masses m and 4m. Immediately after the explosion the smaller piece of mass m is stationary with...

Torque acting on Satellite, why isn't omega increasing? Hey guys, HW help problem here, we have a satellite rotating at some constant angular rate, and we are asked to calculate the torque required to maintain said motion. I am able to do this, given the principal Moments of Inertia for the...

Homework Statement Find the radius R of the orbit of a geosynchronous satellite that circles the earth. (Note that R is measured from the center of the earth, not the surface.) Homework Equations These are what I would assume this equation is going to use. F = GmM/r2 F = mv2/r gravitational...

Homework Statement Imagine you are sent in a satellite. a) How far above the surface of the Earth would you lose 1/2 of your weight? b) To maintain the satellite orbiting around the Earth at that distance, what will be the velocity of the satellite? c) Imagine you have taken a weighing...

Homework Statement A low-altitude satellite near the Earth's surface has a speed of 7.90 km s-1. The radius of the Earth is about 4 times that of the moon and the ratio of the average density of the Earth to that of the moon is about 5:4. The speed of a low-altitde satellite near the moon's...

Homework Statement A satellite circles planet X once every 99 min at a mean altitude of 530km. Calculate the mass of the Planet, if its radius is 5.78 * 10^6 So this is the Question i am having trouble with, these gravity questions are really killing me. Homework Equations...

Homework Statement A 5.00x10^3kg is orbiting the Earth in a circular path. The height of the satellite above the Earth is 8.00x10^2km what is the magnitude of the angular velociy? Mass of earth: 5.98x10^24kg radius of Earth plus satellite:6380800m G:6.674x10^-11 Homework Equations...

The center of mass between two equally sized planets would be right in the center. When you find the center of mass between the Earth and a satellite how would I find the distance offset from the hypothetical midpoint of the earth? The Earth contributes more to the center of mass when paired...

Homework Statement see attachment #12.106 Homework Equations V=R\sqrt{}(g/r) (for a circular orbit) where R is the radius of the Earth and r is the radius of the orbit from the center of the earth conservation of momentum for elliptical orbits: Vara=Vbrb The Attempt at a Solution...

Just realized how horrible the thread title is. Sorry, I meant the radius of a satellite's *orbit* Homework Statement Two satellites revolve around the Earth. Satellite A has mass m and has an orbit of radius r. Satellite B has mass 6m and an orbit of unknown radius rb. The forces of...

1. {This paradox denotes the fact that a satellite in a near circular orbit suffers an increase in velocity when subject to a drag force.} The Specific energy of the satellite is K + U = E where K =v^2/2 is specific kinetic energy. U= -u/r is specific energy and E is specific total energy. If...

Hi, I've been looking at some example solution and still haven't found the physical/mathematical explanation for the given solution. Problem: Due to slow satellite stabilization rotation there are big differences between maximums and minimums of received signals. Calculate the power...

I've read that if a satellite is in low orbit around the Earth, the increased friction due to the atmosphere causing the satellite to slow down and finally fall back to Earth. What if a large celestial body such as the moon is slowed down by some means? Will it eventually fall to Earth? I...

Hi, first time posting here. I'm working on satellite orbit determination and wish to add in perturbing accelearations in addition to the Earth's graviatational field. I will be adding in acceleration due to the moon, sun, atmospheric drag, etc... The acceleration due to the Earth's...

This is nothing so involved as the actual mechanics of orbit. I'm just curious, is there a preferred plane that satellites orbit in? I ask because on my frequent stargazings, after my eyes are VERY well adjusted to the dark, I can see what I assume to be satellites moving pretty quickly across...

This isn't quite a question, I've got an exam coming up and I'm compiling a notes sheet I've found gravity and satellites troubling, I know most of the general equations, but I was wondering if I could get a set of equations which have been modified to find each measure... So far I've got...

Homework Statement A satellite is fitted with a station keeping rocket capable of producing thrust of 500N. Its speed is 500Km/hr. Mission control wishes to increase the radius of orbit by a factor of 0.5. For how long should the rocket be fired to achieve this? (The weight of the satellite...

Last April is an interesting month. The http://www.ncdc.noaa.gov/oa/climate/research/2009/apr/global.html#temp" ranks last April as the fifth warmest on record. The lower troposphere (<8 kilometers) however is ranked eleventh by RSS and fifteenth by UAH. Why the large discrepancy? Should we...

Homework Statement A satellite that has a mass of 300 kg moves in a circular orbit 5.00 X 107 m above Earth's surface. (a) What is the gravitational force on the satellite? (b) What is the speed of the satellite? (c) What is the period of the satellite? Homework Equations Fg=...

I have read that an object needs to have a velocity of around 8km/s to not fall back on Earth and to stay on orbit. Based on the above, are all our human made sattelites constantly traveling at around 8km/s to not fall back on earth? Is so doen't it need a lot of fuel? Does it store all this...

Homework Statement a satellite of mass 200 kg is launched from a site on Earth's equator into an orbit 200 km above the surface of earth. a) assuming a circular orbit , what is the orbital period of this satellite? b)what is the satellite's speed in it's orbit? c) what is the minimum energy...

Homework Statement A satellite of mass m is in a circular orbit of radius R_2 around a spherical planet of radius R_1 made of a material with density rho. ( R_2 is measured from the center of the planet, not its surface.) Use G for the universal gravitational constant. Find the kinetic...

Does anyone know the fate of North Korean satellite just launched today?

http://www.nytimes.com/2009/04/04/world/asia/04korea.html

Hi all, Is that possible that a stationary satellite be fixed to a location far from equator?

Homework Statement A remote-sensing satellite travels in a circular orbit at a constant speed of 8.2 x 10^3 m/s. Determing the altitude in kilometres of the satellite above Earth's surface. Homework Equations Fc = FG The Attempt at a Solution mv^2/r = GMm/r^2 v^2 = GM/r r =...

I want to watch TV on my computer because it is more convenient than watching in my living room. I have been looking at TV Tuners for a while and recently found an article (over 2 years old) on i-hacked.com (http://www.i-hacked.com/content/view/244/1/" ). Should I buy card off of ebay like...

I have a question regarding programming of artificial satellites if someone would be nice to answer. :) Well I'm assuming that satellites need to be programmed to function (according to the clients' wishes). I have a few questions regarding this: 1. In what kind of programming languages are...

I am doing a problem with calculating orbits. The orbit can be expressed in polar coordinates as r=p/(1-ecos(theta)) where r and theta are the distance and angle of the satellite from the center of the earth, p is a paremter where p=1200 km, and e is a parameter representing eccentricity. I'm...

Homework Statement A satellite is in an elliptical orbit at altitudes ranging from 230 to 890 km. At the high point it's moving at 7.23 km/s. How fast is it moving at the low point? I would think i would have to use some sort of energy conservation equations. but i really don't know where...

Can you find the orbital velocity of a planet which a satellite has to obtain in order to revolve around the planet with this formula: v = \sqrt{\frac{Gm_E}{r_E}} G = gravitational constant 6.67*10-11 mE = Mass of a planet rE = the radius of the orbit rE = h + r h = height of the...

Ouch, $289 million. I wonder why it malfunctioned? http://news.yahoo.com/s/ap/20090224/ap_on_sc/sci_carbon_satellite

Distance of a satellite from earth... Homework Statement A microwave signal is received from a satellite in orbit round earth, 68 ms after it was transmitted from the satellite. Calculate the height of the satellite? This sounds like such a simple questions and i reckon it is except i...

Homework Statement You will need to use the Momentum Principle to do the first part of this problem, and the Energy Principle to do the second part. A satellite of mass 6000 kg orbits the Earth in a circular orbit of radius of 7.4 106 m (this is above the Earth's atmosphere).The mass of...

Homework Statement A satellite of mass 4500 kg orbits the Earth in a circular orbit of radius of 7.6 x 10^6 m (this is above the Earth's atmosphere).The mass of the Earth is 6.0 x 10^24 kg. What is the speed of the satellite? What is the minimum amount of energy required to move the...

1. Homework Statement This is an question from (NZ) NCEA Scholarship Physics practise paper. Calculate the height of geostationary satellite and hence calculate the lattidue of a satellite dish that must be placed vertical to point at it. 2. Homework Equations Earth's rotational velocity =...

Homework Statement What is the Kinetic energy of a 180-kg satellite which circles the Earth (radius=6.4x10^6m, mass=6.0x10^24kg) with a period of 8.0 h? a)2.2x10^9J b)2.0x10^9J c)1.8x10^9J d)2.4x10^9J e)3.6x10^9J Homework Equations Ep= GM1M2/r Ek=.5Mv^2 Ac=(4\pi^2r)/T^2...

hi every one I have tow quation about satellite, I have been searchinh for long time but I have not get the answer first. how can the satellite re-track to its orbit if it drifts? second what will the speed become if the satellite drifts to the east or west some distance. I mean the...

http://mersenneforum.org/showthread.php?p=162630#post162630 Your views welcome. David

Can someone help me.. A satellite of mass 100kg revolves round the Earth in a circular orbit of radius 2R where R is the radius of the Earth. Determine the energy needed to move the satellite to a new orbit of radius 3R. Thanks alot.

I have a problem with the pointing device or any external mouse connected to my Toshiba Satellite A300 - 15M. I use windows vista. When I just move the cursor above any icon, it selects it as if I clicked on it! and if I clicked the icon once, it opens as if I double clicked it! Also when the...

Pardon me for my ignorance -- and naivety, if this question idicates it -- but would it be possible to change the rotation of a planet or moon? We'll assume the hypothetical people attempting this project have a nearly infinite budget, but even with quadrillions of dollars, is this even...