Satellite Definition and 671 Threads

The workshop starts tomorrow. Should be very interesting. http://www.physics.ntua.gr/corfu2010/nc.html The programme is online http://www.physics.ntua.gr/corfu2010/Program/4thSession.pdf M. Reuter and M. Henneaux will talk about "Running Immirzi Parameter and Asymptotic Safety"...

I am trying to determine a wire to use as a resistance heater. I want to adhere this wire to the rear of my satelitte dish with aluminum foil tape. I am in the process of designing a temperature and humidity controller to cycle the heaters on and off. I know that I need the heater to produce...

I recently installed a router for Dish Satellite and it seems to have caused a failure to telephone lines. The DSL line stills works I have outside phone connection from the telephone connection point but no phones work on the inside of the house. I am using a hand telephone that is working. I...

Homework Statement Does the centripetal force equal the gravitational force? Homework Equations Fg = G(m1)(m2) / r^2 Fc = 4(pi^2)(m)(r) / T^2 The Attempt at a Solution I have the mass of a satellite in geosynchronous Earth orbit. The period of Earth's orbit, and the Earth's radius and...

Hey all, im doing a individual info search on GPS. i can understand everything (well its just a basic overview of GPS) but the one thing i can't get my head around is why the need for a fourth satellite? i know it corrects the timing as the receiver does not have an atomic clock. I've read 4 or...

A satellite is placed in a noncircular orbit about the Earth. The farthest point of its orbit (apogee) is 3.6 Earth radii from the center of the Earth, while its nearest point (perigee) is 2.7 Earth radii from the Earth's center. If we define the gravitational potential energy U to be zero for...

Hey everyone: I have the following problem: as the title suggests I need to be able to move my satellite receiver to any geostationary satellite orbiting. I want to use a unipolar stepper motor and either half step, or I might Microstep the motor to get more accuracy. I am looking to operate it...

Homework Statement Given: Bit rate = C = 9600 bits/second Channel Bandwidth = B = 10 MHz Find Tx for satellite side and ground side Homework Equations Shannon's equation: C = B*log {1+(S/N)} (log is to the base 2) The Attempt at a Solution Well this is how I decided to approach the...

Homework Statement A satellite is orbiting above the earth. By what factor must the orbital radius be changed in order to double the period of the orbit? (Mearth = 5.98 x 1024kg, Rearth = 6.36x106m) The Attempt at a Solution i got 1.59 by T1/T2=(r1/r2)^3/2 so r1/r2=(T1/T2) ^2/3 so 2^2/3...

Been sick for a bit so missed a fair bit of "advanced" maths including locuses, particularly parabolas, but what's worrying me more at the moment is dynamics. So got a moderately difficult question here to help catch me up. I don't really comprehend any of the rules and this question is tricky...

Let’s assume a satellites orbit a area with resistance against motion, for example 1E-10m^2 If that motion would be straight an object would deceleration, but a satellite would instead (in its accelerating period) continue to accelerate, also even it had such speed lost. On the one had...

Homework Statement the gravitational force exerted on a body of mass m by the Earth is GmM / r2 1. Express the speed of an artificial satellite which carries out uniform circular motion at height R from the surface of the Earth in terms of g and R 2. express the mechanical energy of the...

Homework Statement A satellite is designed to orbit Earth at an altitude above its surface that will place it in a gravitational field with a strength of 4.5 N/kg. a) Calculate the distance above the surface of Earth at which the satellite must orbit. b)Assuming the orbit is circular...

Homework Statement A satellite with a mass of 5.00 x 10^2kg is in a circular orbit, whose radius is 2r_e, around earth. Then it is moved to a circular orbit with a radius of 3r_e. a) Determine the satellite's gravitational potential energy from the first orbit to the second orbit. b)...

Homework Statement I have uploaded the question. See attachment "question001"Homework Equations L=mvR for circular orbit The Attempt at a Solution See attachment "answer001". The problem is that my final answer seems to be imaginary, and I have tried to look for mistakes in my algebra which...

Homework Statement A satellite in a circular orbit around the Earth with a radius 1.019 times the mean radius of the Earth is hit by an incoming meteorite. A large 73-kg fragment is ejected in the backwards direction so that it is stationary with respect to the Earth and falls directly to the...

Homework Statement Ok so I'm told that there is a satellite mass m in a circular orbit of radius ro around the Earth (of mass M). I'm told the speed of the satellite is vo. So I've shown that Eo = total energy of satellite = -1/2mvo^2 Now I am told that whilst the satellite is in its...

Homework Statement i) Show that when a satellite (or planet) is in a circular orbit it's kinetic energy (positive) is one-half of it's potential energy (negative). ii) Show that in order to escape from the Earth you need a speed v=sqrt(2gR) where g=9.8 m/s^2. Neglect Friction and effects of...

More goodies from NASA. This time around they've been able to capture some remarkable high-resolution photos of the Sun. They also got footage of the Solar Prominence Eruption on March 30, 2010. http://edition.cnn.com/2010/US/04/21/solar.observatory.images/

I don`t understand the solution for the following question: A satellite is in orbit around the earth. Consider the following quantities: 1. distance from the center of the earth 2. mass of the earth 3. mass of the satellite The gravitational acceleration g depends on which of the above...

Homework Statement A satellite is orbiting the Earth in a stable orbit of which the radius is twice that of the Earth. Find the ratio of the satellites cepripetal acceleration to g on the Earth's surface. Homework Equations centripetal acceleration = (v^2)/r or (4rpi^2)/T^2 The...

I have a satellite orbit problem I'm not quite understanding...any help would be appreciated. Homework Statement Suppose a spacecraft orbits the moon in a very low, circular orbit, just a few hundred meters above the lunar surface. The moon has a diameter of 3500 km, and the free-fall...

Homework Statement The Earth's orbit is of mean radius 1.50*10^{11}m and the Earth's year is 365 days long. The mean radius of orbit of Mercury is 5.79*10^{10}m. Calculate the length of Mercury's year. Homework Equations F=\frac{mv^{2}}{r} F=\frac{Gm_{1}m_{2}}{r^{2}} d=v \cdot tThe Attempt...

Homework Statement If a satellite was traveling away from Earth at a constant rate of acceleration, starting at 20% speed of light, and increasing by 2% speed of light per hour until it reached 90% speed of light, sending temperature data back at intervals of one second, how would it be...

hi all look i haven't finished the control I subject ..and the Dr ask us for a project. i've got an idea i want to design and satlight with two motor if anyone can help me with the basic i would be greatfull if there any site can explain that ..please i need it

NASA wants to fire a satellite into a circular orbit around Mars that will maintain 'station' above the Martian equator. what is the distance from the surface of mars? ok first of all does the term 'station' refer to when g = 0? and the equation I've used is: Fc = Fg mv²/r = GMm/r²...

[b]1. A satellite has an orbital speed of 4.2 x 10^3 m/s. What is its altitude above Earth's surface? mass of earth= 5.98x10^24kg radius of Earth = 6.38x10^6m [b]2. acceleration and force are both centripetal a=(v^2)/r F=ma possibly v^2=(Gmg)/r [b]3. Need help with algebra h=...

I am doing satellite attitude determination simulation using sun Earth sensors and Gyro modelling .I am using extended kalman filtering for attitude determination. the sequence of operations I am doing are % Simulation data % Spacecraft data % Gyro data % Sensor data. % Control system...

hi every body ..hop u are diong well in this smsiter i am taking a control subject ,,and there project is required from us .. i have an idea ..and that's is the head of the topic ,,little satellite ... wat in mind now that i must get two motors and have to design the circuit to...

Homework Statement Determine the time it takes for a satellite to orbit the Earth in a circular "near-Earth" orbit. The definition of "near-Earth" orbit is one which is at a height above the surface of the Earth which is small compared to the radius of the Earth, so that you may take the...

Homework Statement An orbiting satellite stays over a certain spot on the equator of (rotating) Pluto. What is the altitude (in km) of the orbit (called a "synchronous orbit")? Homework Equations r = [(G*M*T^2)/4pi^2]^(1/3) h= r-radius of pluto The Attempt at a Solution I have...

I have a Question: suppose we have a satellite (m=400kg, V[SIZE="1"]0=40m/s) and we want to put it in a 1000km orbit (r=1000km)...what should be the launch angle? P.S: is this question complete?[SIZE="1"](For Lack Of A Better Word) .. I mean do we have a formula which relates these...

Hi there... I have a question regarding satellite. If I am posting in the wrong place, I'm very sorry (in advance :blushing:) Here's my question. Why is a satellite dish for TV (think Dish Network) so much bigger than one for satellite radio? Sure would be more attractive to have a teeny...

Homework Statement It is required to put a satellite into an orbit with apogee of 5R/2, where R is the radius of the planet. The satellite is to be launched from the surface with a speed Vo at 30degrees to the local vertical. If M is the mass of the planet, show that (Vo)^2 = 5GM/4R. Assume...

Homework Statement Calculate the total energy of a geosynchronous satellite (one that orbits over a fixed spot) with a mass of 1500kg, orbiting Earth at a height of 325km with an orbital speed of 5000m/s Homework Equations Et= Ek-Ep Et= -1/2(GMem)/r The Attempt at a Solution im...

Homework Statement I have to find the orbital height of a satellite with a specific g force (ie. the acceleration due to gravity). g=5.7(ms)2 Homework Equations So far I have been using the equation g=Gm/(r+h)2 to find the acceleration due to gravity, where G= gravitational...

Hi, so I got stuck on this problem and I really don't know what it is that I'm not doing right, so if you can please help me. Thank you Homework Statement A satellite is in a circular orbit 11000 km above the Earth’s surface; i.e., it moves on a circular path under the influence of...

Homework Statement If an orbiting satellite has a total energy of -1.4 x 1012 J, then the binding energy is... b. 1.4 x 1012 J Homework Equations Eg = (-GMm)/r Binding energy = (GMm)/2r The Attempt at a Solution I was just wondering why the answer is 1.4 x 1012 J. Thanks

Homework Statement A satellite falls freely towards the Earth starting from rest at distance R, much larger than the Earth's radius.Treating the Earth as a point mass M then T=C(R^3/GM)^0.5 where G is gravitational constant By...

Homework Statement A 600kg satellite moving in a stable circular orbit about the Earth at a height of 4000km (G=6.67x10^-11 NM^2/kg^2, Re=6380km, Me=5.98x10^24kg). Calculate the speed of the satellite at that height. Calculate the orbital period (T), the time for one revolution Calculate...

Hello :) Does an artificial satellite rotate in its own axis? tia

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.) You may use the following constants: * The universal gravitational constant G is 6.67 \times 10^{-11}\;{\rm N \...

HELP! very urgent! satellite problem. A 400 kg satellite is going to collide with a smaller 100 kg satellite traveling in the same orbit but in the opposite direction. Knowing the construction of the two satellites you expect they will become enmeshed into a single piece of space junk...

Wow, wow, and wow! I was looking at this: http://ciclops.org//view_media.php?id=18185" and was amazed my the funky striations or flow patterns or whatever they are called. How is it that the marks become curved and square shaped? I love these photos!

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...