Satellite Definition and 687 Threads

Homework Statement This question involves parts of other questions, so I will state the relevant parts and essentially what the question is asking. It is from Kibble Classical Mechanics, Chapter 4, Question 22. If more information is needed I will provide. We have a satellite that orbits the...

Homework Statement A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.53 hours. What is the density of the planet? Assume that the planet has a uniform density. Homework Equations T^2=(4pi^2r^3)/GM V=4/3piR^3 Density= Mass/...

Homework Statement (sorry for spelling of Earth, had to be to be done to fit it in lol) Does a satellite in orbit around the Earth speed up as it falls towards Earth? I understand why the satellite speeds up mathematically. If we equate the centripetal force equation and the equation for...

Homework Statement Homework Equations Force due to gravity ##\frac{GM_em}{r^2}## The Attempt at a Solution C) is incorrect as there would be no torque on the satellite about the center of Earth . I think B) is correct . But I am not entirely sure about the reasoning .Here is what I think...

Homework Statement A satellite is in a circular orbit of radius R from the planet's center of mass around a planet of mass M. The angular momentum of the satellite in its orbit is: I. directly proportional to R. II. directly proportional to the square root of R III. directly proportional to...

Homework Statement A spacecraft is protected from the Sun’s radiation by a planar baffle whose size is much greater than that of the spacecraft itself. The baffle is aligned perpendicular to the direction of the Sun. Show that the equilibrium temperature of the baffle is...

Homework Statement A radiometer system on a satellite orbiting the Earth at an altitude of 1000km has an antenna of gain 46 dBi pointing at the earth’s surface. The antenna is matched to a receiver with an input noise temperature of 50K and a bandwidth of 10MHz. The sky noise temperature is...

Homework Statement Compute the escape velocity for a projectile fired from the surface of the moon. The moon’s radius is 1700 km, and its surface gravity is ##1.62 m s^(−2)## . Neglect the effect of the Earth. A second projectile is fired horizontally from the lunar surface with a velocity f...

Greetings, I have a question asking which one of the following two takes more fuel: 1) Sending a satellite from its orbit around the Earth to the moon 2) Sending the same satellite from moon to its orbit around the earth I am really confused how to proceed in this situation. I think both...

Homework Statement A satellite with mass 848 kg is in a circular orbit with an orbital speed of 9640 m/s around the earth. What is the new orbital speed after friction from the earth’s upper atmosphere has done -7.50·109 J of work on the satellite? Does the speed increase or decrease? Homework...

Homework Statement Okay, so the question seems really simple so I don't know what I'm missing A satellite orbits at a fixed point above the Earth's equator. Assuming the Earth has uniform density, radius R, and angular frequency of rotation, omega Find an expression for eta, such that the...

Homework Statement A geostationary satellite is located at 0'N 0'E (degrees), 36000 km above a spherical Earth with radius R(earth) = 6370 km. To scan the fieldof view, the satellite rotates around its own axis(oriented parallel to the Earth's rotation axis). It records one (constant latitude)...

The problem is as follows. "NASA places communication satellites into Earth orbit with a radius of 42000 km. If the centripetal acceleration of one of the satellite is 0.22m/s^2, how long, in hours, will it take this satellite to make one complete orbit? For this chapter, these are the...

Homework Statement Calculate the height of a geo-stationary satellite of earth. Gravitational force of earth=6.667 x 10^-11 nm^2/kgm^2 Mass of earth=6x10^24 kgm Radius of earth=6400 km V=86400 Homework Equations GM/r=v^2 r=R+h The Attempt at a Solution I plugged everything into the equation...

***NOTE: The data in my written work & the typed variables under "all known data" are correct. The problem statement has new values for a new submission, but I am trying to correct my work on an old submission. Sorry for the confusion! 1. Homework Statement Problem: All known data: Period (T)...

I've been experimenting with aggregate stability of kite networks. ... Kite like to fly in networks. And I've written this about it.. https://drive.google.com/open?id=0B0qQxFlXu7t-RGpqRk1ZYXNISkU For the upcoming Airborne Wind Energy book. Today though... I want to know what thickness of bungee...

Hello,I’m looking for online webinars or video courses about satellite technology such as which parts does a satellite consist of or how to maintain its orbit, but by now I only found some webinars for end users from satellite service providers. Can anyone give me some suggestions?Senmeis

So, I have really no background in astrophysics (other than touching on some areas in general physics and calculus). I understand that asking questions such as the one in my title, that I would need to be more specific, and I will attempt to be as specific as I can. I understand that most...

Homework Statement Compute the speed and the period of a 240 kg satellite in an approximately circular orbit 610 km above the surface of Earth. The radius and mass of Earth are RE = 6400 km and ME = 6.0 × 1024 kg respectively. [5 marks] Suppose the satellite loses mechanical energy at the...

Homework Statement This is from an exam for my current course in "Mechanics 2", from a couple of years ago, which means that the correct answers are given for checking results, but without further explanations. I'm confused about part (c) where my results do not correspond with the given...

Homework Statement You have a geostationary satellite (location 0◦N 0◦E, 36000 km above geoid). Assume the Earth to be spherical with a radius of REarth = 6372km When observing a region centered at 60◦N 0◦E: What is the incidence angle of the satellite’s line of sight (at pixel center...

Homework Statement http://prntscr.com/9huihp Given, Mass of the Earth = 6*1024 Mass of Satellite = 45 kg Radius of Satellite's orbit = 4.2*107 G = 6.67*10-11 Find the velocity of the satellite. Homework Equations Gravitational Force Fg = (G*Me*Ms)/(Rs2) Newton's second law: Fg = Ms*a where a...

Homework Statement https://scontent-sea1-1.xx.fbcdn.net/hphotos-xft1/v/t35.0-12/12414351_10206719685063143_386848762_o.jpg?oh=16c004481b7417fad921c37acc4942be&oe=56793416 Homework Equations Angular momentum: H= Iw Parallel axis theorem: Io = I + Md^2 Moment of Inertia of thin plate about it's...

Hello, I had a bit of trouble figuring out this problem: 1. Homework Statement Given the following, determine the distance in miles above the Earth's surface of a geosynchronous satellite. MEarth=5.98E24 kg REarth=4,000 miles 1 mile=1604 m Homework Equations Fg=(Gm1m2)/r2 FC=(mv2)/r The...

Hey, how's it going! Just a little confused about how to do the problem below. Any help would be appreciated! 1. Homework Statement A satellite of mass m=100,000 kg is moving around the Earth in a circular orbit at an altitude of 100,000 feet above the surface. If the satellite were stopped and...

Homework Statement If two satellites A and B are orbiting the Earth out of which A is closer to the Earth then the total energy of which Earth plus satellite system is lesser?Homework EquationsThe Attempt at a Solution Should I consider only the magnitude while comparing using the formula total...

Two satellites A and B move around Earth in a circular orbit. The mass of B is twice the mass of A then I agree that kinetic energy of B is greater than that of A. But what I couldn't understand was that why are speeds of A and B equal as given in the book. Shouldn't they differ according to the...

If we provide a satellite with escape velocity perpendicular to the earth(radially), would it start orbiting it?

Gravity does act on a satellite so why is normal force 0 for an object placed inside it?

Homework Statement What is the time of an orbit of a satellite around the moon close to the moon's surface? What quantities do you have to look up to be able to answer this question? Radius of moon is 1736482 meters Homework Equations F = Gm1m2/r^2 and maybe F=mv^2/r 2pir The Attempt at a...

Homework Statement Question 1: A orbiting satellite stays over a certain spot on the equator of (rotating) Pluto. What is the altitude of the orbit (called a "synchronous orbit")? (The radius of Pluto is 1150 km.) Question 2:A orbiting satellite stays over a certain spot on the equator of...

Homework Statement Hi! I just found this forum after trying to calculate something regarding a satellite's orbit. Hope that you can help me here. So, I need to calculate the matrix of a satellite's site vectors. I have found it in the ECEF form, but since the satellite is doing observations in...

Why is the period of a satellite's orbit independent of its mass? I understand that its mass cancels out mathematically, but I don't understand it intuitively. The way I'm seeing this, if a satellite has a greater mass, it would have a greater pull on the body it is orbiting, and hence would...

A satellite is in a circular orbit a distance $h$ above the surface of the Earth with speed $v_0$. It suffers a head-on collision with some debris which reduces its speed to $kv_0$, where $k$ is a constant in the range $0<k<1$, but does not change its direction. Calculate the eccentricity of the...

Operational? Going to try use a handheld to find it this weekend.

Homework Statement Question: If a broadcast of a sporting event went up to a geostationary satellite, then traveled 50 000 km to another geostationary satellite, then came back to earth, what would be the delay in the signal? All electromagnetic waves travel at the speed of light, and most of...

I am a software engineering major, and I am having some trouble with an electric circuit in my satellite project. Basically I am trying to generate 1G on the inner surface of a cylinder with a radius of 0.03m, connected to an electric motor which has to rotate at about 173 rpm (to generate 1G...

Problem: In analogy to the Bohr Theory of the hydrogen atom, develop a quantum theory of Earth satellites, obtaining expressions for the orbit radius (r) and the energy (E) in terms of the quantum number (n) and the other relevant parameters. A satellite of mass 1000 kg is in a circular orbit of...

I got a little bit confused while studying gravitational potential energy, particularly the expression for long distances: (-GMm/r). An exercise asks me for the velocity, period and radial acceleration for a 1000kg satellite that I wish to put into orbit. That's okay. But after that, I'm...

Hi, I don't know if it's the right place for this question, but- I need to create a satellite model, that after being in space, will come close to the atmosphere, and then go back up again. In its way up it need to use a pulsed thruster. (This needs to happen multiple times...) Does a pulsed...

I am modelling the attitude dynamics of a satellite. The satellite has a reaction wheel in 1 plane to help control the attitude. There is significant debate about the equation for the net angular momentum of the satellite and what inertia tensors should be used regarding parallel axis theorems...

Hai PF, After a long time, I have again got a question now.The Mars rovers or other satellite body which is made of metal. My question is, when the rover or satellite land on the surface of Mars or moon does the metal experience any force on the body of the metal? Is there any...

I've been trying to figure out how to calculate if a satellite is in view of a ground station (and above a certain elevation) using just position vectors for both satellite and ground station. Does anyone know of an equation, algorithm, etc. that does this? Thanks

Hi all, I'm an student of Physics so apologies if I'm just some silly questions here. The higher frequency bands typically give access to wider bandwidths (e.g wifi). Considering that higher frequencies bands (> 30 Ghz) are more susceptible to signal degradation due to ‘rain fade’...

(b) (i) A satellite of mass 2520 kg is at a height of 1.39 × 107m above the surface of the Earth. Calculate the gravitational force of the Earth attracting the satellite. Give your answer to an appropriate number of significant figures. Worked out to be F = 2.45 x 103 The satellite in part...

Hi there, Maybe this is a stupid question. Maybe not. I want to make a statement in my thesis that says that all radar antennas on satellites derive the EM field by: receiving the time-varying H field, and from the induced current derive the EM field. Am I correct in saying that? Or are there...

Homework Statement The metric near Earth is ##ds^2 = -c^2 \left(1-\frac{2GM}{rc^2} \right)dt^2 + \left(1+\frac{2GM}{rc^2} \right)\left( dx^2+dy^2+dz^2\right)##. (a) Find all non-zero christoffel symbols for this metric. (b) Find satellite's period. (c) Why does ##R^i_{0j0} \simeq \partial_j...

Homework Statement A satellite of the Earth has a mass of 1550 kg. It orbits Earth with a mean radius of orbit of 7.00 x 10^6 m. a) What is the gravitational potential energy of the satellite with respect to Earth? b) What is the kinetic energy and the velocity of the satellite in Earth’s...

So for an online quiz, I am stuck on this question: The oldest artificial satellite still in orbit is Vanguard I, launched March 3, 1958. Its mass is 1.60 kg. Neglecting atmospheric drag, the satellite would still be in its initial orbit, with a minimum distance from the center of the Earth of...

Hello, First time poster in this forum. I am tasked with simulating small satellite dynamics in software this summer. I am new to this and am wondering how such a simulation is carried out. More specifically I am supposed to output the vector [ x y z xdot ydot zdot q1 q2 q3 q4 w1dot...