Satellite Definition and 671 Threads

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...

Homework Statement If height of a satellite from the surface of Earth is increased, why does the total energy increase? Homework Equations T.E=K.E + P.E The Attempt at a Solution Here the work done by non-conservative forces is zero. This means that the total mechanical energy of the system...

Homework Statement A satellite is in a circular equatorial orbit around the Earth (over the equator). If the satellite flies over Singapore 9 times a day, what is the radius of the orbit? Homework Equations r3 = T2GME/4π2 The Attempt at a Solution G = 6.67x10-11 ME = 5.97x1024 T =...

Namaste If escape velocity on Earth is 11 km/s and velocity of Earth is 30 km/s how is that the atmosphere doesn't escape the pull of earth. Is the escape velocity with reference to Earth ? I don't think so because when finding the formula we add kinetic and potential energy and then equate to...

Homework Statement Consider a satellite in circular low Mars orbit 300km above the planetary surface. R = 3396km M = 6.419 x 1023kg G = 6.674 x 10-11m3/kg/s2 Find the orbital velocity of the satellite (using the given values, I assume, as there is some inaccuracy in the real-life mass value...

Hi guys, I'm currently doing a little project an I need to calculate the speed of a satellite around the sun! I'm currently trying with the Earth, but i have some problem. When I'm using this formula : (2*Pi*a*Sqrt(1-e2))/T(1±e) I get an answer in km/s which seams pretty good. (29,75 km/s) But...

Homework Statement A geostationary satellite is to be placed to view the far side of the moon. How far away should it be placed from the center of the Earth and what velocity should it travel in order to maintain its orbit? (Considering the moon and Earth as one entity and solve for the center...

Homework Statement A 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around Earth. A) Find the radius of the orbit B) Find the speed of the satellite C) Find the period of the orbit I found this set of questions a bit trickier, although am...

How do GPS Satellites work exactly, with emphasis on exactly. I know that GPS satellites use electromagnetic waves to send out a signal of their current location and time for GPS devices to pick up. Using at least 3 GPS satellites, GPS devices can pin point their location by knowing the...

I'm trying to calculate the final position of the missing Malaysian plane with the coordinates of the satellites known but I can't find the pseudorange of the four Inmarsat satellites on the Internet. Where can I find it?

Hello! So this is a rather stupid question, but I'm having trouble with gravitational fields, and can't exactly pinpoint what's going on. The total energy of an orbiting satellite is (due to ME = KE + GPE) (-GMm/2r), right? Well, I have found multiple statements that claim that the 'r' we use...

How can I mathematically determine curvature for a satellite dish for a specific radio wavelength?

An object stand in the height 500km from the surface of the Earth. What velocity should it have to become an Earth satellite?

Homework Statement An object stand in the height 500km from the surface of the Earth. What velocity should it have to become an Earth satellite? Homework Equations a=v2/r The Attempt at a Solution v2=a*r=6,9*107=>x=8306m/S , but the solution is 7600m/S

Greetings! I would like to know how to calculate the time, or fraction of orbital period, that a satellite spends in umbra? (total solar eclipse for satellite when they aren't affected by Solar radiation pressure and solar panels don't generate power). Information given would be satellite's...

Homework Statement A 1,000 kg satellite traveling at speed "v" maintains an orbit of radius, "R" around the earth. What should be its speed if it is to develop a new orbit of radius "4R" ? Homework Equations Gravitational force equation (F) = (Gmems)/r^2 G (universal gravitational constant) =...

Homework Statement "In order to launch a space probe out of the solar system, it is decided to send it close to Jupiter. Why does this reduce the amount of fuel needed?" Homework EquationsThe Attempt at a Solution I can't think of anything at all. I am trying to think in terms of it gaining...

A satellite has been placed in a circular, sun-synchronous orbit at an altitude of 1300.0 km. The satellite has a mass of 5,000.0 kg. What is the K.E. of the satellite? I know K=(1/2)mv^2 ... but I have no idea where to go from here. I Know I am over-thinking this. So any help would be greatly...

Homework Statement A spaceship in outerspace has a donut shaped with a 500 m outer radius. The inhabitants stand with their heads towards the center and their feet on an outside rim. Over what time interval with the spaceship have to complete one rotation on its axis to make a bathroom scale...

So, I'm working on my semester finals for my high school physics class, and I've run across a problem that has me stumped. I've included the pertinent material below. Homework Statement A rocket with a mass of 2kg and traveling at 14,008.34 meters/second loses 10% of its velocity as finishes...

it is said that a settelite is a free falling body. For free falling body its velocity should free continuesly increasing. Is it true? I am confused..

Hi all, This question is for an assignment due Friday. My friend and I spent the better part of an hour on it and are thoroughly stumped. Any help is much appreciated! 1. Homework Statement Calculate the energy required to put a satellite into geostationary orbit. (note that no mass is...

Hi! What are technical characteristics of electromotors inside satellite dish motors? Can someone write here some models of these electromotors? Especially I'm interested about motors which carry 120cm steel satellite dishes. I think 120cm steel satellite dish is about 15kg weight. Thanks in advance

Homework Statement A spy satellite of mass m is in a circular orbit with radius R and velocity v around the earth. One of the satellites thrusters suddenly fires giving it an additional velocity v in the outward radial direction (same v). What is the new total energy of the satellite? What is...

This is one of the questions in the book without an answer and it is really frustrating that I can't check if my through process is correct. Two satellites X and Y are seen from the ground crossing the night sky at the same time. Satellite X crosses the sky faster than Y. State with a reason...

Homework Statement A) Suppose you are on Earth's equator and observe a satellite passing directly overhead and moving from west to east in the sky. Exactly 12.0 hours later, you again observe this satellite to be directly overhead. How far above the Earth's surface is the satellite's orbit...

I know that the the satellite will lose speed(due to perhaps small air resistance), and therefore lose centripetal force? I am not sure how losing centripetal force and speed causes the satellite in orbit to lose radius. If force is the same, and velocity is lowered, than radius would increase...

Q1 Why does a satellite(or any space capsule etc) moving in a stable circular orbit around Earth behaves like a freely falling body?? Q2 Why do the astronauts in these capsules are said to be in weightless condition?? i m not much convinced with the solutions to my doubts so i would appreciate...

Homework Statement If NASA wants to put a satellite in a circular orbit around the sun so it will make 2.0 orbits per year, at what distance (in astronomical units, AU) from the sun should that satellite orbit? The Earth's orbit is 1.0 AU from the sun. T_E = \frac {1.0orbit}{yr} T_s = \frac...

Greetings all ! I really hope this is the right sub-forum for my question, I have chosen it because I've seen TLE being mentioned a couple of times around here. I have done some reading on astrodynamics and orbital mechanics, but I am relatively new to coding. I would like to write some C++...

Homework Statement A satellite has a circular orbit 500 km above earth. A ball is thrown directly downwards radially at 20 m/s. Find the path of the ball relative to the satellite. Homework Equations mv^2/r=GMm/r^2 The Attempt at a Solution From the height of the orbit you can easily solve...

A satellite in orbit around the Earth has a period of one hour. An identical satellite is placed in an orbit having a radius that is nine times larger than that of the first satellite. What is the period of the second satellite? (a) 27 h (c) 4 h (e) 0.04 h (b) 3 h (d) 9 h** I...

Homework Statement A i kg mass is in a satellite must move to a higher orbit. energy must be added. Can this energy be added at one time, by shooting the mass? Homework Equations Potential energy: ##E_p=\frac{GMm}{r}## Gravitational force: ##F=\frac{GMm}{r^2}## The Attempt at a Solution The...

Homework Statement A satellite is put into a stationary orbit around earth, i.e. it stays above one point, then it passes through a cloud and looses 10% of it's kinetic energy. it is stabilized again in a new orbit, what's the new radius. Homework Equations Attraction force...

Hey, I'm doing a research on artificial satellites, and I'm really confused about the escape velocity required for an artificial satellite to escape from the gravitational attraction of the Earth. I know that the equation for it is v^2 = 2GM/r , and with that, the rocket should launch at that...

Dear Experts, When we launch a satellite, we launch it from Earth which is spinning, so the tangential velocity component of the point on the surface where the rocket is launched from will be acquired by it. Is that the only horizontal velocity or is the rocket accelerated at an angle upward...

Wikipedia states that "In the vis-viva equation the mass m of the orbiting body (e.g., a spacecraft ) is taken to be negligible in comparison to the mass M of the central body." I'm wondering how the velocity is determined if the satellite's mass is non-negligible. For example, in a binary...

Homework Statement A satellite of mass m is in a circular orbit of radius 2RE around the Earth. The satellite hits a piece of space junk of mass mj. The space junk, which was initially at rest, sticks to the satellite. The satellite and junk then fall as one in a new elliptic orbit around the...

If the satellites are spread out as a big baseline telescope? Or there are other problems that even that method can't solve when watching the ground?

I can see how the satellite has enough power to broadcast to the phone, but it's perplexing to me how the phone has enough power to broadcast to the satellite, especially when it comes to these small modern satellite phones. They don't seem to even be aiming the signal. Just from my...

Homework Statement A satellite orbits, what should it do to move to a larger orbit (a greater radius) Homework Equations Velocity in orbit: ##v=\sqrt{\frac{GM}{r}}## The Attempt at a Solution There are 2 options. the first, to my opinion, is to increase the velocity in the direction of...

Relativistic frequency shift of satellite signal Homework Statement An Earth satellite used in the Global Positioning System moves in a circular orbit with period 11 h 58 min. (a) Determine the radius of its orbit. (b) Determine its speed. (c) The satellite contains an oscillator producing...

Does anyone know if the black knight satellite is real. If so it is continuously streaming information and can that information be accessed by anyone. It is said to be in a polar orbit, could it be seen in Alaska at any given time and if so how would it be distinguished from any other...

Homework Statement A communication satellite is orbiting 36 000 km above Earth’s surface. Two cities, 3500 km apart are transmitting to and receiving signals from each other. Find the time required to transmit a signal from one city to the other. They are equidistant from the satellite. h...

Homework Statement A satellite of mass m is in circular orbit about a planet of mass M, with orbital radius r. Show that with two appropriately located impulses, each directed along the satellite's instantaneous velocity at the moment of the impulse, it can be raised to a new circular orbit of...

Homework Statement A satellite GeoSAT is in a circular geostationary orbit of radius RG above a point P on the equator. Another satellite ComSAT is in a lower circular orbit of radius 0.81RG. At 7 P.M. on January 1, ComSAT is sighted directly above P. On which day among the following can ComSAT...

Homework Statement A 20 kg satellite has a circular orbit with a period 2.4 h and radius 8.0×106m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.0 m/s2, what is the radius of the planet? Homework Equations F =...

Homework Statement A satellite of mass 45.5 kg orbiting the Earth moves from an orbit of 7271 km to an orbit of 7356 km. what is the work done by all forces acting on it? Homework Equations U=GMm/r The Attempt at a Solution I calculated the total energies of the satellite in both...

The escape velocity of a satellite circularly orbiting a large body comes from conservation of energy. Are there any modifications that must be made for the escape velocity of an elliptical orbit? Thanks in advance!