Questions tagged [geostationary]
Questions about orbits whose position in the sky remains the same for a stationary observer on the primary body.
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How much payload could the Falcon 9 send to geostationary orbit?
How much could a fully expendable Falcon 9 lift to GEO? How does this number change if the Falcon 9 performs a drone ship landing or an RTLS landing?
To further add to the confusion, Encyclopedia ...
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E/I separation for GEO statellites
Two GEO satellites are being colocated using the E/I separation method. Typically, the eccentricity vector would trace a circular motion with the circle positioned in the first quadrant of the Ex-Ey ...
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How to find out details on which country owns how many GEO stationary orbital slots
I would like to know on the orbital slots information (GEO) of few select countries and their current status. Please suggest the right source for them.
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Tradeoff between a LEO-LEO vs LEO-GEO data relay
For both commercial and government entities alike, the need for reduced turnaround time in payload delivery (e.g. for optical or synthetic aperture radar images) has led to the development of data ...
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Does it economically cost the same to launch a satellite into LEO and GTO?
I was doing some research about how much $/kg it costs to launch a satellite into GEO. I came across several sources that lists info for LEO:
https://ourworldindata.org/grapher/cost-space-launches-low-...
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Why do ~GEO sats seem to cluster around the top portion and bottom portion of the belt, 180 degrees apart?
I made a 3D tle model from https://www.space-track.org/ API. I drew a dashed blue line to show the really "geo" orbits that hardly move with time (ECEF). Then there are a bunch of sats that ...
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GEO station keeping in GMAT
I am currently trying to implement station keeping maneuvers for a geosynchronous satellite in orbit around Earth using the General Mission Analysis Tool (GMAT) but I am not managing.
I know there are ...
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Inter-satellite/Inter-platform communication requirements
I am studying Inter-satellite/Inter-platform links and would like to compute the link budget: Satellite-Satellite or HAP to HAP ( high altitude platform).
For my computation, I am looking for a ...
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Eutelsat 13G and Spacebus NEO's all-electric propulsion
Today, Eutelsat's Hotbird-13G was launched by a Falcon 9 to a "geosynchronous transfer orbit".
Deployment was at an altitude of roughly 1100 km. The satellite must reach a geosynchronous ...
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Creating a classroom tool for satellite location
I would like to create a sun-dial type project for seventh graders which they can use to locate their favorite geostationary satellite. These are the kids who will probably hear about satellites for ...
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What is the distance between Mars and the lagrange point L2 Mars Sun? [duplicate]
I am writing a science fiction novel that is more soft that hard sci fi but I would like to know at least an estimat of the distances between L2 Mars Sun and Mars. I know that asking for an exact ...
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What would the TLE data (Mean Motion, Eccentricity, Inclination, RAAN, Argument of Pericenter) of GEO and PO be like?
I am currently making a satellite tracker app for android. I want to test my orbit propagation algorithm and I want to make some made-up basic orbits, so I need to know how their TLE would be. I want ...
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What size are the typical keep-inside boxes of geostationary telco satellites?
Geo sats need station-keeping and the size of their keep-inside box is a design parameter. A smaller box implies more manoeuvres to stay inside the box. All depending on the various orbit ...
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How to attain an equatorial orbital inclination from a non-equatorial launch site?
The orbital inclination of a satellite is limited to inclinations roughly equal or greater than the latitude of the launch site, unless additional energy is expended for an orbital plane change.
In ...
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When and why did three-axis stabilization become prominent in geostationary satellites?
Since the very first Sycom 1, geostationary satellites from 1960s to 1980s are cylindrical with solar cells covering the body of the satellite. Such examples include:
GOES 1 to 7
AsiaSat 1 and its ...
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What was the first spacecraft intentionally moved from GEO to the graveyard orbit to die? (just a bit above geosynchronous)
Why “super” for supersynchronous orbits? Why not “trans”? and discussions and answers there got me wondering:
Question: What was the first spacecraft intentionally moved from GEO or geosynchronous to ...
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Are there uses for these 'quasi iso-propic' supersynchronous transfer orbits?
In my answer to What are the benefits of supersynchronous transfer orbits? I stumbled upon an interesting outcome when considering the total $\Delta V$ cost from an inclined low altitude parking orbit ...
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When is the supersynchronous orbit more efficient than a typical Hohmann transfer where inclination change and circularization are simultaneous?
The title essentially explains it all. Some GEO launch vehicles like Proton, which launches from Baikonur at a latitude of 46 degrees, launch into a supersynchronous orbit. So at what point is the ...
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Is it possible to create a geostationary surveillance telescope?
Is it possible to create a telescope in geostationary orbit, with real-time video from any country or area?
Some applications could be:
Monitoring of burning and deforestation;
Residential/industrial ...
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What's wrong with my bielliptic transfer calculation?
I'm trying to calculate the delta-v needed to get from a 200 km circular orbit to a geostationary orbit. GSO is at an altitude of 42164140.1029448 m and at a speed of 3074.6611762 m/s. Because $\frac{...
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How to calculate the height above the horizon of a geostationary satellite on a given latitude?
Wikipedia's Geostationary orbit; Communications says:
Geostationary communication satellites are useful because they are visible from a large area of the earth's surface, extending 81° away in both ...
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Could a near earth asteroid perturb a satellite out of earth's orbit?
Given a satellite in GEO or a graveyard orbit, what characteristics of a passing NEO would be required to perturb said satellite out of Earth's influence and into a sun-bound or sun-centered highly ...
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How to calculate when an areostationary satellite would be unable to talk to earth?
Consider an areostationary (geostationary but for Mars) satellite that communicates to Earth. Since on some orbits, Earth would be behind Mars from the point of view of the satellite, I imagine that ...
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Are there any satellites in geosynchronous orbits that are neither geostationary nor 'wobbly geostastionary' (figure of eight geostationary)?
None of the examples in this question: Are there any satellites in geosynchronous but not geostationary orbits? are nothing like geostationary. They still stay above the one side of the earth. What ...
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I think I have an idea of how to stop global warming, where can I share it? [closed]
It is quite simple space technology that will require a lot of funds and some physical and biological research, but I think it is realistic to create it because the idea is simple (build special space ...
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Biggest orbital inclination change done in Earth's orbit
Generally orbital inclination change is said to be (fuel) expensive. What is the biggest orbital inclination change (in degrees) done in Earth's orbit for an orbiting object? Can this be broken down ...
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What does a 6-month GTO to GEO transfer look like in practice?
Based on How much time does it take to circularize a GTO orbit using ion propulsion? and the launch and entry into service dates, it takes about 6 months of continuous ion propulsion to transfer a GTO ...
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GEO Satellite Eccentricity Maneuver
The picture above is eccentricity evolution for one year of a GEO satellite. Based on that eccentricity evolution, I want to do maneuvers to correct the eccentricity. But I have problems, I am ...
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Computing a new TLE following a delta-v impulse?
Is there some code or a library out there that can take orbital elements, add a known delta-v component and then compute a new TLE? I found this one https://apps.dtic.mil/dtic/tr/fulltext/u2/a289281....
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What is the Best position of an object in geostationary orbit relative to the launch site for rendezvous using GTO?
So let's say we have a space station or spacecraft in GEO, and I want to get another spacecraft to it from earth's surface on a direct geostationary transfer orbit, i.e. no waiting about in LEO for ...
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Satellites Orbital Parameters
I want to access satellites' orbital parameters like inclination, right ascension of ascending node and argument of perigee. Unfortunately, I haven't been able to find this information.
Is there a ...
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Map showing which part of geostationary orbit is allocated to which country?
This article (google translated version) says that part of the geostationary orbit is allocated to Hungary (they are talking about 4°W).
Is there a map, which shows me which part of the orbit is ...
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Are all or some geostationary satellites tidally locked to the Earth?
Satellites in geostationary orbit always remain above the same location on the Earth's surface, at an altitude of 35,786 kilometres (22,236 miles) above the equator. But I wonder whether they're also ...
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Stable and Unstable point for GEO satellite
For GEO satellite, 24h period, it has four equilibrium points (two stable point and two unstable point). At the equilibrium point, the transverse acceleration is zero, so semimajor axis changes slowly....
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How could RCA Satcom III have been completely lost? (Or was it?)
This answer to What “missing satellite” was part of the story of CNN's debut? quotes the 1981 UPI Article The RCA Satcom III-R commercial communications satellite, designed to... as follows:
The ...
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Inclination Maneuver of GEO Satellite
I have performed inclination maneuver for GEO satellite at ascending or descending node. The inclination of the satellite is 0.05 deg. Then I performed the maneuver so the inclination change to 0....
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Any commercial communication satellite in GEO Orbit that supports 25 KW Power?
As I understand, EchosTAR-11, built by Space systems Loral, was the first 20KW Commercial satellite.
(Reference: Recent Successful satellite systems- Visions for future by D.K.Sachdev).
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Station Keeping East-West Maneuver
A GEO satellite spends 14 days in longitude deadband (+/-0.067 deg). At the 14th day, I want to perform an east-west maneuver. But I am uncertain what time I should perform the maneuver at the 14th ...
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North-South Satellite Manuever
I am doing North-South manuever for GEO satellite. My purpose is to reduce the inclination. My initial inclination is 0.07 deg, and my target inclination is 0.0002 deg. I have tried the maneuver in ...
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Why would a mission choose a geosynchronous orbit over a geostationary orbit?
I was going to ask "Are there any missions where a geosynchronous orbit is advantageous over a geostationary orbit?" The TL;DR answer to this question (Are there any satellites in geosynchronous but ...
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Why does Himawari-8 have problems with the Sun from 19th February to 19th April?
This weather site uses provides meteorological imaging from the Himawari-8 Earth observing satellite in GEO. https://www.cwb.gov.tw/eng/
The web site contains the following item:
...
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Inclination and latitude of GEO satellite
My satellite inclination is almost zero, but the latitude that I got was almost 0.1. In my mind, the latitude is should be near zero when the inclination is zero, but as I explain above, I got ...
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STK SGP4 for Geostationary Satellite
I am using SGP4 propagator in STK to propagate my GEO satellite.
SGP4 need TLE as an input.
In TLE, I found the inclination of my satellite is 0.048. But the inclination result of SGP4 is 0.15.
The ...
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Is the risk of explosion-induced damage to operational spacecraft in GEO actually reduced substantially by raising Spaceway-1 by 300 km?
Engadget: DirecTV satellite is at risk of explosion due to battery issues
Space News: DirecTV fears explosion risk from satellite with damaged battery
say that the spacecraft must move 300 km above ...
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Is there a tool for modeling what power requirements different satellite modules have?
Reading about FADsat made me think of this because it does exactly that. Maybe a better question is does anyone know of a tool like FADsat?
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Analytical treatment of relative positions between satellites?
I have been searching the internet for estimation of relative position between two satellites. However, all sources seem to be pointing to methods used for proximity operations, where the math ...
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How do stable equilibrium points work in GEO? If all geosynchronous spacecraft suddenly lost stationkeeping, would most "fall into" one or the other?
The (currently unanswered) question Quantitatively, how deep are the stable equilibrium points in GEO? How much delta-v to move from one to the other? (also see comments at Delta-v to move from GEO to ...
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Launch system to get a 75,000 kg object to geostationary orbit?
Is there any current launch system that could get a 75,000 kg object to geostationary orbit? If not, am I correct in assuming the Saturn V could have gotten such an object there?
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Longitude deadband of geostasionary satellite
I try to count longitude deadband of geostationary satellite (0.1 degree). But I still confused, where should the longitude I have to start? In the picture, should I start the longitude from the far ...
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Name for geostationary orbit around another planet
A geostationary orbit is a circular orbit in Earth's equatorial plane whose rotation period matches that of the Earth.
The "geo" in "geostationary" means Earth, so is there another term to designate ...
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