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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 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.
Bharath Simha Reddy's user avatar
1 vote
0 answers
61 views

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 ...
Shawn Lim's user avatar
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7 votes
2 answers
2k views

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-...
Yi Qiang Ji's user avatar
3 votes
0 answers
199 views

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 ...
cj91's user avatar
  • 31
2 votes
0 answers
226 views

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 ...
Torus403's user avatar
2 votes
1 answer
65 views

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 ...
Aid22's user avatar
  • 109
3 votes
0 answers
68 views

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 ...
Peter - Reinstate Monica's user avatar
2 votes
1 answer
218 views

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 ...
Omar Shehab's user avatar
0 votes
0 answers
223 views

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 ...
z1995's user avatar
  • 17
1 vote
1 answer
375 views

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 ...
fas_dev's user avatar
  • 11
7 votes
1 answer
927 views

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 ...
Bash Frank's user avatar
6 votes
1 answer
456 views

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 ...
Woody's user avatar
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10 votes
2 answers
2k views

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 ...
Mys_721tx's user avatar
  • 976
2 votes
1 answer
132 views

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 ...
uhoh's user avatar
  • 149k
3 votes
1 answer
91 views

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 ...
BrendanLuke15's user avatar
6 votes
1 answer
363 views

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 ...
WarpPrime's user avatar
  • 3,125
8 votes
3 answers
719 views

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 ...
theCrazySander's user avatar
2 votes
1 answer
156 views

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{...
WarpPrime's user avatar
  • 3,125
2 votes
1 answer
686 views

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 ...
ALiCe P.'s user avatar
  • 123
8 votes
1 answer
525 views

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 ...
McKenning's user avatar
  • 183
2 votes
0 answers
77 views

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 ...
user avatar
5 votes
2 answers
267 views

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 ...
Matthew Christopher Bartsh's user avatar
-2 votes
1 answer
159 views

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 ...
Bogdan's user avatar
  • 7
5 votes
1 answer
227 views

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 ...
Kozuch's user avatar
  • 1,483
4 votes
1 answer
641 views

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 ...
ymb1's user avatar
  • 2,423
2 votes
1 answer
215 views

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 ...
Elisa Fitri's user avatar
4 votes
1 answer
616 views

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....
dreed75's user avatar
  • 41
4 votes
1 answer
220 views

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 ...
JGJDM's user avatar
  • 41
4 votes
1 answer
173 views

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 ...
Sun's user avatar
  • 73
3 votes
1 answer
503 views

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 ...
zabop's user avatar
  • 686
6 votes
1 answer
1k views

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 ...
LoveForChrist's user avatar
1 vote
2 answers
398 views

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....
Elisa Fitri's user avatar
7 votes
1 answer
547 views

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 ...
uhoh's user avatar
  • 149k
3 votes
1 answer
211 views

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....
Elisa Fitri's user avatar
4 votes
0 answers
82 views

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).
Vivek Darapaneni's user avatar
5 votes
1 answer
680 views

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 ...
Elisa Fitri's user avatar
2 votes
2 answers
179 views

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 ...
Elisa Fitri's user avatar
3 votes
1 answer
125 views

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 ...
CJ Dennis's user avatar
  • 653
8 votes
1 answer
1k views

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: ...
uhoh's user avatar
  • 149k
0 votes
1 answer
226 views

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 ...
Elisa Fitri's user avatar
1 vote
1 answer
368 views

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 ...
Elisa Fitri's user avatar
12 votes
3 answers
1k views

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 ...
uhoh's user avatar
  • 149k
4 votes
0 answers
35 views

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?
Olivaw's user avatar
  • 147
4 votes
1 answer
196 views

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 ...
Norman F.'s user avatar
9 votes
2 answers
853 views

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 ...
uhoh's user avatar
  • 149k
4 votes
2 answers
1k views

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?
Bob516's user avatar
  • 6,939
3 votes
0 answers
106 views

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 ...
Elisa Fitri's user avatar
25 votes
4 answers
4k views

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 ...
usernumber's user avatar
  • 5,048
4 votes
1 answer
548 views

Statites - Are they possible in anything but theory?

In this question someone mentioned the idea of a Statite, a satellite which is stationary above a planet without being in orbit, usually in an orientation which is not possible with an orbit. It seems ...
Magic Octopus Urn's user avatar
4 votes
0 answers
62 views

Is TEMPO firmly planned to be launched?

The Tropospheric Emissions: Monitoring POllution (TEMPO) instrument (see Smithsonian Institute, EO Portal, or WMO Oscar) is supposed to measure air pollution over North America from a geostationary ...
gerrit's user avatar
  • 11.7k