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Results tagged with station-keeping
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user 12102
Operations done to keep a spacecraft in a particular orbit. Generally done by by thruster burns. In LEO this must be done to counteract the momentum loss to atmospheric drag. In other orbits it may be needed to maintain a planned relative position over a long period of time.
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Do operating GPS satellites ever make orbital maneuvers for station-keeping?
Since GPS satellites need to face the Earth, they might execute momentum-unloading from time to time using pairs thrusters so as to produce torque but minimal change in the orbit, but I am guessing th …
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What factors would make station-keeping of an Areostationary Mars satellite necessary?
This answer introduced me to the word Areostationary Orbit - (hint, comes from Ares), an orbit that would remain stationary above a point on the equator of Mars.
The article mentions that gravitation …
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How did DSCOVR use its ten thrusters for the long burn maneuvers MCC and LOI?
From this answer to my previous DSCOVR question, and this and this and this article, it seems that DSCOVR used one or more of its ten thrusters for the long burns for mid course correction (MCC) and L …
- 151k
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What is the Distinction between DSCOVR's "engines" and "thrusters"?
I am reading this article about DSCOVR which links (ref 16) to this: DSCOVR: Mission Success for Moog Engines Over a Decade Later
, about the recertification by MOOG of the MONARC 5N monopropellant en …
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Will the ISS have electric propulsion to maintain altitude? Is there enough power for it?
In April 2014 this comment was made below the question What propulsion methods does the ISS use for station-keeping?:
In November they said in three years, so perhaps late 2016. Since such claims …
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Station-keeping delta-v per year for an Earth-Moon vanilla halo orbit?
This answer reminds us that an Earth-Moon L1 or L2 vanilla1 halo orbit remaining always visible to some patch on the Moon's surface requires station-keeping.
Queqiao uses such an orbit having continuo …
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Xenon vs Hydrazine, "Should I Stay or Should I go?" Dawn mission decisions
edit 2: There seems to have been some announcement/extension by NASA (20-Oct-2017), possibly this will shed more light on the issues in this question.
edit 1: Several months have passed since this que …
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Is this what station keeping maneuvers look like, or just glitches in data? (SOHO via Horizons)
I've been enjoying the JPL Horizons web interface and after I discovered the incredibly extensive database associated with SOHO (Solar and Heliospheric Observatory, also see sohowww.nascom.nasa.gov) f …
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How can just making the ground broadcast stronger neutralize a zombie(sat)?
In April of 2010 the Geo-not-so-stationary satellite Galaxy-15 stopped responding to ground commands. It operates as a "bent-pipe" or Transponder system, which means - roughly speaking - it will ampli …
- 151k
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How do stable equilibrium points work in GEO? If all geosynchronous spacecraft suddenly lost...
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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Do operational Starlink satellites run their ion engines at night on batteries? And if so, d...
Discussion below What is the maximum thrust of the Starlink satellites? raise the question of the Starlink communications satellites' power budget and use of their ion thruster in daylight when the pa …
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