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Questions tagged [rendezvous]

Orbital maneuver during which two spacecraft arrive at the same orbit and approach to a very close distance. Rendezvous may or may not be followed by docking or berthing.

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Did the astronauts of Gemini 4 had any realistic rendezvous simulator training of orbital mechanic effects?

Gemini 4 was the first but unsuccessful try of a rendezvous maneuver in space. There was a Rendezvous Docking Simulator in Langley, it became operational in June 1963. [Gemini 4] was launched two ...
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Why did rendezvous on Gemini 4 fail so badly?

I can't for the life of me understand why commander Jim McDivitt thought he could eyeball a rendezvous - point the nose and thrust . The futility of that technique is one of the first things even ...
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What is a four-orbit rendezvous? [duplicate]

In a book I'm reading, there is a sentence like this: However, such a long rendezvous is cramped, uncomfortable and not the most efficient use of time for astronauts or Mission Control, and so ...
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Worst damage incurred during a rendevouz or docking operation?

Has there been any damage incurred during a rendevouz of two spacecraft? I was reading the answer to this question and starting realizing the sheer number of things that could still go wrong even if ...
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Why was orbital rendezvous considered so controversial?

It's popularly understood that the Apollo program only selected lunar-orbital rendezvous as a mission profile after first thoroughly rejecting the direct ascent profile. It seems as though the ...
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Full Mission Analysis elements?

I am trying to complete a full trajectory design and analysis for a low thrust interplanetary mission to Mars. Right now, computing optimal trajectories from Earth to Mars for a number of dates and ...
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Optimal Thruster Layout For Cubesat

I am working on a simulation of a Cubesat for rendezvous. Using the Clohessy-Wiltshire equations I calculate delta-v. Now that I know the thrust needed for operation, I would like to know how to ...
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Why was Apollo mission launched on one big rocket? Wouldn't rendezvous in earth orbit using a smaller rocket have been an easier challenge?

Apollo already had some hardware for rendezvous on lunar orbit, so why not do the same on earth orbit and use smaller rocket? I suppose designing smaller rocket is simpler and also building double ...
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Can someone give me a 'trajectory optimisation for dummies' answer?

So, I am currently doing a project on trajectory optimisation. I get the principle of it, minimise fuel cost for a journey, or try to maximise the spacecraft weight at target destination, and that ...
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How to plot a Clohessy Wiltshire trajectory on MATLAB?

So I essentially want to plot the change in trajectory as I perform a maneuver using the clohessy wiltshire equations to chase a target. I have a for loop for 10,000s and I would like to calculate ...
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Clohessy - Wiltshere equations in electric propulsion

Further to my "asteroid chasing" question regarding the HCW equations (Clohessy - Wiltshire equations for use in Asteroid "chasing"), I was wondering if there was some transformation of ...
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Clohessy - Wiltshire equations for use in Asteroid “chasing”

So I'm actually a student studying this sorta thing, and an assignment I have is to chase/rendezvous with an asteroid. I've done my reading on the C-W equations (what little I could understand) and ...
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How important is plume impingement in rendezvous operations?

When performing space rendezvous operations close to the target vehicle (0-5 m relative distance), pursuer thruster escape nozzle gases can hit the target if firings are done in the direction of ...
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How to calculate if a co-location intercept is possible in a ballistic counter-battery scenario

Let us presume that we have a scenario with ballistic objects. As an example, one object $m_1$ is launched at time $t_0$ from Earth Location $a$ towards Earth Location $b$, both of which are in the ...
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Has on-orbit refueling ever been demonstrated with cryogenic fuels?

Looking at the question Has in-space refueling been done?, it looks like all fuel transfer operations in orbit have been done with room-temperature hypergolics. Has on-orbit transfer of cryogenic ...
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How did Soyuz MS-04 reach the ISS in only 6 hours?

The Wikipedia Article on Soyuz MS-04 says: It is the first of the Soyuz MS series to rendezvous with the Station in approximately 6 hours, instead of the 2 day orbital rendezvous used for the ...
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Why did STS-32 require 11 major firings of Columbia's maneuvering engines?

I was reading the Mission Safety Evaluation Report for STS-32 and I noticed the following passage: The STS-32 rendezvous was one of the most complex the Space Shuttle had ever attempted, ...
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Launch windows for on-orbit rendezvous

Suppose you've got a spacecraft in an orbit similar to that of ISS (let's say 51.6 degrees, but about 19 km lower). Suppose also you want to launch a second spacecraft to rendezvous with the first, ...
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Would an orbital scaffold or shipyard be useful?

Suppose you have a manned orbital shipyard. It obviously has no manufacturing capability, but instead it serves as an anchor and assembly point for modules launched from earth. It might have remote ...
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How did the Apollo 11's Eagle ascent stage find the CSM after leaving the Moon?

I've always been curious how did the Apollo 11's Eagle ascent stage of the Apollo Lunar Module navigate back to the Apollo Command/Service Module (CSM) that was in lunar orbit? Was it simply a case ...
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Sparking/arcing distance between two spacecraft?

What is the distance two spacecraft will spark/arc at in SSO? Eg if one has just launched and one has been there a long time (eg a 10-20kV worst case voltage difference). I think Paschen's Law is the ...
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How did Gemini/ Agena rendezvous?

From this Wikipedia article, the time to launch between the two missions was 1 hour 41 minutes (15:00 and 16:41 UTC, respectively), which is pretty much 1 orbit in LEO. That would give a nodal ...
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Soyuz TMA-18M ISS rendezvous: expedited 4-orbit vs regular 34-orbit - How does fuel usage compare?

Follow up to this question: Why will Soyuz TMA-18M take two days to reach the ISS?. Clearly the expedited rendezvous is cheaper in terms of time. However I was wondering how fuel usage compares. Is ...
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What are the steps between rocket launch and docking to the ISS?

This question focus on space missions docking with the ISS. On this youtube video, the process to rendez-vous with the ISS is described. If I understand correctly, it consists in taking of, place the ...
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How long does one orbit around the Moon take in a typical parking orbit for a stage a lander is going to meet?

I have been pondering the relative advantages of placing a base near the Moon's equator, or at the poles. The poles have been defended as having a superior business case because of deposits of ...
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Docking in orbit

What systems are used for range, speed and alignment when docking in orbit? Whether automatic, human controlled arm, or Apollo style human controlled ship to ship? Playing Kerbal Space Program, I ...
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Could a rescue spacecraft be in an orbit with rendezvous windows for ordinary LEO, GTO or deep space launches?

Sometimes orbital insertion fails which could be fixed by a space tug. I wonder if a tug could be placed in a long term orbit such that it sometimes matches the intended orbit of a launch from Earth. ...
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Will any of the COTS providers be able to perform expedited rendezvous with the ISS?

Russians have been doing expedited four-orbit rendezvous with the International Space Station (ISS) for quite a while now, and when it works, its benefits are apparent; You get there before you'd even ...
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Has in-space refueling been done?

Before the Apollo program committed to the lunar orbit rendezvous mode, one of the Earth orbit rendezvous proposals involved launching two Saturn Vs, one with the Apollo spacecraft and large lunar ...
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Limitations of Clohessy-Wiltshire equations

The Clohessy-Wiltshire equations are a simplified (linearized) model that is applicable under few assumptions: close range circular target orbit no disturbances My question: Up to which boundaries ...
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Orbital rendezvous with low-thrust engines?

The Hohmann Transfer is clear enough; Accelerate on your (circular) orbit at the right time, raising the apoapsis until it meets the target orbit. Once there, burn again to raise the periapsis - ...
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Finding accurate periapse rendezvous radius using interplanetary Lambert solver

I have a numerical interplanetary trajectory model and am trying to find a way to accurately insert a spacecraft into a rendezvous orbit with its target planet having a particular periapse radius (for ...
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How can you rendezvous with the ISS via the “Soyuz scheme” without a computer and out of ground contact?

Let's assume the flight rules don't prohibit you from going to the ISS in a malfunctioning craft and don't force you to land on next orbit, unlike the real life ones. Let's also assume you have an ...
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Clohessy-Wiltshire equations vs. Lambert solver for low-Earth Orbital Rendezvous

Just a quick question: Is a Lambert solver a generalization of the Clohessy-Wiltshire equations when regarding, for example, orbital rendezvous around Earth?
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How is an orbital rendezvous planned?

I'm curious how people plan an orbital rendezvous. This question explains the basic principles, but not in enough detail for me to understand how it actually works. From playing Kerbal Space Program, ...
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How do spacecraft rendezvous in orbit?

Given two spacecraft (let's say, the ISS and an unmanned resupply capsule), how do the two spacecraft rendezvous with each other in space? If they're moving at the same speed in space, they'll never ...
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If Space Adventures actually does a Soyuz around the Moon, will this be the first real Earth Orbit Rendezvous launch?

Space Adventures is selling a seat for a flight around the Moon in a Soyuz for \$150 million. Reading a SpaceFlight Now article, it says: The probable flight plan calls for the moon-bound crew to ...
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Do we sufficiently understand mechanics of Lagrange point stationkeeping for EML2 rendezvous and assembly?

I've been watching some recorded videos from the April 22 - 24, 2014 Humans2Mars conference (videos and live streams, when available, are on the National Institute of Aerospace channel on Livestream), ...
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Why did the rendezvous attempt fail on Gemini 4?

It is said in Wikipedia, that On the first orbit, McDivitt attempted to rendezvous with the spent Titan second stage. This was unsuccessful for a number of reasons: NASA engineers had not ...