Because I have noticed that some of the beginners to rocket simulators seem to be ill-informed on how to rendezvous, or what the things in the map view tell you, I discided to make this informative post.
For those expecting a complete step by step written tutorial on how to rendezvous, this post won’t do that. I tried that in a previous revision of this post and it took up a page and a half single-spaced (needless to say, it would have been long in a forum post), so instead, I will redirect you to a very informative youtube video by Scott Manley on the topics of rendezvous and docking in Kerbal Space Program here. Even though this tutorial is for KSP, the same principals can be applied to rendezvousing in Simplerockets 2.

On the stuff in the map view, here's a brief rundown of the markers that show up in your map view:

The green arrow pointing down to your orbit is your apoapsis (the highest point in your orbit)
The orange arrow pointing down to your orbit is your periapsis (the lowest point in your orbit)
When getting planning an encounter, there are two markers that show up: the first one (the white one that looks like a rocket) is the visual representation of where your spacecraft will be closest to your target for a closest approach. The second one (the other white one that looks like a satellite) is the closest your target will be to you visually at your closest approach.

On the stuff in the “orbit details” box:

When in the map view, there is a box on the right that has some of your orbital elements. To save "space" (pun intended) once again in this post, I won't detail each here, but at this Wikipedia article, everything that is in the orbit details box is described in great detail and then some for those who are more curious.

It should be noted that if you are just starting out, you shouldn’t worry a whole lot about everything in the orbit details box except inclination and possibly the period of your orbit. You should focus on getting used to flying and building things in this simulator. Your Inclination is critical for things like making sure you can rendezvous, and so are the rest but the rest are for calculations like delta-v required for something, transfers, etc.

I Hope this helped. If there is anything that I got wrong in this post, or that you feel should be addressed in this post, please inform me. I would hate to find that had misinformed beginners in such a wonderful thing as orbital mechanics. Happy flying.


10 Comments

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    Ok

    3.2 years ago
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    112 eonn44

    @SpaceSharkie201 considering I made this nearly 3 years ago, and I've neglected playing anything simplerockets 2 related since then, yours will likely be bounds better. I'll be learning this stuff in a lot of detail one of my coming semesters, but until then.

    3.2 years ago
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    I made a different forum which also explains docking here if this wasn’t good enough

    +1 3.2 years ago
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    @sumeee Awesome!! Thank you so much! I'll have to give it a try later today.

    +1 6.0 years ago
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    640 sumeee

    @detroitmoose My guess is that you didn't place the RCS nozzles correctly. Here is what you should do:
    1. finish the final stage (the docking craft) without any RCS nozzles, but with monoprop tank.
    2. add one block (from structural parts), for looks you can size this down to match the size of the RCS nozzle.
    3. add 4 RCS nozzles to that block: front, back, right, left (not on top).
    4. set the symmetry of that block to 4x
    5. toggle center of mass indicator and move the blocks as close to the center as possible (on the surface of the craft, don't move the blocks inside your craft).

    This is a simple design that will allow you to perform all the possible translations / rotations.

    PRO TIP: set the fuel lower in the tank (less then half or the expected value when you will perform the docking). This will help your RCS to cause lower torque on your craft.

    +2 6.0 years ago
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    112 eonn44

    @detroitmoose glad to be of help.

    6.1 years ago
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    @eonn44 Thanks for the detailed information and no need to apologize. I certainly understand!

    6.1 years ago
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    112 eonn44

    @detroitmoose. First off, I want to give my apologies for not answering sucha simple question. I have been caught up in school, and a research essay due at the time of writing this, so I haven't had much time to think about what I would recommend as a decent strategy to go about controlling your craft for docking using rcs. Added to this, I haven't experimented much with actually docking in SimpleRockets 2, so I am not the greatest source in that regard. I can, however, relay some things that I have learned from playing other simulators like orbiter 2016 and KSP. One of the key things to note about docking is to make sure that you aren't translating from side to side, up or down too much while. You want to move from side to side or rotate as little as possible to first off make sure that your fuel lasts while you dock, and second to keep down on overcontrolling your spacecraft which can lead to undesirable results in the long run. Of course, you are going to have to move side to side, and rotate when docking, but the less you have to do, the better. I personally learned how to dock by looking up tutorials like here on how to properly dock in orbiter 2016 by using the docking port alignment MFD, then applying what I learned to simulators like simplerockets 2 and KSP that don't have the docking port alignment MFD. This is how I learned how to dock and control spacecraft for docking, but that could be a bit more involved (not to say of course that it's impossible to learn this way, it's just impractical). Honestly, if you are still uncertain about docking and rendezvous, I am sure that Scott Manley's video here with nearly 500 K view will be insightful.
    On whether you should place RCS nozzles on the front and rear of your spacecraft, I would advise you to do so. without forwards and backward translation controls, you will be stuck with only using your main booster for docking. If you are docking, and you notice that you are moving to fast, then the only way to slow down would be to rotate your craft to either allow the rcs on the sides slow you down or use your main booster by rotating some more (the more practical of the two).
    On the uncontrollability of your spacecraft when rendezvousing, that could be the game itself, or possibly the ship that you are using. Right now, SimpleRockets 2 isn't that RCS friendly at the moment (although I don't know h

    +1 6.1 years ago
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    Very nice! Any suggestions or tutorials on controlling the craft to rendezvous using the RCS? I tried using the method explained in the KSP YouTube video, but my craft goes all over the place. I'm also still not sure if I should add RCS nozzles to the front and rear of the craft to control movement towards and away from my target without using the main engines.

    6.1 years ago
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    I arleady learnt how to in KSP, but I am sure this will help some people.

    +1 6.1 years ago

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