Questions tagged [simulation]

representation of environment or process in a more accessible form using virtual or physical imitation or analogues, often for the purpose of training or testing, includes both real-world (physical) and numerical techniques.

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47
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10answers
10k views

Game for teaching basics of orbital mechanics

I am looking for a game that would be suitable for teaching basic orbital mechanics concepts to primary school students (grades 6-8). Contrary to most of the questions here asking about spaceflight ...
36
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4answers
14k views

Why is my Earth simulation slower than the reality?

It took me a long time to create a simulation of the Earth like that. I wanted to show the real spinning speed of the Earth. Here's my video: From this NASA live ...
35
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1answer
4k views

Is there a mockup of the ISS on the ground?

Is there a replica of the interior of the space station on the ground? For training astronauts and to try out equipment installations.
21
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2answers
7k views

Can Kerbal Space Program act as a suitable simulator with the right mods?

The game is great alone, but if we install a mod called Real Solar System and another called Realism Overhaul, the force of gravity, engine power atmospheric heights and everything happens to real ...
20
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7answers
3k views

The Martian: Does it really take a supercomputer to calculate spaceflight maneuvers?

My preemptive apologies for asking a question about a movie, and the spoilers within said question, but considering the widespread support for its scientific plausibility, I'm hoping you'll let it ...
19
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0answers
226 views

What is the current location of Link-built Apollo Mission Simulators?

There seems to be confusion about the final disposition of, and even the number of, Apollo Mission Simulators built by Link Flight Simulation Division. This question is not about any simulator built ...
15
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1answer
837 views

How did Goddard's rocket reach 41 feet altitude in under 2.5 seconds?

I'm working on a simple rocket flight simulation program, and am trying to reproduce aspects of Goddard's first successful rocket flight. My sources put the empty weight at 5.75-6lbs, loaded weight 10....
11
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2answers
376 views

What orbital mechanics toolkits available today are suitable for a real-time simulator?

I'm a software engineer and I've always loved Orbiter (also here). However I feel that it's growing a bit antiquated, and it would be nice to have a more modern, open source, or otherwise hackable ...
10
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1answer
378 views

Why is FORTRAN recommended for astrodynamics rather than MATLAB?

I understand that FORTRAN might be faster in terms of computation time, but I don't understand why it is always recommended by people in the field. Everyone tends to avoid MATLAB for astrodynamics; is ...
10
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1answer
943 views

Software to simulate / optimize ascent trajectory

I read the previous question on this site about astrodynamics software and I have tried STK (free version) and GMAT, but I could not find software to simulate and optimize a launch trajectory. Is ...
9
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1answer
696 views

How might one approach using AI (convolutional neural network) to predict collisions in orbit?

CNN's Tomorrow's Hero profile Meet Amber Yang. She's trying to prevent a space debris catastrophe describes an investigation into the use of a convolutional neural network (CNN) to predict possible ...
8
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1answer
1k views

What's is this very CGI looking clip in this NASA video of the Alpha Magnetic Spectrometer installation?

This is the NASA video AMS Time Lapse Installation a time-lapse of the Alpha Magnetic Spectrometer (AMS) installation at the International Space Station. At about ...
8
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1answer
247 views

Why not simulate certain regions of the atmosphere of Venus?

Many people would like to know if any form of life could survive anywhere in the atmosphere of Venus. Researchers have simulated conditions on Mars and found that after a month some cyanobacteria ...
7
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1answer
566 views

How were Apollo spacesuits cooled during simulations/rehearsals on Earth?

The answer and comments to How have space suits dissipated the heat removed from astronauts? explain that the Apollo space suits used the sublimation of ice into the vacuum of space to constantly ...
7
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2answers
277 views

Would current computer technology have made the Moon landings any easier?

A few days ago a group of us were discussing the Moon landings (specifically the Apollo programme). Whilst this in itself was incredibly impressive we thought it was particularly impressive given the ...
7
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1answer
227 views

Apollo 15 State Vector recreation

I am trying to get the state vectors for Apollo 15 before, during, and after critical manoevers [sp]. IE TLI, LOI1, LOI2, lunar launch, preocking, postdocking, and TEI. I am a totally newbie at all ...
6
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3answers
3k views

How can you predict an orbit, based on an initial position and an initial direction vector?

I've been developing a planetary simulator in Unity 3D (C#) and I need some help, however I feel this would be a better place for it. I'm starting my planet from a position vector. On initialisation I ...
6
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2answers
697 views

Getting state vectors from JPL Horizons ephemerides

I'm simulating the Sun-Earth-Moon system by numerical integration of equation of motion. I've confused a little bit in JPL Horizons ephemerides. Could anyone explain (if possible, on pictures), how ...
6
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1answer
2k views

Does Kerbal Space Program have a software migration path to Lagrange points, halo orbits, and other 3-body goodies?

At about 05:37 in Scott Manley video Kerbal Space Program 2 - What We Know About The Sequel So I’m cautiously optimistic and I really obviously want this to be ...
6
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1answer
226 views

Info on NASA's NOS3 software and the rest of the suite used by STF-1

THE STF-1 cubesat project, in cooperation with NASA, has developed a whole suite of simulation software for small satellites. Info here: http://stf1.com/simulation.php And here: https://www.nasa....
6
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1answer
569 views

Ascending node with zero inclination

Long time ago, I was wondering which orbital element should I use to differentiate between the blue and red orientation of an otherwise same elliptical orbit on this image (all the three orbits are in ...
5
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5answers
478 views

Could an aircraft ever simulate Martian gravity perpendicular to the aircraft's floor?

Suppose I designed a complex, self-contained, robotic system to harvest and convert Martian atmospheric CO2 and ground H2O into rocket fuel (CH4 + O2) and after exhaustive computational fluid dynamic (...
5
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1answer
1k views

What does “masquerading zero gravity” mean?

From the book Packing for Mars: An entire odd universe of mock outer space has grown up here on earth. Capsules that never blast off; hospital wards where healthy people spend months on their ...
5
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1answer
111 views

How much of the Shuttle was physically realized in the simulator?

How much of the Shuttle physically existed in the simulator? Was it just the flight deck? Or were the mid-deck, lower equipment bay, and/or payload bay also included?
5
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3answers
713 views

Keplerian approximations for moons as well as planets

I'm writing code to simulate planetary and lunar orbits in a heliocentric reference plane. I'm using E.M. Standish's Keplerian Elements for Approximate Positions of the Major Planets as my reference ...
5
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1answer
511 views

Books on rocket engine *dynamics*? [closed]

I'm a controls guy and I would like to "emulate" a given rocket engine's response behavior to different thrust signals inside a computer simulation. Thus I'm looking for a book that explains well the ...
5
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0answers
379 views

Optimizing Suicide Burn

For a landing via suicide burn, I have identified three phases: Starting at $t_0$, the craft approaches the ground with $v_x$ constant and $v_y$ gradually increasing (due to gravity) At $t_b$, the ...
4
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2answers
164 views

Was a real Space Shuttle ever used as a really big simulator?

@OrganicMarble's answer to How much of the Shuttle was physically realized in the simulator? makes me wonder if Shuttle crew ever sat or stood or otherwise experienced being in an actual Space Shuttle ...
4
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1answer
307 views

What type of software is used to make radiation shielding simulations for use in Space or Mars?

Hopefully this is relevant to the board and doesn't get deleted. Quick background: In Thailand. Grad student, mechanical engineering, with very limited knowledge regarding nuclear or space radiations. ...
4
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0answers
323 views

How can I visualize orbits given Earth-centered, inertial (ECI) coordinates?

I'm using the SGP4 algorithm which outputs Earth-centered, inertial (ECI) satellite coordinates. I found some software to visualize orbits, but they all request input as Keplerian elements. How can ...
3
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3answers
958 views

Who does these mesmerizing simulations of the phases of the Moon? And how?

It's lunar new year here and people will be lighting fire crackers and launching bottle rockets off and on until dawn, so I thought I would read up on it. EarthSky.org's Moon Phases update Your new ...
3
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2answers
583 views

Does anyone know how the Flight Club website simulates Falcon 9 launches?

Does anyone know how the Flight Club website is able to provide falcon 9 launch simulations? Given the estimated weight, fuel mass, thrust, ect, how are they able to provide a graph of how it could ...
3
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1answer
300 views

Lunar lander, apollo 11, start position

If i were to simulate a lunar module with: $x_0$, $\dot{x}_0$, $y_0$, $\dot{y}_0$. $x$ is horizontal position, and $y$ is vertical position. What would be appropriate values?
3
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1answer
132 views

What space simulators are the most accurate at simulating real world physics?

We've all at least heard of KSP, a popular space flight simulator. its not the best but can teach someone the basics at rocket science, delta V, burntime, basic orbital maneuvers, retrograde, prograde,...
3
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1answer
1k views

How do you Model Hyperbolic Orbits?

I'm programming an orbital simulator and need some help modeling hyperbolic orbits (or trajectories, whatever you want to call them). So far I can model elliptical orbits with the standard orbital ...
3
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1answer
349 views

Rocket Launch Simulation Source Code Locations

As you can take from the title, does anyone know where I could find the source code for a working launch simulation type application such as FlightClub for example?
3
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1answer
80 views

ECSS Simulation Modelling Portability

Is there anyone who applied "ECSS-E-ST-40-07C Space engineering – Simulation modelling platform standard" to their simulation? I wonder is the standard really applicable or applied by someone. Some ...
3
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1answer
430 views

How to implement SGP4 C++, satellite propagator?

I would like to ask about how to implement the SGP4 code in C++ by Vallado. How can I implement the libraries that are available in https://celestrak.com/software/vallado-sw.php. I think that are the ...
3
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0answers
181 views

Atmospheric Entry Simulation: Numerical Inaccuracy

I am trying to make an atmospheric entry/aero-assist simulation. For the propagator, I have used conventional equations of motions in planet fixed reference frame: where the scalar states are- ...
2
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2answers
636 views

How should I scale the Solar System for my video game?

I am making a multiplayer video game, and am wondering how I should scale the in-game universe. The game has pseudo-realistic travel, but I want the scaling to be large enough to offer challenging ...
2
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2answers
1k views

How to calculate the trajectory needed to enter geostationary orbit?

Im building a rocket simulation engine and I would like to try and calculate the components of acceleration required to get the rocket into geostationary orbit. For example, the yellow and green lines ...
2
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1answer
91 views

Controlling suicide burn landing location in a python simulation?

I recently asked a question in stackoverflow about Simulation of suicide burn in openai-gym's LunarLander. Sadly most of my assumptions about suicide burn implementaion were wrong but the answer given ...
2
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1answer
103 views

The Tootronaut is ready to enter the Earthtoo atmosphere, will it be twice as hot?

In this question I posed the problem of getting an inhabitant of the planet Earthtoo into low orbit (LEtooO) using conventional rocket. Judging by the great answers there, it is - to my surprise - ...
2
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1answer
88 views

Getting the scale, placement and color correct

I am trying to create a graphic with the sun, moon, and earth in the same frame as if looking from the end of the Apex node, assuming a 100,000 km tether, but with the correct sizes, placement, axis ...
2
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1answer
65 views

How significant is orbit propagator choice/error when considering a year-long satellite coverage simulation, and which is the most appropriate?

I'm currently considering a project to simulate the (Earth-seeing) coverage of 1 or more satellites over the course of a year. The point would be to compare how different orbits result in different ...
2
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0answers
60 views

Are Planet orbits available to download in some vectorial format file?

I would like to work with solar system planet orbits in a Geographic Information Software like QGIS, so: Are available to download the orbits of solar system planets in some vector format?
2
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0answers
126 views

Is “Space Shuttle” written as a proper noun in the spaceflight industry?

Writing the question Was a real Space Shuttle ever used as a really big simulator? (and several others) I capitalize Space Shuttle because as far as I know, that's the actual name of NASA's spacecraft,...
2
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0answers
123 views

Recalculate Orbital Elements after a ΔV

I would like to write a program able to simulate a keplerian orbite given an initial position and velocity (r0, v0) and able to manage accelerations in different directions. To simulate the orbit, I ...
2
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0answers
51 views

How to create a new reactant Ammonium Dinitramide NH4[N(NO2)] in NASA CEA?

Ammonium Dinitramide(ADN) is a compound used as a green propellant for spacecraft propulsion applications. ADN-blends like LMP103S and FLP-106 are currently under development. However, performing a ...
2
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0answers
125 views

How do you simulate the effects of microgravity on plants?

My team and I are working on planting in space. What equipment/techniques are used to simulate microgravity on earth for such experiments?