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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.

46
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10answers
8k 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 ...
2
votes
0answers
72 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?
2
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0answers
47 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. ...
2
votes
2answers
214 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 ...
1
vote
0answers
71 views

Space model transfer to moon displacement [closed]

I'm having a problem with the insertion from a LEO orbit into a moon orbit/ moon flyby in my gravity simulator. I use the calculations listed below. I think it is due to the fact that the moon pulls ...
5
votes
5answers
374 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
votes
2answers
259 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
votes
0answers
167 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
votes
0answers
258 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 ...
5
votes
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 ...
4
votes
0answers
139 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- ...
4
votes
0answers
96 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....
10
votes
7answers
880 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 ...
5
votes
1answer
354 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
votes
0answers
279 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 ...
1
vote
2answers
240 views

Calculating hyperbolic orbit elements for interplanetary intercepts

As part of a final year project at university I'm currently trying to simulate an interplanetary transfer between Earth and Mars for a manned mission. The ultimate aim is to use NASA's GMAT to ...
35
votes
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.
5
votes
3answers
444 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 ...
4
votes
3answers
810 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 ...
1
vote
1answer
765 views

Space Flight Simulator [duplicate]

There are multiple simulator-games around (orbiter, lunar flight), but how accurate they are? Is there "more scientific" (not a game) simulator? Q: What is the most accurate and commercially ...
1
vote
2answers
806 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 ...
4
votes
1answer
263 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?
4
votes
0answers
257 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 ...
2
votes
1answer
81 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 - ...
1
vote
2answers
241 views

Can planet Earthtoo put a Tooian in orbit too?

Planet Earthtoo saw that Earth could put a person in orbit, so they wanted to go to space too. The planet Earthtoo is twice the diameter of Earth, with the same internal structure - the average ...
0
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0answers
36 views

Orbit Determination Question for Numerical Launcher Simulation [duplicate]

For a Senior Design Project (Which has been completed and submitted) I (and another teammate) made a numerical simulation for a single stage launch vehicle from mars that included a lot of various ...
4
votes
1answer
626 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 ...
1
vote
0answers
59 views

Tools to evaluate telecommunications link budget [closed]

Can you name some of the commercially and non-commercially available tools to evaluate the link budget for a space mission? Aside Satellite Tool Kit, of course ;)
3
votes
1answer
86 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 ...
0
votes
1answer
304 views

Is specific orbital energy a constant? How does this affect the semi-major axis?

I'm working on a simulation with 2 bodies - one a star and the other an orbiting planet. I calculated the orbital energy from the first part of ${v^{2} \over {2}}-{\mu \over {r}}=-{\frac {\mu }{2a}}...
3
votes
1answer
453 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 ...
6
votes
3answers
2k 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 ...
0
votes
2answers
382 views

How can a body experience weightlessness or micro gravity on the ground? [closed]

I was thinking how to have a situation on Earth of feeling weightlessness for an indefinite time, not for a few minutes like on a diving plane Not reduced gravity, weightlessness as I feel in a ...
9
votes
1answer
736 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 ...
14
votes
1answer
750 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....
2
votes
2answers
569 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 ...