Questions tagged [mission-design]

Mission design is the process of designing a spacecraft to fulfill a particular objective.

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14
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4answers
3k views

Were the consoles in mission control computers or terminals for displaying information?

Were the consoles simple display terminals or were they computers? If terminals were they tied into a computer for control purposes? If a change in trajectory was necessary was it performed from the ...
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1answer
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Using Space Stations in fixed orbits instead of Space Ships for the Whole Journey

I'm very new, so I hope this question is within the guidelines of this group. I remember an interview with Sally Ride where she mentioned using a larger habitat/space station that was put into a ...
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Why/When was a crew of three considered in the first place?

I cannot find why and when during apollo program development, the choice for a crew of three astronauts was made. CSM was built for three, LM for two astronauts. Where does this choice come from in ...
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Why was ISRO's CARE reentry demonstration at 5300 m/s so slow?

This community wiki answer to What are some details of ISRO's Gaganyaan Mission currently says: Crew Module Atmospheric Re-entry Experiment (CARE) was launched on 18 December 2014 at 04:00 UTC. ...
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What key mission events fell on birthdays or anniversaries due to fine tuning by Robert Farquhar?

NPR's 2014 news article and audio podcast: Space Thief Or Hero? One Man's Quest To Reawaken An Old Friend says of Robert Farquhar (NASA, Wikipedia): Farquhar is now 81 years old. He's been called the ...
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1answer
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When things land on Mars what fraction of their velocity do they remove propulsively?

Some recent comments have got me wondering about this What is the distance between one of the mars's satellite revolving near the highest volcano olympus mons and the volcano olympus mons? comments ...
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Why was circa 600 volts used for DAWN's ion propulsion?

This answer estimates that the DAWN spacecraft's solar-electric propulsion accelerated about 3 milligrams of Xe+1 per second, using roughly 1350 Watts of electrical power. I estimate that 3 mg/sec of ...
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What ways can a University Student get involved in Trajectory Design?

As a physics student (not an engineer) in India, I can't seem to find a lot of opportunities to involve myself in what I find most appealing about what I'm studying in University i.e. astrodynamics. ...
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1answer
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Going to Eros; what to consider choosing between ion and chemical propulsion?

When planning a mission to a close approach to the asteroid Eros and to remain nearby, what are the factors that one would need to consider when choosing between ion propulsion and chemical propulsion?...
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Can the different "additional" demands on the Space Shuttle be broken down in terms of additional demands on hardware? How so?

Related: Could Space Shuttle's wings be diminished? During the sanctioning and early development of the Space Shuttle, things got somewhat budget-political, and a number of additional design ...
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What is the delta-v required to reach Titan (Saturn's moon)

How much speed do I need to put something to orbit on Titan? I know it is a simple question but look among those maps that are there but they are not clear to me.
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1answer
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Calculations needed to full-design a rocket

Suppose I want to put a cubesat in Titan's orbit (saturn's moon). and I want to calculate what rocket power I need, how do I calculate it? Where do I begin? total mass of the probe or delta-v needed? ...
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Name any misssions which were conducted due to urgency or due to some emergency in a very limited time?

I would like to know if there were any space missions which were conducted due to an immediate emergency and I wish to know how they were managed.
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2answers
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Why do orbits in the Iridium constellation have an inclination of 86.4°?

Wikipedia's Iridium_satellite constellation; In-orbit spares says that Iridium satellites have an inclination of 86.4°: Significant orbital inclination changes are normally very fuel-intensive, but ...
2
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1answer
108 views

Why would a mission choose a geosynchronous orbit over a geostationary orbit?

I was going to ask "Are there any missions where a geosynchronous orbit is advantageous over a geostationary orbit?" The TL;DR answer to this question (Are there any satellites in geosynchronous but ...
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What percentage of a satellite's total budget goes into its launch?

Been trying to do some personal market analysis of the space market, and realized that there doesn't seem to be any kind of statistic or average regarding how much percentage the launch of a satellite ...
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1answer
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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 ...
2
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2answers
438 views

Two-body problem VS Three-body problem Applications

The two-body problem deals with two bodies under certain assumptions while the restricted three-body problem deals with three bodies where one has a negligible mass (i.e. spacecraft or comet) I was ...
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Major topic headings for lunar CubeSat mission design planning?

I am working on a project to design a complete mission for a lunar CubeSat. Assuming that the launch segment is already covered and I need to focus on the spacecraft design. I wanted to know what ...
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1answer
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Has any mission to Titan tested the idea of producing electricity from Saturn's magnetic field?

From an answer to Astronomy SE question How does Titan maintain the atmosphere And we know the idea of generating electricity with a coil orbiting through a planet's magnetic field is sound in ...
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3answers
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What target is the most difficult to reach in the solar system?

"Most difficult", as in the minimum $\Delta v$ required, the objective being capture into an orbit around the object. Looking through some Delta-v maps, I would suspect the answer to be some inner ...
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Where in the solar system could a nuke be tested without anybody noticing?

Testing nuclear weapons is difficult on earth because of the large number of parties that want to prevent such tests from happening. Say that a country with a space program wants to test a nuclear ...
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1answer
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Are there planned sungrazing probes?

Reading about sungrazing comets, that can reach speed of +600km/s at perihelion, and about sungrazing comets being used as probes. Are there any planned mission involving a sungrazing probe, able to ...
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Travel To Mars - Fast [duplicate]

I wonder if it is possible to design a mission to Mars that would slingshot around the sun i.e., gravity assist. The Helios misions (which used gravity assist from Sun as I understand) have done this ...
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Does Lightsail-2 take significant advantage of the Oberth effect?

The cubesat Lightsail-2 has been deployed and has communicated with ground stations. See The Planetary Society's LightSail 2 Healthy as Mission Team Continues Spacecraft Checkouts In the near future,...
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How does the centre of mass of a spacecraft vary in a trajectory?

We all know that rockets have thrust along with a large mass flow, meaning that their mass is constantly depleted. For ground launcher rockets, the propellants form a large part of the mass and this ...
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Why doesn't Rocket Lab use a solid stage?

I was just reading about the Scout, an all-solid rocket, and thought of Rocket Lab's Electron, which seems to have a similar mission of deploying small payloads to orbit. I understand the engines to ...
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1answer
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Satellite mission design/performance requirements to attitude/orbit control design specifications

Are there any good sources that discuss: the steps involved in deriving attitude/orbit control design specifications, from satellite mission design/performance requirements?
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Average acceleration of a rocket

Given a rocket has a minimum acceleration with full tanks of say 1 g and a max acceleration with empty tanks of 3g, what's the average acceleration? Is it just 2
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How far did Hayabusa-2 back off before the "bomb" went off?

The BBC News article Hayabusa-2: Japanese probe set to 'bomb' an asteroid says: The charge is carried on the Small Carry-On Impactor (SCI) device. This is a 14kg conical container attached to ...
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Where can I get design details about spacecrafts and space mission? [closed]

I am doing a project on designing a mission to Mars. I am researching similar missions and I want to find information on the mission details like Delta V, trajectories etc. and details of the ...
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Why are hexa airfoils used on rockets despite having more drag that diamond airfoils?

I was doing a study on airfoils shape for a rocket. I tested the diamond and the hexagonal airfoil with Missile DatCom, RasAero and the Shock Expansion theory and from my results it seems like the ...
4
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2answers
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When will Parker Solar Probe begin "doing science"-- is it already?

Parker solar probe is going to be doing 7 fly-bys of Venus before it reaches its lowest point in its orbit around the sun. Will it be doing anything before it reaches the lowest point? We're still ...
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Why is that max-Q doesn't occur in transonic regime?

Is there any reason why the maximum dynamic pressure should not occur in the transonic regime. It is clear from this answer that the max-Q for various rockets occur outside the transonic region Do ...
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2answers
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What are the limiting factors for interplanetary mission trajectories?

Besides the hard limit of available Delta V, and the soft limit of the time to destination, what are the main constraints when planning an interplanetary mission? I'm thinking things like maximum ...
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Understanding Coefficient of Drag Verses Mach Number for Launch Vehicles

I've been working on a design for a sounding rocket that can go to the Karman line, that I want to make my senior capstone project next year. As a part of this process, I am making a program to ...
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1answer
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How are Voyager's 16 thrusters oriented? Table that enumerates them and specifies directions quantitatively

Question: How are Voyager's 16 thrusters oriented? UPDATE: Per the 2nd half of my comment below: ...Since there was no activity here I decided to add the bounty to get this wrapped up. There are 16 ...
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2answers
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How much did we know about lunar soil conditions prior to Apollo 11?

Hello everyone who have answered / commented on my question. Thanks for showing interest. What I was looking for is whether NASA or any other agency attempting to land something (any object) on moon, ...
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What is the practical use of the Karman line?

There have been several questions recently about the details of the definition of the Karman Line and the history of those calculations. This is not about those issues. The question is: In practical,...
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Why is DSCOVR in a Lissajous orbit? Wouldn't a halo orbit completely avoid the Sun exclusion zone?

Halo orbits are a sub-class of Lissajous orbits. See this answer for (much) more on that. DSCOVR's orbit will put it in it's Sun Exclusion Zone in about 2020 where the communications line of sight ...
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When an how will BepiColombo and MIO separate? (JAXA’s Mercury Magnetospheric Orbiter)

edit: JAXA’s Mercury Magnetospheric Orbiter (MMO) is now called MIO – Mercury Magnetospheric Orbiter’s New Name. With all the fanfare about BepiColombo (mine included) I didn't realize that there ...
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1answer
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Is Hohmann transfer the most frequent transfer orbit?

I have to complete a project for a university exam. The task is to design an interplanetary trajectory from Earth to Saturn, and to compare it with a Hohmann transfer to the same planet. I also have ...
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2answers
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Have there been any spacecraft with internal SRM other than CONTOUR?

I read about the CONTOUR mission which used an internal solid rocket motor to change the trajectory. Have there been other spacecraft using a solid rocket motor which is not jettisoned after usage?
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1answer
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Spacing for Martian Seismic Network

Assuming 4 stationary probes equipped with seismometers similar to InSight, how far apart should they be placed to optimize studying the deep interior of Mars? Is it necessary for them to be spaced ...
6
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1answer
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Does the ISS still "need" to be at around 400 km?

The video Why is the International Space Station 400 km above the Earth? first mentions that there are fairly hard limits at 300 km (due to imminence of reentry) and 700 km (loss of protection from ...
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Does NOAA still plan to deploy all twelve Cosmic-2 GPS radio occultation satellites?

In the 2014 Space News interview of Jim Bridenstine (now NASA administrator, then member of the US house of representatives for Oklahoma) Q&A With Rep. Jim Bridenstine (R-Okla.) appears: Space ...
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How to specify constraints for launch windows

I'm trying to learn trajectory design and optimization, and I'm struggling to understand how one determines the launch window using trajectory design programs. I know that my satellite's initial ...
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2answers
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Could the Lunar Lagrange Points work for space telescopes?

Every orbit in space has its pros and cons. Low Earth Orbit has accessibility but frequent eclipses whereas a Solar Lagrange Point is clear and stable but distant. In the case of the Lunar Lagrange ...
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How does the Parker Solar Probe have such a wide launch window?

The Parker Solar Probe is set to launch on August 11th 2018. It will perform 7 orbit-lowering gravity assists around Venus for ~6 years before reaching its final operational orbit. It has been well ...
3
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1answer
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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 ...