Questions tagged [mission-design]

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

54 questions with no upvoted or accepted answers
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8
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230 views

Perseverance individual sample collection post-mission; what stops them from blowing away or getting covered and hidden by dust?

I have been seeing videos that the plan after Perseverance is done collecting samples to distribute them in 'strategic' locations around Mars for another rover to drive around and pick up later. Why ...
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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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255 views

How did NASA refer to dates and times of a mission in the 1970s?

Back in the 1970s, how did NASA describe when an event happened during a mission? For example, when Mariner 10 did its fly-by of Venus, how did the Mariner team refer to that moment in time? Did ...
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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 ...
6
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174 views

How could a minimal sample return only from the plumes of an ice moon, Ceres or Io be designed?

Would it be feasible and would it make sense to minimalistically design a sample-return-only mission (or class of missions) along these lines: Light weight plume collecting aerogel (like the Stardust ...
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Could the International Space Station (ISS) be refurbished to save money?

I was reading an old article about deorbiting ISS (Death Star: The ISS Doesn’t Have a Way to Crash Safely) and wondering if we could refurbish ISS instead of deorbiting it? I thought deorbiting it ...
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173 views

When was Lucy's mission first scripted in Excel and why is that what Lockheed Martin chose to do it with?

CNBC's NASA spacecraft launches toward Jupiter asteroids on an intricate path charted by Excel Years before Lucy took off, Lockheed Martin mission architect Brian Sutter used Excel to chart the ...
5
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Has lithocapture ever been seriously considered as a method of entering orbit around a planet or moon that lacks any atmosphere?

What I mean by lithocapture is an orbital transfer maneuver used to reduce the velocity of a spacecraft from a hyperbolic trajectory to an elliptical orbit around the targeted celestial body where the ...
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1answer
214 views

When jettisoning heavy objects from the ISS e.g. 2.9 tons of batteries+, how much angular impulse does the station get? Corrective actions necessary?

Discussion below this answer to Why does it take so long for ISS garbage to fall out of orbit? addresses the jettisoning of the ~2.9 ton pallet full of used batteries full of nickel and other things. ...
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86 views

Why are the four launch opportunities within each Inspiration4 launch window "about an hour apart"?

In the SpaceX Inspiration4 Launch broadcast at about T-01:31:05 (91 minutes before launch) the process for selection of launch windows for the mission is roughly ...
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131 views

Just how much "dumb luck" was reaching the space age during the "Grand Tour" opportunity? Would we have been SOL 1050 or 2100 years before/after?

@OscarLanzi's answer to Why is the gas giant grand tour interval 175 years when the synodic period of Uranus and Neptune is 171 years? is an excellent answer describing a subtle situation; each pair ...
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85 views

How efficient was Telstar's solar cell configuration, compared to a flat panel?

Telstar was a series of communication satellites first launched in 1962. The body of the satellite is roughly spherical, with much of the outer surface covered in solar cells. This gives the ...
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182 views

Why have astronauts had to take Soyuz capsules "out for a spin" on 15 separate occasions? (move from one Soyuz port to another)

NASA News item Space Station Crew to Relocate Soyuz to Make Room for New Crewmates says: Three residents of the International Space Station will take a spin around their orbital neighborhood in the ...
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150 views

Most open source spaceflight missions revealed unintentionally

As of 2021 there are few fully open source satellites (OSSI-1, UPSat, FossaSat-1, Oresat, some more?) and numerous student groups building and documenting rockets. These projects are intended to be ...
4
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90 views

What is the maximum force a deep space spacecraft experiences after launch?

The premise of How much of a deep space spacecraft's structural mass is useless dead weight after launch? Any plans to shed it in the future? is that the forces a deep space spacecraft experiences ...
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121 views

Where can I read about Lucy's complete propulsion system?

Wikipedia's /Lucy (spacecraft) says nothing of propulsion, and it's SWRI home page for the spacecraft http://lucy.swri.edu/mission/Spacecraft.html gives specification and enumerates what's on Lucy’s ...
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155 views

How are B-Plane parameters actually determined for a planetary flyby?

Reading from this document, I am trying to simulate the New Horizons probe trajectory in GMAT and I am puzzled with how the authors of the original paper (by legendary mission designer Robert W. ...
4
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149 views

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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275 views

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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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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93 views

Most dog-legged launch?

There are enough questions about dogleg maneuvers that there is now a dogleg tag, but the definitive dogleg answer is @JakeBlockers (linked below) which includes images of a dogleg from Florida that ...
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44 views

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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122 views

Has budgetary support for Juno been extended, or is it running out?

The Yahoo news article NASA’s Juno snapped another photo of Jupiter that looks like a watercolor painting is a reminder that Juno is generating plenty of data and beautiful images. The Juno ...
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156 views

Why isn't the Europa mission more ambitious given the capacity of SLS?

SLS Block I will have about three and Block II five times more capacity in terms of payload mass to LEO, than any launcher which has been used for an interplanetary mission to date. But the mission ...
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53 views

Design and optimization of a Sun-synchronous repeating ground track orbit constellation

I am currently researching about this topic and am very new to this. Have no clue how to go about designing a group of imaging satellites (constellation) that are sun synchronous with repeating ground ...
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Is there a fairly detailed outline of CAPSTONE's "highly efficient ballistic lunar transfer trajectory" from LEO to lunar near-rectilinear halo orbit?

NASA Ames's feature CAPSTONE’s CubeSat Prepares for Lunar Flight says CAPSTONE will use a hydrazine-fueled propulsion system during most of its three- to four- month journey to the Moon. This line of ...
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53 views

what kind of valves are used in payload fairing for venting?

I wanted to know that there have been a handful of literature that mentions vent openings in the rocket payload fairings. However, none specify the kind of valves used in those fairings? does anyone ...
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107 views

Unity 22's ground track; which direction was it moving horizontally at 1085 kph during its weightless phase?

update: According to The Newyorker's The Red Warning Light on Richard Branson’s Space Flight there is FR24 data available. A quick check of the videos shows Virgin Galactic's Unity 22's apogee of ...
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101 views

NASA Project Management Wall Chart

As an Undergraduate student and new to the field of Space mission design and systems etc, I want to know is there any detail explanation with examples of the jargon terms mentioned in the chart below? ...
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90 views

How might one redesign a "Curiosity-class" rover for a mission to Vesta or Ceres?

Vishnu Reddy (1, 2, 3) and their research group are quite active in space exploration both in Earth-based observation and now in the design of future spacecraft, and have recently pseudo-confirmed ...
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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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44 views

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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43 views

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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75 views

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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86 views

Compressible foam in space

I've started looking into the use of compressible foams used in space (specially in approximately 500 km SS orbit). I've tried to find some form of heritage or proof of concept missions that have used ...
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88 views

Which deep-space spacecraft flew closest by Earth during a gravitational assist?

The extremely cool NASA JPL video Triumph at Saturn (Part I) is really worth a watch and/or listen. (Don't forget Part II as well!) At about 26:30 it discusses ...
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Closest distance that two unrelated spacecraft have come while both in heliocentric orbits?

In 2015 STEREO A and B passed each other passing roughly behind the Sun at the same time from opposite directions as seen from Earth. But these two are part of a single mission, put into these orbits ...
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Did JUNO adjust it's orbit in order to fly over Clyde's spot again?

Phys.org's Juno returns to 'Clyde's Spot' on Jupiter says: The feature is informally named for amateur astronomer Clyde Foster of Centurion, South Africa, who discovered it in 2020 using his own 14-...
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156 views

How often are fewer than three astronauts present when moving a Soyuz spacecraft from one docking port to another?

CNN's Astronauts relocated a spacecraft outside the International Space Station (was it inside before?) says: Russian cosmonauts Sergey Ryzhikov and Sergey Kud-Sverchkov, along with NASA astronaut ...
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152 views

Did/do the current Mars missions coordinate?

The answer to the question why there are several Mars missions under way concurrently is that orbital mechanics offer an advantageous launch window of a few weeks every 26 months. With more than one ...
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93 views

How much of a deep space spacecraft's structural mass is useless dead weight after launch? Any plans to shed it in the future?

After seeing this in Security SE Magnetic core memory isn't quite extinct yet. The two Voyager spacecraft used it and are still functional. Core was/is certainly non-volatile. I did some ...
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Why SN8 needed 12.5 km?

Is there a particular reason for chosing 12.5 km for the SN8 hop? Why 5 km for example is not good enough?
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31 views

Does the displacement angle change after burnout?

I came across the above image on Nakka's page about fins and what I understood is that rockets will turn into the wind during the thrust phase, and will drift slightly with the wind after burnout. But ...
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40 views

Tools for high-thrust trajectory optimization

I've tried using some of the freely available tools for making pork chop plots to explore the potential of transfers between planets. But as far as I can tell, these really are not designed for and do ...
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What makes Earth-Mars transfers more non-Hohmann; inclination or eccentricity?

Answers to Why do many Mars missions launch now, if the Hohmann transfer orbit is the most propellant-saving one? and discussions below them made me wonder what makes Earth-Mars transfers more non-...
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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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275 views

MATLAB optimization script for Low - Thrust trajectory

I'm trying to write a script for a 'shape based' trajectory, based on the exponential sinusoid shape, for an Earth - Mars transfer. Essentially, I know where I want to start, and I know where I want ...
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How to use the Util and Base Code of the General Mission Analysis Tool

GMAT (General Mission Analysis Tool) provides detailed Util and Base Code, but I don't know how to use it, namely I still don't know how to access so many data of some missions. Can somebody provide ...
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15 views

After inserting CAPSTONE into a "highly efficient ballistic lunar transfer trajectory" Lunar Photon; to what separate orbit for its safe disposal how?

NASA Ames's feature CAPSTONE’s CubeSat Prepares for Lunar Flight says CAPSTONE will use a hydrazine-fueled propulsion system during most of its three- to four- month journey to the Moon. This line of ...
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0answers
29 views

How many instances are there of fiber optic cables used beyond cis-lunar space?

The first two posts linked below mention the use of a 6 meter fiber optical cable between Curiosity's ChemCam's receiver telescope on top of a tower and the spectrometer used to analyze the collected ...