Recent content by a_potato

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    Undergrad Enforcing artificial frozen orbit

    mfb- RAAN is not normally considered in a frozen orbit as it must always precess relative to something (e.g. a sun-sync orbit processes relative to an inertial system). Perigee is important in constellations with small altitude separations between orbit planes, such that the apogee of one is...
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    Undergrad Enforcing artificial frozen orbit

    Hello, I'm interested in how to formulate a simple constellation in which there are two satellites with identical orbital parameters (eccentricity <0.003, same inclination and aligned arg. Perigee, same RAAN) but which have different altitudes (e.g. Semi major axis) which are around 1000km and...
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    High School Color of sky based on atmosphere density

    This is nonsense. Go to Wikipedia and look up 'Rayleigh scattering'
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    Best degree to choose for money?

    Mathematics. A robust topic that is a foundation for many career paths. You know it makes sense.
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    What are the potential challenges of achieving zetascale computing?

    So exascale is going to be predominantly a power issue. What about the zeta scale platform? What kind of new and unique issues are we going to come across At that point?
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    Graduate Calculation of absorption coefficients of gases at moderate temperatures

    Thanks for that. Looks very comprehensive.
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    Graduate Calculation of absorption coefficients of gases at moderate temperatures

    Hello chaps, I'm trying to calculate absorption coefficients of gases at moderate temperatures ie ranges in which diatomic gases (such as N2 orO2) are partially disassociated or ionised, therefore including molecular bands as well as continuum. Can anyone recommend some suitable reading...
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    Graduate Can You Help With Finite Element Analysis in Cylindrical Coordinates?

    You need to transform your equations from 2d Cartesian to 2d cylindrical, taking care on all the differential operators (not sure what equations you're using). You can then discretise these using conventional finite element techniques (e.g galerkin or similar). Note: Cartesian xy will yield...
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    High School Machian Relativity: New Theory Glyn Phillips Can't Disprove

    Gentlemen, I've stumbled upon a book called 'Machian Relativity: The New Theory That No Scientist Can Disprove' by Glyn Phillips, and was just wondering whether anybody else has come across it and/or understands what this chap is going on about. I had a quick flick through some pages on amazon...
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    Physics Jobs: GCSE, A Level & Degree Opportunities

    A number of possible career options are available to you, ranging from a service expert at MacDonalds to chief scientist at one of the UK research companies. And everything in between. What do you want to do? Earn money? Defend the country? Write papers and bathe in academic glory? Just make...
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    Who do you consider the 3 greatest mathematicians ever?

    Euler (most prolific by far), Gauss and Hilbert
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    Fluid Mechanics Viscous Dissipation

    Um.. I think you need to be a bit more specific. What form are you working with?
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    Trajectory of an airdropped bomb

    I suspect MFN is right and the assumptions in drag coefficient and it's impact on the final position is probably dominant over issues of initial angular momentum
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    Theoretically, how much energy would it take for a wormhole

    Hmm, I would guess the equivalent of about 3000 times the mass of Jupiter in negative energy should just about do the trick.
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    Fortran [FORTRAN] Assigning bad values in arrays

    That is somewhat over the top for a compiler. Also, any code worth it's salt and written to actually do something useful would not have many cases where array bound errors could be spotted at compile time