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Home > Hacker Public Radio > HPR2598: Calculating planetary orbits in Haskell
Podcast: Hacker Public Radio
Episode:

HPR2598: Calculating planetary orbits in Haskell
Category: Technology
Duration: 00:00:00
Publish Date: 2018-07-17 19:00:00
Description:

Function signatures (it might or might not be helpful to have these at hand while listening):

  • Helpers:
    radToDeg :: Floating a => a -> a
    degToRad :: Floating a => a -> a
    clamp :: Float -> Float

  • Time:

    day :: Int -> Int -> Int -> Float -> Day Float
  • Orbital parameters:
    longitudeOfAscendingNode :: Orbit body center => body -> center -> Day d -> LongAscNode body center
    inclinationToEcliptic :: Orbit body center => body -> center -> Day d -> InclToEcl body center
    argumentOfPeriapsis :: Orbit body center => body -> center -> Day d -> ArgPeri body center
    semiMajorAxis :: Orbit body center => body -> center -> Day d -> SemiMajor body center
    eccentricity :: Orbit body center => body -> center -> Day d -> Ecc body center
    meanAnomaly :: Orbit body center => body -> center -> Day d -> MeanAno body center
  • Calculating location on orbital plane:
    eccAnomaly :: MeanAno a b -> Ecc a b -> EccAnomaly a b
    trueAnomaly :: EccAnomaly a b -> Ecc a b -> TrueAnomaly a b
    dist :: EccAnomaly a b -> Ecc a b -> SemiMajor a b -> Distance a b
  • Translating between coordinate systems:
    toEclCoord :: TrueAnomaly a b -> Distance a b -> LongAscNode a b -> ArgPeri a b -> InclToEcl a b -> EclCoord a b
    toEqCoordinates :: EclCoord body Earth -> Day Float -> EqCoord body

Some helpful links:
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