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Documentation / @interstellar-tools/types / CwStateDerivative

Type Alias: CwStateDerivative ​

ts
type CwStateDerivative = readonly [
  number,
  number,
  number,
  number,
  number,
  number
];

Defined in: orbits.ts:79

Time derivative of CwState for CW/Hill dynamics.

Ordered as:

  • Position derivatives: [xDot, yDot, zDot]
  • Acceleration terms: [xDDot, yDDot, zDDot]

Units:

  • First three components: velocity (m/s or km/s).
  • Last three components: acceleration (m/s² or km/s²).

Useful as the return type for an ODE RHS function, e.g. cwHillDerivatives(state, n).

Example ​

ts
const ds: CwStateDerivative = [
  0, // xDot (m/s)
  0.01, // yDot (m/s)
  0, // zDot (m/s)
  0.0002, // xDDot (m/s²)
  0, // yDDot (m/s²)
  0 // zDDot (m/s²)
];