Features

IO Astrodynamics features

Celestial items (Body, Barycenters, Lagrange points, Stars)

• Get mass
• Get standard gravitational parameter
• Get orbital parameters at epoch
• Get ephemeris
• Get sub observer point
• Get sub solar point
• Get relative state vector
• Get sphere of influence
• Get hill sphere
• Get fixed frame
• Get polar and equatorial radius
• Get flattening
• Get angular velocity
• Get sideral rotation period
• Find Windows when a numerical constraint occurs
• Find Windows when an occultation occurs
• Compute geosynchronous orbit around a celestial body

Spacecraft

• Get mass
• Get standard gravitational parameter
• Get orbital parameters at epoch
• Get dry operating mass
• Get sub observer point
• Get sub solar point
• Define orientation by quaternion
• Get orientation
• Get ephemeris
• Get orientation windows coverage
• Get spacecraft's clock
• Add an instrument with circular, rectangular or elliptical field of view
• Add and configure fuel tank
• Add and configure engine
• Add and configure payload
• Release payload
• Find Windows where a numerical constraint occurs
• Find Windows when occultation occurs

Aberrations

• Converged Newtonian light time correction
• Planetary aberration
• Stellar aberration
• Transmission from observer

Coordinates

• Cylindrical
• Planetodetic
• Horizontal
• Latitudinal
• Planetographic
• Right ascension declination
• Rectangular
• Spherical

Frames

• Body fixed frames
• Inertial frames
• Site frames
• Spacecraft frames
• Instrument frames

Instruments

• Field of view
• Boresight
• Find windows where an object is in field of view
• Know where instrument points in a frame at given time

Math

• Matrix
• Quaternion
• Vector

Orbital parameters

• Conic orbital parameters
• Equinoctial orbital parameters
• State vector
• Two lines elements

Orbital parameters operations

• Get center of motion
• Get epoch
• Get period
• Get time to true anomaly
• Get time to mean anomaly
• Get mean motion
• Get specific angular momentum
• Get state vector
• Get orbit shape (Elliptical, Parabolic, Hyperbolic, Circular)
• Get Keplerian elements
• Get true anomaly
• Get eccentric anomaly
• Get linked frame
• Get perigee vector
• Get apogee vector
• Get ascending node vector
• Convert to RA-Dec
• Get velocity at perigee
• Get velocity at apogee
• Get mean longitude
• Get true longitude

Site

• Get state vector
• Get illumination parameters (Emission angle, Phase angle, Incidence angle)
• Launch windows
  • Find by day windows
  • Find by night windows
• Find windows on illumination constraints
• Get horizontal coordinates to body from site

Time

• TDB
• UTC
• Julian date
• Converter