GitHub

AstroModels

AstroModels provides physical models for astrodynamics applications, including spacecraft representations with orbital state, time, and physical properties. All models are designed for compatibility with automatic differentiation libraries.

Quick Start

using AstroModels, AstroStates, AstroEpochs, AstroFrames, AstroUniverse

# Create spacecraft with all key properties
sc = Spacecraft(
    # Orbital state (position and velocity)
    state = CartesianState([7000.0, 300.0, 0.0, 0.0, 7.5, 0.03]),
    
    # Epoch
    time = Time("2015-09-21T12:23:12", TAI(), ISOT()),
    
    # Mass (kg)
    mass = 1000.0,
    
    # Coordinate system
    coord_sys = CoordinateSystem(earth, ICRFAxes()),
    
    # 3D model for visualization
    cad_model = CADModel(
        file_path = "models/satellite.obj",
        scale = 100.0,
        visible = true
    ),
    
    # Name
    name = "MySat"
)

# History is automatically populated during propagation
# See Spacecraft > History for details
Spacecraft state data type

The spacecraft uses the OrbitState struct internally but accepts concrete state types (e.g., CartesianState, KeplerianState) at construction. See the State section for complete details.

Learn More