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Installation
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The basics
Event detection
Variational ODEs
More on the expression system
Parallelisation and vectorisation
Extended and reduced precision
Lagrangian and Hamiltonian mechanics
Interoperability with SymPy
Compiled functions
EOP and space weather data
- Working with EOP data
- Working with space weather data
Analytical theories and models
Earth orbit dynamics
- Third-body perturbations
- Geopotential
A differentiable SGP4 propagator
Pickle support
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Examples

Celestial mechanics and astrodynamics
Event detection
Machine Learning
Variational equations
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API reference

Common keyword arguments
Expression system
Numerical integrators
- heyoka.taylor_adaptive
- heyoka.taylor_adaptive_batch
Variational ODE systems
- heyoka.var_ode_sys
- heyoka.var_args
Lagrangian and Hamiltonian mechanics
- heyoka.lagrangian
- heyoka.hamiltonian
Models
EOP and space weather data
JIT compilation
- heyoka.code_model

Repository
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.rst

Time transformations

Contents

Functions
Attributes

Time transformations#

Functions#

delta_tdb_tt([time_expr])

Difference between TDB and TT.

Attributes#

Difference between TT and TAI.

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By Francesco Biscani and Dario Izzo

© Copyright 2020-2025 Francesco Biscani and Dario Izzo.