# EME2000 ↔ GCRF Transformations

Constant frame bias transformations between Earth Mean Equator and Equinox of J2000.0 (EME2000, classical inertial) and Geocentric Celestial Reference Frame (GCRF, modern inertial).

**note**
For conceptual explanations and examples, see [EME2000 ↔ GCRF Transformations](../../learn/frames/eme2000_gcrf.md) in the Learn section.

## EME2000 to GCRF

::: brahe.state_eme2000_to_gcrf

::: brahe.position_eme2000_to_gcrf

::: brahe.rotation_eme2000_to_gcrf

## GCRF to EME2000

::: brahe.state_gcrf_to_eme2000


::: brahe.position_gcrf_to_eme2000


::: brahe.rotation_gcrf_to_eme2000

## Frame Bias Matrix

::: brahe.bias_eme2000

## See Also

- [GCRF ↔ ITRF Transformations](gcrf_itrf.md) - GCRF to Earth-fixed transformations
- [Reference Frames Module](index.md) - Complete API reference for frames module